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提交 26f31fb9 编写于 作者: L Linus Torvalds
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Merge tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging 

Pull hwmon updates from Guenter Roeck:
 - New drivers for ADC128D818, LTC2945, LTC4260, and LTC4222
 - Added support for LTM4676 to ltc2978 driver
 - Converted several drivers to use devm_hwmon_device_register_with_groups
 - Various cleanup in several drivers

* tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: (36 commits)
  hwmon: (pmbus/ltc2978) Add support for LTM4676
  hwmon: (pmbus/ltc2978) Add new chip ID for LTC2974
  hwmon: Do not accept invalid name attributes
  hwmon: (max6639) Use SIMPLE_DEV_PM_OPS macro
  hwmon: (lm95245) Make temp2_crit_hyst read-only
  hwmon: (lm95245) Convert to use devm_hwmon_device_register_with_groups
  hwmon: (lm95245) Drop useless debug message
  hwmon: (lm95245) Fix hysteresis temperatures
  hwmon: (max6639) Convert to use devm_hwmon_device_register_with_groups
  hwmon: (max6639) Introduce local dev variable, and reduce noisiness
  hwmon: (max6650) Introduce local 'dev' variable
  hwmon: (max6650) Drop error message after memory allocation failures
  hwmon: (max6650) Convert to use devm_hwmon_device_register_with_groups
  hwmon: (max6650) Rearrange code to no longer require forward declarations
  hwmon: (ltc4215) Convert to devm_hwmon_device_register_with_groups
  hwmon: (coretemp) Convert to use devm_hwmon_device_register_with_groups
  hwmon: (coretemp) Allocate platform data with devm_kzalloc
  hwmon: (coretemp) Use sysfs_create_group to create sysfs attributes
  hwmon: (ltc4245) Remove devicetree conditionals
  hwmon: (ltc4245) Drop debug messages
  ...
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Documentation/hwmon/adc128d818 0 → 100644
浏览文件 @ 26f31fb9
Kernel driver adc128d818
========================
Supported chips:
* Texas Instruments ADC818D818
Prefix: 'adc818d818'
Addresses scanned: I2C 0x1d, 0x1e, 0x1f, 0x2d, 0x2e, 0x2f
Datasheet: Publicly available at the TI website
http://www.ti.com/
Author: Guenter Roeck
Description
-----------
This driver implements support for the Texas Instruments ADC128D818.
It is described as 'ADC System Monitor with Temperature Sensor'.
The ADC128D818 implements one temperature sensor and seven voltage sensors.
Temperatures are measured in degrees Celsius. There is one set of limits.
When the HOT Temperature Limit is crossed, this will cause an alarm that will
be reasserted until the temperature drops below the HOT Hysteresis.
Measurements are guaranteed between -55 and +125 degrees. The temperature
measurement has a resolution of 0.5 degrees; the limits have a resolution
of 1 degree.
Voltage sensors (also known as IN sensors) report their values in volts.
An alarm is triggered if the voltage has crossed a programmable minimum
or maximum limit. Note that minimum in this case always means 'closest to
zero'; this is important for negative voltage measurements. All voltage
inputs can measure voltages between 0 and 2.55 volts, with a resolution
of 0.625 mV.
If an alarm triggers, it will remain triggered until the hardware register
is read at least once. This means that the cause for the alarm may
already have disappeared by the time the alarm is read. The driver
caches the alarm status for each sensor until it is at least reported
once, to ensure that alarms are reported to user space.
The ADC128D818 only updates its values approximately once per second;
reading it more often will do no harm, but will return 'old' values.
In addition to the scanned address list, the chip can also be configured for
addresses 0x35 to 0x37. Those addresses are not scanned. You have to instantiate
the driver explicitly if the chip is configured for any of those addresses in
your system.
Documentation/hwmon/lm95245
浏览文件 @ 26f31fb9
......@@ -24,8 +24,12 @@ is given within a range of -127 to +127.875 degrees. Remote temperatures are
given within a range of -127 to +255 degrees. Resolution depends on
temperature input and range.
Each sensor has its own critical limit, but the hysteresis is common to all
two channels.
Each sensor has its own critical limit. Additionally, there is a relative
hysteresis value common to both critical limits. To make life easier to
user-space applications, two absolute values are exported, one for each
channel, but these values are of course linked. Only the local hysteresis
can be set from user-space, and the same delta applies to the remote
hysteresis.
The lm95245 driver can change its update interval to a fixed set of values.
It will round up to the next selectable interval. See the datasheet for exact
......
Documentation/hwmon/ltc2945 0 → 100644
浏览文件 @ 26f31fb9
Kernel driver ltc2945
=====================
Supported chips:
* Linear Technology LTC2945
Prefix: 'ltc2945'
Addresses scanned: -
Datasheet:
http://cds.linear.com/docs/en/datasheet/2945fa.pdf
Author: Guenter Roeck <linux@roeck-us.net>
Description
-----------
The LTC2945 is a rail-to-rail system monitor that measures current, voltage,
and power consumption.
Usage Notes
-----------
This driver does not probe for LTC2945 devices, since there is no register
which can be safely used to identify the chip. You will have to instantiate
the devices explicitly.
Example: the following will load the driver for an LTC2945 at address 0x10
on I2C bus #1:
$ modprobe ltc2945
$ echo ltc2945 0x10 > /sys/bus/i2c/devices/i2c-1/new_device
Sysfs entries
-------------
Voltage readings provided by this driver are reported as obtained from the ADC
registers. If a set of voltage divider resistors is installed, calculate the
real voltage by multiplying the reported value with (R1+R2)/R2, where R1 is the
value of the divider resistor against the measured voltage and R2 is the value
of the divider resistor against Ground.
Current reading provided by this driver is reported as obtained from the ADC
Current Sense register. The reported value assumes that a 1 mOhm sense resistor
is installed. If a different sense resistor is installed, calculate the real
current by dividing the reported value by the sense resistor value in mOhm.
in1_input VIN voltage (mV). Voltage is measured either at
SENSE+ or VDD pin depending on chip configuration.
in1_min Undervoltage threshold
in1_max Overvoltage threshold
in1_lowest Lowest measured voltage
in1_highest Highest measured voltage
in1_reset_history Write 1 to reset in1 history
in1_min_alarm Undervoltage alarm
in1_max_alarm Overvoltage alarm
in2_input ADIN voltage (mV)
in2_min Undervoltage threshold
in2_max Overvoltage threshold
in2_lowest Lowest measured voltage
in2_highest Highest measured voltage
in2_reset_history Write 1 to reset in2 history
in2_min_alarm Undervoltage alarm
in2_max_alarm Overvoltage alarm
curr1_input SENSE current (mA)
curr1_min Undercurrent threshold
curr1_max Overcurrent threshold
curr1_lowest Lowest measured current
curr1_highest Highest measured current
curr1_reset_history Write 1 to reset curr1 history
curr1_min_alarm Undercurrent alarm
curr1_max_alarm Overcurrent alarm
power1_input Power (in uW). Power is calculated based on SENSE+/VDD
voltage or ADIN voltage depending on chip configuration.
power1_min Low lower threshold
power1_max High power threshold
power1_input_lowest Historical minimum power use
power1_input_highest Historical maximum power use
power1_reset_history Write 1 to reset power1 history
power1_min_alarm Low power alarm
power1_max_alarm High power alarm
Documentation/hwmon/ltc2978
浏览文件 @ 26f31fb9
......@@ -23,6 +23,10 @@ Supported chips:
Prefix: 'ltc3883'
Addresses scanned: -
Datasheet: http://www.linear.com/product/ltc3883
* Linear Technology LTM4676
Prefix: 'ltm4676'
Addresses scanned: -
Datasheet: http://www.linear.com/product/ltm4676
Author: Guenter Roeck <linux@roeck-us.net>
......@@ -33,7 +37,8 @@ Description
LTC2974 is a quad digital power supply manager. LTC2978 is an octal power supply
monitor. LTC2977 is a pin compatible replacement for LTC2978. LTC3880 is a dual
output poly-phase step-down DC/DC controller. LTC3883 is a single phase
step-down DC/DC controller.
step-down DC/DC controller. LTM4676 is a dual 13A or single 26A uModule
regulator.
Usage Notes
......@@ -75,7 +80,7 @@ in[N]_label "vout[1-8]".
LTC2974: N=2-5
LTC2977: N=2-9
LTC2978: N=2-9
LTC3880: N=2-3
LTC3880, LTM4676: N=2-3
LTC3883: N=2
in[N]_input Measured output voltage.
in[N]_min Minimum output voltage.
......@@ -95,7 +100,7 @@ temp[N]_input Measured temperature.
and temp5 reports the chip temperature.
On LTC2977 and LTC2978, only one temperature measurement
is supported and reports the chip temperature.
On LTC3880, temp1 and temp2 report external
On LTC3880 and LTM4676, temp1 and temp2 report external
temperatures, and temp3 reports the chip temperature.
On LTC3883, temp1 reports an external temperature,
and temp2 reports the chip temperature.
......@@ -123,11 +128,11 @@ power[N]_label "pout[1-4]".
LTC2974: N=1-4
LTC2977: Not supported
LTC2978: Not supported
LTC3880: N=1-2
LTC3880, LTM4676: N=1-2
LTC3883: N=2
power[N]_input Measured output power.
curr1_label "iin". LTC3880 and LTC3883 only.
curr1_label "iin". LTC3880, LTC3883, and LTM4676 only.
curr1_input Measured input current.
curr1_max Maximum input current.
curr1_max_alarm Input current high alarm.
......@@ -138,7 +143,7 @@ curr[N]_label "iout[1-4]".
LTC2974: N=1-4
LTC2977: not supported
LTC2978: not supported
LTC3880: N=2-3
LTC3880, LTM4676: N=2-3
LTC3883: N=2
curr[N]_input Measured output current.
curr[N]_max Maximum output current.
......
Documentation/hwmon/ltc4260 0 → 100644
浏览文件 @ 26f31fb9
Kernel driver ltc4260
=====================
Supported chips:
* Linear Technology LTC4260
Prefix: 'ltc4260'
Addresses scanned: -
Datasheet:
http://cds.linear.com/docs/en/datasheet/4260fc.pdf
Author: Guenter Roeck <linux@roeck-us.net>
Description
-----------
The LTC4260 Hot Swap controller allows a board to be safely inserted
and removed from a live backplane.
Usage Notes
-----------
This driver does not probe for LTC4260 devices, since there is no register
which can be safely used to identify the chip. You will have to instantiate
the devices explicitly.
Example: the following will load the driver for an LTC4260 at address 0x10
on I2C bus #1:
$ modprobe ltc4260
$ echo ltc4260 0x10 > /sys/bus/i2c/devices/i2c-1/new_device
Sysfs entries
-------------
Voltage readings provided by this driver are reported as obtained from the ADC
registers. If a set of voltage divider resistors is installed, calculate the
real voltage by multiplying the reported value with (R1+R2)/R2, where R1 is the
value of the divider resistor against the measured voltage and R2 is the value
of the divider resistor against Ground.
Current reading provided by this driver is reported as obtained from the ADC
Current Sense register. The reported value assumes that a 1 mOhm sense resistor
is installed. If a different sense resistor is installed, calculate the real
current by dividing the reported value by the sense resistor value in mOhm.
in1_input SOURCE voltage (mV)
in1_min_alarm Undervoltage alarm
in1_max_alarm Overvoltage alarm
in2_input ADIN voltage (mV)
in2_alarm Power bad alarm
curr1_input SENSE current (mA)
curr1_alarm SENSE overcurrent alarm
drivers/hwmon/Kconfig
浏览文件 @ 26f31fb9
此差异已折叠。
drivers/hwmon/Makefile
浏览文件 @ 26f31fb9
......@@ -25,6 +25,7 @@ obj-$(CONFIG_SENSORS_ABITUGURU3)+= abituguru3.o
obj-$(CONFIG_SENSORS_AD7314) += ad7314.o
obj-$(CONFIG_SENSORS_AD7414) += ad7414.o
obj-$(CONFIG_SENSORS_AD7418) += ad7418.o
obj-$(CONFIG_SENSORS_ADC128D818) += adc128d818.o
obj-$(CONFIG_SENSORS_ADCXX) += adcxx.o
obj-$(CONFIG_SENSORS_ADM1021) += adm1021.o
obj-$(CONFIG_SENSORS_ADM1025) += adm1025.o
......@@ -95,9 +96,12 @@ obj-$(CONFIG_SENSORS_LM93) += lm93.o
obj-$(CONFIG_SENSORS_LM95234) += lm95234.o
obj-$(CONFIG_SENSORS_LM95241) += lm95241.o
obj-$(CONFIG_SENSORS_LM95245) += lm95245.o
obj-$(CONFIG_SENSORS_LTC2945) += ltc2945.o
obj-$(CONFIG_SENSORS_LTC4151) += ltc4151.o
obj-$(CONFIG_SENSORS_LTC4215) += ltc4215.o
obj-$(CONFIG_SENSORS_LTC4222) += ltc4222.o
obj-$(CONFIG_SENSORS_LTC4245) += ltc4245.o
obj-$(CONFIG_SENSORS_LTC4260) += ltc4260.o
obj-$(CONFIG_SENSORS_LTC4261) += ltc4261.o
obj-$(CONFIG_SENSORS_MAX1111) += max1111.o
obj-$(CONFIG_SENSORS_MAX16065) += max16065.o
......
drivers/hwmon/adc128d818.c 0 → 100644
浏览文件 @ 26f31fb9
/*
* Driver for TI ADC128D818 System Monitor with Temperature Sensor
*
* Copyright (c) 2014 Guenter Roeck
*
* Derived from lm80.c
* Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
* and Philip Edelbrock <phil@netroedge.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/regulator/consumer.h>
#include <linux/mutex.h>
/* Addresses to scan
* The chip also supports addresses 0x35..0x37. Don't scan those addresses
* since they are also used by some EEPROMs, which may result in false
* positives.
*/
static const unsigned short normal_i2c[] = {
0x1d, 0x1e, 0x1f, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END };
/* registers */
#define ADC128_REG_IN_MAX(nr) (0x2a + (nr) * 2)
#define ADC128_REG_IN_MIN(nr) (0x2b + (nr) * 2)
#define ADC128_REG_IN(nr) (0x20 + (nr))
#define ADC128_REG_TEMP 0x27
#define ADC128_REG_TEMP_MAX 0x38
#define ADC128_REG_TEMP_HYST 0x39
#define ADC128_REG_CONFIG 0x00
#define ADC128_REG_ALARM 0x01
#define ADC128_REG_MASK 0x03
#define ADC128_REG_CONV_RATE 0x07
#define ADC128_REG_ONESHOT 0x09
#define ADC128_REG_SHUTDOWN 0x0a
#define ADC128_REG_CONFIG_ADV 0x0b
#define ADC128_REG_BUSY_STATUS 0x0c
#define ADC128_REG_MAN_ID 0x3e
#define ADC128_REG_DEV_ID 0x3f
struct adc128_data {
struct i2c_client *client;
struct regulator *regulator;
int vref; /* Reference voltage in mV */
struct mutex update_lock;
bool valid; /* true if following fields are valid */
unsigned long last_updated; /* In jiffies */
u16 in[3][7]; /* Register value, normalized to 12 bit
* 0: input voltage
* 1: min limit
* 2: max limit
*/
s16 temp[3]; /* Register value, normalized to 9 bit
* 0: sensor 1: limit 2: hyst
*/
u8 alarms; /* alarm register value */
};
static struct adc128_data *adc128_update_device(struct device *dev)
{
struct adc128_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
struct adc128_data *ret = data;
int i, rv;
mutex_lock(&data->update_lock);
if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
for (i = 0; i < 7; i++) {
rv = i2c_smbus_read_word_swapped(client,
ADC128_REG_IN(i));
if (rv < 0)
goto abort;
data->in[0][i] = rv >> 4;
rv = i2c_smbus_read_byte_data(client,
ADC128_REG_IN_MIN(i));
if (rv < 0)
goto abort;
data->in[1][i] = rv << 4;
rv = i2c_smbus_read_byte_data(client,
ADC128_REG_IN_MAX(i));
if (rv < 0)
goto abort;
data->in[2][i] = rv << 4;
}
rv = i2c_smbus_read_word_swapped(client, ADC128_REG_TEMP);
if (rv < 0)
goto abort;
data->temp[0] = rv >> 7;
rv = i2c_smbus_read_byte_data(client, ADC128_REG_TEMP_MAX);
if (rv < 0)
goto abort;
data->temp[1] = rv << 1;
rv = i2c_smbus_read_byte_data(client, ADC128_REG_TEMP_HYST);
if (rv < 0)
goto abort;
data->temp[2] = rv << 1;
rv = i2c_smbus_read_byte_data(client, ADC128_REG_ALARM);
if (rv < 0)
goto abort;
data->alarms |= rv;
data->last_updated = jiffies;
data->valid = true;
}
goto done;
abort:
ret = ERR_PTR(rv);
data->valid = false;
done:
mutex_unlock(&data->update_lock);
return ret;
}
static ssize_t adc128_show_in(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct adc128_data *data = adc128_update_device(dev);
int index = to_sensor_dev_attr_2(attr)->index;
int nr = to_sensor_dev_attr_2(attr)->nr;
int val;
if (IS_ERR(data))
return PTR_ERR(data);
val = DIV_ROUND_CLOSEST(data->in[index][nr] * data->vref, 4095);
return sprintf(buf, "%d\n", val);
}
static ssize_t adc128_set_in(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct adc128_data *data = dev_get_drvdata(dev);
int index = to_sensor_dev_attr_2(attr)->index;
int nr = to_sensor_dev_attr_2(attr)->nr;
u8 reg, regval;
long val;
int err;
err = kstrtol(buf, 10, &val);
if (err < 0)
return err;
mutex_lock(&data->update_lock);
/* 10 mV LSB on limit registers */
regval = clamp_val(DIV_ROUND_CLOSEST(val, 10), 0, 255);
data->in[index][nr] = regval << 4;
reg = index == 1 ? ADC128_REG_IN_MIN(nr) : ADC128_REG_IN_MAX(nr);
i2c_smbus_write_byte_data(data->client, reg, regval);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t adc128_show_temp(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct adc128_data *data = adc128_update_device(dev);
int index = to_sensor_dev_attr(attr)->index;
int temp;
if (IS_ERR(data))
return PTR_ERR(data);
temp = (data->temp[index] << 7) >> 7; /* sign extend */
return sprintf(buf, "%d\n", temp * 500);/* 0.5 degrees C resolution */
}
static ssize_t adc128_set_temp(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct adc128_data *data = dev_get_drvdata(dev);
int index = to_sensor_dev_attr(attr)->index;
long val;
int err;
s8 regval;
err = kstrtol(buf, 10, &val);
if (err < 0)
return err;
mutex_lock(&data->update_lock);
regval = clamp_val(DIV_ROUND_CLOSEST(val, 1000), -128, 127);
data->temp[index] = regval << 1;
i2c_smbus_write_byte_data(data->client,
index == 1 ? ADC128_REG_TEMP_MAX
: ADC128_REG_TEMP_HYST,
regval);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t adc128_show_alarm(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct adc128_data *data = adc128_update_device(dev);
int mask = 1 << to_sensor_dev_attr(attr)->index;
u8 alarms;
if (IS_ERR(data))
return PTR_ERR(data);
/*
* Clear an alarm after reporting it to user space. If it is still
* active, the next update sequence will set the alarm bit again.
*/
alarms = data->alarms;
data->alarms &= ~mask;
return sprintf(buf, "%u\n", !!(alarms & mask));
}
static SENSOR_DEVICE_ATTR_2(in0_input, S_IWUSR | S_IRUGO,
adc128_show_in, adc128_set_in, 0, 0);
static SENSOR_DEVICE_ATTR_2(in0_min, S_IWUSR | S_IRUGO,
adc128_show_in, adc128_set_in, 0, 1);
static SENSOR_DEVICE_ATTR_2(in0_max, S_IWUSR | S_IRUGO,
adc128_show_in, adc128_set_in, 0, 2);
static SENSOR_DEVICE_ATTR_2(in1_input, S_IWUSR | S_IRUGO,
adc128_show_in, adc128_set_in, 1, 0);
static SENSOR_DEVICE_ATTR_2(in1_min, S_IWUSR | S_IRUGO,
adc128_show_in, adc128_set_in, 1, 1);
static SENSOR_DEVICE_ATTR_2(in1_max, S_IWUSR | S_IRUGO,
adc128_show_in, adc128_set_in, 1, 2);
static SENSOR_DEVICE_ATTR_2(in2_input, S_IWUSR | S_IRUGO,
adc128_show_in, adc128_set_in, 2, 0);
static SENSOR_DEVICE_ATTR_2(in2_min, S_IWUSR | S_IRUGO,
adc128_show_in, adc128_set_in, 2, 1);
static SENSOR_DEVICE_ATTR_2(in2_max, S_IWUSR | S_IRUGO,
adc128_show_in, adc128_set_in, 2, 2);
static SENSOR_DEVICE_ATTR_2(in3_input, S_IWUSR | S_IRUGO,
adc128_show_in, adc128_set_in, 3, 0);
static SENSOR_DEVICE_ATTR_2(in3_min, S_IWUSR | S_IRUGO,
adc128_show_in, adc128_set_in, 3, 1);
static SENSOR_DEVICE_ATTR_2(in3_max, S_IWUSR | S_IRUGO,
adc128_show_in, adc128_set_in, 3, 2);
static SENSOR_DEVICE_ATTR_2(in4_input, S_IWUSR | S_IRUGO,
adc128_show_in, adc128_set_in, 4, 0);
static SENSOR_DEVICE_ATTR_2(in4_min, S_IWUSR | S_IRUGO,
adc128_show_in, adc128_set_in, 4, 1);
static SENSOR_DEVICE_ATTR_2(in4_max, S_IWUSR | S_IRUGO,
adc128_show_in, adc128_set_in, 4, 2);
static SENSOR_DEVICE_ATTR_2(in5_input, S_IWUSR | S_IRUGO,
adc128_show_in, adc128_set_in, 5, 0);
static SENSOR_DEVICE_ATTR_2(in5_min, S_IWUSR | S_IRUGO,
adc128_show_in, adc128_set_in, 5, 1);
static SENSOR_DEVICE_ATTR_2(in5_max, S_IWUSR | S_IRUGO,
adc128_show_in, adc128_set_in, 5, 2);
static SENSOR_DEVICE_ATTR_2(in6_input, S_IWUSR | S_IRUGO,
adc128_show_in, adc128_set_in, 6, 0);
static SENSOR_DEVICE_ATTR_2(in6_min, S_IWUSR | S_IRUGO,
adc128_show_in, adc128_set_in, 6, 1);
static SENSOR_DEVICE_ATTR_2(in6_max, S_IWUSR | S_IRUGO,
adc128_show_in, adc128_set_in, 6, 2);
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, adc128_show_temp, NULL, 0);
static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO,
adc128_show_temp, adc128_set_temp, 1);
static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO,
adc128_show_temp, adc128_set_temp, 2);
static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, adc128_show_alarm, NULL, 0);
static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, adc128_show_alarm, NULL, 1);
static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, adc128_show_alarm, NULL, 2);
static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, adc128_show_alarm, NULL, 3);
static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, adc128_show_alarm, NULL, 4);
static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, adc128_show_alarm, NULL, 5);
static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, adc128_show_alarm, NULL, 6);
static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, adc128_show_alarm, NULL, 7);
static struct attribute *adc128_attrs[] = {
&sensor_dev_attr_in0_min.dev_attr.attr,
&sensor_dev_attr_in1_min.dev_attr.attr,
&sensor_dev_attr_in2_min.dev_attr.attr,
&sensor_dev_attr_in3_min.dev_attr.attr,
&sensor_dev_attr_in4_min.dev_attr.attr,
&sensor_dev_attr_in5_min.dev_attr.attr,
&sensor_dev_attr_in6_min.dev_attr.attr,
&sensor_dev_attr_in0_max.dev_attr.attr,
&sensor_dev_attr_in1_max.dev_attr.attr,
&sensor_dev_attr_in2_max.dev_attr.attr,
&sensor_dev_attr_in3_max.dev_attr.attr,
&sensor_dev_attr_in4_max.dev_attr.attr,
&sensor_dev_attr_in5_max.dev_attr.attr,
&sensor_dev_attr_in6_max.dev_attr.attr,
&sensor_dev_attr_in0_input.dev_attr.attr,
&sensor_dev_attr_in1_input.dev_attr.attr,
&sensor_dev_attr_in2_input.dev_attr.attr,
&sensor_dev_attr_in3_input.dev_attr.attr,
&sensor_dev_attr_in4_input.dev_attr.attr,
&sensor_dev_attr_in5_input.dev_attr.attr,
&sensor_dev_attr_in6_input.dev_attr.attr,
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp1_max.dev_attr.attr,
&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
&sensor_dev_attr_in0_alarm.dev_attr.attr,
&sensor_dev_attr_in1_alarm.dev_attr.attr,
&sensor_dev_attr_in2_alarm.dev_attr.attr,
&sensor_dev_attr_in3_alarm.dev_attr.attr,
&sensor_dev_attr_in4_alarm.dev_attr.attr,
&sensor_dev_attr_in5_alarm.dev_attr.attr,
&sensor_dev_attr_in6_alarm.dev_attr.attr,
&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
NULL
};
ATTRIBUTE_GROUPS(adc128);
static int adc128_detect(struct i2c_client *client, struct i2c_board_info *info)
{
int man_id, dev_id;
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_BYTE_DATA |
I2C_FUNC_SMBUS_WORD_DATA))
return -ENODEV;
man_id = i2c_smbus_read_byte_data(client, ADC128_REG_MAN_ID);
dev_id = i2c_smbus_read_byte_data(client, ADC128_REG_DEV_ID);
if (man_id != 0x01 || dev_id != 0x09)
return -ENODEV;
/* Check unused bits for confirmation */
if (i2c_smbus_read_byte_data(client, ADC128_REG_CONFIG) & 0xf4)
return -ENODEV;
if (i2c_smbus_read_byte_data(client, ADC128_REG_CONV_RATE) & 0xfe)
return -ENODEV;
if (i2c_smbus_read_byte_data(client, ADC128_REG_ONESHOT) & 0xfe)
return -ENODEV;
if (i2c_smbus_read_byte_data(client, ADC128_REG_SHUTDOWN) & 0xfe)
return -ENODEV;
if (i2c_smbus_read_byte_data(client, ADC128_REG_CONFIG_ADV) & 0xf8)
return -ENODEV;
if (i2c_smbus_read_byte_data(client, ADC128_REG_BUSY_STATUS) & 0xfc)
return -ENODEV;
strlcpy(info->type, "adc128d818", I2C_NAME_SIZE);
return 0;
}
static int adc128_init_client(struct adc128_data *data)
{
struct i2c_client *client = data->client;
int err;
/*
* Reset chip to defaults.
* This makes most other initializations unnecessary.
*/
err = i2c_smbus_write_byte_data(client, ADC128_REG_CONFIG, 0x80);
if (err)
return err;
/* Start monitoring */
err = i2c_smbus_write_byte_data(client, ADC128_REG_CONFIG, 0x01);
if (err)
return err;
/* If external vref is selected, configure the chip to use it */
if (data->regulator) {
err = i2c_smbus_write_byte_data(client,
ADC128_REG_CONFIG_ADV, 0x01);
if (err)
return err;
}
return 0;
}
static int adc128_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct device *dev = &client->dev;
struct regulator *regulator;
struct device *hwmon_dev;
struct adc128_data *data;
int err, vref;
data = devm_kzalloc(dev, sizeof(struct adc128_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
/* vref is optional. If specified, is used as chip reference voltage */
regulator = devm_regulator_get_optional(dev, "vref");
if (!IS_ERR(regulator)) {
data->regulator = regulator;
err = regulator_enable(regulator);
if (err < 0)
return err;
vref = regulator_get_voltage(regulator);
if (vref < 0) {
err = vref;
goto error;
}
data->vref = DIV_ROUND_CLOSEST(vref, 1000);
} else {
data->vref = 2560; /* 2.56V, in mV */
}
data->client = client;
i2c_set_clientdata(client, data);
mutex_init(&data->update_lock);
/* Initialize the chip */
err = adc128_init_client(data);
if (err < 0)
goto error;
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
data, adc128_groups);
if (IS_ERR(hwmon_dev)) {
err = PTR_ERR(hwmon_dev);
goto error;
}
return 0;
error:
if (data->regulator)
regulator_disable(data->regulator);
return err;
}
static int adc128_remove(struct i2c_client *client)
{
struct adc128_data *data = i2c_get_clientdata(client);
if (data->regulator)
regulator_disable(data->regulator);
return 0;
}
static const struct i2c_device_id adc128_id[] = {
{ "adc128d818", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, adc128_id);
static struct i2c_driver adc128_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = "adc128d818",
},
.probe = adc128_probe,
.remove = adc128_remove,
.id_table = adc128_id,
.detect = adc128_detect,
.address_list = normal_i2c,
};
module_i2c_driver(adc128_driver);
MODULE_AUTHOR("Guenter Roeck");
MODULE_DESCRIPTION("Driver for ADC128D818");
MODULE_LICENSE("GPL");
drivers/hwmon/coretemp.c
浏览文件 @ 26f31fb9
......@@ -94,6 +94,8 @@ struct temp_data {
bool valid;
struct sensor_device_attribute sd_attrs[TOTAL_ATTRS];
char attr_name[TOTAL_ATTRS][CORETEMP_NAME_LENGTH];
struct attribute *attrs[TOTAL_ATTRS + 1];
struct attribute_group attr_group;
struct mutex update_lock;
};
......@@ -114,12 +116,6 @@ struct pdev_entry {
static LIST_HEAD(pdev_list);
static DEFINE_MUTEX(pdev_list_mutex);
static ssize_t show_name(struct device *dev,
struct device_attribute *devattr, char *buf)
{
return sprintf(buf, "%s\n", DRVNAME);
}
static ssize_t show_label(struct device *dev,
struct device_attribute *devattr, char *buf)
{
......@@ -393,20 +389,10 @@ static int get_tjmax(struct cpuinfo_x86 *c, u32 id, struct device *dev)
return adjust_tjmax(c, id, dev);
}
static int create_name_attr(struct platform_data *pdata,
struct device *dev)
{
sysfs_attr_init(&pdata->name_attr.attr);
pdata->name_attr.attr.name = "name";
pdata->name_attr.attr.mode = S_IRUGO;
pdata->name_attr.show = show_name;
return device_create_file(dev, &pdata->name_attr);
}
static int create_core_attrs(struct temp_data *tdata, struct device *dev,
int attr_no)
{
int err, i;
int i;
static ssize_t (*const rd_ptr[TOTAL_ATTRS]) (struct device *dev,
struct device_attribute *devattr, char *buf) = {
show_label, show_crit_alarm, show_temp, show_tjmax,
......@@ -424,16 +410,10 @@ static int create_core_attrs(struct temp_data *tdata, struct device *dev,
tdata->sd_attrs[i].dev_attr.attr.mode = S_IRUGO;
tdata->sd_attrs[i].dev_attr.show = rd_ptr[i];
tdata->sd_attrs[i].index = attr_no;
err = device_create_file(dev, &tdata->sd_attrs[i].dev_attr);
if (err)
goto exit_free;
tdata->attrs[i] = &tdata->sd_attrs[i].dev_attr.attr;
}
return 0;
exit_free:
while (--i >= 0)
device_remove_file(dev, &tdata->sd_attrs[i].dev_attr);
return err;
tdata->attr_group.attrs = tdata->attrs;
return sysfs_create_group(&dev->kobj, &tdata->attr_group);
}
......@@ -548,7 +528,7 @@ static int create_core_data(struct platform_device *pdev, unsigned int cpu,
pdata->core_data[attr_no] = tdata;
/* Create sysfs interfaces */
err = create_core_attrs(tdata, &pdev->dev, attr_no);
err = create_core_attrs(tdata, pdata->hwmon_dev, attr_no);
if (err)
goto exit_free;
......@@ -573,14 +553,12 @@ static void coretemp_add_core(unsigned int cpu, int pkg_flag)
}
static void coretemp_remove_core(struct platform_data *pdata,
struct device *dev, int indx)
int indx)
{
int i;
struct temp_data *tdata = pdata->core_data[indx];
/* Remove the sysfs attributes */
for (i = 0; i < tdata->attr_size; i++)
device_remove_file(dev, &tdata->sd_attrs[i].dev_attr);
sysfs_remove_group(&pdata->hwmon_dev->kobj, &tdata->attr_group);
kfree(pdata->core_data[indx]);
pdata->core_data[indx] = NULL;
......@@ -588,34 +566,20 @@ static void coretemp_remove_core(struct platform_data *pdata,
static int coretemp_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct platform_data *pdata;
int err;
/* Initialize the per-package data structures */
pdata = kzalloc(sizeof(struct platform_data), GFP_KERNEL);
pdata = devm_kzalloc(dev, sizeof(struct platform_data), GFP_KERNEL);
if (!pdata)
return -ENOMEM;
err = create_name_attr(pdata, &pdev->dev);
if (err)
goto exit_free;
pdata->phys_proc_id = pdev->id;
platform_set_drvdata(pdev, pdata);
pdata->hwmon_dev = hwmon_device_register(&pdev->dev);
if (IS_ERR(pdata->hwmon_dev)) {
err = PTR_ERR(pdata->hwmon_dev);
dev_err(&pdev->dev, "Class registration failed (%d)\n", err);
goto exit_name;
}
return 0;
exit_name:
device_remove_file(&pdev->dev, &pdata->name_attr);
exit_free:
kfree(pdata);
return err;
pdata->hwmon_dev = devm_hwmon_device_register_with_groups(dev, DRVNAME,
pdata, NULL);
return PTR_ERR_OR_ZERO(pdata->hwmon_dev);
}
static int coretemp_remove(struct platform_device *pdev)
......@@ -625,11 +589,8 @@ static int coretemp_remove(struct platform_device *pdev)
for (i = MAX_CORE_DATA - 1; i >= 0; --i)
if (pdata->core_data[i])
coretemp_remove_core(pdata, &pdev->dev, i);
coretemp_remove_core(pdata, i);
device_remove_file(&pdev->dev, &pdata->name_attr);
hwmon_device_unregister(pdata->hwmon_dev);
kfree(pdata);
return 0;
}
......@@ -777,7 +738,7 @@ static void put_core_offline(unsigned int cpu)
return;
if (pdata->core_data[indx] && pdata->core_data[indx]->cpu == cpu)
coretemp_remove_core(pdata, &pdev->dev, indx);
coretemp_remove_core(pdata, indx);
/*
* If a HT sibling of a core is taken offline, but another HT sibling
......
drivers/hwmon/emc2103.c
浏览文件 @ 26f31fb9
......@@ -349,7 +349,7 @@ static ssize_t set_fan_div(struct device *dev, struct device_attribute *da,
dev_dbg(&client->dev, "reg 0x%02x, err %d\n",
REG_FAN_CONF1, status);
mutex_unlock(&data->update_lock);
return -EIO;
return status;
}
status &= 0x9F;
status |= (new_range_bits << 5);
......
drivers/hwmon/hwmon.c
浏览文件 @ 26f31fb9
......@@ -22,6 +22,7 @@
#include <linux/gfp.h>
#include <linux/spinlock.h>
#include <linux/pci.h>
#include <linux/string.h>
#define HWMON_ID_PREFIX "hwmon"
#define HWMON_ID_FORMAT HWMON_ID_PREFIX "%d"
......@@ -99,6 +100,10 @@ hwmon_device_register_with_groups(struct device *dev, const char *name,
struct hwmon_device *hwdev;
int err, id;
/* Do not accept invalid characters in hwmon name attribute */
if (name && (!strlen(name) || strpbrk(name, "-* \t\n")))
return ERR_PTR(-EINVAL);
id = ida_simple_get(&hwmon_ida, 0, 0, GFP_KERNEL);
if (id < 0)
return ERR_PTR(id);
......
drivers/hwmon/iio_hwmon.c
浏览文件 @ 26f31fb9
......@@ -31,6 +31,7 @@ struct iio_hwmon_state {
int num_channels;
struct device *hwmon_dev;
struct attribute_group attr_group;
const struct attribute_group *groups[2];
struct attribute **attrs;
};
......@@ -56,19 +57,6 @@ static ssize_t iio_hwmon_read_val(struct device *dev,
return sprintf(buf, "%d\n", result);
}
static ssize_t show_name(struct device *dev, struct device_attribute *attr,
char *buf)
{
const char *name = "iio_hwmon";
if (dev->of_node && dev->of_node->name)
name = dev->of_node->name;
return sprintf(buf, "%s\n", name);
}
static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
static int iio_hwmon_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
......@@ -78,6 +66,10 @@ static int iio_hwmon_probe(struct platform_device *pdev)
int in_i = 1, temp_i = 1, curr_i = 1;
enum iio_chan_type type;
struct iio_channel *channels;
const char *name = "iio_hwmon";
if (dev->of_node && dev->of_node->name)
name = dev->of_node->name;
channels = iio_channel_get_all(dev);
if (IS_ERR(channels))
......@@ -96,7 +88,7 @@ static int iio_hwmon_probe(struct platform_device *pdev)
st->num_channels++;
st->attrs = devm_kzalloc(dev,
sizeof(*st->attrs) * (st->num_channels + 2),
sizeof(*st->attrs) * (st->num_channels + 1),
GFP_KERNEL);
if (st->attrs == NULL) {
ret = -ENOMEM;
......@@ -144,22 +136,18 @@ static int iio_hwmon_probe(struct platform_device *pdev)
a->index = i;
st->attrs[i] = &a->dev_attr.attr;
}
st->attrs[st->num_channels] = &dev_attr_name.attr;
st->attr_group.attrs = st->attrs;
platform_set_drvdata(pdev, st);
ret = sysfs_create_group(&dev->kobj, &st->attr_group);
if (ret < 0)
goto error_release_channels;
st->hwmon_dev = hwmon_device_register(dev);
st->attr_group.attrs = st->attrs;
st->groups[0] = &st->attr_group;
st->hwmon_dev = hwmon_device_register_with_groups(dev, name, st,
st->groups);
if (IS_ERR(st->hwmon_dev)) {
ret = PTR_ERR(st->hwmon_dev);
goto error_remove_group;
goto error_release_channels;
}
platform_set_drvdata(pdev, st);
return 0;
error_remove_group:
sysfs_remove_group(&dev->kobj, &st->attr_group);
error_release_channels:
iio_channel_release_all(channels);
return ret;
......@@ -170,7 +158,6 @@ static int iio_hwmon_remove(struct platform_device *pdev)
struct iio_hwmon_state *st = platform_get_drvdata(pdev);
hwmon_device_unregister(st->hwmon_dev);
sysfs_remove_group(&pdev->dev.kobj, &st->attr_group);
iio_channel_release_all(st->channels);
return 0;
......
drivers/hwmon/jz4740-hwmon.c
浏览文件 @ 26f31fb9
......@@ -28,7 +28,6 @@
#include <linux/hwmon.h>
struct jz4740_hwmon {
struct resource *mem;
void __iomem *base;
int irq;
......@@ -106,6 +105,7 @@ static int jz4740_hwmon_probe(struct platform_device *pdev)
{
int ret;
struct jz4740_hwmon *hwmon;
struct resource *mem;
hwmon = devm_kzalloc(&pdev->dev, sizeof(*hwmon), GFP_KERNEL);
if (!hwmon)
......@@ -120,25 +120,10 @@ static int jz4740_hwmon_probe(struct platform_device *pdev)
return hwmon->irq;
}
hwmon->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!hwmon->mem) {
dev_err(&pdev->dev, "Failed to get platform mmio resource\n");
return -ENOENT;
}
hwmon->mem = devm_request_mem_region(&pdev->dev, hwmon->mem->start,
resource_size(hwmon->mem), pdev->name);
if (!hwmon->mem) {
dev_err(&pdev->dev, "Failed to request mmio memory region\n");
return -EBUSY;
}
hwmon->base = devm_ioremap_nocache(&pdev->dev, hwmon->mem->start,
resource_size(hwmon->mem));
if (!hwmon->base) {
dev_err(&pdev->dev, "Failed to ioremap mmio memory\n");
return -EBUSY;
}
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
hwmon->base = devm_ioremap_resource(&pdev->dev, mem);
if (IS_ERR(hwmon->base))
return PTR_ERR(hwmon->base);
init_completion(&hwmon->read_completion);
mutex_init(&hwmon->lock);
......
drivers/hwmon/lm95241.c
浏览文件 @ 26f31fb9
......@@ -89,7 +89,7 @@ static const u8 lm95241_reg_address[] = {
/* Client data (each client gets its own) */
struct lm95241_data {
struct device *hwmon_dev;
struct i2c_client *client;
struct mutex update_lock;
unsigned long last_updated, interval; /* in jiffies */
char valid; /* zero until following fields are valid */
......@@ -113,8 +113,8 @@ static int temp_from_reg_unsigned(u8 val_h, u8 val_l)
static struct lm95241_data *lm95241_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm95241_data *data = i2c_get_clientdata(client);
struct lm95241_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
mutex_lock(&data->update_lock);
......@@ -122,7 +122,7 @@ static struct lm95241_data *lm95241_update_device(struct device *dev)
!data->valid) {
int i;
dev_dbg(&client->dev, "Updating lm95241 data.\n");
dev_dbg(dev, "Updating lm95241 data.\n");
for (i = 0; i < ARRAY_SIZE(lm95241_reg_address); i++)
data->temp[i]
= i2c_smbus_read_byte_data(client,
......@@ -153,8 +153,7 @@ static ssize_t show_input(struct device *dev, struct device_attribute *attr,
static ssize_t show_type(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm95241_data *data = i2c_get_clientdata(client);
struct lm95241_data *data = dev_get_drvdata(dev);
return snprintf(buf, PAGE_SIZE - 1,
data->model & to_sensor_dev_attr(attr)->index ? "1\n" : "2\n");
......@@ -163,8 +162,8 @@ static ssize_t show_type(struct device *dev, struct device_attribute *attr,
static ssize_t set_type(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm95241_data *data = i2c_get_clientdata(client);
struct lm95241_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
unsigned long val;
int shift;
u8 mask = to_sensor_dev_attr(attr)->index;
......@@ -201,8 +200,7 @@ static ssize_t set_type(struct device *dev, struct device_attribute *attr,
static ssize_t show_min(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm95241_data *data = i2c_get_clientdata(client);
struct lm95241_data *data = dev_get_drvdata(dev);
return snprintf(buf, PAGE_SIZE - 1,
data->config & to_sensor_dev_attr(attr)->index ?
......@@ -212,8 +210,7 @@ static ssize_t show_min(struct device *dev, struct device_attribute *attr,
static ssize_t set_min(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm95241_data *data = i2c_get_clientdata(client);
struct lm95241_data *data = dev_get_drvdata(dev);
long val;
if (kstrtol(buf, 10, &val) < 0)
......@@ -229,7 +226,8 @@ static ssize_t set_min(struct device *dev, struct device_attribute *attr,
data->config &= ~to_sensor_dev_attr(attr)->index;
data->valid = 0;
i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG, data->config);
i2c_smbus_write_byte_data(data->client, LM95241_REG_RW_CONFIG,
data->config);
mutex_unlock(&data->update_lock);
......@@ -239,8 +237,7 @@ static ssize_t set_min(struct device *dev, struct device_attribute *attr,
static ssize_t show_max(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm95241_data *data = i2c_get_clientdata(client);
struct lm95241_data *data = dev_get_drvdata(dev);
return snprintf(buf, PAGE_SIZE - 1,
data->config & to_sensor_dev_attr(attr)->index ?
......@@ -250,8 +247,7 @@ static ssize_t show_max(struct device *dev, struct device_attribute *attr,
static ssize_t set_max(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm95241_data *data = i2c_get_clientdata(client);
struct lm95241_data *data = dev_get_drvdata(dev);
long val;
if (kstrtol(buf, 10, &val) < 0)
......@@ -267,7 +263,8 @@ static ssize_t set_max(struct device *dev, struct device_attribute *attr,
data->config &= ~to_sensor_dev_attr(attr)->index;
data->valid = 0;
i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG, data->config);
i2c_smbus_write_byte_data(data->client, LM95241_REG_RW_CONFIG,
data->config);
mutex_unlock(&data->update_lock);
......@@ -286,8 +283,7 @@ static ssize_t show_interval(struct device *dev, struct device_attribute *attr,
static ssize_t set_interval(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm95241_data *data = i2c_get_clientdata(client);
struct lm95241_data *data = dev_get_drvdata(dev);
unsigned long val;
if (kstrtoul(buf, 10, &val) < 0)
......@@ -316,7 +312,7 @@ static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_max, set_max,
static DEVICE_ATTR(update_interval, S_IWUSR | S_IRUGO, show_interval,
set_interval);
static struct attribute *lm95241_attributes[] = {
static struct attribute *lm95241_attrs[] = {
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp2_input.dev_attr.attr,
&sensor_dev_attr_temp3_input.dev_attr.attr,
......@@ -329,10 +325,7 @@ static struct attribute *lm95241_attributes[] = {
&dev_attr_update_interval.attr,
NULL
};
static const struct attribute_group lm95241_group = {
.attrs = lm95241_attributes,
};
ATTRIBUTE_GROUPS(lm95241);
/* Return 0 if detection is successful, -ENODEV otherwise */
static int lm95241_detect(struct i2c_client *new_client,
......@@ -366,14 +359,11 @@ static int lm95241_detect(struct i2c_client *new_client,
return 0;
}
static void lm95241_init_client(struct i2c_client *client)
static void lm95241_init_client(struct i2c_client *client,
struct lm95241_data *data)
{
struct lm95241_data *data = i2c_get_clientdata(client);
data->interval = HZ; /* 1 sec default */
data->valid = 0;
data->config = CFG_CR0076;
data->model = 0;
data->trutherm = (TT_OFF << TT1_SHIFT) | (TT_OFF << TT2_SHIFT);
i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG, data->config);
......@@ -385,49 +375,27 @@ static void lm95241_init_client(struct i2c_client *client)
data->model);
}
static int lm95241_probe(struct i2c_client *new_client,
static int lm95241_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct device *dev = &client->dev;
struct lm95241_data *data;
int err;
struct device *hwmon_dev;
data = devm_kzalloc(&new_client->dev, sizeof(struct lm95241_data),
GFP_KERNEL);
data = devm_kzalloc(dev, sizeof(struct lm95241_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
i2c_set_clientdata(new_client, data);
data->client = client;
mutex_init(&data->update_lock);
/* Initialize the LM95241 chip */
lm95241_init_client(new_client);
lm95241_init_client(client, data);
/* Register sysfs hooks */
err = sysfs_create_group(&new_client->dev.kobj, &lm95241_group);
if (err)
return err;
data->hwmon_dev = hwmon_device_register(&new_client->dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
goto exit_remove_files;
}
return 0;
exit_remove_files:
sysfs_remove_group(&new_client->dev.kobj, &lm95241_group);
return err;
}
static int lm95241_remove(struct i2c_client *client)
{
struct lm95241_data *data = i2c_get_clientdata(client);
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &lm95241_group);
return 0;
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
data,
lm95241_groups);
return PTR_ERR_OR_ZERO(hwmon_dev);
}
/* Driver data (common to all clients) */
......@@ -444,7 +412,6 @@ static struct i2c_driver lm95241_driver = {
.name = DEVNAME,
},
.probe = lm95241_probe,
.remove = lm95241_remove,
.id_table = lm95241_id,
.detect = lm95241_detect,
.address_list = normal_i2c,
......
drivers/hwmon/lm95245.c
浏览文件 @ 26f31fb9
......@@ -115,7 +115,7 @@ static const u8 lm95245_reg_address[] = {
/* Client data (each client gets its own) */
struct lm95245_data {
struct device *hwmon_dev;
struct i2c_client *client;
struct mutex update_lock;
unsigned long last_updated; /* in jiffies */
unsigned long interval; /* in msecs */
......@@ -140,8 +140,8 @@ static int temp_from_reg_signed(u8 val_h, u8 val_l)
static struct lm95245_data *lm95245_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm95245_data *data = i2c_get_clientdata(client);
struct lm95245_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
mutex_lock(&data->update_lock);
......@@ -149,7 +149,6 @@ static struct lm95245_data *lm95245_update_device(struct device *dev)
+ msecs_to_jiffies(data->interval)) || !data->valid) {
int i;
dev_dbg(&client->dev, "Updating lm95245 data.\n");
for (i = 0; i < ARRAY_SIZE(lm95245_reg_address); i++)
data->regs[i]
= i2c_smbus_read_byte_data(client,
......@@ -249,9 +248,9 @@ static ssize_t show_limit(struct device *dev, struct device_attribute *attr,
static ssize_t set_limit(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm95245_data *data = i2c_get_clientdata(client);
struct lm95245_data *data = dev_get_drvdata(dev);
int index = to_sensor_dev_attr(attr)->index;
struct i2c_client *client = data->client;
unsigned long val;
if (kstrtoul(buf, 10, &val) < 0)
......@@ -272,27 +271,38 @@ static ssize_t set_limit(struct device *dev, struct device_attribute *attr,
return count;
}
static ssize_t show_crit_hyst(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct lm95245_data *data = lm95245_update_device(dev);
int index = to_sensor_dev_attr(attr)->index;
int hyst = data->regs[index] - data->regs[8];
return snprintf(buf, PAGE_SIZE - 1, "%d\n", hyst * 1000);
}
static ssize_t set_crit_hyst(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm95245_data *data = i2c_get_clientdata(client);
struct lm95245_data *data = dev_get_drvdata(dev);
int index = to_sensor_dev_attr(attr)->index;
struct i2c_client *client = data->client;
unsigned long val;
int hyst, limit;
if (kstrtoul(buf, 10, &val) < 0)
return -EINVAL;
val /= 1000;
val = clamp_val(val, 0, 31);
mutex_lock(&data->update_lock);
data->valid = 0;
limit = i2c_smbus_read_byte_data(client, lm95245_reg_address[index]);
hyst = limit - val / 1000;
hyst = clamp_val(hyst, 0, 31);
data->regs[8] = hyst;
/* shared crit hysteresis */
i2c_smbus_write_byte_data(client, LM95245_REG_RW_COMMON_HYSTERESIS,
val);
hyst);
mutex_unlock(&data->update_lock);
......@@ -302,8 +312,7 @@ static ssize_t set_crit_hyst(struct device *dev, struct device_attribute *attr,
static ssize_t show_type(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm95245_data *data = i2c_get_clientdata(client);
struct lm95245_data *data = dev_get_drvdata(dev);
return snprintf(buf, PAGE_SIZE - 1,
data->config2 & CFG2_REMOTE_TT ? "1\n" : "2\n");
......@@ -312,8 +321,8 @@ static ssize_t show_type(struct device *dev, struct device_attribute *attr,
static ssize_t set_type(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm95245_data *data = i2c_get_clientdata(client);
struct lm95245_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
unsigned long val;
if (kstrtoul(buf, 10, &val) < 0)
......@@ -359,8 +368,8 @@ static ssize_t show_interval(struct device *dev, struct device_attribute *attr,
static ssize_t set_interval(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm95245_data *data = i2c_get_clientdata(client);
struct lm95245_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
unsigned long val;
if (kstrtoul(buf, 10, &val) < 0)
......@@ -378,16 +387,15 @@ static ssize_t set_interval(struct device *dev, struct device_attribute *attr,
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_input, NULL, 0);
static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_limit,
set_limit, 6);
static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_limit,
set_crit_hyst, 8);
static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_crit_hyst,
set_crit_hyst, 6);
static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL,
STATUS1_LOC);
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_input, NULL, 2);
static SENSOR_DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_limit,
set_limit, 7);
static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_limit,
set_crit_hyst, 8);
static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_crit_hyst, NULL, 7);
static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL,
STATUS1_RTCRIT);
static SENSOR_DEVICE_ATTR(temp2_type, S_IWUSR | S_IRUGO, show_type,
......@@ -398,7 +406,7 @@ static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL,
static DEVICE_ATTR(update_interval, S_IWUSR | S_IRUGO, show_interval,
set_interval);
static struct attribute *lm95245_attributes[] = {
static struct attribute *lm95245_attrs[] = {
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp1_crit.dev_attr.attr,
&sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
......@@ -412,10 +420,7 @@ static struct attribute *lm95245_attributes[] = {
&dev_attr_update_interval.attr,
NULL
};
static const struct attribute_group lm95245_group = {
.attrs = lm95245_attributes,
};
ATTRIBUTE_GROUPS(lm95245);
/* Return 0 if detection is successful, -ENODEV otherwise */
static int lm95245_detect(struct i2c_client *new_client,
......@@ -436,11 +441,9 @@ static int lm95245_detect(struct i2c_client *new_client,
return 0;
}
static void lm95245_init_client(struct i2c_client *client)
static void lm95245_init_client(struct i2c_client *client,
struct lm95245_data *data)
{
struct lm95245_data *data = i2c_get_clientdata(client);
data->valid = 0;
data->interval = lm95245_read_conversion_rate(client);
data->config1 = i2c_smbus_read_byte_data(client,
......@@ -456,49 +459,27 @@ static void lm95245_init_client(struct i2c_client *client)
}
}
static int lm95245_probe(struct i2c_client *new_client,
static int lm95245_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct device *dev = &client->dev;
struct lm95245_data *data;
int err;
struct device *hwmon_dev;
data = devm_kzalloc(&new_client->dev, sizeof(struct lm95245_data),
GFP_KERNEL);
data = devm_kzalloc(dev, sizeof(struct lm95245_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
i2c_set_clientdata(new_client, data);
data->client = client;
mutex_init(&data->update_lock);
/* Initialize the LM95245 chip */
lm95245_init_client(new_client);
/* Register sysfs hooks */
err = sysfs_create_group(&new_client->dev.kobj, &lm95245_group);
if (err)
return err;
data->hwmon_dev = hwmon_device_register(&new_client->dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
goto exit_remove_files;
}
return 0;
exit_remove_files:
sysfs_remove_group(&new_client->dev.kobj, &lm95245_group);
return err;
}
lm95245_init_client(client, data);
static int lm95245_remove(struct i2c_client *client)
{
struct lm95245_data *data = i2c_get_clientdata(client);
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &lm95245_group);
return 0;
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
data,
lm95245_groups);
return PTR_ERR_OR_ZERO(hwmon_dev);
}
/* Driver data (common to all clients) */
......@@ -514,7 +495,6 @@ static struct i2c_driver lm95245_driver = {
.name = DEVNAME,
},
.probe = lm95245_probe,
.remove = lm95245_remove,
.id_table = lm95245_id,
.detect = lm95245_detect,
.address_list = normal_i2c,
......
drivers/hwmon/ltc2945.c 0 → 100644
浏览文件 @ 26f31fb9
/*
* Driver for Linear Technology LTC2945 I2C Power Monitor
*
* Copyright (c) 2014 Guenter Roeck
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/jiffies.h>
#include <linux/regmap.h>
/* chip registers */
#define LTC2945_CONTROL 0x00
#define LTC2945_ALERT 0x01
#define LTC2945_STATUS 0x02
#define LTC2945_FAULT 0x03
#define LTC2945_POWER_H 0x05
#define LTC2945_MAX_POWER_H 0x08
#define LTC2945_MIN_POWER_H 0x0b
#define LTC2945_MAX_POWER_THRES_H 0x0e
#define LTC2945_MIN_POWER_THRES_H 0x11
#define LTC2945_SENSE_H 0x14
#define LTC2945_MAX_SENSE_H 0x16
#define LTC2945_MIN_SENSE_H 0x18
#define LTC2945_MAX_SENSE_THRES_H 0x1a
#define LTC2945_MIN_SENSE_THRES_H 0x1c
#define LTC2945_VIN_H 0x1e
#define LTC2945_MAX_VIN_H 0x20
#define LTC2945_MIN_VIN_H 0x22
#define LTC2945_MAX_VIN_THRES_H 0x24
#define LTC2945_MIN_VIN_THRES_H 0x26
#define LTC2945_ADIN_H 0x28
#define LTC2945_MAX_ADIN_H 0x2a
#define LTC2945_MIN_ADIN_H 0x2c
#define LTC2945_MAX_ADIN_THRES_H 0x2e
#define LTC2945_MIN_ADIN_THRES_H 0x30
#define LTC2945_MIN_ADIN_THRES_L 0x31
/* Fault register bits */
#define FAULT_ADIN_UV (1 << 0)
#define FAULT_ADIN_OV (1 << 1)
#define FAULT_VIN_UV (1 << 2)
#define FAULT_VIN_OV (1 << 3)
#define FAULT_SENSE_UV (1 << 4)
#define FAULT_SENSE_OV (1 << 5)
#define FAULT_POWER_UV (1 << 6)
#define FAULT_POWER_OV (1 << 7)
/* Control register bits */
#define CONTROL_MULT_SELECT (1 << 0)
#define CONTROL_TEST_MODE (1 << 4)
static inline bool is_power_reg(u8 reg)
{
return reg < LTC2945_SENSE_H;
}
/* Return the value from the given register in uW, mV, or mA */
static long long ltc2945_reg_to_val(struct device *dev, u8 reg)
{
struct regmap *regmap = dev_get_drvdata(dev);
unsigned int control;
u8 buf[3];
long long val;
int ret;
ret = regmap_bulk_read(regmap, reg, buf,
is_power_reg(reg) ? 3 : 2);
if (ret < 0)
return ret;
if (is_power_reg(reg)) {
/* power */
val = (buf[0] << 16) + (buf[1] << 8) + buf[2];
} else {
/* current, voltage */
val = (buf[0] << 4) + (buf[1] >> 4);
}
switch (reg) {
case LTC2945_POWER_H:
case LTC2945_MAX_POWER_H:
case LTC2945_MIN_POWER_H:
case LTC2945_MAX_POWER_THRES_H:
case LTC2945_MIN_POWER_THRES_H:
/*
* Convert to uW by assuming current is measured with
* an 1mOhm sense resistor, similar to current
* measurements.
* Control register bit 0 selects if voltage at SENSE+/VDD
* or voltage at ADIN is used to measure power.
*/
ret = regmap_read(regmap, LTC2945_CONTROL, &control);
if (ret < 0)
return ret;
if (control & CONTROL_MULT_SELECT) {
/* 25 mV * 25 uV = 0.625 uV resolution. */
val *= 625LL;
} else {
/* 0.5 mV * 25 uV = 0.0125 uV resolution. */
val = (val * 25LL) >> 1;
}
break;
case LTC2945_VIN_H:
case LTC2945_MAX_VIN_H:
case LTC2945_MIN_VIN_H:
case LTC2945_MAX_VIN_THRES_H:
case LTC2945_MIN_VIN_THRES_H:
/* 25 mV resolution. Convert to mV. */
val *= 25;
break;
case LTC2945_ADIN_H:
case LTC2945_MAX_ADIN_H:
case LTC2945_MIN_ADIN_THRES_H:
case LTC2945_MAX_ADIN_THRES_H:
case LTC2945_MIN_ADIN_H:
/* 0.5mV resolution. Convert to mV. */
val = val >> 1;
break;
case LTC2945_SENSE_H:
case LTC2945_MAX_SENSE_H:
case LTC2945_MIN_SENSE_H:
case LTC2945_MAX_SENSE_THRES_H:
case LTC2945_MIN_SENSE_THRES_H:
/*
* 25 uV resolution. Convert to current as measured with
* an 1 mOhm sense resistor, in mA. If a different sense
* resistor is installed, calculate the actual current by
* dividing the reported current by the sense resistor value
* in mOhm.
*/
val *= 25;
break;
default:
return -EINVAL;
}
return val;
}
static int ltc2945_val_to_reg(struct device *dev, u8 reg,
unsigned long val)
{
struct regmap *regmap = dev_get_drvdata(dev);
unsigned int control;
int ret;
switch (reg) {
case LTC2945_POWER_H:
case LTC2945_MAX_POWER_H:
case LTC2945_MIN_POWER_H:
case LTC2945_MAX_POWER_THRES_H:
case LTC2945_MIN_POWER_THRES_H:
/*
* Convert to register value by assuming current is measured
* with an 1mOhm sense resistor, similar to current
* measurements.
* Control register bit 0 selects if voltage at SENSE+/VDD
* or voltage at ADIN is used to measure power, which in turn
* determines register calculations.
*/
ret = regmap_read(regmap, LTC2945_CONTROL, &control);
if (ret < 0)
return ret;
if (control & CONTROL_MULT_SELECT) {
/* 25 mV * 25 uV = 0.625 uV resolution. */
val = DIV_ROUND_CLOSEST(val, 625);
} else {
/*
* 0.5 mV * 25 uV = 0.0125 uV resolution.
* Divide first to avoid overflow;
* accept loss of accuracy.
*/
val = DIV_ROUND_CLOSEST(val, 25) * 2;
}
break;
case LTC2945_VIN_H:
case LTC2945_MAX_VIN_H:
case LTC2945_MIN_VIN_H:
case LTC2945_MAX_VIN_THRES_H:
case LTC2945_MIN_VIN_THRES_H:
/* 25 mV resolution. */
val /= 25;
break;
case LTC2945_ADIN_H:
case LTC2945_MAX_ADIN_H:
case LTC2945_MIN_ADIN_THRES_H:
case LTC2945_MAX_ADIN_THRES_H:
case LTC2945_MIN_ADIN_H:
/* 0.5mV resolution. */
val *= 2;
break;
case LTC2945_SENSE_H:
case LTC2945_MAX_SENSE_H:
case LTC2945_MIN_SENSE_H:
case LTC2945_MAX_SENSE_THRES_H:
case LTC2945_MIN_SENSE_THRES_H:
/*
* 25 uV resolution. Convert to current as measured with
* an 1 mOhm sense resistor, in mA. If a different sense
* resistor is installed, calculate the actual current by
* dividing the reported current by the sense resistor value
* in mOhm.
*/
val = DIV_ROUND_CLOSEST(val, 25);
break;
default:
return -EINVAL;
}
return val;
}
static ssize_t ltc2945_show_value(struct device *dev,
struct device_attribute *da, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
long long value;
value = ltc2945_reg_to_val(dev, attr->index);
if (value < 0)
return value;
return snprintf(buf, PAGE_SIZE, "%lld\n", value);
}
static ssize_t ltc2945_set_value(struct device *dev,
struct device_attribute *da,
const char *buf, size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
struct regmap *regmap = dev_get_drvdata(dev);
u8 reg = attr->index;
unsigned long val;
u8 regbuf[3];
int num_regs;
int regval;
int ret;
ret = kstrtoul(buf, 10, &val);
if (ret)
return ret;
/* convert to register value, then clamp and write result */
regval = ltc2945_val_to_reg(dev, reg, val);
if (is_power_reg(reg)) {
regval = clamp_val(regval, 0, 0xffffff);
regbuf[0] = regval >> 16;
regbuf[1] = (regval >> 8) & 0xff;
regbuf[2] = regval;
num_regs = 3;
} else {
regval = clamp_val(regval, 0, 0xfff) << 4;
regbuf[0] = regval >> 8;
regbuf[1] = regval & 0xff;
num_regs = 2;
}
ret = regmap_bulk_write(regmap, reg, regbuf, num_regs);
return ret < 0 ? ret : count;
}
static ssize_t ltc2945_reset_history(struct device *dev,
struct device_attribute *da,
const char *buf, size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
struct regmap *regmap = dev_get_drvdata(dev);
u8 reg = attr->index;
int num_regs = is_power_reg(reg) ? 3 : 2;
u8 buf_min[3] = { 0xff, 0xff, 0xff };
u8 buf_max[3] = { 0, 0, 0 };
unsigned long val;
int ret;
ret = kstrtoul(buf, 10, &val);
if (ret)
return ret;
if (val != 1)
return -EINVAL;
ret = regmap_update_bits(regmap, LTC2945_CONTROL, CONTROL_TEST_MODE,
CONTROL_TEST_MODE);
/* Reset minimum */
ret = regmap_bulk_write(regmap, reg, buf_min, num_regs);
if (ret)
return ret;
switch (reg) {
case LTC2945_MIN_POWER_H:
reg = LTC2945_MAX_POWER_H;
break;
case LTC2945_MIN_SENSE_H:
reg = LTC2945_MAX_SENSE_H;
break;
case LTC2945_MIN_VIN_H:
reg = LTC2945_MAX_VIN_H;
break;
case LTC2945_MIN_ADIN_H:
reg = LTC2945_MAX_ADIN_H;
break;
default:
BUG();
break;
}
/* Reset maximum */
ret = regmap_bulk_write(regmap, reg, buf_max, num_regs);
/* Try resetting test mode even if there was an error */
regmap_update_bits(regmap, LTC2945_CONTROL, CONTROL_TEST_MODE, 0);
return ret ? : count;
}
static ssize_t ltc2945_show_bool(struct device *dev,
struct device_attribute *da, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
struct regmap *regmap = dev_get_drvdata(dev);
unsigned int fault;
int ret;
ret = regmap_read(regmap, LTC2945_FAULT, &fault);
if (ret < 0)
return ret;
fault &= attr->index;
if (fault) /* Clear reported faults in chip register */
regmap_update_bits(regmap, LTC2945_FAULT, attr->index, 0);
return snprintf(buf, PAGE_SIZE, "%d\n", !!fault);
}
/* Input voltages */
static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, ltc2945_show_value, NULL,
LTC2945_VIN_H);
static SENSOR_DEVICE_ATTR(in1_min, S_IRUGO | S_IWUSR, ltc2945_show_value,
ltc2945_set_value, LTC2945_MIN_VIN_THRES_H);
static SENSOR_DEVICE_ATTR(in1_max, S_IRUGO | S_IWUSR, ltc2945_show_value,
ltc2945_set_value, LTC2945_MAX_VIN_THRES_H);
static SENSOR_DEVICE_ATTR(in1_lowest, S_IRUGO, ltc2945_show_value, NULL,
LTC2945_MIN_VIN_H);
static SENSOR_DEVICE_ATTR(in1_highest, S_IRUGO, ltc2945_show_value, NULL,
LTC2945_MAX_VIN_H);
static SENSOR_DEVICE_ATTR(in1_reset_history, S_IWUSR, NULL,
ltc2945_reset_history, LTC2945_MIN_VIN_H);
static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, ltc2945_show_value, NULL,
LTC2945_ADIN_H);
static SENSOR_DEVICE_ATTR(in2_min, S_IRUGO | S_IWUSR, ltc2945_show_value,
ltc2945_set_value, LTC2945_MIN_ADIN_THRES_H);
static SENSOR_DEVICE_ATTR(in2_max, S_IRUGO | S_IWUSR, ltc2945_show_value,
ltc2945_set_value, LTC2945_MAX_ADIN_THRES_H);
static SENSOR_DEVICE_ATTR(in2_lowest, S_IRUGO, ltc2945_show_value, NULL,
LTC2945_MIN_ADIN_H);
static SENSOR_DEVICE_ATTR(in2_highest, S_IRUGO, ltc2945_show_value, NULL,
LTC2945_MAX_ADIN_H);
static SENSOR_DEVICE_ATTR(in2_reset_history, S_IWUSR, NULL,
ltc2945_reset_history, LTC2945_MIN_ADIN_H);
/* Voltage alarms */
static SENSOR_DEVICE_ATTR(in1_min_alarm, S_IRUGO, ltc2945_show_bool, NULL,
FAULT_VIN_UV);
static SENSOR_DEVICE_ATTR(in1_max_alarm, S_IRUGO, ltc2945_show_bool, NULL,
FAULT_VIN_OV);
static SENSOR_DEVICE_ATTR(in2_min_alarm, S_IRUGO, ltc2945_show_bool, NULL,
FAULT_ADIN_UV);
static SENSOR_DEVICE_ATTR(in2_max_alarm, S_IRUGO, ltc2945_show_bool, NULL,
FAULT_ADIN_OV);
/* Currents (via sense resistor) */
static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, ltc2945_show_value, NULL,
LTC2945_SENSE_H);
static SENSOR_DEVICE_ATTR(curr1_min, S_IRUGO | S_IWUSR, ltc2945_show_value,
ltc2945_set_value, LTC2945_MIN_SENSE_THRES_H);
static SENSOR_DEVICE_ATTR(curr1_max, S_IRUGO | S_IWUSR, ltc2945_show_value,
ltc2945_set_value, LTC2945_MAX_SENSE_THRES_H);
static SENSOR_DEVICE_ATTR(curr1_lowest, S_IRUGO, ltc2945_show_value, NULL,
LTC2945_MIN_SENSE_H);
static SENSOR_DEVICE_ATTR(curr1_highest, S_IRUGO, ltc2945_show_value, NULL,
LTC2945_MAX_SENSE_H);
static SENSOR_DEVICE_ATTR(curr1_reset_history, S_IWUSR, NULL,
ltc2945_reset_history, LTC2945_MIN_SENSE_H);
/* Current alarms */
static SENSOR_DEVICE_ATTR(curr1_min_alarm, S_IRUGO, ltc2945_show_bool, NULL,
FAULT_SENSE_UV);
static SENSOR_DEVICE_ATTR(curr1_max_alarm, S_IRUGO, ltc2945_show_bool, NULL,
FAULT_SENSE_OV);
/* Power */
static SENSOR_DEVICE_ATTR(power1_input, S_IRUGO, ltc2945_show_value, NULL,
LTC2945_POWER_H);
static SENSOR_DEVICE_ATTR(power1_min, S_IRUGO | S_IWUSR, ltc2945_show_value,
ltc2945_set_value, LTC2945_MIN_POWER_THRES_H);
static SENSOR_DEVICE_ATTR(power1_max, S_IRUGO | S_IWUSR, ltc2945_show_value,
ltc2945_set_value, LTC2945_MAX_POWER_THRES_H);
static SENSOR_DEVICE_ATTR(power1_input_lowest, S_IRUGO, ltc2945_show_value,
NULL, LTC2945_MIN_POWER_H);
static SENSOR_DEVICE_ATTR(power1_input_highest, S_IRUGO, ltc2945_show_value,
NULL, LTC2945_MAX_POWER_H);
static SENSOR_DEVICE_ATTR(power1_reset_history, S_IWUSR, NULL,
ltc2945_reset_history, LTC2945_MIN_POWER_H);
/* Power alarms */
static SENSOR_DEVICE_ATTR(power1_min_alarm, S_IRUGO, ltc2945_show_bool, NULL,
FAULT_POWER_UV);
static SENSOR_DEVICE_ATTR(power1_max_alarm, S_IRUGO, ltc2945_show_bool, NULL,
FAULT_POWER_OV);
static struct attribute *ltc2945_attrs[] = {
&sensor_dev_attr_in1_input.dev_attr.attr,
&sensor_dev_attr_in1_min.dev_attr.attr,
&sensor_dev_attr_in1_max.dev_attr.attr,
&sensor_dev_attr_in1_lowest.dev_attr.attr,
&sensor_dev_attr_in1_highest.dev_attr.attr,
&sensor_dev_attr_in1_reset_history.dev_attr.attr,
&sensor_dev_attr_in1_min_alarm.dev_attr.attr,
&sensor_dev_attr_in1_max_alarm.dev_attr.attr,
&sensor_dev_attr_in2_input.dev_attr.attr,
&sensor_dev_attr_in2_min.dev_attr.attr,
&sensor_dev_attr_in2_max.dev_attr.attr,
&sensor_dev_attr_in2_lowest.dev_attr.attr,
&sensor_dev_attr_in2_highest.dev_attr.attr,
&sensor_dev_attr_in2_reset_history.dev_attr.attr,
&sensor_dev_attr_in2_min_alarm.dev_attr.attr,
&sensor_dev_attr_in2_max_alarm.dev_attr.attr,
&sensor_dev_attr_curr1_input.dev_attr.attr,
&sensor_dev_attr_curr1_min.dev_attr.attr,
&sensor_dev_attr_curr1_max.dev_attr.attr,
&sensor_dev_attr_curr1_lowest.dev_attr.attr,
&sensor_dev_attr_curr1_highest.dev_attr.attr,
&sensor_dev_attr_curr1_reset_history.dev_attr.attr,
&sensor_dev_attr_curr1_min_alarm.dev_attr.attr,
&sensor_dev_attr_curr1_max_alarm.dev_attr.attr,
&sensor_dev_attr_power1_input.dev_attr.attr,
&sensor_dev_attr_power1_min.dev_attr.attr,
&sensor_dev_attr_power1_max.dev_attr.attr,
&sensor_dev_attr_power1_input_lowest.dev_attr.attr,
&sensor_dev_attr_power1_input_highest.dev_attr.attr,
&sensor_dev_attr_power1_reset_history.dev_attr.attr,
&sensor_dev_attr_power1_min_alarm.dev_attr.attr,
&sensor_dev_attr_power1_max_alarm.dev_attr.attr,
NULL,
};
ATTRIBUTE_GROUPS(ltc2945);
static struct regmap_config ltc2945_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = LTC2945_MIN_ADIN_THRES_L,
};
static int ltc2945_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct device *dev = &client->dev;
struct device *hwmon_dev;
struct regmap *regmap;
regmap = devm_regmap_init_i2c(client, &ltc2945_regmap_config);
if (IS_ERR(regmap)) {
dev_err(dev, "failed to allocate register map\n");
return PTR_ERR(regmap);
}
/* Clear faults */
regmap_write(regmap, LTC2945_FAULT, 0x00);
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
regmap,
ltc2945_groups);
return PTR_ERR_OR_ZERO(hwmon_dev);
}
static const struct i2c_device_id ltc2945_id[] = {
{"ltc2945", 0},
{ }
};
MODULE_DEVICE_TABLE(i2c, ltc2945_id);
static struct i2c_driver ltc2945_driver = {
.driver = {
.name = "ltc2945",
},
.probe = ltc2945_probe,
.id_table = ltc2945_id,
};
module_i2c_driver(ltc2945_driver);
MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
MODULE_DESCRIPTION("LTC2945 driver");
MODULE_LICENSE("GPL");
drivers/hwmon/ltc4215.c
浏览文件 @ 26f31fb9
......@@ -33,7 +33,7 @@ enum ltc4215_cmd {
};
struct ltc4215_data {
struct device *hwmon_dev;
struct i2c_client *client;
struct mutex update_lock;
bool valid;
......@@ -45,8 +45,8 @@ struct ltc4215_data {
static struct ltc4215_data *ltc4215_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct ltc4215_data *data = i2c_get_clientdata(client);
struct ltc4215_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
s32 val;
int i;
......@@ -214,7 +214,7 @@ static SENSOR_DEVICE_ATTR(in2_min_alarm, S_IRUGO, ltc4215_show_alarm, NULL,
* Finally, construct an array of pointers to members of the above objects,
* as required for sysfs_create_group()
*/
static struct attribute *ltc4215_attributes[] = {
static struct attribute *ltc4215_attrs[] = {
&sensor_dev_attr_curr1_input.dev_attr.attr,
&sensor_dev_attr_curr1_max_alarm.dev_attr.attr,
......@@ -229,57 +229,33 @@ static struct attribute *ltc4215_attributes[] = {
NULL,
};
static const struct attribute_group ltc4215_group = {
.attrs = ltc4215_attributes,
};
ATTRIBUTE_GROUPS(ltc4215);
static int ltc4215_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct i2c_adapter *adapter = client->adapter;
struct device *dev = &client->dev;
struct ltc4215_data *data;
int ret;
struct device *hwmon_dev;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
i2c_set_clientdata(client, data);
data->client = client;
mutex_init(&data->update_lock);
/* Initialize the LTC4215 chip */
i2c_smbus_write_byte_data(client, LTC4215_FAULT, 0x00);
/* Register sysfs hooks */
ret = sysfs_create_group(&client->dev.kobj, &ltc4215_group);
if (ret)
return ret;
data->hwmon_dev = hwmon_device_register(&client->dev);
if (IS_ERR(data->hwmon_dev)) {
ret = PTR_ERR(data->hwmon_dev);
goto out_hwmon_device_register;
}
return 0;
out_hwmon_device_register:
sysfs_remove_group(&client->dev.kobj, &ltc4215_group);
return ret;
}
static int ltc4215_remove(struct i2c_client *client)
{
struct ltc4215_data *data = i2c_get_clientdata(client);
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &ltc4215_group);
return 0;
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
data,
ltc4215_groups);
return PTR_ERR_OR_ZERO(hwmon_dev);
}
static const struct i2c_device_id ltc4215_id[] = {
......@@ -294,7 +270,6 @@ static struct i2c_driver ltc4215_driver = {
.name = "ltc4215",
},
.probe = ltc4215_probe,
.remove = ltc4215_remove,
.id_table = ltc4215_id,
};
......
drivers/hwmon/ltc4222.c 0 → 100644
浏览文件 @ 26f31fb9
/*
* Driver for Linear Technology LTC4222 Dual Hot Swap controller
*
* Copyright (c) 2014 Guenter Roeck
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/bitops.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/jiffies.h>
#include <linux/regmap.h>
/* chip registers */
#define LTC4222_CONTROL1 0xd0
#define LTC4222_ALERT1 0xd1
#define LTC4222_STATUS1 0xd2
#define LTC4222_FAULT1 0xd3
#define LTC4222_CONTROL2 0xd4
#define LTC4222_ALERT2 0xd5
#define LTC4222_STATUS2 0xd6
#define LTC4222_FAULT2 0xd7
#define LTC4222_SOURCE1 0xd8
#define LTC4222_SOURCE2 0xda
#define LTC4222_ADIN1 0xdc
#define LTC4222_ADIN2 0xde
#define LTC4222_SENSE1 0xe0
#define LTC4222_SENSE2 0xe2
#define LTC4222_ADC_CONTROL 0xe4
/*
* Fault register bits
*/
#define FAULT_OV BIT(0)
#define FAULT_UV BIT(1)
#define FAULT_OC BIT(2)
#define FAULT_POWER_BAD BIT(3)
#define FAULT_FET_BAD BIT(5)
/* Return the voltage from the given register in mV or mA */
static int ltc4222_get_value(struct device *dev, u8 reg)
{
struct regmap *regmap = dev_get_drvdata(dev);
unsigned int val;
u8 buf[2];
int ret;
ret = regmap_bulk_read(regmap, reg, buf, 2);
if (ret < 0)
return ret;
val = ((buf[0] << 8) + buf[1]) >> 6;
switch (reg) {
case LTC4222_ADIN1:
case LTC4222_ADIN2:
/* 1.25 mV resolution. Convert to mV. */
val = DIV_ROUND_CLOSEST(val * 5, 4);
break;
case LTC4222_SOURCE1:
case LTC4222_SOURCE2:
/* 31.25 mV resolution. Convert to mV. */
val = DIV_ROUND_CLOSEST(val * 125, 4);
break;
case LTC4222_SENSE1:
case LTC4222_SENSE2:
/*
* 62.5 uV resolution. Convert to current as measured with
* an 1 mOhm sense resistor, in mA. If a different sense
* resistor is installed, calculate the actual current by
* dividing the reported current by the sense resistor value
* in mOhm.
*/
val = DIV_ROUND_CLOSEST(val * 125, 2);
break;
default:
return -EINVAL;
}
return val;
}
static ssize_t ltc4222_show_value(struct device *dev,
struct device_attribute *da, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
int value;
value = ltc4222_get_value(dev, attr->index);
if (value < 0)
return value;
return snprintf(buf, PAGE_SIZE, "%d\n", value);
}
static ssize_t ltc4222_show_bool(struct device *dev,
struct device_attribute *da, char *buf)
{
struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(da);
struct regmap *regmap = dev_get_drvdata(dev);
unsigned int fault;
int ret;
ret = regmap_read(regmap, attr->nr, &fault);
if (ret < 0)
return ret;
fault &= attr->index;
if (fault) /* Clear reported faults in chip register */
regmap_update_bits(regmap, attr->nr, attr->index, 0);
return snprintf(buf, PAGE_SIZE, "%d\n", !!fault);
}
/* Voltages */
static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, ltc4222_show_value, NULL,
LTC4222_SOURCE1);
static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, ltc4222_show_value, NULL,
LTC4222_ADIN1);
static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, ltc4222_show_value, NULL,
LTC4222_SOURCE2);
static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, ltc4222_show_value, NULL,
LTC4222_ADIN2);
/*
* Voltage alarms
* UV/OV faults are associated with the input voltage, and power bad and fet
* faults are associated with the output voltage.
*/
static SENSOR_DEVICE_ATTR_2(in1_min_alarm, S_IRUGO, ltc4222_show_bool, NULL,
LTC4222_FAULT1, FAULT_UV);
static SENSOR_DEVICE_ATTR_2(in1_max_alarm, S_IRUGO, ltc4222_show_bool, NULL,
LTC4222_FAULT1, FAULT_OV);
static SENSOR_DEVICE_ATTR_2(in2_alarm, S_IRUGO, ltc4222_show_bool, NULL,
LTC4222_FAULT1, FAULT_POWER_BAD | FAULT_FET_BAD);
static SENSOR_DEVICE_ATTR_2(in3_min_alarm, S_IRUGO, ltc4222_show_bool, NULL,
LTC4222_FAULT2, FAULT_UV);
static SENSOR_DEVICE_ATTR_2(in3_max_alarm, S_IRUGO, ltc4222_show_bool, NULL,
LTC4222_FAULT2, FAULT_OV);
static SENSOR_DEVICE_ATTR_2(in4_alarm, S_IRUGO, ltc4222_show_bool, NULL,
LTC4222_FAULT2, FAULT_POWER_BAD | FAULT_FET_BAD);
/* Current (via sense resistor) */
static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, ltc4222_show_value, NULL,
LTC4222_SENSE1);
static SENSOR_DEVICE_ATTR(curr2_input, S_IRUGO, ltc4222_show_value, NULL,
LTC4222_SENSE2);
/* Overcurrent alarm */
static SENSOR_DEVICE_ATTR_2(curr1_max_alarm, S_IRUGO, ltc4222_show_bool, NULL,
LTC4222_FAULT1, FAULT_OC);
static SENSOR_DEVICE_ATTR_2(curr2_max_alarm, S_IRUGO, ltc4222_show_bool, NULL,
LTC4222_FAULT2, FAULT_OC);
static struct attribute *ltc4222_attrs[] = {
&sensor_dev_attr_in1_input.dev_attr.attr,
&sensor_dev_attr_in1_min_alarm.dev_attr.attr,
&sensor_dev_attr_in1_max_alarm.dev_attr.attr,
&sensor_dev_attr_in2_input.dev_attr.attr,
&sensor_dev_attr_in2_alarm.dev_attr.attr,
&sensor_dev_attr_in3_input.dev_attr.attr,
&sensor_dev_attr_in3_min_alarm.dev_attr.attr,
&sensor_dev_attr_in3_max_alarm.dev_attr.attr,
&sensor_dev_attr_in4_input.dev_attr.attr,
&sensor_dev_attr_in4_alarm.dev_attr.attr,
&sensor_dev_attr_curr1_input.dev_attr.attr,
&sensor_dev_attr_curr1_max_alarm.dev_attr.attr,
&sensor_dev_attr_curr2_input.dev_attr.attr,
&sensor_dev_attr_curr2_max_alarm.dev_attr.attr,
NULL,
};
ATTRIBUTE_GROUPS(ltc4222);
static struct regmap_config ltc4222_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = LTC4222_ADC_CONTROL,
};
static int ltc4222_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct device *dev = &client->dev;
struct device *hwmon_dev;
struct regmap *regmap;
regmap = devm_regmap_init_i2c(client, &ltc4222_regmap_config);
if (IS_ERR(regmap)) {
dev_err(dev, "failed to allocate register map\n");
return PTR_ERR(regmap);
}
/* Clear faults */
regmap_write(regmap, LTC4222_FAULT1, 0x00);
regmap_write(regmap, LTC4222_FAULT2, 0x00);
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
regmap,
ltc4222_groups);
return PTR_ERR_OR_ZERO(hwmon_dev);
}
static const struct i2c_device_id ltc4222_id[] = {
{"ltc4222", 0},
{ }
};
MODULE_DEVICE_TABLE(i2c, ltc4222_id);
static struct i2c_driver ltc4222_driver = {
.driver = {
.name = "ltc4222",
},
.probe = ltc4222_probe,
.id_table = ltc4222_id,
};
module_i2c_driver(ltc4222_driver);
MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
MODULE_DESCRIPTION("LTC4222 driver");
MODULE_LICENSE("GPL");
drivers/hwmon/ltc4245.c
浏览文件 @ 26f31fb9
......@@ -95,7 +95,6 @@ static void ltc4245_update_gpios(struct device *dev)
* readings as stale by setting them to -EAGAIN
*/
if (time_after(jiffies, data->last_updated + 5 * HZ)) {
dev_dbg(&client->dev, "Marking GPIOs invalid\n");
for (i = 0; i < ARRAY_SIZE(data->gpios); i++)
data->gpios[i] = -EAGAIN;
}
......@@ -141,8 +140,6 @@ static struct ltc4245_data *ltc4245_update_device(struct device *dev)
if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
dev_dbg(&client->dev, "Starting ltc4245 update\n");
/* Read control registers -- 0x00 to 0x07 */
for (i = 0; i < ARRAY_SIZE(data->cregs); i++) {
val = i2c_smbus_read_byte_data(client, i);
......@@ -470,19 +467,15 @@ static void ltc4245_sysfs_add_groups(struct ltc4245_data *data)
static bool ltc4245_use_extra_gpios(struct i2c_client *client)
{
struct ltc4245_platform_data *pdata = dev_get_platdata(&client->dev);
#ifdef CONFIG_OF
struct device_node *np = client->dev.of_node;
#endif
/* prefer platform data */
if (pdata)
return pdata->use_extra_gpios;
#ifdef CONFIG_OF
/* fallback on OF */
if (of_find_property(np, "ltc4245,use-extra-gpios", NULL))
return true;
#endif
return false;
}
......@@ -512,24 +505,10 @@ static int ltc4245_probe(struct i2c_client *client,
/* Add sysfs hooks */
ltc4245_sysfs_add_groups(data);
hwmon_dev = hwmon_device_register_with_groups(&client->dev,
client->name, data,
data->groups);
if (IS_ERR(hwmon_dev))
return PTR_ERR(hwmon_dev);
i2c_set_clientdata(client, hwmon_dev);
return 0;
}
static int ltc4245_remove(struct i2c_client *client)
{
struct device *hwmon_dev = i2c_get_clientdata(client);
hwmon_device_unregister(hwmon_dev);
return 0;
hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev,
client->name, data,
data->groups);
return PTR_ERR_OR_ZERO(hwmon_dev);
}
static const struct i2c_device_id ltc4245_id[] = {
......@@ -544,7 +523,6 @@ static struct i2c_driver ltc4245_driver = {
.name = "ltc4245",
},
.probe = ltc4245_probe,
.remove = ltc4245_remove,
.id_table = ltc4245_id,
};
......
drivers/hwmon/ltc4260.c 0 → 100644
浏览文件 @ 26f31fb9
/*
* Driver for Linear Technology LTC4260 I2C Positive Voltage Hot Swap Controller
*
* Copyright (c) 2014 Guenter Roeck
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/jiffies.h>
#include <linux/regmap.h>
/* chip registers */
#define LTC4260_CONTROL 0x00
#define LTC4260_ALERT 0x01
#define LTC4260_STATUS 0x02
#define LTC4260_FAULT 0x03
#define LTC4260_SENSE 0x04
#define LTC4260_SOURCE 0x05
#define LTC4260_ADIN 0x06
/*
* Fault register bits
*/
#define FAULT_OV (1 << 0)
#define FAULT_UV (1 << 1)
#define FAULT_OC (1 << 2)
#define FAULT_POWER_BAD (1 << 3)
#define FAULT_FET_SHORT (1 << 5)
/* Return the voltage from the given register in mV or mA */
static int ltc4260_get_value(struct device *dev, u8 reg)
{
struct regmap *regmap = dev_get_drvdata(dev);
unsigned int val;
int ret;
ret = regmap_read(regmap, reg, &val);
if (ret < 0)
return ret;
switch (reg) {
case LTC4260_ADIN:
/* 10 mV resolution. Convert to mV. */
val = val * 10;
break;
case LTC4260_SOURCE:
/* 400 mV resolution. Convert to mV. */
val = val * 400;
break;
case LTC4260_SENSE:
/*
* 300 uV resolution. Convert to current as measured with
* an 1 mOhm sense resistor, in mA. If a different sense
* resistor is installed, calculate the actual current by
* dividing the reported current by the sense resistor value
* in mOhm.
*/
val = val * 300;
break;
default:
return -EINVAL;
}
return val;
}
static ssize_t ltc4260_show_value(struct device *dev,
struct device_attribute *da, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
int value;
value = ltc4260_get_value(dev, attr->index);
if (value < 0)
return value;
return snprintf(buf, PAGE_SIZE, "%d\n", value);
}
static ssize_t ltc4260_show_bool(struct device *dev,
struct device_attribute *da, char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
struct regmap *regmap = dev_get_drvdata(dev);
unsigned int fault;
int ret;
ret = regmap_read(regmap, LTC4260_FAULT, &fault);
if (ret < 0)
return ret;
fault &= attr->index;
if (fault) /* Clear reported faults in chip register */
regmap_update_bits(regmap, LTC4260_FAULT, attr->index, 0);
return snprintf(buf, PAGE_SIZE, "%d\n", !!fault);
}
/* Voltages */
static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, ltc4260_show_value, NULL,
LTC4260_SOURCE);
static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, ltc4260_show_value, NULL,
LTC4260_ADIN);
/*
* Voltage alarms
* UV/OV faults are associated with the input voltage, and the POWER BAD and
* FET SHORT faults are associated with the output voltage.
*/
static SENSOR_DEVICE_ATTR(in1_min_alarm, S_IRUGO, ltc4260_show_bool, NULL,
FAULT_UV);
static SENSOR_DEVICE_ATTR(in1_max_alarm, S_IRUGO, ltc4260_show_bool, NULL,
FAULT_OV);
static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, ltc4260_show_bool, NULL,
FAULT_POWER_BAD | FAULT_FET_SHORT);
/* Current (via sense resistor) */
static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, ltc4260_show_value, NULL,
LTC4260_SENSE);
/* Overcurrent alarm */
static SENSOR_DEVICE_ATTR(curr1_max_alarm, S_IRUGO, ltc4260_show_bool, NULL,
FAULT_OC);
static struct attribute *ltc4260_attrs[] = {
&sensor_dev_attr_in1_input.dev_attr.attr,
&sensor_dev_attr_in1_min_alarm.dev_attr.attr,
&sensor_dev_attr_in1_max_alarm.dev_attr.attr,
&sensor_dev_attr_in2_input.dev_attr.attr,
&sensor_dev_attr_in2_alarm.dev_attr.attr,
&sensor_dev_attr_curr1_input.dev_attr.attr,
&sensor_dev_attr_curr1_max_alarm.dev_attr.attr,
NULL,
};
ATTRIBUTE_GROUPS(ltc4260);
static struct regmap_config ltc4260_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = LTC4260_ADIN,
};
static int ltc4260_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct device *dev = &client->dev;
struct device *hwmon_dev;
struct regmap *regmap;
regmap = devm_regmap_init_i2c(client, &ltc4260_regmap_config);
if (IS_ERR(regmap)) {
dev_err(dev, "failed to allocate register map\n");
return PTR_ERR(regmap);
}
/* Clear faults */
regmap_write(regmap, LTC4260_FAULT, 0x00);
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
regmap,
ltc4260_groups);
return PTR_ERR_OR_ZERO(hwmon_dev);
}
static const struct i2c_device_id ltc4260_id[] = {
{"ltc4260", 0},
{ }
};
MODULE_DEVICE_TABLE(i2c, ltc4260_id);
static struct i2c_driver ltc4260_driver = {
.driver = {
.name = "ltc4260",
},
.probe = ltc4260_probe,
.id_table = ltc4260_id,
};
module_i2c_driver(ltc4260_driver);
MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
MODULE_DESCRIPTION("LTC4260 driver");
MODULE_LICENSE("GPL");
drivers/hwmon/max1668.c
浏览文件 @ 26f31fb9
......@@ -66,7 +66,8 @@ MODULE_PARM_DESC(read_only, "Don't set any values, read only mode");
enum chips { max1668, max1805, max1989 };
struct max1668_data {
struct device *hwmon_dev;
struct i2c_client *client;
const struct attribute_group *groups[3];
enum chips type;
struct mutex update_lock;
......@@ -82,8 +83,8 @@ struct max1668_data {
static struct max1668_data *max1668_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct max1668_data *data = i2c_get_clientdata(client);
struct max1668_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
struct max1668_data *ret = data;
s32 val;
int i;
......@@ -205,8 +206,8 @@ static ssize_t set_temp_max(struct device *dev,
const char *buf, size_t count)
{
int index = to_sensor_dev_attr(devattr)->index;
struct i2c_client *client = to_i2c_client(dev);
struct max1668_data *data = i2c_get_clientdata(client);
struct max1668_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
long temp;
int ret;
......@@ -216,10 +217,11 @@ static ssize_t set_temp_max(struct device *dev,
mutex_lock(&data->update_lock);
data->temp_max[index] = clamp_val(temp/1000, -128, 127);
if (i2c_smbus_write_byte_data(client,
ret = i2c_smbus_write_byte_data(client,
MAX1668_REG_LIMH_WR(index),
data->temp_max[index]))
count = -EIO;
data->temp_max[index]);
if (ret < 0)
count = ret;
mutex_unlock(&data->update_lock);
return count;
......@@ -230,8 +232,8 @@ static ssize_t set_temp_min(struct device *dev,
const char *buf, size_t count)
{
int index = to_sensor_dev_attr(devattr)->index;
struct i2c_client *client = to_i2c_client(dev);
struct max1668_data *data = i2c_get_clientdata(client);
struct max1668_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
long temp;
int ret;
......@@ -241,10 +243,11 @@ static ssize_t set_temp_min(struct device *dev,
mutex_lock(&data->update_lock);
data->temp_min[index] = clamp_val(temp/1000, -128, 127);
if (i2c_smbus_write_byte_data(client,
ret = i2c_smbus_write_byte_data(client,
MAX1668_REG_LIML_WR(index),
data->temp_min[index]))
count = -EIO;
data->temp_min[index]);
if (ret < 0)
count = ret;
mutex_unlock(&data->update_lock);
return count;
......@@ -405,60 +408,29 @@ static int max1668_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct i2c_adapter *adapter = client->adapter;
struct device *dev = &client->dev;
struct device *hwmon_dev;
struct max1668_data *data;
int err;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
data = devm_kzalloc(&client->dev, sizeof(struct max1668_data),
GFP_KERNEL);
data = devm_kzalloc(dev, sizeof(struct max1668_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
i2c_set_clientdata(client, data);
data->client = client;
data->type = id->driver_data;
mutex_init(&data->update_lock);
/* Register sysfs hooks */
err = sysfs_create_group(&client->dev.kobj, &max1668_group_common);
if (err)
return err;
if (data->type == max1668 || data->type == max1989) {
err = sysfs_create_group(&client->dev.kobj,
&max1668_group_unique);
if (err)
goto error_sysrem0;
}
data->hwmon_dev = hwmon_device_register(&client->dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
goto error_sysrem1;
}
return 0;
error_sysrem1:
/* sysfs hooks */
data->groups[0] = &max1668_group_common;
if (data->type == max1668 || data->type == max1989)
sysfs_remove_group(&client->dev.kobj, &max1668_group_unique);
error_sysrem0:
sysfs_remove_group(&client->dev.kobj, &max1668_group_common);
return err;
}
static int max1668_remove(struct i2c_client *client)
{
struct max1668_data *data = i2c_get_clientdata(client);
data->groups[1] = &max1668_group_unique;
hwmon_device_unregister(data->hwmon_dev);
if (data->type == max1668 || data->type == max1989)
sysfs_remove_group(&client->dev.kobj, &max1668_group_unique);
sysfs_remove_group(&client->dev.kobj, &max1668_group_common);
return 0;
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
data, data->groups);
return PTR_ERR_OR_ZERO(hwmon_dev);
}
static const struct i2c_device_id max1668_id[] = {
......@@ -476,7 +448,6 @@ static struct i2c_driver max1668_driver = {
.name = "max1668",
},
.probe = max1668_probe,
.remove = max1668_remove,
.id_table = max1668_id,
.detect = max1668_detect,
.address_list = max1668_addr_list,
......
drivers/hwmon/max6639.c
浏览文件 @ 26f31fb9
......@@ -80,7 +80,7 @@ static const int rpm_ranges[] = { 2000, 4000, 8000, 16000 };
* Client data (each client gets its own)
*/
struct max6639_data {
struct device *hwmon_dev;
struct i2c_client *client;
struct mutex update_lock;
char valid; /* !=0 if following fields are valid */
unsigned long last_updated; /* In jiffies */
......@@ -104,8 +104,8 @@ struct max6639_data {
static struct max6639_data *max6639_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct max6639_data *data = i2c_get_clientdata(client);
struct max6639_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
struct max6639_data *ret = data;
int i;
int status_reg;
......@@ -191,9 +191,8 @@ static ssize_t show_temp_fault(struct device *dev,
static ssize_t show_temp_max(struct device *dev,
struct device_attribute *dev_attr, char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct max6639_data *data = i2c_get_clientdata(client);
struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
struct max6639_data *data = dev_get_drvdata(dev);
return sprintf(buf, "%d\n", (data->temp_therm[attr->index] * 1000));
}
......@@ -202,9 +201,9 @@ static ssize_t set_temp_max(struct device *dev,
struct device_attribute *dev_attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct max6639_data *data = i2c_get_clientdata(client);
struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
struct max6639_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
unsigned long val;
int res;
......@@ -224,9 +223,8 @@ static ssize_t set_temp_max(struct device *dev,
static ssize_t show_temp_crit(struct device *dev,
struct device_attribute *dev_attr, char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct max6639_data *data = i2c_get_clientdata(client);
struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
struct max6639_data *data = dev_get_drvdata(dev);
return sprintf(buf, "%d\n", (data->temp_alert[attr->index] * 1000));
}
......@@ -235,9 +233,9 @@ static ssize_t set_temp_crit(struct device *dev,
struct device_attribute *dev_attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct max6639_data *data = i2c_get_clientdata(client);
struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
struct max6639_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
unsigned long val;
int res;
......@@ -258,9 +256,8 @@ static ssize_t show_temp_emergency(struct device *dev,
struct device_attribute *dev_attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct max6639_data *data = i2c_get_clientdata(client);
struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
struct max6639_data *data = dev_get_drvdata(dev);
return sprintf(buf, "%d\n", (data->temp_ot[attr->index] * 1000));
}
......@@ -269,9 +266,9 @@ static ssize_t set_temp_emergency(struct device *dev,
struct device_attribute *dev_attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct max6639_data *data = i2c_get_clientdata(client);
struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
struct max6639_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
unsigned long val;
int res;
......@@ -291,9 +288,8 @@ static ssize_t set_temp_emergency(struct device *dev,
static ssize_t show_pwm(struct device *dev,
struct device_attribute *dev_attr, char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct max6639_data *data = i2c_get_clientdata(client);
struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
struct max6639_data *data = dev_get_drvdata(dev);
return sprintf(buf, "%d\n", data->pwm[attr->index] * 255 / 120);
}
......@@ -302,9 +298,9 @@ static ssize_t set_pwm(struct device *dev,
struct device_attribute *dev_attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct max6639_data *data = i2c_get_clientdata(client);
struct sensor_device_attribute *attr = to_sensor_dev_attr(dev_attr);
struct max6639_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
unsigned long val;
int res;
......@@ -378,7 +374,7 @@ static SENSOR_DEVICE_ATTR(temp1_emergency_alarm, S_IRUGO, show_alarm, NULL, 5);
static SENSOR_DEVICE_ATTR(temp2_emergency_alarm, S_IRUGO, show_alarm, NULL, 4);
static struct attribute *max6639_attributes[] = {
static struct attribute *max6639_attrs[] = {
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp2_input.dev_attr.attr,
&sensor_dev_attr_temp1_fault.dev_attr.attr,
......@@ -403,10 +399,7 @@ static struct attribute *max6639_attributes[] = {
&sensor_dev_attr_temp2_emergency_alarm.dev_attr.attr,
NULL
};
static const struct attribute_group max6639_group = {
.attrs = max6639_attributes,
};
ATTRIBUTE_GROUPS(max6639);
/*
* returns respective index in rpm_ranges table
......@@ -424,9 +417,9 @@ static int rpm_range_to_reg(int range)
return 1; /* default: 4000 RPM */
}
static int max6639_init_client(struct i2c_client *client)
static int max6639_init_client(struct i2c_client *client,
struct max6639_data *data)
{
struct max6639_data *data = i2c_get_clientdata(client);
struct max6639_platform_data *max6639_info =
dev_get_platdata(&client->dev);
int i;
......@@ -545,50 +538,27 @@ static int max6639_detect(struct i2c_client *client,
static int max6639_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct device *dev = &client->dev;
struct max6639_data *data;
struct device *hwmon_dev;
int err;
data = devm_kzalloc(&client->dev, sizeof(struct max6639_data),
GFP_KERNEL);
data = devm_kzalloc(dev, sizeof(struct max6639_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
i2c_set_clientdata(client, data);
data->client = client;
mutex_init(&data->update_lock);
/* Initialize the max6639 chip */
err = max6639_init_client(client);
err = max6639_init_client(client, data);
if (err < 0)
return err;
/* Register sysfs hooks */
err = sysfs_create_group(&client->dev.kobj, &max6639_group);
if (err)
return err;
data->hwmon_dev = hwmon_device_register(&client->dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
goto error_remove;
}
dev_info(&client->dev, "temperature sensor and fan control found\n");
return 0;
error_remove:
sysfs_remove_group(&client->dev.kobj, &max6639_group);
return err;
}
static int max6639_remove(struct i2c_client *client)
{
struct max6639_data *data = i2c_get_clientdata(client);
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &max6639_group);
return 0;
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
data,
max6639_groups);
return PTR_ERR_OR_ZERO(hwmon_dev);
}
#ifdef CONFIG_PM_SLEEP
......@@ -622,9 +592,7 @@ static const struct i2c_device_id max6639_id[] = {
MODULE_DEVICE_TABLE(i2c, max6639_id);
static const struct dev_pm_ops max6639_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(max6639_suspend, max6639_resume)
};
static SIMPLE_DEV_PM_OPS(max6639_pm_ops, max6639_suspend, max6639_resume);
static struct i2c_driver max6639_driver = {
.class = I2C_CLASS_HWMON,
......@@ -633,7 +601,6 @@ static struct i2c_driver max6639_driver = {
.pm = &max6639_pm_ops,
},
.probe = max6639_probe,
.remove = max6639_remove,
.id_table = max6639_id,
.detect = max6639_detect,
.address_list = normal_i2c,
......
drivers/hwmon/max6650.c
浏览文件 @ 26f31fb9
......@@ -105,38 +105,13 @@ module_param(clock, int, S_IRUGO);
#define DIV_FROM_REG(reg) (1 << (reg & 7))
static int max6650_probe(struct i2c_client *client,
const struct i2c_device_id *id);
static int max6650_init_client(struct i2c_client *client);
static int max6650_remove(struct i2c_client *client);
static struct max6650_data *max6650_update_device(struct device *dev);
/*
* Driver data (common to all clients)
*/
static const struct i2c_device_id max6650_id[] = {
{ "max6650", 1 },
{ "max6651", 4 },
{ }
};
MODULE_DEVICE_TABLE(i2c, max6650_id);
static struct i2c_driver max6650_driver = {
.driver = {
.name = "max6650",
},
.probe = max6650_probe,
.remove = max6650_remove,
.id_table = max6650_id,
};
/*
* Client data (each client gets its own)
*/
struct max6650_data {
struct device *hwmon_dev;
struct i2c_client *client;
const struct attribute_group *groups[3];
struct mutex update_lock;
int nr_fans;
char valid; /* zero until following fields are valid */
......@@ -151,6 +126,51 @@ struct max6650_data {
u8 alarm;
};
static const u8 tach_reg[] = {
MAX6650_REG_TACH0,
MAX6650_REG_TACH1,
MAX6650_REG_TACH2,
MAX6650_REG_TACH3,
};
static struct max6650_data *max6650_update_device(struct device *dev)
{
struct max6650_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
int i;
mutex_lock(&data->update_lock);
if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
data->speed = i2c_smbus_read_byte_data(client,
MAX6650_REG_SPEED);
data->config = i2c_smbus_read_byte_data(client,
MAX6650_REG_CONFIG);
for (i = 0; i < data->nr_fans; i++) {
data->tach[i] = i2c_smbus_read_byte_data(client,
tach_reg[i]);
}
data->count = i2c_smbus_read_byte_data(client,
MAX6650_REG_COUNT);
data->dac = i2c_smbus_read_byte_data(client, MAX6650_REG_DAC);
/*
* Alarms are cleared on read in case the condition that
* caused the alarm is removed. Keep the value latched here
* for providing the register through different alarm files.
*/
data->alarm |= i2c_smbus_read_byte_data(client,
MAX6650_REG_ALARM);
data->last_updated = jiffies;
data->valid = 1;
}
mutex_unlock(&data->update_lock);
return data;
}
static ssize_t get_fan(struct device *dev, struct device_attribute *devattr,
char *buf)
{
......@@ -235,8 +255,8 @@ static ssize_t get_target(struct device *dev, struct device_attribute *devattr,
static ssize_t set_target(struct device *dev, struct device_attribute *devattr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct max6650_data *data = i2c_get_clientdata(client);
struct max6650_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
int kscale, ktach;
unsigned long rpm;
int err;
......@@ -304,8 +324,8 @@ static ssize_t get_pwm(struct device *dev, struct device_attribute *devattr,
static ssize_t set_pwm(struct device *dev, struct device_attribute *devattr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct max6650_data *data = i2c_get_clientdata(client);
struct max6650_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
unsigned long pwm;
int err;
......@@ -350,8 +370,8 @@ static ssize_t get_enable(struct device *dev, struct device_attribute *devattr,
static ssize_t set_enable(struct device *dev, struct device_attribute *devattr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct max6650_data *data = i2c_get_clientdata(client);
struct max6650_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
int max6650_modes[3] = {0, 3, 2};
unsigned long mode;
int err;
......@@ -400,8 +420,8 @@ static ssize_t get_div(struct device *dev, struct device_attribute *devattr,
static ssize_t set_div(struct device *dev, struct device_attribute *devattr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct max6650_data *data = i2c_get_clientdata(client);
struct max6650_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
unsigned long div;
int err;
......@@ -446,7 +466,7 @@ static ssize_t get_alarm(struct device *dev, struct device_attribute *devattr,
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct max6650_data *data = max6650_update_device(dev);
struct i2c_client *client = to_i2c_client(dev);
struct i2c_client *client = data->client;
int alarm = 0;
if (data->alarm & attr->index) {
......@@ -484,7 +504,8 @@ static umode_t max6650_attrs_visible(struct kobject *kobj, struct attribute *a,
int n)
{
struct device *dev = container_of(kobj, struct device, kobj);
struct i2c_client *client = to_i2c_client(dev);
struct max6650_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
u8 alarm_en = i2c_smbus_read_byte_data(client, MAX6650_REG_ALARM_EN);
struct device_attribute *devattr;
......@@ -519,7 +540,7 @@ static struct attribute *max6650_attrs[] = {
NULL
};
static struct attribute_group max6650_attr_grp = {
static const struct attribute_group max6650_group = {
.attrs = max6650_attrs,
.is_visible = max6650_attrs_visible,
};
......@@ -531,7 +552,7 @@ static struct attribute *max6651_attrs[] = {
NULL
};
static const struct attribute_group max6651_attr_grp = {
static const struct attribute_group max6651_group = {
.attrs = max6651_attrs,
};
......@@ -539,74 +560,17 @@ static const struct attribute_group max6651_attr_grp = {
* Real code
*/
static int max6650_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct max6650_data *data;
int err;
data = devm_kzalloc(&client->dev, sizeof(struct max6650_data),
GFP_KERNEL);
if (!data) {
dev_err(&client->dev, "out of memory.\n");
return -ENOMEM;
}
i2c_set_clientdata(client, data);
mutex_init(&data->update_lock);
data->nr_fans = id->driver_data;
/*
* Initialize the max6650 chip
*/
err = max6650_init_client(client);
if (err)
return err;
err = sysfs_create_group(&client->dev.kobj, &max6650_attr_grp);
if (err)
return err;
/* 3 additional fan inputs for the MAX6651 */
if (data->nr_fans == 4) {
err = sysfs_create_group(&client->dev.kobj, &max6651_attr_grp);
if (err)
goto err_remove;
}
data->hwmon_dev = hwmon_device_register(&client->dev);
if (!IS_ERR(data->hwmon_dev))
return 0;
err = PTR_ERR(data->hwmon_dev);
dev_err(&client->dev, "error registering hwmon device.\n");
if (data->nr_fans == 4)
sysfs_remove_group(&client->dev.kobj, &max6651_attr_grp);
err_remove:
sysfs_remove_group(&client->dev.kobj, &max6650_attr_grp);
return err;
}
static int max6650_remove(struct i2c_client *client)
static int max6650_init_client(struct max6650_data *data,
struct i2c_client *client)
{
struct max6650_data *data = i2c_get_clientdata(client);
hwmon_device_unregister(data->hwmon_dev);
if (data->nr_fans == 4)
sysfs_remove_group(&client->dev.kobj, &max6651_attr_grp);
sysfs_remove_group(&client->dev.kobj, &max6650_attr_grp);
return 0;
}
static int max6650_init_client(struct i2c_client *client)
{
struct max6650_data *data = i2c_get_clientdata(client);
struct device *dev = &client->dev;
int config;
int err = -EIO;
config = i2c_smbus_read_byte_data(client, MAX6650_REG_CONFIG);
if (config < 0) {
dev_err(&client->dev, "Error reading config, aborting.\n");
dev_err(dev, "Error reading config, aborting.\n");
return err;
}
......@@ -620,11 +584,11 @@ static int max6650_init_client(struct i2c_client *client)
config |= MAX6650_CFG_V12;
break;
default:
dev_err(&client->dev, "illegal value for fan_voltage (%d)\n",
dev_err(dev, "illegal value for fan_voltage (%d)\n",
fan_voltage);
}
dev_info(&client->dev, "Fan voltage is set to %dV.\n",
dev_info(dev, "Fan voltage is set to %dV.\n",
(config & MAX6650_CFG_V12) ? 12 : 5);
switch (prescaler) {
......@@ -650,11 +614,10 @@ static int max6650_init_client(struct i2c_client *client)
| MAX6650_CFG_PRESCALER_16;
break;
default:
dev_err(&client->dev, "illegal value for prescaler (%d)\n",
prescaler);
dev_err(dev, "illegal value for prescaler (%d)\n", prescaler);
}
dev_info(&client->dev, "Prescaler is set to %d.\n",
dev_info(dev, "Prescaler is set to %d.\n",
1 << (config & MAX6650_CFG_PRESCALER_MASK));
/*
......@@ -664,17 +627,17 @@ static int max6650_init_client(struct i2c_client *client)
*/
if ((config & MAX6650_CFG_MODE_MASK) == MAX6650_CFG_MODE_OFF) {
dev_dbg(&client->dev, "Change mode to open loop, full off.\n");
dev_dbg(dev, "Change mode to open loop, full off.\n");
config = (config & ~MAX6650_CFG_MODE_MASK)
| MAX6650_CFG_MODE_OPEN_LOOP;
if (i2c_smbus_write_byte_data(client, MAX6650_REG_DAC, 255)) {
dev_err(&client->dev, "DAC write error, aborting.\n");
dev_err(dev, "DAC write error, aborting.\n");
return err;
}
}
if (i2c_smbus_write_byte_data(client, MAX6650_REG_CONFIG, config)) {
dev_err(&client->dev, "Config write error, aborting.\n");
dev_err(dev, "Config write error, aborting.\n");
return err;
}
......@@ -684,51 +647,55 @@ static int max6650_init_client(struct i2c_client *client)
return 0;
}
static const u8 tach_reg[] = {
MAX6650_REG_TACH0,
MAX6650_REG_TACH1,
MAX6650_REG_TACH2,
MAX6650_REG_TACH3,
};
static struct max6650_data *max6650_update_device(struct device *dev)
static int max6650_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int i;
struct i2c_client *client = to_i2c_client(dev);
struct max6650_data *data = i2c_get_clientdata(client);
mutex_lock(&data->update_lock);
struct device *dev = &client->dev;
struct max6650_data *data;
struct device *hwmon_dev;
int err;
if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
data->speed = i2c_smbus_read_byte_data(client,
MAX6650_REG_SPEED);
data->config = i2c_smbus_read_byte_data(client,
MAX6650_REG_CONFIG);
for (i = 0; i < data->nr_fans; i++) {
data->tach[i] = i2c_smbus_read_byte_data(client,
tach_reg[i]);
}
data->count = i2c_smbus_read_byte_data(client,
MAX6650_REG_COUNT);
data->dac = i2c_smbus_read_byte_data(client, MAX6650_REG_DAC);
data = devm_kzalloc(dev, sizeof(struct max6650_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
/*
* Alarms are cleared on read in case the condition that
* caused the alarm is removed. Keep the value latched here
* for providing the register through different alarm files.
*/
data->alarm |= i2c_smbus_read_byte_data(client,
MAX6650_REG_ALARM);
data->client = client;
mutex_init(&data->update_lock);
data->nr_fans = id->driver_data;
data->last_updated = jiffies;
data->valid = 1;
}
/*
* Initialize the max6650 chip
*/
err = max6650_init_client(data, client);
if (err)
return err;
mutex_unlock(&data->update_lock);
data->groups[0] = &max6650_group;
/* 3 additional fan inputs for the MAX6651 */
if (data->nr_fans == 4)
data->groups[1] = &max6651_group;
return data;
hwmon_dev = devm_hwmon_device_register_with_groups(dev,
client->name, data,
data->groups);
return PTR_ERR_OR_ZERO(hwmon_dev);
}
static const struct i2c_device_id max6650_id[] = {
{ "max6650", 1 },
{ "max6651", 4 },
{ }
};
MODULE_DEVICE_TABLE(i2c, max6650_id);
static struct i2c_driver max6650_driver = {
.driver = {
.name = "max6650",
},
.probe = max6650_probe,
.id_table = max6650_id,
};
module_i2c_driver(max6650_driver);
MODULE_AUTHOR("Hans J. Koch");
......
drivers/hwmon/pmbus/ltc2978.c
浏览文件 @ 26f31fb9
/*
* Hardware monitoring driver for LTC2974, LTC2977, LTC2978, LTC3880,
* and LTC3883
* LTC3883, and LTM4676
*
* Copyright (c) 2011 Ericsson AB.
* Copyright (c) 2013 Guenter Roeck
* Copyright (c) 2013, 2014 Guenter Roeck
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
......@@ -14,10 +14,6 @@
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/kernel.h>
......@@ -28,7 +24,7 @@
#include <linux/i2c.h>
#include "pmbus.h"
enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3883 };
enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3883, ltm4676 };
/* Common for all chips */
#define LTC2978_MFR_VOUT_PEAK 0xdd
......@@ -45,7 +41,7 @@ enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3883 };
#define LTC2974_MFR_IOUT_PEAK 0xd7
#define LTC2974_MFR_IOUT_MIN 0xd8
/* LTC3880 and LTC3883 */
/* LTC3880, LTC3883, and LTM4676 */
#define LTC3880_MFR_IOUT_PEAK 0xd7
#define LTC3880_MFR_CLEAR_PEAKS 0xe3
#define LTC3880_MFR_TEMPERATURE2_PEAK 0xf4
......@@ -53,7 +49,8 @@ enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3883 };
/* LTC3883 only */
#define LTC3883_MFR_IIN_PEAK 0xe1
#define LTC2974_ID 0x0212
#define LTC2974_ID_REV1 0x0212
#define LTC2974_ID_REV2 0x0213
#define LTC2977_ID 0x0130
#define LTC2978_ID_REV1 0x0121
#define LTC2978_ID_REV2 0x0122
......@@ -62,6 +59,8 @@ enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3883 };
#define LTC3880_ID_MASK 0xff00
#define LTC3883_ID 0x4300
#define LTC3883_ID_MASK 0xff00
#define LTM4676_ID 0x4480 /* datasheet claims 0x440X */
#define LTM4676_ID_MASK 0xfff0
#define LTC2974_NUM_PAGES 4
#define LTC2978_NUM_PAGES 8
......@@ -370,6 +369,7 @@ static const struct i2c_device_id ltc2978_id[] = {
{"ltc2978", ltc2978},
{"ltc3880", ltc3880},
{"ltc3883", ltc3883},
{"ltm4676", ltm4676},
{}
};
MODULE_DEVICE_TABLE(i2c, ltc2978_id);
......@@ -394,7 +394,7 @@ static int ltc2978_probe(struct i2c_client *client,
if (chip_id < 0)
return chip_id;
if (chip_id == LTC2974_ID) {
if (chip_id == LTC2974_ID_REV1 || chip_id == LTC2974_ID_REV2) {
data->id = ltc2974;
} else if (chip_id == LTC2977_ID) {
data->id = ltc2977;
......@@ -405,6 +405,8 @@ static int ltc2978_probe(struct i2c_client *client,
data->id = ltc3880;
} else if ((chip_id & LTC3883_ID_MASK) == LTC3883_ID) {
data->id = ltc3883;
} else if ((chip_id & LTM4676_ID_MASK) == LTM4676_ID) {
data->id = ltm4676;
} else {
dev_err(&client->dev, "Unsupported chip ID 0x%x\n", chip_id);
return -ENODEV;
......@@ -458,6 +460,7 @@ static int ltc2978_probe(struct i2c_client *client,
}
break;
case ltc3880:
case ltm4676:
info->read_word_data = ltc3880_read_word_data;
info->pages = LTC3880_NUM_PAGES;
info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN
......@@ -500,5 +503,5 @@ static struct i2c_driver ltc2978_driver = {
module_i2c_driver(ltc2978_driver);
MODULE_AUTHOR("Guenter Roeck");
MODULE_DESCRIPTION("PMBus driver for LTC2974, LTC2978, LTC3880, and LTC3883");
MODULE_DESCRIPTION("PMBus driver for LTC2974, LTC2978, LTC3880, LTC3883, and LTM4676");
MODULE_LICENSE("GPL");
drivers/hwmon/smm665.c
浏览文件 @ 26f31fb9
......@@ -222,7 +222,7 @@ static int smm665_read_adc(struct smm665_data *data, int adc)
rv = i2c_smbus_read_word_swapped(client, 0);
if (rv < 0) {
dev_dbg(&client->dev, "Failed to read ADC value: error %d", rv);
return -1;
return rv;
}
/*
* Validate/verify readback adc channel (in bit 11..14).
......
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