提交 fef37e9a 编写于 作者: R Renata Sayakhova 提交者: Greg Kroah-Hartman

DS2781 Maxim Stand-Alone Fuel Gauge battery and w1 slave drivers

Signed-off-by: NRenata Sayakhova <rsayakhova@gmail.com>
Acked-by: NEvgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
上级 f6e8a1d7
......@@ -76,6 +76,20 @@ config BATTERY_DS2780
help
Say Y here to enable support for batteries with ds2780 chip.
config BATTERY_DS2781
tristate "2781 battery driver"
depends on HAS_IOMEM
select W1
select W1_SLAVE_DS2781
help
If you enable this you will have the DS2781 battery driver support.
The battery monitor chip is used in many batteries/devices
as the one who is responsible for charging/discharging/monitoring
Li+ batteries.
If you are unsure, say N.
config BATTERY_DS2782
tristate "DS2782/DS2786 standalone gas-gauge"
depends on I2C
......
......@@ -16,6 +16,7 @@ obj-$(CONFIG_TEST_POWER) += test_power.o
obj-$(CONFIG_BATTERY_DS2760) += ds2760_battery.o
obj-$(CONFIG_BATTERY_DS2780) += ds2780_battery.o
obj-$(CONFIG_BATTERY_DS2781) += ds2781_battery.o
obj-$(CONFIG_BATTERY_DS2782) += ds2782_battery.o
obj-$(CONFIG_BATTERY_PMU) += pmu_battery.o
obj-$(CONFIG_BATTERY_OLPC) += olpc_battery.o
......
此差异已折叠。
......@@ -81,6 +81,19 @@ config W1_SLAVE_DS2780
If you are unsure, say N.
config W1_SLAVE_DS2781
tristate "Dallas 2781 battery monitor chip"
depends on W1
help
If you enable this you will have the DS2781 battery monitor
chip support.
The battery monitor chip is used in many batteries/devices
as the one who is responsible for charging/discharging/monitoring
Li+ batteries.
If you are unsure, say N.
config W1_SLAVE_BQ27000
tristate "BQ27000 slave support"
depends on W1
......
......@@ -10,4 +10,5 @@ obj-$(CONFIG_W1_SLAVE_DS2431) += w1_ds2431.o
obj-$(CONFIG_W1_SLAVE_DS2433) += w1_ds2433.o
obj-$(CONFIG_W1_SLAVE_DS2760) += w1_ds2760.o
obj-$(CONFIG_W1_SLAVE_DS2780) += w1_ds2780.o
obj-$(CONFIG_W1_SLAVE_DS2781) += w1_ds2781.o
obj-$(CONFIG_W1_SLAVE_BQ27000) += w1_bq27000.o
/*
* 1-Wire implementation for the ds2781 chip
*
* Author: Renata Sayakhova <renata@oktetlabs.ru>
*
* Based on w1-ds2780 driver
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/types.h>
#include <linux/platform_device.h>
#include <linux/mutex.h>
#include <linux/idr.h>
#include "../w1.h"
#include "../w1_int.h"
#include "../w1_family.h"
#include "w1_ds2781.h"
static int w1_ds2781_do_io(struct device *dev, char *buf, int addr,
size_t count, int io)
{
struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
if (addr > DS2781_DATA_SIZE || addr < 0)
return 0;
count = min_t(int, count, DS2781_DATA_SIZE - addr);
if (w1_reset_select_slave(sl) == 0) {
if (io) {
w1_write_8(sl->master, W1_DS2781_WRITE_DATA);
w1_write_8(sl->master, addr);
w1_write_block(sl->master, buf, count);
} else {
w1_write_8(sl->master, W1_DS2781_READ_DATA);
w1_write_8(sl->master, addr);
count = w1_read_block(sl->master, buf, count);
}
}
return count;
}
int w1_ds2781_io(struct device *dev, char *buf, int addr, size_t count,
int io)
{
struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
int ret;
if (!dev)
return -ENODEV;
mutex_lock(&sl->master->mutex);
ret = w1_ds2781_do_io(dev, buf, addr, count, io);
mutex_unlock(&sl->master->mutex);
return ret;
}
EXPORT_SYMBOL(w1_ds2781_io);
int w1_ds2781_io_nolock(struct device *dev, char *buf, int addr, size_t count,
int io)
{
int ret;
if (!dev)
return -ENODEV;
ret = w1_ds2781_do_io(dev, buf, addr, count, io);
return ret;
}
EXPORT_SYMBOL(w1_ds2781_io_nolock);
int w1_ds2781_eeprom_cmd(struct device *dev, int addr, int cmd)
{
struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
if (!dev)
return -EINVAL;
mutex_lock(&sl->master->mutex);
if (w1_reset_select_slave(sl) == 0) {
w1_write_8(sl->master, cmd);
w1_write_8(sl->master, addr);
}
mutex_unlock(&sl->master->mutex);
return 0;
}
EXPORT_SYMBOL(w1_ds2781_eeprom_cmd);
static ssize_t w1_ds2781_read_bin(struct file *filp,
struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buf, loff_t off, size_t count)
{
struct device *dev = container_of(kobj, struct device, kobj);
return w1_ds2781_io(dev, buf, off, count, 0);
}
static struct bin_attribute w1_ds2781_bin_attr = {
.attr = {
.name = "w1_slave",
.mode = S_IRUGO,
},
.size = DS2781_DATA_SIZE,
.read = w1_ds2781_read_bin,
};
static DEFINE_IDA(bat_ida);
static int w1_ds2781_add_slave(struct w1_slave *sl)
{
int ret;
int id;
struct platform_device *pdev;
id = ida_simple_get(&bat_ida, 0, 0, GFP_KERNEL);
if (id < 0) {
ret = id;
goto noid;
}
pdev = platform_device_alloc("ds2781-battery", id);
if (!pdev) {
ret = -ENOMEM;
goto pdev_alloc_failed;
}
pdev->dev.parent = &sl->dev;
ret = platform_device_add(pdev);
if (ret)
goto pdev_add_failed;
ret = sysfs_create_bin_file(&sl->dev.kobj, &w1_ds2781_bin_attr);
if (ret)
goto bin_attr_failed;
dev_set_drvdata(&sl->dev, pdev);
return 0;
bin_attr_failed:
pdev_add_failed:
platform_device_unregister(pdev);
pdev_alloc_failed:
ida_simple_remove(&bat_ida, id);
noid:
return ret;
}
static void w1_ds2781_remove_slave(struct w1_slave *sl)
{
struct platform_device *pdev = dev_get_drvdata(&sl->dev);
int id = pdev->id;
platform_device_unregister(pdev);
ida_simple_remove(&bat_ida, id);
sysfs_remove_bin_file(&sl->dev.kobj, &w1_ds2781_bin_attr);
}
static struct w1_family_ops w1_ds2781_fops = {
.add_slave = w1_ds2781_add_slave,
.remove_slave = w1_ds2781_remove_slave,
};
static struct w1_family w1_ds2781_family = {
.fid = W1_FAMILY_DS2781,
.fops = &w1_ds2781_fops,
};
static int __init w1_ds2781_init(void)
{
ida_init(&bat_ida);
return w1_register_family(&w1_ds2781_family);
}
static void __exit w1_ds2781_exit(void)
{
w1_unregister_family(&w1_ds2781_family);
ida_destroy(&bat_ida);
}
module_init(w1_ds2781_init);
module_exit(w1_ds2781_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Renata Sayakhova <renata@oktetlabs.ru>");
MODULE_DESCRIPTION("1-wire Driver for Maxim/Dallas DS2781 Stand-Alone Fuel Gauge IC");
/*
* 1-Wire implementation for the ds2780 chip
*
* Author: Renata Sayakhova <renata@oktetlabs.ru>
*
* Based on w1-ds2760 driver
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#ifndef _W1_DS2781_H
#define _W1_DS2781_H
/* Function commands */
#define W1_DS2781_READ_DATA 0x69
#define W1_DS2781_WRITE_DATA 0x6C
#define W1_DS2781_COPY_DATA 0x48
#define W1_DS2781_RECALL_DATA 0xB8
#define W1_DS2781_LOCK 0x6A
/* Register map */
/* Register 0x00 Reserved */
#define DS2781_STATUS 0x01
#define DS2781_RAAC_MSB 0x02
#define DS2781_RAAC_LSB 0x03
#define DS2781_RSAC_MSB 0x04
#define DS2781_RSAC_LSB 0x05
#define DS2781_RARC 0x06
#define DS2781_RSRC 0x07
#define DS2781_IAVG_MSB 0x08
#define DS2781_IAVG_LSB 0x09
#define DS2781_TEMP_MSB 0x0A
#define DS2781_TEMP_LSB 0x0B
#define DS2781_VOLT_MSB 0x0C
#define DS2781_VOLT_LSB 0x0D
#define DS2781_CURRENT_MSB 0x0E
#define DS2781_CURRENT_LSB 0x0F
#define DS2781_ACR_MSB 0x10
#define DS2781_ACR_LSB 0x11
#define DS2781_ACRL_MSB 0x12
#define DS2781_ACRL_LSB 0x13
#define DS2781_AS 0x14
#define DS2781_SFR 0x15
#define DS2781_FULL_MSB 0x16
#define DS2781_FULL_LSB 0x17
#define DS2781_AE_MSB 0x18
#define DS2781_AE_LSB 0x19
#define DS2781_SE_MSB 0x1A
#define DS2781_SE_LSB 0x1B
/* Register 0x1C - 0x1E Reserved */
#define DS2781_EEPROM 0x1F
#define DS2781_EEPROM_BLOCK0_START 0x20
/* Register 0x20 - 0x2F User EEPROM */
#define DS2781_EEPROM_BLOCK0_END 0x2F
/* Register 0x30 - 0x5F Reserved */
#define DS2781_EEPROM_BLOCK1_START 0x60
#define DS2781_CONTROL 0x60
#define DS2781_AB 0x61
#define DS2781_AC_MSB 0x62
#define DS2781_AC_LSB 0x63
#define DS2781_VCHG 0x64
#define DS2781_IMIN 0x65
#define DS2781_VAE 0x66
#define DS2781_IAE 0x67
#define DS2781_AE_40 0x68
#define DS2781_RSNSP 0x69
#define DS2781_FULL_40_MSB 0x6A
#define DS2781_FULL_40_LSB 0x6B
#define DS2781_FULL_4_SLOPE 0x6C
#define DS2781_FULL_3_SLOPE 0x6D
#define DS2781_FULL_2_SLOPE 0x6E
#define DS2781_FULL_1_SLOPE 0x6F
#define DS2781_AE_4_SLOPE 0x70
#define DS2781_AE_3_SLOPE 0x71
#define DS2781_AE_2_SLOPE 0x72
#define DS2781_AE_1_SLOPE 0x73
#define DS2781_SE_4_SLOPE 0x74
#define DS2781_SE_3_SLOPE 0x75
#define DS2781_SE_2_SLOPE 0x76
#define DS2781_SE_1_SLOPE 0x77
#define DS2781_RSGAIN_MSB 0x78
#define DS2781_RSGAIN_LSB 0x79
#define DS2781_RSTC 0x7A
#define DS2781_COB 0x7B
#define DS2781_TBP34 0x7C
#define DS2781_TBP23 0x7D
#define DS2781_TBP12 0x7E
#define DS2781_EEPROM_BLOCK1_END 0x7F
/* Register 0x7D - 0xFF Reserved */
#define DS2781_FSGAIN_MSB 0xB0
#define DS2781_FSGAIN_LSB 0xB1
/* Number of valid register addresses */
#define DS2781_DATA_SIZE 0xB2
/* Status register bits */
#define DS2781_STATUS_CHGTF (1 << 7)
#define DS2781_STATUS_AEF (1 << 6)
#define DS2781_STATUS_SEF (1 << 5)
#define DS2781_STATUS_LEARNF (1 << 4)
/* Bit 3 Reserved */
#define DS2781_STATUS_UVF (1 << 2)
#define DS2781_STATUS_PORF (1 << 1)
/* Bit 0 Reserved */
/* Control register bits */
/* Bit 7 Reserved */
#define DS2781_CONTROL_NBEN (1 << 7)
#define DS2781_CONTROL_UVEN (1 << 6)
#define DS2781_CONTROL_PMOD (1 << 5)
#define DS2781_CONTROL_RNAOP (1 << 4)
#define DS1781_CONTROL_UVTH (1 << 3)
/* Bit 0 - 2 Reserved */
/* Special feature register bits */
/* Bit 1 - 7 Reserved */
#define DS2781_SFR_PIOSC (1 << 0)
/* EEPROM register bits */
#define DS2781_EEPROM_EEC (1 << 7)
#define DS2781_EEPROM_LOCK (1 << 6)
/* Bit 2 - 6 Reserved */
#define DS2781_EEPROM_BL1 (1 << 1)
#define DS2781_EEPROM_BL0 (1 << 0)
extern int w1_ds2781_io(struct device *dev, char *buf, int addr, size_t count,
int io);
extern int w1_ds2781_io_nolock(struct device *dev, char *buf, int addr,
size_t count, int io);
extern int w1_ds2781_eeprom_cmd(struct device *dev, int addr, int cmd);
#endif /* !_W1_DS2781_H */
......@@ -38,6 +38,7 @@
#define W1_EEPROM_DS2431 0x2D
#define W1_FAMILY_DS2760 0x30
#define W1_FAMILY_DS2780 0x32
#define W1_FAMILY_DS2781 0x3D
#define W1_THERM_DS28EA00 0x42
#define MAXNAMELEN 32
......
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