提交 3903586a 编写于 作者: A Alessandro Zummo 提交者: Linus Torvalds

[PATCH] RTC subsystem: DS1672 cleanup

 - removed a duplicate error message
 - bumped driver version
 - removed some debugging messages in excess
 - refined the formatting
 - adjusted copyright notice
Signed-off-by: NAlessandro Zummo <a.zummo@towertech.it>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
上级 8a95b252
/* /*
* An rtc/i2c driver for the Dallas DS1672 * An rtc/i2c driver for the Dallas DS1672
* Copyright 2005 Alessandro Zummo * Copyright 2005-06 Tower Technologies
*
* Author: Alessandro Zummo <a.zummo@towertech.it>
* *
* This program is free software; you can redistribute it and/or modify * 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 * it under the terms of the GNU General Public License version 2 as
...@@ -11,7 +13,7 @@ ...@@ -11,7 +13,7 @@
#include <linux/i2c.h> #include <linux/i2c.h>
#include <linux/rtc.h> #include <linux/rtc.h>
#define DRV_VERSION "0.2" #define DRV_VERSION "0.3"
/* Addresses to scan: none. This chip cannot be detected. */ /* Addresses to scan: none. This chip cannot be detected. */
static unsigned short normal_i2c[] = { I2C_CLIENT_END }; static unsigned short normal_i2c[] = { I2C_CLIENT_END };
...@@ -23,9 +25,9 @@ I2C_CLIENT_INSMOD; ...@@ -23,9 +25,9 @@ I2C_CLIENT_INSMOD;
#define DS1672_REG_CNT_BASE 0 #define DS1672_REG_CNT_BASE 0
#define DS1672_REG_CONTROL 4 #define DS1672_REG_CONTROL 4
#define DS1672_REG_CONTROL_EOSC 0x80
#define DS1672_REG_TRICKLE 5 #define DS1672_REG_TRICKLE 5
#define DS1672_REG_CONTROL_EOSC 0x80
/* Prototypes */ /* Prototypes */
static int ds1672_probe(struct i2c_adapter *adapter, int address, int kind); static int ds1672_probe(struct i2c_adapter *adapter, int address, int kind);
...@@ -54,8 +56,7 @@ static int ds1672_get_datetime(struct i2c_client *client, struct rtc_time *tm) ...@@ -54,8 +56,7 @@ static int ds1672_get_datetime(struct i2c_client *client, struct rtc_time *tm)
dev_dbg(&client->dev, dev_dbg(&client->dev,
"%s: raw read data - counters=%02x,%02x,%02x,%02x\n" "%s: raw read data - counters=%02x,%02x,%02x,%02x\n"
__FUNCTION__, __FUNCTION__, buf[0], buf[1], buf[2], buf[3]);
buf[0], buf[1], buf[2], buf[3]);
time = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0]; time = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0];
...@@ -63,8 +64,7 @@ static int ds1672_get_datetime(struct i2c_client *client, struct rtc_time *tm) ...@@ -63,8 +64,7 @@ static int ds1672_get_datetime(struct i2c_client *client, struct rtc_time *tm)
dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d, " dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d, "
"mday=%d, mon=%d, year=%d, wday=%d\n", "mday=%d, mon=%d, year=%d, wday=%d\n",
__FUNCTION__, __FUNCTION__, tm->tm_sec, tm->tm_min, tm->tm_hour,
tm->tm_sec, tm->tm_min, tm->tm_hour,
tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday); tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
return 0; return 0;
...@@ -144,7 +144,6 @@ static int ds1672_get_control(struct i2c_client *client, u8 *status) ...@@ -144,7 +144,6 @@ static int ds1672_get_control(struct i2c_client *client, u8 *status)
static ssize_t show_control(struct device *dev, struct device_attribute *attr, char *buf) static ssize_t show_control(struct device *dev, struct device_attribute *attr, char *buf)
{ {
struct i2c_client *client = to_i2c_client(dev); struct i2c_client *client = to_i2c_client(dev);
char *state = "enabled";
u8 control; u8 control;
int err; int err;
...@@ -152,12 +151,9 @@ static ssize_t show_control(struct device *dev, struct device_attribute *attr, c ...@@ -152,12 +151,9 @@ static ssize_t show_control(struct device *dev, struct device_attribute *attr, c
if (err) if (err)
return err; return err;
if (control & DS1672_REG_CONTROL_EOSC) return sprintf(buf, "%s\n", (control & DS1672_REG_CONTROL_EOSC)
state = "disabled"; ? "disabled" : "enabled");
return sprintf(buf, "%s\n", state);
} }
static DEVICE_ATTR(control, S_IRUGO, show_control, NULL); static DEVICE_ATTR(control, S_IRUGO, show_control, NULL);
static struct rtc_class_ops ds1672_rtc_ops = { static struct rtc_class_ops ds1672_rtc_ops = {
...@@ -168,7 +164,6 @@ static struct rtc_class_ops ds1672_rtc_ops = { ...@@ -168,7 +164,6 @@ static struct rtc_class_ops ds1672_rtc_ops = {
static int ds1672_attach(struct i2c_adapter *adapter) static int ds1672_attach(struct i2c_adapter *adapter)
{ {
dev_dbg(&adapter->dev, "%s\n", __FUNCTION__);
return i2c_probe(adapter, &addr_data, ds1672_probe); return i2c_probe(adapter, &addr_data, ds1672_probe);
} }
...@@ -177,8 +172,6 @@ static int ds1672_detach(struct i2c_client *client) ...@@ -177,8 +172,6 @@ static int ds1672_detach(struct i2c_client *client)
int err; int err;
struct rtc_device *rtc = i2c_get_clientdata(client); struct rtc_device *rtc = i2c_get_clientdata(client);
dev_dbg(&client->dev, "%s\n", __FUNCTION__);
if (rtc) if (rtc)
rtc_device_unregister(rtc); rtc_device_unregister(rtc);
...@@ -245,10 +238,8 @@ static int ds1672_probe(struct i2c_adapter *adapter, int address, int kind) ...@@ -245,10 +238,8 @@ static int ds1672_probe(struct i2c_adapter *adapter, int address, int kind)
/* read control register */ /* read control register */
err = ds1672_get_control(client, &control); err = ds1672_get_control(client, &control);
if (err) { if (err)
dev_err(&client->dev, "%s: read error\n", __FUNCTION__);
goto exit_detach; goto exit_detach;
}
if (control & DS1672_REG_CONTROL_EOSC) if (control & DS1672_REG_CONTROL_EOSC)
dev_warn(&client->dev, "Oscillator not enabled. " dev_warn(&client->dev, "Oscillator not enabled. "
......
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