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hwmon: (pcf8591) use permission-specific DEVICE_ATTR variants 

Use DEVICE_ATTR_RW for read/write attributes. This simplifies the source
code, improves readbility, and reduces the chance of inconsistencies.

The conversion was done automatically using coccinelle. It was validated
by compiling both the old and the new source code and comparing its text,
data, and bss size.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
[groeck: Updated description]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Julia Lawall 2016-12-22 13:05:03 +01:00 committed by Guenter Roeck
parent d0688f6ccd
commit 309c675e62
1 changed files with 11 additions and 13 deletions
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24
drivers/hwmon/pcf8591.c
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@ -103,16 +103,16 @@ show_in_channel(1);
show_in_channel(2);
show_in_channel(3);
static ssize_t show_out0_ouput(struct device *dev,
struct device_attribute *attr, char *buf)
static ssize_t out0_output_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct pcf8591_data *data = i2c_get_clientdata(to_i2c_client(dev));
return sprintf(buf, "%d\n", data->aout * 10);
}
static ssize_t set_out0_output(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
static ssize_t out0_output_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
unsigned long val;
struct i2c_client *client = to_i2c_client(dev);
@ -132,19 +132,18 @@ static ssize_t set_out0_output(struct device *dev,
return count;
}
static DEVICE_ATTR(out0_output, S_IWUSR | S_IRUGO,
show_out0_ouput, set_out0_output);
static DEVICE_ATTR_RW(out0_output);
static ssize_t show_out0_enable(struct device *dev,
static ssize_t out0_enable_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct pcf8591_data *data = i2c_get_clientdata(to_i2c_client(dev));
return sprintf(buf, "%u\n", !(!(data->control & PCF8591_CONTROL_AOEF)));
}
static ssize_t set_out0_enable(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
static ssize_t out0_enable_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct pcf8591_data *data = i2c_get_clientdata(client);
@ -165,8 +164,7 @@ static ssize_t set_out0_enable(struct device *dev,
return count;
}
static DEVICE_ATTR(out0_enable, S_IWUSR | S_IRUGO,
show_out0_enable, set_out0_enable);
static DEVICE_ATTR_RW(out0_enable);
static struct attribute *pcf8591_attributes[] = {
&dev_attr_out0_enable.attr,