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hwmon: (lm75) Modularize lm75_write and make hwmon_chip writable

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* Create two separate functions to write into hwmon_temp and hwmon_chip.
* Call the functions from lm75_write.
* Make hwm_chip writable if the chip supports more than one sample time.

Signed-off-by: Iker Perez del Palomar Sustatxa <iker.perez@codethink.co.uk>
Link: https://lore.kernel.org/r/20190808080246.8371-5-iker.perez@codethink.co.uk
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Iker Perez del Palomar Sustatxa 2019-08-08 09:02:46 +01:00 committed by Guenter Roeck
parent 7f1a300f8a
commit 4b5be3c173
1 changed files with 47 additions and 5 deletions
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52
drivers/hwmon/lm75.c
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@ -16,6 +16,7 @@
#include <linux/of_device.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/util_macros.h>
#include "lm75.h"
/*
@ -325,16 +326,12 @@ static int lm75_read(struct device *dev, enum hwmon_sensor_types type,
return 0;
}
static int lm75_write(struct device *dev, enum hwmon_sensor_types type,
u32 attr, int channel, long temp)
static int lm75_write_temp(struct device *dev, u32 attr, long temp)
{
struct lm75_data *data = dev_get_drvdata(dev);
u8 resolution;
int reg;
if (type != hwmon_temp)
return -EINVAL;
switch (attr) {
case hwmon_temp_max:
reg = LM75_REG_MAX;
@ -362,13 +359,58 @@ static int lm75_write(struct device *dev, enum hwmon_sensor_types type,
return regmap_write(data->regmap, reg, (u16)temp);
}
static int lm75_write_chip(struct device *dev, u32 attr, long val)
{
struct lm75_data *data = dev_get_drvdata(dev);
u8 index;
s32 err;
switch (attr) {
case hwmon_chip_update_interval:
index = find_closest(val, data->params->sample_times,
(int)data->params->num_sample_times);
err = lm75_write_config(data,
data->params->sample_set_masks[index],
data->params->sample_clr_mask);
if (err)
return err;
data->sample_time = data->params->sample_times[index];
if (data->params->resolutions)
data->resolution = data->params->resolutions[index];
break;
default:
return -EINVAL;
}
return 0;
}
static int lm75_write(struct device *dev, enum hwmon_sensor_types type,
u32 attr, int channel, long val)
{
switch (type) {
case hwmon_chip:
return lm75_write_chip(dev, attr, val);
case hwmon_temp:
return lm75_write_temp(dev, attr, val);
default:
return -EINVAL;
}
return 0;
}
static umode_t lm75_is_visible(const void *data, enum hwmon_sensor_types type,
u32 attr, int channel)
{
const struct lm75_data *config_data = data;
switch (type) {
case hwmon_chip:
switch (attr) {
case hwmon_chip_update_interval:
if (config_data->params->num_sample_times > 1)
return 0644;
return 0444;
}
break;