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hwmon: (f75375s) Fix writes to the pwm* attribute for the F75387 

For the F75387, the register holding the current PWM duty cycle value is
r/o; changing it requires writing to the fan expect register instead.

Signed-off-by: Nikolaus Schulz <mail@microschulz.de>
[guenter.roeck@ericsson.com: Simplified function parameters]
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
hifive-unleashed-5.1
Nikolaus Schulz 2012-02-28 22:15:51 +01:00 committed by Guenter Roeck
parent 6b21d18ed5
commit 331255d35d
1 changed files with 13 additions and 5 deletions
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18
drivers/hwmon/f75375s.c
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@ -178,6 +178,16 @@ static inline void f75375_write16(struct i2c_client *client, u8 reg,
i2c_smbus_write_byte_data(client, reg + 1, (value & 0xFF));
}
static void f75375_write_pwm(struct i2c_client *client, int nr)
{
struct f75375_data *data = i2c_get_clientdata(client);
if (data->kind == f75387)
f75375_write16(client, F75375_REG_FAN_EXP(nr), data->pwm[nr]);
else
f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr),
data->pwm[nr]);
}
static struct f75375_data *f75375_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
@ -309,7 +319,7 @@ static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
mutex_lock(&data->update_lock);
data->pwm[nr] = SENSORS_LIMIT(val, 0, 255);
f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr), data->pwm[nr]);
f75375_write_pwm(client, nr);
mutex_unlock(&data->update_lock);
return count;
}
@ -374,8 +384,7 @@ static int set_pwm_enable_direct(struct i2c_client *client, int nr, int val)
f75375_write8(client, F75375_REG_FAN_TIMER, fanmode);
data->pwm_enable[nr] = val;
if (val == 0)
f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr),
data->pwm[nr]);
f75375_write_pwm(client, nr);
return 0;
}
@ -759,8 +768,7 @@ static void f75375_init(struct i2c_client *client, struct f75375_data *data,
set_pwm_enable_direct(client, 1, f75375s_pdata->pwm_enable[1]);
for (nr = 0; nr < 2; nr++) {
data->pwm[nr] = SENSORS_LIMIT(f75375s_pdata->pwm[nr], 0, 255);
f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr),
data->pwm[nr]);
f75375_write_pwm(client, nr);
}
}