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hwmon: (w83791d) add pwm_enable support 

Add support for pwm_enable.

Signed-off-by: Marc Hulsman <m.hulsman@tudelft.nl>
Acked-by: Hans de Goede <j.w.r.degoede@hhs.nl>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Marc Hulsman 2008-10-17 17:51:17 +02:00 committed by Jean Delvare
parent 6495ce1840
commit b5938f8c4a
2 changed files with 91 additions and 1 deletions
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13
Documentation/hwmon/w83791d
View File

@ -108,6 +108,17 @@ going forward.
The driver reads the hardware chip values at most once every three seconds.
User mode code requesting values more often will receive cached values.
/sys files
----------
The sysfs-interface is documented in the 'sysfs-interface' file. Only
chip-specific options are documented here.
pwm[1-3]_enable - this file controls mode of fan/temperature control for
fan 1-3. Fan/PWM 4-5 only support manual mode.
* 1 Manual mode
* 2 Thermal Cruise mode (no further support)
* 3 Fan Speed Cruise mode (no further support)
Alarms bitmap vs. beep_mask bitmask
------------------------------------
For legacy code using the alarms and beep_mask files:
@ -138,4 +149,4 @@ global_enable: alarms: -------- beep_mask: 0x800000 (modified via beep_enable)
W83791D TODO:
---------------
Provide a patch for smart-fan control (still need appropriate motherboard/fans)
Provide a patch for Thermal Cruise registers.

79
drivers/hwmon/w83791d.c
View File

@ -287,6 +287,8 @@ struct w83791d_data {
/* PWMs */
u8 pwm[5]; /* pwm duty cycle */
u8 pwm_enable[3]; /* pwm enable status for fan 1-3
(fan 4-5 only support manual mode) */
/* Misc */
u32 alarms; /* realtime status register encoding,combined */
@ -707,6 +709,71 @@ static struct sensor_device_attribute sda_pwm[] = {
show_pwm, store_pwm, 4),
};
static ssize_t show_pwmenable(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct w83791d_data *data = w83791d_update_device(dev);
return sprintf(buf, "%u\n", data->pwm_enable[nr] + 1);
}
static ssize_t store_pwmenable(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
struct i2c_client *client = to_i2c_client(dev);
struct w83791d_data *data = i2c_get_clientdata(client);
int nr = sensor_attr->index;
unsigned long val;
u8 reg_cfg_tmp;
u8 reg_idx = 0;
u8 val_shift = 0;
u8 keep_mask = 0;
int ret = strict_strtoul(buf, 10, &val);
if (ret || val < 1 || val > 3)
return -EINVAL;
mutex_lock(&data->update_lock);
data->pwm_enable[nr] = val - 1;
switch (nr) {
case 0:
reg_idx = 0;
val_shift = 2;
keep_mask = 0xf3;
break;
case 1:
reg_idx = 0;
val_shift = 4;
keep_mask = 0xcf;
break;
case 2:
reg_idx = 1;
val_shift = 2;
keep_mask = 0xf3;
break;
}
reg_cfg_tmp = w83791d_read(client, W83791D_REG_FAN_CFG[reg_idx]);
reg_cfg_tmp = (reg_cfg_tmp & keep_mask) |
data->pwm_enable[nr] << val_shift;
w83791d_write(client, W83791D_REG_FAN_CFG[reg_idx], reg_cfg_tmp);
mutex_unlock(&data->update_lock);
return count;
}
static struct sensor_device_attribute sda_pwmenable[] = {
SENSOR_ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
show_pwmenable, store_pwmenable, 0),
SENSOR_ATTR(pwm2_enable, S_IWUSR | S_IRUGO,
show_pwmenable, store_pwmenable, 1),
SENSOR_ATTR(pwm3_enable, S_IWUSR | S_IRUGO,
show_pwmenable, store_pwmenable, 2),
};
/* read/write the temperature1, includes measured value and limits */
static ssize_t show_temp1(struct device *dev, struct device_attribute *devattr,
char *buf)
@ -974,6 +1041,9 @@ static struct attribute *w83791d_attributes[] = {
&sda_pwm[0].dev_attr.attr,
&sda_pwm[1].dev_attr.attr,
&sda_pwm[2].dev_attr.attr,
&sda_pwmenable[0].dev_attr.attr,
&sda_pwmenable[1].dev_attr.attr,
&sda_pwmenable[2].dev_attr.attr,
NULL
};
@ -1325,6 +1395,15 @@ static struct w83791d_data *w83791d_update_device(struct device *dev)
W83791D_REG_PWM[i]);
}
/* Update PWM enable status */
for (i = 0; i < 2; i++) {
reg_array_tmp[i] = w83791d_read(client,
W83791D_REG_FAN_CFG[i]);
}
data->pwm_enable[0] = (reg_array_tmp[0] >> 2) & 0x03;
data->pwm_enable[1] = (reg_array_tmp[0] >> 4) & 0x03;
data->pwm_enable[2] = (reg_array_tmp[1] >> 2) & 0x03;
/* Update the first temperature sensor */
for (i = 0; i < 3; i++) {
data->temp1[i] = w83791d_read(client,