Hi Jean,
W83792D use pwm register low 4 bits to store fan PWM/DC value, bit 7 is used to store fan PWM/DC mode,
The store_pwm function use a wrong limit 0-255, so it may change the fan mode when set value is large than 127.
This fix the problem. Change the "index" value of pwm*_mode and pwm* SENSOR_ATTR to simplify code.
Signed-off-by: Yuan Mu <ymu at winbond.com.tw>
---
w83792d.c | 59 +++++++++++++++++++++++++++--------------------------------
1 file changed, 27 insertions(+), 32 deletions(-)
--- linux-2.6.17-rc2.orig/drivers/hwmon/w83792d.c 2006-04-19 18:04:04.000000000 +0800
+++ linux-2.6.17-rc2/drivers/hwmon/w83792d.c 2006-04-19 18:07:05.000000000 +0800
@@ -250,8 +250,6 @@ FAN_TO_REG(long rpm, int div)
: (val)) / 1000, 0, 0xff))
#define TEMP_ADD_TO_REG_LOW(val) ((val%1000) ? 0x80 : 0x00)
-#define PWM_FROM_REG(val) (val)
-#define PWM_TO_REG(val) (SENSORS_LIMIT((val),0,255))
#define DIV_FROM_REG(val) (1 << (val))
static inline u8
@@ -288,10 +286,8 @@ struct w83792d_data {
u8 temp1[3]; /* current, over, thyst */
u8 temp_add[2][6]; /* Register value */
u8 fan_div[7]; /* Register encoding, shifted right */
- u8 pwm[7]; /* We only consider the first 3 set of pwm,
- although 792 chip has 7 set of pwm. */
+ u8 pwm[7]; /* Register value */
u8 pwmenable[3];
- u8 pwm_mode[7]; /* indicates PWM or DC mode: 1->PWM; 0->DC */
u32 alarms; /* realtime status register encoding,combined */
u8 chassis; /* Chassis status */
u8 chassis_clear; /* CLR_CHS, clear chassis intrusion detection */
@@ -627,7 +623,8 @@ show_pwm(struct device *dev, struct devi
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct w83792d_data *data = w83792d_update_device(dev);
- return sprintf(buf, "%ld\n", (long) PWM_FROM_REG(data->pwm[nr-1]));
+
+ return sprintf(buf, "%d\n", data->pwm[nr] & 0x0f);
}
static ssize_t
@@ -659,14 +656,16 @@ store_pwm(struct device *dev, struct dev
const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
- int nr = sensor_attr->index - 1;
+ int nr = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct w83792d_data *data = i2c_get_clientdata(client);
- u32 val;
+ u8 val = data->pwm[nr] & 0xf0;
- val = simple_strtoul(buf, NULL, 10);
- data->pwm[nr] = PWM_TO_REG(val);
- w83792d_write_value(client, W83792D_REG_PWM[nr], data->pwm[nr]);
+ val |= SENSORS_LIMIT(simple_strtoul(buf, NULL, 10), 0, 0x0f);
+ if (val != data->pwm[nr]) {
+ data->pwm[nr] = val;
+ w83792d_write_value(client, W83792D_REG_PWM[nr], val);
+ }
return count;
}
@@ -707,9 +706,9 @@ store_pwmenable(struct device *dev, stru
}
static struct sensor_device_attribute sda_pwm[] = {
- SENSOR_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 1),
- SENSOR_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 2),
- SENSOR_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 3),
+ SENSOR_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 0),
+ SENSOR_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 1),
+ SENSOR_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, store_pwm, 2),
};
static struct sensor_device_attribute sda_pwm_enable[] = {
SENSOR_ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
@@ -728,7 +727,7 @@ show_pwm_mode(struct device *dev, struct
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct w83792d_data *data = w83792d_update_device(dev);
- return sprintf(buf, "%d\n", data->pwm_mode[nr-1]);
+ return sprintf(buf, "%d\n", data->pwm[nr] >> 7);
}
static ssize_t
@@ -736,29 +735,28 @@ store_pwm_mode(struct device *dev, struc
const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
- int nr = sensor_attr->index - 1;
+ int nr = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct w83792d_data *data = i2c_get_clientdata(client);
- u32 val;
- u8 pwm_mode_mask = 0;
+ u8 val = data->pwm[nr] & 0x7f;
- val = simple_strtoul(buf, NULL, 10);
- data->pwm_mode[nr] = SENSORS_LIMIT(val, 0, 1);
- pwm_mode_mask = w83792d_read_value(client,
- W83792D_REG_PWM[nr]) & 0x7f;
- w83792d_write_value(client, W83792D_REG_PWM[nr],
- ((data->pwm_mode[nr]) << 7) | pwm_mode_mask);
+ val |= SENSORS_LIMIT(simple_strtol(buf, NULL, 10), 0, 1) ? 0x80 : 0;
+
+ if (val != data->pwm[nr]) {
+ data->pwm[nr] = val;
+ w83792d_write_value(client, W83792D_REG_PWM[nr], val);
+ }
return count;
}
static struct sensor_device_attribute sda_pwm_mode[] = {
SENSOR_ATTR(pwm1_mode, S_IWUSR | S_IRUGO,
- show_pwm_mode, store_pwm_mode, 1),
+ show_pwm_mode, store_pwm_mode, 0),
SENSOR_ATTR(pwm2_mode, S_IWUSR | S_IRUGO,
- show_pwm_mode, store_pwm_mode, 2),
+ show_pwm_mode, store_pwm_mode, 1),
SENSOR_ATTR(pwm3_mode, S_IWUSR | S_IRUGO,
- show_pwm_mode, store_pwm_mode, 3),
+ show_pwm_mode, store_pwm_mode, 2),
};
@@ -1373,7 +1371,7 @@ static struct w83792d_data *w83792d_upda
struct i2c_client *client = to_i2c_client(dev);
struct w83792d_data *data = i2c_get_clientdata(client);
int i, j;
- u8 reg_array_tmp[4], pwm_array_tmp[7], reg_tmp;
+ u8 reg_array_tmp[4], reg_tmp;
mutex_lock(&data->update_lock);
@@ -1402,10 +1400,8 @@ static struct w83792d_data *w83792d_upda
data->fan_min[i] = w83792d_read_value(client,
W83792D_REG_FAN_MIN[i]);
/* Update the PWM/DC Value and PWM/DC flag */
- pwm_array_tmp[i] = w83792d_read_value(client,
+ data->pwm[i] = w83792d_read_value(client,
W83792D_REG_PWM[i]);
- data->pwm[i] = pwm_array_tmp[i] & 0x0f;
- data->pwm_mode[i] = pwm_array_tmp[i] >> 7;
}
reg_tmp = w83792d_read_value(client, W83792D_REG_FAN_CFG);
@@ -1513,7 +1509,6 @@ static void w83792d_print_debug(struct w
dev_dbg(dev, "fan[%d] is: 0x%x\n", i, data->fan[i]);
dev_dbg(dev, "fan[%d] min is: 0x%x\n", i, data->fan_min[i]);
dev_dbg(dev, "pwm[%d] is: 0x%x\n", i, data->pwm[i]);
- dev_dbg(dev, "pwm_mode[%d] is: 0x%x\n", i, data->pwm_mode[i]);
}
dev_dbg(dev, "3 set of Temperatures: =====>\n");
for (i=0; i<3; i++) {
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