diff options
| author | Gabriele Gorla <gorlik@penguintown.net> | 2010-12-08 16:27:22 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-01-07 14:43:06 -0800 |
| commit | e0d1e27d374c3248ff5b1da6dd052127216cd0da (patch) | |
| tree | 5a1152e83d98ca1b83882422e3ec9e4a633e6d35 /drivers/hwmon | |
| parent | e2e722ca8f05cf468f497bfb5387acca64633d0a (diff) | |
hwmon: (adm1026) Fix setting fan_div
commit 52bc9802ce849d0d287cc5fe76d06b0daa3986ca upstream.
Prevent setting fan_div from stomping on other fans that share the
same I2C register.
Signed-off-by: Gabriele Gorla <gorlik@penguintown.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/adm1026.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/drivers/hwmon/adm1026.c b/drivers/hwmon/adm1026.c index 52312ab1514f..b7ba80c7b0c1 100644 --- a/drivers/hwmon/adm1026.c +++ b/drivers/hwmon/adm1026.c @@ -919,7 +919,7 @@ static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, int nr = sensor_attr->index; struct i2c_client *client = to_i2c_client(dev); struct adm1026_data *data = i2c_get_clientdata(client); - int val, orig_div, new_div, shift; + int val, orig_div, new_div; val = simple_strtol(buf, NULL, 10); new_div = DIV_TO_REG(val); @@ -929,15 +929,17 @@ static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr, data->fan_div[nr] = DIV_FROM_REG(new_div); if (nr < 4) { /* 0 <= nr < 4 */ - shift = 2 * nr; adm1026_write_value(client, ADM1026_REG_FAN_DIV_0_3, - ((DIV_TO_REG(orig_div) & (~(0x03 << shift))) | - (new_div << shift))); + (DIV_TO_REG(data->fan_div[0]) << 0) | + (DIV_TO_REG(data->fan_div[1]) << 2) | + (DIV_TO_REG(data->fan_div[2]) << 4) | + (DIV_TO_REG(data->fan_div[3]) << 6)); } else { /* 3 < nr < 8 */ - shift = 2 * (nr - 4); adm1026_write_value(client, ADM1026_REG_FAN_DIV_4_7, - ((DIV_TO_REG(orig_div) & (~(0x03 << (2 * shift)))) | - (new_div << shift))); + (DIV_TO_REG(data->fan_div[4]) << 0) | + (DIV_TO_REG(data->fan_div[5]) << 2) | + (DIV_TO_REG(data->fan_div[6]) << 4) | + (DIV_TO_REG(data->fan_div[7]) << 6)); } if (data->fan_div[nr] != orig_div) { |