diff options
| author | Gabriele Gorla <gorlik@penguintown.net> | 2010-12-08 16:27:22 +0100 |
|---|---|---|
| committer | Paul Gortmaker <paul.gortmaker@windriver.com> | 2011-04-17 16:16:08 -0400 |
| commit | a17cb3a023a04e88b0e97fa282efa56ccf81a30f (patch) | |
| tree | 2c4e6b86d8da5f7687d05bf62a691cc2cdbcef4f /drivers/hwmon | |
| parent | 65b35399d24e70a59f3200749c5190584d586731 (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: Paul Gortmaker <paul.gortmaker@windriver.com>
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 e059a5f8025..9975bbfb1b3 100644 --- a/drivers/hwmon/adm1026.c +++ b/drivers/hwmon/adm1026.c @@ -916,7 +916,7 @@ 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); @@ -926,15 +926,17 @@ 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) { |