diff options
| author | Guenter Roeck <linux@roeck-us.net> | 2012-01-27 17:56:06 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-02-03 09:19:01 -0800 |
| commit | 70c3e9e41475dd3d7dbd816130ff8c21e6e1f745 (patch) | |
| tree | 9f0f8f8e34a3d3dca502df80208caafa1e09380f /drivers | |
| parent | c39714f1da06b21e4d4250d030448099912ae79f (diff) | |
| download | lwn-70c3e9e41475dd3d7dbd816130ff8c21e6e1f745.tar.gz lwn-70c3e9e41475dd3d7dbd816130ff8c21e6e1f745.zip | |
hwmon: (w83627ehf) Disable setting DC mode for pwm2, pwm3 on NCT6776F
commit ad77c3e1808f07fa70f707b1c92a683b7c7d3f85 upstream.
NCT6776F only supports pwm mode for pwm2 and pwm3. Return error if an attempt
is made to set those pwm channels to DC mode.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/hwmon/w83627ehf.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/hwmon/w83627ehf.c b/drivers/hwmon/w83627ehf.c index 4b2fc50c84fe..628451572455 100644 --- a/drivers/hwmon/w83627ehf.c +++ b/drivers/hwmon/w83627ehf.c @@ -1295,6 +1295,7 @@ store_pwm_mode(struct device *dev, struct device_attribute *attr, { struct w83627ehf_data *data = dev_get_drvdata(dev); struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); + struct w83627ehf_sio_data *sio_data = dev->platform_data; int nr = sensor_attr->index; unsigned long val; int err; @@ -1306,6 +1307,11 @@ store_pwm_mode(struct device *dev, struct device_attribute *attr, if (val > 1) return -EINVAL; + + /* On NCT67766F, DC mode is only supported for pwm1 */ + if (sio_data->kind == nct6776 && nr && val != 1) + return -EINVAL; + mutex_lock(&data->update_lock); reg = w83627ehf_read_value(data, W83627EHF_REG_PWM_ENABLE[nr]); data->pwm_mode[nr] = val; |