Re: [PATCH v3] hwmon: (nct7802) Add pwm control

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Hi Constantine,

On 07/04/2015 07:57 AM, Constantine Shulyupin wrote:
Added fan output control registers.
Modes of operation are PWM (default) and DC.

Introduced show_pwm, store_pwm, nct7802_pwm_attrs, nct7802_pwm_group.

---
Change log:
Fixed in v2:
- renamed fanX_output to pwmX
- introduced nct7802_pwm_group and nct7802_pwm_attrs
- renamed show_dec to show_pwd
- used kstrtou8 instead kstrtouint
Fixed in v3:
- spilt functions declarations to fit 80 columns
- removed unnecessary initializations
- rearranged variable declarations
- shortened return expression
- renamed store_u8 to store_pwm

Looks good at first glance, but ...

Signed-off-by: Constantine Shulyupin <const@xxxxxxxxxxxxx>
---
  drivers/hwmon/nct7802.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
  1 file changed, 47 insertions(+)

diff --git a/drivers/hwmon/nct7802.c b/drivers/hwmon/nct7802.c
index afa242d..6382d4d 100644
--- a/drivers/hwmon/nct7802.c
+++ b/drivers/hwmon/nct7802.c
@@ -102,6 +102,36 @@ static ssize_t store_temp_type(struct device *dev,
  	return err ? : count;
  }

+static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr,
+			char *buf)
+{
+	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+	struct nct7802_data *data = dev_get_drvdata(dev);
+	unsigned int;

... it is always a good idea to at least compile test the code
after a change, as trivial as the change may appear to be.

Thanks,
Guenter


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