On 04/12/2015 08:29 AM, Anand Moon wrote:
hi Guenter,
I am referring to #linux/drivers/pwm/pwm-samsung.c
Will update the comment.
Sure, but that doesn't help as patch description for the pwm-fan driver.
Guenter
-Anand Moon
On 12 April 2015 at 20:37, Guenter Roeck <linux@xxxxxxxxxxxx> wrote:
On 04/12/2015 07:54 AM, Anand Moon wrote:
In order to disable the PWM we need to update using following sequence.
pwm_config(pwm, 0, period);
pwm_disable(pwm);
pwm_config() with a zero duty cycle to make it clear the timer and update
the PWM registers.
pwm_disable will clear the TCON_AUTORELOAD(tcon_chan) and update the PWM
register.
There is no TCON_AUTORELOAD in this driver. Future developers will have no
idea
what you are talking about here. Please provide a generic comment.
Next change in state will get trigger unless a new PWM cycle happened.
That sentence is difficult to parse. Actually, I have no idea what it is
supposed to mean.
pwm_config(pwm, duty, period);
pwm_enable(pwm);
Through pwm_config we update the duty cycle and period and update the PWM
register.
pwm_enable will update the state to TCON_MANUALUPDATE(tcon_chan)
and TCON_START(tcon_chan) | TCON_AUTORELOAD(tcon_chan) and update the PWM
register.
This sentence does not make sense in the context of the pwm-fan driver.
Reported-by: Markus Reichl <m.reichl@xxxxxxxxxxxxx>
Tested-by: Markus Reichl <m.reichl@xxxxxxxxxxxxx>
Reviewed-by: Lukasz Majewski <l.majewski@xxxxxxxxxxx>
Reviewed-by: Sjoerd Simons <sjoerd.simons@xxxxxxxxxxxxxxx>
Signed-off-by: Anand Moon <linux.amoon@xxxxxxxxx>
---
drivers/hwmon/pwm-fan.c | 10 ++++------
1 file changed, 4 insertions(+), 6 deletions(-)
diff --git a/drivers/hwmon/pwm-fan.c b/drivers/hwmon/pwm-fan.c
index 7c83dc4..f25c841 100644
--- a/drivers/hwmon/pwm-fan.c
+++ b/drivers/hwmon/pwm-fan.c
@@ -44,26 +44,24 @@ static int __set_pwm(struct pwm_fan_ctx *ctx,
unsigned long pwm)
int ret = 0;
mutex_lock(&ctx->lock);
+
Please refrain from making unnecessary whitespace changes.
Thanks,
Guenter
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