pwm_config() must be called with a duty cycle of 0 prior to calling
pwm_disable() to ensure that the pwm signal is set to low.
Changes since v1 : None.
Changes since v2 : None
Changes since v3 : Simplify the comment.
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 | 9 +++------
1 file changed, 3 insertions(+), 6 deletions(-)
diff --git a/drivers/hwmon/pwm-fan.c b/drivers/hwmon/pwm-fan.c
index 7c83dc4..c2a469e 100644
--- a/drivers/hwmon/pwm-fan.c
+++ b/drivers/hwmon/pwm-fan.c
@@ -47,23 +47,20 @@ static int __set_pwm(struct pwm_fan_ctx *ctx, unsigned long pwm)
if (ctx->pwm_value == pwm)
goto exit_set_pwm_err;
- if (pwm == 0) {
- pwm_disable(ctx->pwm);
- goto exit_set_pwm;
- }
-
duty = DIV_ROUND_UP(pwm * (ctx->pwm->period - 1), MAX_PWM);
ret = pwm_config(ctx->pwm, duty, ctx->pwm->period);
if (ret)
goto exit_set_pwm_err;
+ if (pwm == 0)
+ pwm_disable(ctx->pwm);
+
if (ctx->pwm_value == 0) {
ret = pwm_enable(ctx->pwm);
if (ret)
goto exit_set_pwm_err;
}
-exit_set_pwm:
ctx->pwm_value = pwm;
exit_set_pwm_err:
mutex_unlock(&ctx->lock);
--
1.9.1
--
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