Below changes depend on following patch. https://patchwork.kernel.org/patch/5944061/ Update the pwm_config with duty then update the pwm_disable to poweroff the cpu fan. Tested on OdroidXU3 board. 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); + 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 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
