On Mon, 2017-06-26 at 11:43 +0300, m18063 wrote:

On 23.06.2017 08:08, Zhi Mao wrote:

quoted

Replace "7" with "PWM_CLK_DIV_MAX" in function:mtk_pwm_config()
to improve the code readablity.

Signed-off-by: Zhi Mao <zhi.mao@mediatek.com>
---
 drivers/pwm/pwm-mediatek.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/pwm/pwm-mediatek.c b/drivers/pwm/pwm-mediatek.c
index 554a042..e5f6425 100644
--- a/drivers/pwm/pwm-mediatek.c
+++ b/drivers/pwm/pwm-mediatek.c

@@ -30,6 +30,8 @@
 #define PWMDWIDTH		0x2c
 #define PWMTHRES		0x30
 
+#define PWM_CLK_DIV_MAX		7
+
 enum {
 	MTK_CLK_MAIN = 0,
 	MTK_CLK_TOP,

@@ -130,8 +132,10 @@ static int mtk_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
 		clkdiv++;
 	}
 
-	if (clkdiv > 7)
+	if (clkdiv > PWM_CLK_DIV_MAX) {

You forgot to:
		mtk_pwm_clk_disable(chip, pwm);

Hi Claudiu,

Thanks for your suggestion.
It's a problem, I will modify this in the next release.

Regards,
Zhi

quoted

+		dev_err(chip->dev, "period %d not supported\n", period_ns);
 		return -EINVAL;
+	}
 
 	mtk_pwm_writel(pc, pwm->hwpwm, PWMCON, BIT(15) | clkdiv);
 	mtk_pwm_writel(pc, pwm->hwpwm, PWMDWIDTH, period_ns / resolution);