From: Zhi Mao <zhi.mao@mediatek.com>
Date: Fri, 30 Jun 2017 06:05:17 +0000 (+0800)
Subject: pwm: mediatek: Fix PWM source clock selection
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=cd30798a6c17c1fa182e9b0bb85bd973776ff193;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

pwm: mediatek: Fix PWM source clock selection

In original code, the PWM output frequency is not correct when set
bit<3>=1 to PWMCON register.

Signed-off-by: Zhi Mao <zhi.mao@mediatek.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Acked-by: John Crispin <john@phrozen.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---

diff --git a/drivers/pwm/pwm-mediatek.c b/drivers/pwm/pwm-mediatek.c
index 5c11bc708a3c..d08b5b3dca71 100644
--- a/drivers/pwm/pwm-mediatek.c
+++ b/drivers/pwm/pwm-mediatek.c
@@ -91,7 +91,7 @@ static int mtk_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
 	if (clkdiv > 7)
 		return -EINVAL;
 
-	mtk_pwm_writel(pc, pwm->hwpwm, PWMCON, BIT(15) | BIT(3) | clkdiv);
+	mtk_pwm_writel(pc, pwm->hwpwm, PWMCON, BIT(15) | clkdiv);
 	mtk_pwm_writel(pc, pwm->hwpwm, PWMDWIDTH, period_ns / resolution);
 	mtk_pwm_writel(pc, pwm->hwpwm, PWMTHRES, duty_ns / resolution);