From d8633c1da161de7e0b880d919d305a97c01372f4 Mon Sep 17 00:00:00 2001 From: Joonyoung Shim Date: Fri, 4 Nov 2011 10:39:34 +0900 Subject: [PATCH] ARM: SAMSUNG: Add clk enable/disable of pwm PWM timers use pclk("timers" clk) as parent clk. If this pclk is the disabled state when PWM driver is probed, then it causes wrong read and write operation about registers of PWM. Signed-off-by: Joonyoung Shim Signed-off-by: Kyungmin Park Signed-off-by: Kukjin Kim --- arch/arm/plat-samsung/pwm.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/arm/plat-samsung/pwm.c b/arch/arm/plat-samsung/pwm.c index f37457c52064..dc1185dcf80d 100644 --- a/arch/arm/plat-samsung/pwm.c +++ b/arch/arm/plat-samsung/pwm.c @@ -299,6 +299,9 @@ static int s3c_pwm_probe(struct platform_device *pdev) goto err_clk_tin; } + clk_enable(pwm->clk); + clk_enable(pwm->clk_div); + local_irq_save(flags); tcon = __raw_readl(S3C2410_TCON); @@ -326,6 +329,8 @@ static int s3c_pwm_probe(struct platform_device *pdev) return 0; err_clk_tdiv: + clk_disable(pwm->clk_div); + clk_disable(pwm->clk); clk_put(pwm->clk_div); err_clk_tin: @@ -340,6 +345,8 @@ static int __devexit s3c_pwm_remove(struct platform_device *pdev) { struct pwm_device *pwm = platform_get_drvdata(pdev); + clk_disable(pwm->clk_div); + clk_disable(pwm->clk); clk_put(pwm->clk_div); clk_put(pwm->clk); kfree(pwm); -- 2.20.1