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authorJoonyoung Shim <jy0922.shim@samsung.com>2011-11-04 05:39:34 +0400
committerKukjin Kim <kgene.kim@samsung.com>2011-11-06 08:53:01 +0400
commitd8633c1da161de7e0b880d919d305a97c01372f4 (patch)
tree39848e1f3c3b155e214e819faafe30ff4185149b /arch/arm/plat-samsung
parent8088041ee35604640760321621e3f058ea2c7061 (diff)
downloadlinux-d8633c1da161de7e0b880d919d305a97c01372f4.tar.xz
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 <jy0922.shim@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Diffstat (limited to 'arch/arm/plat-samsung')
-rw-r--r--arch/arm/plat-samsung/pwm.c7
1 files changed, 7 insertions, 0 deletions
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);