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authorJoonyoung Shim <jy0922.shim@samsung.com>2015-08-12 19:21:46 +0900
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-09-29 19:26:11 +0200
commit68912df901b9807a708cd1599b30fa56548d15e1 (patch)
tree20bec77ce0b52e255634f7b7047729c9756ad768
parent85d1ba73e42e8317b21ba71ab277fb762a45e6b0 (diff)
rtc: s3c: fix disabled clocks for alarm
commit 1fb1c35f56bb6ab4a65920c648154b0f78f634a5 upstream. The clock enable/disable codes for alarm have been removed from commit 24e1455493da ("drivers/rtc/rtc-s3c.c: delete duplicate clock control") and the clocks are disabled even if alarm is set, so alarm interrupt can't happen. The s3c_rtc_setaie function can be called several times with 'enabled' argument having same value, so it needs to check whether clocks are enabled or not. Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com> Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/rtc/rtc-s3c.c24
1 files changed, 18 insertions, 6 deletions
diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c
index 76cbad7a99d3..c5a2523b0185 100644
--- a/drivers/rtc/rtc-s3c.c
+++ b/drivers/rtc/rtc-s3c.c
@@ -39,6 +39,7 @@ struct s3c_rtc {
void __iomem *base;
struct clk *rtc_clk;
struct clk *rtc_src_clk;
+ bool clk_disabled;
struct s3c_rtc_data *data;
@@ -71,9 +72,12 @@ static void s3c_rtc_enable_clk(struct s3c_rtc *info)
unsigned long irq_flags;
spin_lock_irqsave(&info->alarm_clk_lock, irq_flags);
- clk_enable(info->rtc_clk);
- if (info->data->needs_src_clk)
- clk_enable(info->rtc_src_clk);
+ if (info->clk_disabled) {
+ clk_enable(info->rtc_clk);
+ if (info->data->needs_src_clk)
+ clk_enable(info->rtc_src_clk);
+ info->clk_disabled = false;
+ }
spin_unlock_irqrestore(&info->alarm_clk_lock, irq_flags);
}
@@ -82,9 +86,12 @@ static void s3c_rtc_disable_clk(struct s3c_rtc *info)
unsigned long irq_flags;
spin_lock_irqsave(&info->alarm_clk_lock, irq_flags);
- if (info->data->needs_src_clk)
- clk_disable(info->rtc_src_clk);
- clk_disable(info->rtc_clk);
+ if (!info->clk_disabled) {
+ if (info->data->needs_src_clk)
+ clk_disable(info->rtc_src_clk);
+ clk_disable(info->rtc_clk);
+ info->clk_disabled = true;
+ }
spin_unlock_irqrestore(&info->alarm_clk_lock, irq_flags);
}
@@ -128,6 +135,11 @@ static int s3c_rtc_setaie(struct device *dev, unsigned int enabled)
s3c_rtc_disable_clk(info);
+ if (enabled)
+ s3c_rtc_enable_clk(info);
+ else
+ s3c_rtc_disable_clk(info);
+
return 0;
}