4.2-stable review patch. If anyone has any objections, please let me know.
------------------
From: Joonyoung Shim <jy0922.shim@xxxxxxxxxxx>
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@xxxxxxxxxxx>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>
Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/rtc/rtc-s3c.c | 24 ++++++++++++++++++------
1 file changed, 18 insertions(+), 6 deletions(-)
--- 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 s3
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 s
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
s3c_rtc_disable_clk(info);
+ if (enabled)
+ s3c_rtc_enable_clk(info);
+ else
+ s3c_rtc_disable_clk(info);
+
return 0;
}
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