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rtc: s3c: fix disabled clocks for alarm

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commit 1fb1c35f56 upstream.

The clock enable/disable codes for alarm have been removed from
commit 24e1455493 ("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>
This commit is contained in:
Joonyoung Shim
2015-08-12 19:21:46 +09:00
committed by Greg Kroah-Hartman
parent 85d1ba73e4
commit 68912df901
1 changed files with 18 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/rtc/rtc-s3c.c
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@@ -39,6 +39,7 @@ struct s3c_rtc {
void __iomem *base; void __iomem *base;
struct clk *rtc_clk; struct clk *rtc_clk;
struct clk *rtc_src_clk; struct clk *rtc_src_clk;
bool clk_disabled;
struct s3c_rtc_data *data; struct s3c_rtc_data *data;
@@ -71,9 +72,12 @@ static void s3c_rtc_enable_clk(struct s3c_rtc *info)
unsigned long irq_flags; unsigned long irq_flags;
spin_lock_irqsave(&info->alarm_clk_lock, irq_flags); spin_lock_irqsave(&info->alarm_clk_lock, irq_flags);
if (info->clk_disabled) {
clk_enable(info->rtc_clk); clk_enable(info->rtc_clk);
if (info->data->needs_src_clk) if (info->data->needs_src_clk)
clk_enable(info->rtc_src_clk); clk_enable(info->rtc_src_clk);
info->clk_disabled = false;
}
spin_unlock_irqrestore(&info->alarm_clk_lock, irq_flags); 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; unsigned long irq_flags;
spin_lock_irqsave(&info->alarm_clk_lock, irq_flags); spin_lock_irqsave(&info->alarm_clk_lock, irq_flags);
if (!info->clk_disabled) {
if (info->data->needs_src_clk) if (info->data->needs_src_clk)
clk_disable(info->rtc_src_clk); clk_disable(info->rtc_src_clk);
clk_disable(info->rtc_clk); clk_disable(info->rtc_clk);
info->clk_disabled = true;
}
spin_unlock_irqrestore(&info->alarm_clk_lock, irq_flags); 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); s3c_rtc_disable_clk(info);
if (enabled)
s3c_rtc_enable_clk(info);
else
s3c_rtc_disable_clk(info);
return 0; return 0;
} }