The patch titled
Subject: drivers/rtc/rtc-tps65910.c: enable RTC power domain on initialization
has been added to the -mm tree. Its filename is
drivers-rtc-rtc-tps65910c-enable-rtc-power-domain-on-initialization.patch
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From: "Kim, Milo" <Milo.Kim@xxxxxx>
Subject: drivers/rtc/rtc-tps65910.c: enable RTC power domain on initialization
Enabling RTC HW block depends on the default value of TPS65910 register.
In some mode, RTC block is disabled by default.(eg. AM3517 Craneboard) In
this case, RTC_PWDN(RTC power down) bit should be cleared to enable the
RTC HW block.
This patch also works in case that RTC block is active by default, because
there is no side effect even if the bit is updated again.
Tested on AM3517 Craneboard.
Signed-off-by: Milo(Woogyom) Kim <milo.kim@xxxxxx>
Cc: Venu Byravarasu <vbyravarasu@xxxxxxxxxx>
Cc: Samuel Ortiz <sameo@xxxxxxxxxxxxxxx>
Cc: Sivaram Nair <sivaramn@xxxxxxxxxx>
Cc: Alessandro Zummo <a.zummo@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/rtc/rtc-tps65910.c | 7 +++++++
1 file changed, 7 insertions(+)
diff -puN drivers/rtc/rtc-tps65910.c~drivers-rtc-rtc-tps65910c-enable-rtc-power-domain-on-initialization drivers/rtc/rtc-tps65910.c
--- a/drivers/rtc/rtc-tps65910.c~drivers-rtc-rtc-tps65910c-enable-rtc-power-domain-on-initialization
+++ a/drivers/rtc/rtc-tps65910.c
@@ -247,6 +247,13 @@ static int __devinit tps65910_rtc_probe(
return ret;
dev_dbg(&pdev->dev, "Enabling rtc-tps65910.\n");
+
+ /* Enable RTC digital power domain */
+ ret = regmap_update_bits(tps65910->regmap, TPS65910_DEVCTRL,
+ DEVCTRL_RTC_PWDN_MASK, 0 << DEVCTRL_RTC_PWDN_SHIFT);
+ if (ret < 0)
+ return ret;
+
rtc_reg = TPS65910_RTC_CTRL_STOP_RTC;
ret = regmap_write(tps65910->regmap, TPS65910_RTC_CTRL, rtc_reg);
if (ret < 0)
_
Patches currently in -mm which might be from Milo.Kim@xxxxxx are
drivers-rtc-rtc-tps65910c-fix-invalid-pointer-access-on-_remove.patch
linux-next.patch
drivers-video-backlight-lp855x_blc-use-generic-pwm-functions.patch
drivers-video-backlight-lp855x_blc-use-generic-pwm-functions-fix.patch
drivers-video-backlight-lp855x_blc-remove-unnecessary-mutex-code.patch
drivers-rtc-rtc-tps65910c-enable-rtc-power-domain-on-initialization.patch
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