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....@ti.com>
---
drivers/rtc/rtc-tps65910.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/rtc/rtc-tps65910.c b/drivers/rtc/rtc-tps65910.c
index e8d44bc..b4d9f02 100644
--- a/drivers/rtc/rtc-tps65910.c
+++ b/drivers/rtc/rtc-tps65910.c
@@ -247,6 +247,13 @@ static int __devinit tps65910_rtc_probe(struct
platform_device *pdev)
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)
--
1.7.9.5
Best Regards,
Milo
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