From 18c701a9dbe91768e1629f1aece9d50543b3abfa Mon Sep 17 00:00:00 2001 From: "Kim, Milo" Date: Mon, 17 Dec 2012 16:02:51 -0800 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 Acked-by: Venu Byravarasu Cc: Samuel Ortiz Cc: Sivaram Nair Cc: Alessandro Zummo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/rtc/rtc-tps65910.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'drivers') diff --git a/drivers/rtc/rtc-tps65910.c b/drivers/rtc/rtc-tps65910.c index 687006f31727..22eb4ebfa1a6 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) -- cgit v1.2.3