From 49f783650020c62fdba4a78d4d272dca22d33662 Mon Sep 17 00:00:00 2001 From: Heiko Schocher Date: Wed, 5 Jun 2013 07:47:56 +0200 Subject: arm, am33xx: move rtc32k_enable() to common place move rtc32k_enable() to common place so all am33xx boards can use it. Signed-off-by: Heiko Schocher Cc: Matt Porter Cc: Lars Poeschel Cc: Tom Rini Cc: Enric Balletbo i Serra --- arch/arm/cpu/armv7/am33xx/board.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'arch/arm/cpu/armv7/am33xx/board.c') diff --git a/arch/arm/cpu/armv7/am33xx/board.c b/arch/arm/cpu/armv7/am33xx/board.c index 885fb2d..d3b3612 100644 --- a/arch/arm/cpu/armv7/am33xx/board.c +++ b/arch/arm/cpu/armv7/am33xx/board.c @@ -149,3 +149,21 @@ int arch_misc_init(void) #endif return 0; } + +#ifdef CONFIG_SPL_BUILD +void rtc32k_enable(void) +{ + struct rtc_regs *rtc = (struct rtc_regs *)RTC_BASE; + + /* + * Unlock the RTC's registers. For more details please see the + * RTC_SS section of the TRM. In order to unlock we need to + * write these specific values (keys) in this order. + */ + writel(0x83e70b13, &rtc->kick0r); + writel(0x95a4f1e0, &rtc->kick1r); + + /* Enable the RTC 32K OSC by setting bits 3 and 6. */ + writel((1 << 3) | (1 << 6), &rtc->osc); +} +#endif -- cgit v1.1