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authorHeiko Schocher <hs@denx.de>2013-06-05 07:47:56 +0200
committerTom Rini <trini@ti.com>2013-06-18 09:12:38 -0400
commit49f783650020c62fdba4a78d4d272dca22d33662 (patch)
treea9b97016b29298b4b6becca98514f9b8e5462a72 /arch
parent847e6693ccb529bf8346db62876f38f0c4e04ade (diff)
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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 <hs@denx.de> Cc: Matt Porter <mporter@ti.com> Cc: Lars Poeschel <poeschel@lemonage.de> Cc: Tom Rini <trini@ti.com> Cc: Enric Balletbo i Serra <eballetbo@iseebcn.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/cpu/armv7/am33xx/board.c18
-rw-r--r--arch/arm/include/asm/arch-am33xx/sys_proto.h2
2 files changed, 20 insertions, 0 deletions
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
diff --git a/arch/arm/include/asm/arch-am33xx/sys_proto.h b/arch/arm/include/asm/arch-am33xx/sys_proto.h
index fedc674..6cce5a5 100644
--- a/arch/arm/include/asm/arch-am33xx/sys_proto.h
+++ b/arch/arm/include/asm/arch-am33xx/sys_proto.h
@@ -41,4 +41,6 @@ void gpmc_init(void);
void enable_gpmc_cs_config(const u32 *gpmc_config, struct gpmc_cs *cs, u32 base,
u32 size);
void omap_nand_switch_ecc(uint32_t, uint32_t);
+
+void rtc32k_enable(void);
#endif