am335x: Enable RTC 32K OSC clock

In order to support low power state, you must source kernel system
timers to persistent clock, available across suspend/resume.  In case of
AM335x device, the only source we have is, RTC32K, available in
wakeup/always-on domain.  Having said that, during validation it has
been observed that, RTC clock need couple of seconds delay to stabilize
the RTC OSC clock; and such a huge delay is not acceptable in kernel
especially during early init and also it will impact quick/fast boot
use-cases.

So, RTC32k OSC enable dependency has been shifted to
SPL/first-bootloader.

Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com>
Signed-off-by: Tom Rini <trini@ti.com>
diff --git a/arch/arm/include/asm/arch-am33xx/hardware.h b/arch/arm/include/asm/arch-am33xx/hardware.h
index 62332f2..5bd4bc8 100644
--- a/arch/arm/include/asm/arch-am33xx/hardware.h
+++ b/arch/arm/include/asm/arch-am33xx/hardware.h
@@ -61,6 +61,7 @@
 #define CM_WKUP				0x44E00400
 #define CM_DPLL				0x44E00500
 #define CM_DEVICE			0x44E00700
+#define CM_RTC				0x44E00800
 #define CM_CEFUSE			0x44E00A00
 #define PRM_DEVICE			0x44E00F00
 
@@ -83,4 +84,7 @@
 #define AM335X_CPSW_BASE		0x4A100000
 #define AM335X_CPSW_MDIO_BASE		0x4A101000
 
+/* RTC base address */
+#define AM335X_RTC_BASE			0x44E3E000
+
 #endif /* __AM33XX_HARDWARE_H */