[ARM] pxa: add preliminary suspend/resume code for pxa3xx

1. clear RDH bit after resuming back from D3, otherwise, the multi function
   pins will retain the low power state

2. save/restore essential system registers

Signed-off-by: eric miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 13 insertions, 0 deletions

diff --git a/include/asm-arm/arch-pxa/pxa3xx-regs.h b/include/asm-arm/arch-pxa/pxa3xx-regs.h
index 66d54119757c..8e1b3ead827f 100644
--- a/include/asm-arm/arch-pxa/pxa3xx-regs.h
+++ b/include/asm-arm/arch-pxa/pxa3xx-regs.h
@@ -12,6 +12,19 @@
 
 #ifndef __ASM_ARCH_PXA3XX_REGS_H
 #define __ASM_ARCH_PXA3XX_REGS_H
+/*
+ * Service Power Management Unit (MPMU)
+ */
+#define PMCR            __REG(0x40F50000)       /* Power Manager Control Register */
+#define PSR             __REG(0x40F50004)       /* Power Manager S2 Status Register */
+#define PSPR            __REG(0x40F50008)       /* Power Manager Scratch Pad Register */
+#define PCFR            __REG(0x40F5000C)       /* Power Manager General Configuration Register */
+#define PWER            __REG(0x40F50010)       /* Power Manager Wake-up Enable Register */
+#define PWSR            __REG(0x40F50014)       /* Power Manager Wake-up Status Register */
+#define PECR            __REG(0x40F50018)       /* Power Manager EXT_WAKEUP[1:0] Control Register */
+#define DCDCSR          __REG(0x40F50080)       /* DC-DC Controller Status Register */
+#define PVCR            __REG(0x40F50100)       /* Power Manager Voltage Change Control Register */
+#define PCMD(x)         __REG(0x40F50110 + ((x) << 2))
 
 /*
  * Slave Power Managment Unit