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

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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>
This commit is contained in:
eric miao 2008-01-28 23:00:02 +00:00 • committed by Russell King
commit c4d1fb627f
4 changed files with 183 additions and 14 deletions
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13
include/asm-arm/arch-pxa/pxa3xx-regs.h
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@ -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