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ARM: at91/pm: standby mode uses same sram function as suspend to memory mode

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To simply the PM code, the suspend to standby mode uses same sram function
as the suspend to memory mode, running in the internal SRAM, instead of the
respective code for each mode.

For the suspend to standby mode, the master clock doesn't switch to the slow
clock, and PLLA and the main oscillator doesn't turn off as well.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Tested-by: Sylvain Rochet <sylvain.rochet@finsecur.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
This commit is contained in:
Wenyou Yang
2015-03-09 11:49:46 +08:00
committed by Nicolas Ferre
parent d94e688cae
commit 23be4be5a6
3 changed files with 75 additions and 49 deletions
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10
arch/arm/mach-at91/pm.h
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@@ -15,6 +15,14 @@
#include <mach/at91_ramc.h>
#define AT91_PM_MEMTYPE_MASK 0x0f
#define AT91_PM_MODE_OFFSET 4
#define AT91_PM_MODE_MASK 0x01
#define AT91_PM_MODE(x) (((x) & AT91_PM_MODE_MASK) << AT91_PM_MODE_OFFSET)
#define AT91_PM_SLOW_CLOCK 0x01
/*
* The AT91RM9200 goes into self-refresh mode with this command, and will
* terminate self-refresh automatically on the next SDRAM access.
@@ -25,6 +33,7 @@
* still in self-refresh is "not recommended", but seems to work.
*/
#ifndef __ASSEMBLY__
static inline void at91rm9200_standby(void)
{
u32 lpr = at91_ramc_read(0, AT91RM9200_SDRAMC_LPR);
@@ -106,3 +115,4 @@ static inline void at91sam9_sdram_standby(void)
}
#endif
#endif