diff options
author | Alexandre Belloni <alexandre.belloni@free-electrons.com> | 2015-03-16 23:44:37 +0100 |
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committer | Nicolas Ferre <nicolas.ferre@atmel.com> | 2015-04-05 21:59:51 +0200 |
commit | a18d0699dd18ba5661c321ebd67e6056656b6765 (patch) | |
tree | 131281f6c0a20c7dc7d7d6296193ff19ed66b152 /arch/arm/mach-at91/pm.h | |
parent | 176a1b3dadf08835b9435bed4957daa066702a39 (diff) |
ARM: at91/pm: move the standby functions to pm.c
The standby functions are now only used in pm.c, move them there.
Also, they are not inlined as a pointer to those functions is passed to the
cpuidle driver.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Diffstat (limited to 'arch/arm/mach-at91/pm.h')
-rw-r--r-- | arch/arm/mach-at91/pm.h | 92 |
1 files changed, 0 insertions, 92 deletions
diff --git a/arch/arm/mach-at91/pm.h b/arch/arm/mach-at91/pm.h index dcacfa1ad3fa..3223967d3460 100644 --- a/arch/arm/mach-at91/pm.h +++ b/arch/arm/mach-at91/pm.h @@ -23,96 +23,4 @@ #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. - * - * Self-refresh mode is exited as soon as a memory access is made, but we don't - * know for sure when that happens. However, we need to restore the low-power - * mode if it was enabled before going idle. Restoring low-power mode while - * 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); - - asm volatile( - "b 1f\n\t" - ".align 5\n\t" - "1: mcr p15, 0, %0, c7, c10, 4\n\t" - " str %0, [%1, %2]\n\t" - " str %3, [%1, %4]\n\t" - " mcr p15, 0, %0, c7, c0, 4\n\t" - " str %5, [%1, %2]" - : - : "r" (0), "r" (at91_ramc_base[0]), "r" (AT91RM9200_SDRAMC_LPR), - "r" (1), "r" (AT91RM9200_SDRAMC_SRR), - "r" (lpr)); -} - -/* We manage both DDRAM/SDRAM controllers, we need more than one value to - * remember. - */ -static inline void at91_ddr_standby(void) -{ - /* Those two values allow us to delay self-refresh activation - * to the maximum. */ - u32 lpr0, lpr1 = 0; - u32 saved_lpr0, saved_lpr1 = 0; - - if (at91_ramc_base[1]) { - saved_lpr1 = at91_ramc_read(1, AT91_DDRSDRC_LPR); - lpr1 = saved_lpr1 & ~AT91_DDRSDRC_LPCB; - lpr1 |= AT91_DDRSDRC_LPCB_SELF_REFRESH; - } - - saved_lpr0 = at91_ramc_read(0, AT91_DDRSDRC_LPR); - lpr0 = saved_lpr0 & ~AT91_DDRSDRC_LPCB; - lpr0 |= AT91_DDRSDRC_LPCB_SELF_REFRESH; - - /* self-refresh mode now */ - at91_ramc_write(0, AT91_DDRSDRC_LPR, lpr0); - if (at91_ramc_base[1]) - at91_ramc_write(1, AT91_DDRSDRC_LPR, lpr1); - - cpu_do_idle(); - - at91_ramc_write(0, AT91_DDRSDRC_LPR, saved_lpr0); - if (at91_ramc_base[1]) - at91_ramc_write(1, AT91_DDRSDRC_LPR, saved_lpr1); -} - -/* We manage both DDRAM/SDRAM controllers, we need more than one value to - * remember. - */ -static inline void at91sam9_sdram_standby(void) -{ - u32 lpr0, lpr1 = 0; - u32 saved_lpr0, saved_lpr1 = 0; - - if (at91_ramc_base[1]) { - saved_lpr1 = at91_ramc_read(1, AT91_SDRAMC_LPR); - lpr1 = saved_lpr1 & ~AT91_SDRAMC_LPCB; - lpr1 |= AT91_SDRAMC_LPCB_SELF_REFRESH; - } - - saved_lpr0 = at91_ramc_read(0, AT91_SDRAMC_LPR); - lpr0 = saved_lpr0 & ~AT91_SDRAMC_LPCB; - lpr0 |= AT91_SDRAMC_LPCB_SELF_REFRESH; - - /* self-refresh mode now */ - at91_ramc_write(0, AT91_SDRAMC_LPR, lpr0); - if (at91_ramc_base[1]) - at91_ramc_write(1, AT91_SDRAMC_LPR, lpr1); - - cpu_do_idle(); - - at91_ramc_write(0, AT91_SDRAMC_LPR, saved_lpr0); - if (at91_ramc_base[1]) - at91_ramc_write(1, AT91_SDRAMC_LPR, saved_lpr1); -} - -#endif #endif |