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author | Olof Johansson <olof@lixom.net> | 2012-02-07 23:12:42 (GMT) |
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committer | Olof Johansson <olof@lixom.net> | 2012-02-07 23:12:42 (GMT) |
commit | 018b5e162531456aa22561024c4e9a324eae9f76 (patch) | |
tree | 71bf0730b78d686385c7a44696dcb21a5f08c8bf /arch | |
parent | 684852315dea655f788f6f1006a14b8ab86478fd (diff) | |
parent | 00482a4078f4ff0dd0638e7f2fd83e34cc402ff7 (diff) | |
download | linux-fsl-qoriq-018b5e162531456aa22561024c4e9a324eae9f76.tar.xz |
Merge branch 'at91-3.4-base+pm_cleanup' of git://github.com/at91linux/linux-at91 into at91/pm_cleanup
* 'at91-3.4-base+pm_cleanup' of git://github.com/at91linux/linux-at91:
ARM: at91: implement the standby function for pm/cpuidle
ARM: at91: remove wait_for_interrupt definition
ARM: at91: declare header name
ARM: at91: coding style fixes
Diffstat (limited to 'arch')
-rw-r--r-- | arch/arm/mach-at91/cpuidle.c | 11 | ||||
-rw-r--r-- | arch/arm/mach-at91/pm.c | 12 | ||||
-rw-r--r-- | arch/arm/mach-at91/pm.h | 73 |
3 files changed, 51 insertions, 45 deletions
diff --git a/arch/arm/mach-at91/cpuidle.c b/arch/arm/mach-at91/cpuidle.c index a851e6c..555d956 100644 --- a/arch/arm/mach-at91/cpuidle.c +++ b/arch/arm/mach-at91/cpuidle.c @@ -39,20 +39,15 @@ static int at91_enter_idle(struct cpuidle_device *dev, { struct timeval before, after; int idle_time; - u32 saved_lpr; local_irq_disable(); do_gettimeofday(&before); if (index == 0) /* Wait for interrupt state */ cpu_do_idle(); - else if (index == 1) { - asm("b 1f; .align 5; 1:"); - asm("mcr p15, 0, r0, c7, c10, 4"); /* drain write buffer */ - saved_lpr = sdram_selfrefresh_enable(); - cpu_do_idle(); - sdram_selfrefresh_disable(saved_lpr); - } + else if (index == 1) + at91_standby(); + do_gettimeofday(&after); local_irq_enable(); idle_time = (after.tv_sec - before.tv_sec) * USEC_PER_SEC + diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c index 87be5aa..d554e67 100644 --- a/arch/arm/mach-at91/pm.c +++ b/arch/arm/mach-at91/pm.c @@ -198,7 +198,6 @@ extern u32 at91_slow_clock_sz; static int at91_pm_enter(suspend_state_t state) { - u32 saved_lpr; at91_gpio_suspend(); at91_irq_suspend(); @@ -254,16 +253,7 @@ static int at91_pm_enter(suspend_state_t state) * For ARM 926 based chips, this requirement is weaker * as at91sam9 can access a RAM in self-refresh mode. */ - asm volatile ( "mov r0, #0\n\t" - "b 1f\n\t" - ".align 5\n\t" - "1: mcr p15, 0, r0, c7, c10, 4\n\t" - : /* no output */ - : /* no input */ - : "r0"); - saved_lpr = sdram_selfrefresh_enable(); - wait_for_interrupt_enable(); - sdram_selfrefresh_disable(saved_lpr); + at91_standby(); break; case PM_SUSPEND_ON: diff --git a/arch/arm/mach-at91/pm.h b/arch/arm/mach-at91/pm.h index 218d816..bba9ce1 100644 --- a/arch/arm/mach-at91/pm.h +++ b/arch/arm/mach-at91/pm.h @@ -1,3 +1,16 @@ +/* + * AT91 Power Management + * + * Copyright (C) 2005 David Brownell + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ +#ifndef __ARCH_ARM_MACH_AT91_PM +#define __ARCH_ARM_MACH_AT91_PM + #ifdef CONFIG_ARCH_AT91RM9200 #include <mach/at91rm9200_mc.h> @@ -11,18 +24,25 @@ * still in self-refresh is "not recommended", but seems to work. */ -static inline u32 sdram_selfrefresh_enable(void) +static inline void at91rm9200_standby(void) { - u32 saved_lpr = at91_sys_read(AT91_SDRAMC_LPR); - - at91_sys_write(AT91_SDRAMC_LPR, 0); - at91_sys_write(AT91_SDRAMC_SRR, 1); - return saved_lpr; + u32 lpr = at91_sys_read(AT91_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_BASE_SYS), "r" (AT91_SDRAMC_LPR), + "r" (1), "r" (AT91_SDRAMC_SRR), + "r" (lpr)); } -#define sdram_selfrefresh_disable(saved_lpr) at91_sys_write(AT91_SDRAMC_LPR, saved_lpr) -#define wait_for_interrupt_enable() asm volatile ("mcr p15, 0, %0, c7, c0, 4" \ - : : "r" (0)) +#define at91_standby at91rm9200_standby #elif defined(CONFIG_ARCH_AT91SAM9G45) #include <mach/at91sam9_ddrsdr.h> @@ -30,14 +50,12 @@ static inline u32 sdram_selfrefresh_enable(void) /* We manage both DDRAM/SDRAM controllers, we need more than one value to * remember. */ -static u32 saved_lpr1; - -static inline u32 sdram_selfrefresh_enable(void) +static inline void at91sam9g45_standby(void) { - /* Those tow values allow us to delay self-refresh activation + /* Those two values allow us to delay self-refresh activation * to the maximum. */ u32 lpr0, lpr1; - u32 saved_lpr0; + u32 saved_lpr0, saved_lpr1; saved_lpr1 = at91_ramc_read(1, AT91_DDRSDRC_LPR); lpr1 = saved_lpr1 & ~AT91_DDRSDRC_LPCB; @@ -51,15 +69,13 @@ static inline u32 sdram_selfrefresh_enable(void) at91_ramc_write(0, AT91_DDRSDRC_LPR, lpr0); at91_ramc_write(1, AT91_DDRSDRC_LPR, lpr1); - return saved_lpr0; + cpu_do_idle(); + + at91_ramc_write(0, AT91_DDRSDRC_LPR, saved_lpr0); + at91_ramc_write(1, AT91_DDRSDRC_LPR, saved_lpr1); } -#define sdram_selfrefresh_disable(saved_lpr0) \ - do { \ - at91_ramc_write(0, AT91_DDRSDRC_LPR, saved_lpr0); \ - at91_ramc_write(1, AT91_DDRSDRC_LPR, saved_lpr1); \ - } while (0) -#define wait_for_interrupt_enable() cpu_do_idle() +#define at91_standby at91sam9g45_standby #else #include <mach/at91sam9_sdramc.h> @@ -72,18 +88,23 @@ static inline u32 sdram_selfrefresh_enable(void) #warning Assuming EB1 SDRAM controller is *NOT* used #endif -static inline u32 sdram_selfrefresh_enable(void) +static inline void at91sam9_standby(void) { u32 saved_lpr, lpr; saved_lpr = at91_ramc_read(0, AT91_SDRAMC_LPR); lpr = saved_lpr & ~AT91_SDRAMC_LPCB; - at91_ramc_write(0, AT91_SDRAMC_LPR, lpr | AT91_SDRAMC_LPCB_SELF_REFRESH); - return saved_lpr; + at91_ramc_write(0, AT91_SDRAMC_LPR, lpr | + AT91_SDRAMC_LPCB_SELF_REFRESH); + + cpu_do_idle(); + + at91_ramc_write(0, AT91_SDRAMC_LPR, saved_lpr); } -#define sdram_selfrefresh_disable(saved_lpr) at91_ramc_write(0, AT91_SDRAMC_LPR, saved_lpr) -#define wait_for_interrupt_enable() cpu_do_idle() +#define at91_standby at91sam9_standby + +#endif #endif |