diff options
Diffstat (limited to 'arch/arm/mach-at91/pm.c')
| -rw-r--r-- | arch/arm/mach-at91/pm.c | 70 |
1 files changed, 59 insertions, 11 deletions
diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c index 23726fb31..f06270198 100644 --- a/arch/arm/mach-at91/pm.c +++ b/arch/arm/mach-at91/pm.c @@ -31,10 +31,13 @@ #include <asm/mach/irq.h> #include <asm/fncpy.h> #include <asm/cacheflush.h> +#include <asm/system_misc.h> #include "generic.h" #include "pm.h" +static void __iomem *pmc; + /* * FIXME: this is needed to communicate between the pinctrl driver and * the PM implementation in the machine. Possibly part of the PM @@ -87,7 +90,7 @@ static int at91_pm_verify_clocks(void) unsigned long scsr; int i; - scsr = at91_pmc_read(AT91_PMC_SCSR); + scsr = readl(pmc + AT91_PMC_SCSR); /* USB must not be using PLLB */ if ((scsr & at91_pm_data.uhp_udp_mask) != 0) { @@ -101,8 +104,7 @@ static int at91_pm_verify_clocks(void) if ((scsr & (AT91_PMC_PCK0 << i)) == 0) continue; - - css = at91_pmc_read(AT91_PMC_PCKR(i)) & AT91_PMC_CSS; + css = readl(pmc + AT91_PMC_PCKR(i)) & AT91_PMC_CSS; if (css != AT91_PMC_CSS_SLOW) { pr_err("AT91: PM - Suspend-to-RAM with PCK%d src %d\n", i, css); return 0; @@ -145,8 +147,8 @@ static void at91_pm_suspend(suspend_state_t state) flush_cache_all(); outer_disable(); - at91_suspend_sram_fn(at91_pmc_base, at91_ramc_base[0], - at91_ramc_base[1], pm_data); + at91_suspend_sram_fn(pmc, at91_ramc_base[0], + at91_ramc_base[1], pm_data); outer_resume(); } @@ -353,6 +355,21 @@ static __init void at91_dt_ramc(void) at91_pm_set_standby(standby); } +void at91rm9200_idle(void) +{ + /* + * Disable the processor clock. The processor will be automatically + * re-enabled by an interrupt or by a reset. + */ + writel(AT91_PMC_PCK, pmc + AT91_PMC_SCDR); +} + +void at91sam9_idle(void) +{ + writel(AT91_PMC_PCK, pmc + AT91_PMC_SCDR); + cpu_do_idle(); +} + static void __init at91_pm_sram_init(void) { struct gen_pool *sram_pool; @@ -399,13 +416,36 @@ static void __init at91_pm_sram_init(void) &at91_pm_suspend_in_sram, at91_pm_suspend_in_sram_sz); } -static void __init at91_pm_init(void) +static const struct of_device_id atmel_pmc_ids[] __initconst = { + { .compatible = "atmel,at91rm9200-pmc" }, + { .compatible = "atmel,at91sam9260-pmc" }, + { .compatible = "atmel,at91sam9g45-pmc" }, + { .compatible = "atmel,at91sam9n12-pmc" }, + { .compatible = "atmel,at91sam9x5-pmc" }, + { .compatible = "atmel,sama5d3-pmc" }, + { .compatible = "atmel,sama5d2-pmc" }, + { /* sentinel */ }, +}; + +static void __init at91_pm_init(void (*pm_idle)(void)) { - at91_pm_sram_init(); + struct device_node *pmc_np; if (at91_cpuidle_device.dev.platform_data) platform_device_register(&at91_cpuidle_device); + pmc_np = of_find_matching_node(NULL, atmel_pmc_ids); + pmc = of_iomap(pmc_np, 0); + if (!pmc) { + pr_err("AT91: PM not supported, PMC not found\n"); + return; + } + + if (pm_idle) + arm_pm_idle = pm_idle; + + at91_pm_sram_init(); + if (at91_suspend_sram_fn) suspend_set_ops(&at91_pm_ops); else @@ -424,7 +464,7 @@ void __init at91rm9200_pm_init(void) at91_pm_data.uhp_udp_mask = AT91RM9200_PMC_UHP | AT91RM9200_PMC_UDP; at91_pm_data.memctrl = AT91_MEMCTRL_MC; - at91_pm_init(); + at91_pm_init(at91rm9200_idle); } void __init at91sam9260_pm_init(void) @@ -432,7 +472,7 @@ void __init at91sam9260_pm_init(void) at91_dt_ramc(); at91_pm_data.memctrl = AT91_MEMCTRL_SDRAMC; at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP; - return at91_pm_init(); + at91_pm_init(at91sam9_idle); } void __init at91sam9g45_pm_init(void) @@ -440,7 +480,7 @@ void __init at91sam9g45_pm_init(void) at91_dt_ramc(); at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP; at91_pm_data.memctrl = AT91_MEMCTRL_DDRSDR; - return at91_pm_init(); + at91_pm_init(at91sam9_idle); } void __init at91sam9x5_pm_init(void) @@ -448,5 +488,13 @@ void __init at91sam9x5_pm_init(void) at91_dt_ramc(); at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP; at91_pm_data.memctrl = AT91_MEMCTRL_DDRSDR; - return at91_pm_init(); + at91_pm_init(at91sam9_idle); +} + +void __init sama5_pm_init(void) +{ + at91_dt_ramc(); + at91_pm_data.uhp_udp_mask = AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP; + at91_pm_data.memctrl = AT91_MEMCTRL_DDRSDR; + at91_pm_init(NULL); } |