From 0337c3e0c3cbbb3a4f411c292f52fcc314abae67 Mon Sep 17 00:00:00 2001 From: Joseph Lo Date: Wed, 3 Apr 2013 19:31:28 +0800 Subject: ARM: tegra: moving the CPU power timer function to PMC driver The CPU power timer set up function was related to PMC register. Now moving it to PMC driver. And it also help to clean up the PM related code later. The timer was calculated based on the input clock of PMC. In this patch, we also get the clock from DT. Signed-off-by: Joseph Lo Signed-off-by: Stephen Warren --- arch/arm/mach-tegra/pm.c | 37 +------------------------------------ 1 file changed, 1 insertion(+), 36 deletions(-) (limited to 'arch/arm/mach-tegra/pm.c') diff --git a/arch/arm/mach-tegra/pm.c b/arch/arm/mach-tegra/pm.c index 0494f739c95f..5f5611f40b43 100644 --- a/arch/arm/mach-tegra/pm.c +++ b/arch/arm/mach-tegra/pm.c @@ -22,7 +22,6 @@ #include #include #include -#include #include #include @@ -37,52 +36,18 @@ #include "reset.h" #include "flowctrl.h" #include "fuse.h" +#include "pmc.h" #include "sleep.h" #define TEGRA_POWER_CPU_PWRREQ_OE (1 << 16) /* CPU pwr req enable */ #define PMC_CTRL 0x0 -#define PMC_CPUPWRGOOD_TIMER 0xc8 -#define PMC_CPUPWROFF_TIMER 0xcc #ifdef CONFIG_PM_SLEEP static DEFINE_SPINLOCK(tegra_lp2_lock); static void __iomem *pmc = IO_ADDRESS(TEGRA_PMC_BASE); -static struct clk *tegra_pclk; void (*tegra_tear_down_cpu)(void); -static void set_power_timers(unsigned long us_on, unsigned long us_off) -{ - unsigned long long ticks; - unsigned long long pclk; - unsigned long rate; - static unsigned long tegra_last_pclk; - - if (tegra_pclk == NULL) { - tegra_pclk = clk_get_sys(NULL, "pclk"); - WARN_ON(IS_ERR(tegra_pclk)); - } - - rate = clk_get_rate(tegra_pclk); - - if (WARN_ON_ONCE(rate <= 0)) - pclk = 100000000; - else - pclk = rate; - - if ((rate != tegra_last_pclk)) { - ticks = (us_on * pclk) + 999999ull; - do_div(ticks, 1000000); - writel((unsigned long)ticks, pmc + PMC_CPUPWRGOOD_TIMER); - - ticks = (us_off * pclk) + 999999ull; - do_div(ticks, 1000000); - writel((unsigned long)ticks, pmc + PMC_CPUPWROFF_TIMER); - wmb(); - } - tegra_last_pclk = pclk; -} - /* * restore_cpu_complex * -- cgit From c8c2e6069065fdecfb195a2c438c7faa964aef22 Mon Sep 17 00:00:00 2001 From: Joseph Lo Date: Wed, 3 Apr 2013 19:31:47 +0800 Subject: ARM: tegra: pm: add platform suspend support Adding suspend to RAM support for Tegra platform. There are three suspend mode for Tegra. The difference were below. * LP2: CPU voltage off * LP1: CPU voltage off, DRAM in self-refresh * LP0: CPU + Core voltage off, DRAM in self-refresh After this patch, the LP2 suspend mode will be supported. Signed-off-by: Joseph Lo Signed-off-by: Stephen Warren --- arch/arm/mach-tegra/pm.c | 93 +++++++++++++++++++++++++++++++++++++++++------- 1 file changed, 80 insertions(+), 13 deletions(-) (limited to 'arch/arm/mach-tegra/pm.c') diff --git a/arch/arm/mach-tegra/pm.c b/arch/arm/mach-tegra/pm.c index 5f5611f40b43..3a3318a83ad3 100644 --- a/arch/arm/mach-tegra/pm.c +++ b/arch/arm/mach-tegra/pm.c @@ -22,6 +22,7 @@ #include #include #include +#include #include #include @@ -38,14 +39,10 @@ #include "fuse.h" #include "pmc.h" #include "sleep.h" - -#define TEGRA_POWER_CPU_PWRREQ_OE (1 << 16) /* CPU pwr req enable */ - -#define PMC_CTRL 0x0 +#include "pmc.h" #ifdef CONFIG_PM_SLEEP static DEFINE_SPINLOCK(tegra_lp2_lock); -static void __iomem *pmc = IO_ADDRESS(TEGRA_PMC_BASE); void (*tegra_tear_down_cpu)(void); /* @@ -145,14 +142,7 @@ static int tegra_sleep_cpu(unsigned long v2p) void tegra_idle_lp2_last(u32 cpu_on_time, u32 cpu_off_time) { - u32 mode; - - /* Only the last cpu down does the final suspend steps */ - mode = readl(pmc + PMC_CTRL); - mode |= TEGRA_POWER_CPU_PWRREQ_OE; - writel(mode, pmc + PMC_CTRL); - - set_power_timers(cpu_on_time, cpu_off_time); + tegra_pmc_pm_set(TEGRA_SUSPEND_LP2); cpu_cluster_pm_enter(); suspend_cpu_complex(); @@ -162,4 +152,81 @@ void tegra_idle_lp2_last(u32 cpu_on_time, u32 cpu_off_time) restore_cpu_complex(); cpu_cluster_pm_exit(); } + +enum tegra_suspend_mode tegra_pm_validate_suspend_mode( + enum tegra_suspend_mode mode) +{ + /* Tegra114 didn't support any suspending mode yet. */ + if (tegra_chip_id == TEGRA114) + return TEGRA_SUSPEND_NONE; + + /* + * The Tegra devices only support suspending to LP2 currently. + */ + if (mode > TEGRA_SUSPEND_LP2) + return TEGRA_SUSPEND_LP2; + + return mode; +} + +static const char *lp_state[TEGRA_MAX_SUSPEND_MODE] = { + [TEGRA_SUSPEND_NONE] = "none", + [TEGRA_SUSPEND_LP2] = "LP2", + [TEGRA_SUSPEND_LP1] = "LP1", + [TEGRA_SUSPEND_LP0] = "LP0", +}; + +static int __cpuinit tegra_suspend_enter(suspend_state_t state) +{ + enum tegra_suspend_mode mode = tegra_pmc_get_suspend_mode(); + + if (WARN_ON(mode < TEGRA_SUSPEND_NONE || + mode >= TEGRA_MAX_SUSPEND_MODE)) + return -EINVAL; + + pr_info("Entering suspend state %s\n", lp_state[mode]); + + tegra_pmc_pm_set(mode); + + local_fiq_disable(); + + suspend_cpu_complex(); + switch (mode) { + case TEGRA_SUSPEND_LP2: + tegra_set_cpu_in_lp2(0); + break; + default: + break; + } + + cpu_suspend(PHYS_OFFSET - PAGE_OFFSET, &tegra_sleep_cpu); + + switch (mode) { + case TEGRA_SUSPEND_LP2: + tegra_clear_cpu_in_lp2(0); + break; + default: + break; + } + restore_cpu_complex(); + + local_fiq_enable(); + + return 0; +} + +static const struct platform_suspend_ops tegra_suspend_ops = { + .valid = suspend_valid_only_mem, + .enter = tegra_suspend_enter, +}; + +void __init tegra_init_suspend(void) +{ + if (tegra_pmc_get_suspend_mode() == TEGRA_SUSPEND_NONE) + return; + + tegra_pmc_suspend_init(); + + suspend_set_ops(&tegra_suspend_ops); +} #endif -- cgit From 4d82d0587b4a964ea3a7c73aa044b433000527dd Mon Sep 17 00:00:00 2001 From: Joseph Lo Date: Tue, 2 Apr 2013 01:20:50 +0000 Subject: ARM: tegra: cpuidle: remove redundant parameters for powered-down mode After the patch series for system suspending support, tegra_idle_lp2_last() no longer uses its parameters cpu_on_time or cpu_off_time, so remove them. Signed-off-by: Joseph Lo Signed-off-by: Stephen Warren --- arch/arm/mach-tegra/pm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/arm/mach-tegra/pm.c') diff --git a/arch/arm/mach-tegra/pm.c b/arch/arm/mach-tegra/pm.c index 3a3318a83ad3..84d8742bdb1e 100644 --- a/arch/arm/mach-tegra/pm.c +++ b/arch/arm/mach-tegra/pm.c @@ -140,7 +140,7 @@ static int tegra_sleep_cpu(unsigned long v2p) return 0; } -void tegra_idle_lp2_last(u32 cpu_on_time, u32 cpu_off_time) +void tegra_idle_lp2_last(void) { tegra_pmc_pm_set(TEGRA_SUSPEND_LP2); -- cgit From 38be85de698ef3f2755ee0eabf520530757860aa Mon Sep 17 00:00:00 2001 From: Wei Yongjun Date: Fri, 5 Apr 2013 14:58:52 +0800 Subject: ARM: tegra: pm: remove duplicated include from pm.c Remove duplicated include. Signed-off-by: Wei Yongjun Signed-off-by: Stephen Warren --- arch/arm/mach-tegra/pm.c | 1 - 1 file changed, 1 deletion(-) (limited to 'arch/arm/mach-tegra/pm.c') diff --git a/arch/arm/mach-tegra/pm.c b/arch/arm/mach-tegra/pm.c index 84d8742bdb1e..d0b7400e4606 100644 --- a/arch/arm/mach-tegra/pm.c +++ b/arch/arm/mach-tegra/pm.c @@ -39,7 +39,6 @@ #include "fuse.h" #include "pmc.h" #include "sleep.h" -#include "pmc.h" #ifdef CONFIG_PM_SLEEP static DEFINE_SPINLOCK(tegra_lp2_lock); -- cgit