From: Rajendra Nayak <[email protected]> On OMAP5 / DRA7, prevent a CPU powerdomain OFF and resulting MPU OSWR and instead attempt a CPU RET and side effect, MPU RET in suspend.
Signed-off-by: Rajendra Nayak <[email protected]> [[email protected]: update to do save_state only on DRA7] Signed-off-by: Nishanth Menon <[email protected]> --- arch/arm/mach-omap2/omap-mpuss-lowpower.c | 4 ++++ arch/arm/mach-omap2/omap-wakeupgen.c | 2 +- arch/arm/mach-omap2/pm44xx.c | 9 +++++++-- 3 files changed, 12 insertions(+), 3 deletions(-) diff --git a/arch/arm/mach-omap2/omap-mpuss-lowpower.c b/arch/arm/mach-omap2/omap-mpuss-lowpower.c index 207fce2..0d640eb 100644 --- a/arch/arm/mach-omap2/omap-mpuss-lowpower.c +++ b/arch/arm/mach-omap2/omap-mpuss-lowpower.c @@ -242,6 +242,10 @@ int omap4_enter_lowpower(unsigned int cpu, unsigned int power_state) save_state = 1; break; case PWRDM_POWER_RET: + if (soc_is_omap54xx() || soc_is_dra7xx()) { + save_state = 0; + break; + } default: /* * CPUx CSWR is invalid hardware state. Also CPUx OSWR diff --git a/arch/arm/mach-omap2/omap-wakeupgen.c b/arch/arm/mach-omap2/omap-wakeupgen.c index e844e16..87c1c0d 100644 --- a/arch/arm/mach-omap2/omap-wakeupgen.c +++ b/arch/arm/mach-omap2/omap-wakeupgen.c @@ -381,7 +381,7 @@ static struct notifier_block irq_notifier_block = { static void __init irq_pm_init(void) { /* FIXME: Remove this when MPU OSWR support is added */ - if (!soc_is_omap54xx()) + if (!soc_is_omap54xx() && !soc_is_dra7xx()) cpu_pm_register_notifier(&irq_notifier_block); } #else diff --git a/arch/arm/mach-omap2/pm44xx.c b/arch/arm/mach-omap2/pm44xx.c index b6f243d..c063833 100644 --- a/arch/arm/mach-omap2/pm44xx.c +++ b/arch/arm/mach-omap2/pm44xx.c @@ -36,6 +36,8 @@ struct power_state { struct list_head node; }; +static u32 cpu_suspend_state = PWRDM_POWER_OFF; + static LIST_HEAD(pwrst_list); #ifdef CONFIG_SUSPEND @@ -66,7 +68,7 @@ static int omap4_pm_suspend(void) * domain CSWR is not supported by hardware. * More details can be found in OMAP4430 TRM section 4.3.4.2. */ - omap4_enter_lowpower(cpu_id, PWRDM_POWER_OFF); + omap4_enter_lowpower(cpu_id, cpu_suspend_state); /* Restore next powerdomain state */ list_for_each_entry(pwrst, &pwrst_list, node) { @@ -112,8 +114,11 @@ static int __init pwrdms_setup(struct powerdomain *pwrdm, void *unused) * through hotplug path and CPU0 explicitly programmed * further down in the code path */ - if (!strncmp(pwrdm->name, "cpu", 3)) + if (!strncmp(pwrdm->name, "cpu", 3)) { + if (soc_is_omap54xx() || soc_is_dra7xx()) + cpu_suspend_state = PWRDM_POWER_RET; return 0; + } pwrst = kmalloc(sizeof(struct power_state), GFP_ATOMIC); if (!pwrst) -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
