diff options
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-omap2/common.h | 1 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/cpuidle44xx.c | 26 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/omap-mpuss-lowpower.c | 3 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/omap4-common.c | 6 |
4 files changed, 31 insertions, 5 deletions
diff --git a/arch/arm/mach-omap2/common.h b/arch/arm/mach-omap2/common.h index e51527835160..3adaa1d5cd10 100644 --- a/arch/arm/mach-omap2/common.h +++ b/arch/arm/mach-omap2/common.h @@ -236,6 +236,7 @@ static inline void __iomem *omap4_get_scu_base(void) extern void __init gic_init_irq(void); extern void gic_dist_disable(void); +extern void gic_dist_enable(void); extern bool gic_dist_disabled(void); extern void gic_timer_retrigger(void); extern void omap_smc1(u32 fn, u32 arg); diff --git a/arch/arm/mach-omap2/cpuidle44xx.c b/arch/arm/mach-omap2/cpuidle44xx.c index 4c8982ae9529..4c158c838d40 100644 --- a/arch/arm/mach-omap2/cpuidle44xx.c +++ b/arch/arm/mach-omap2/cpuidle44xx.c @@ -80,6 +80,7 @@ static int omap_enter_idle_coupled(struct cpuidle_device *dev, int index) { struct idle_statedata *cx = state_ptr + index; + u32 mpuss_can_lose_context = 0; /* * CPU0 has to wait and stay ON until CPU1 is OFF state. @@ -104,6 +105,9 @@ static int omap_enter_idle_coupled(struct cpuidle_device *dev, } } + mpuss_can_lose_context = (cx->mpu_state == PWRDM_POWER_RET) && + (cx->mpu_logic_state == PWRDM_POWER_OFF); + /* * Call idle CPU PM enter notifier chain so that * VFP and per CPU interrupt context is saved. @@ -118,9 +122,8 @@ static int omap_enter_idle_coupled(struct cpuidle_device *dev, * Call idle CPU cluster PM enter notifier chain * to save GIC and wakeupgen context. */ - if ((cx->mpu_state == PWRDM_POWER_RET) && - (cx->mpu_logic_state == PWRDM_POWER_OFF)) - cpu_cluster_pm_enter(); + if (mpuss_can_lose_context) + cpu_cluster_pm_enter(); } omap4_enter_lowpower(dev->cpu, cx->cpu_state); @@ -128,9 +131,23 @@ static int omap_enter_idle_coupled(struct cpuidle_device *dev, /* Wakeup CPU1 only if it is not offlined */ if (dev->cpu == 0 && cpumask_test_cpu(1, cpu_online_mask)) { + + if (IS_PM44XX_ERRATUM(PM_OMAP4_ROM_SMP_BOOT_ERRATUM_GICD) && + mpuss_can_lose_context) + gic_dist_disable(); + clkdm_wakeup(cpu_clkdm[1]); omap_set_pwrdm_state(cpu_pd[1], PWRDM_POWER_ON); clkdm_allow_idle(cpu_clkdm[1]); + + if (IS_PM44XX_ERRATUM(PM_OMAP4_ROM_SMP_BOOT_ERRATUM_GICD) && + mpuss_can_lose_context) { + while (gic_dist_disabled()) { + udelay(1); + cpu_relax(); + } + gic_timer_retrigger(); + } } /* @@ -143,8 +160,7 @@ static int omap_enter_idle_coupled(struct cpuidle_device *dev, * Call idle CPU cluster PM exit notifier chain * to restore GIC and wakeupgen context. */ - if (dev->cpu == 0 && (cx->mpu_state == PWRDM_POWER_RET) && - (cx->mpu_logic_state == PWRDM_POWER_OFF)) + if (dev->cpu == 0 && mpuss_can_lose_context) cpu_cluster_pm_exit(); fail: diff --git a/arch/arm/mach-omap2/omap-mpuss-lowpower.c b/arch/arm/mach-omap2/omap-mpuss-lowpower.c index f991016e2a6a..667915d236f3 100644 --- a/arch/arm/mach-omap2/omap-mpuss-lowpower.c +++ b/arch/arm/mach-omap2/omap-mpuss-lowpower.c @@ -271,6 +271,9 @@ int omap4_enter_lowpower(unsigned int cpu, unsigned int power_state) else omap_pm_ops.finish_suspend(save_state); + if (IS_PM44XX_ERRATUM(PM_OMAP4_ROM_SMP_BOOT_ERRATUM_GICD) && cpu) + gic_dist_enable(); + /* * Restore the CPUx power state to ON otherwise CPUx * power domain can transitions to programmed low power diff --git a/arch/arm/mach-omap2/omap4-common.c b/arch/arm/mach-omap2/omap4-common.c index dd893ec4c8f2..6cd3f3772ecf 100644 --- a/arch/arm/mach-omap2/omap4-common.c +++ b/arch/arm/mach-omap2/omap4-common.c @@ -127,6 +127,12 @@ void gic_dist_disable(void) __raw_writel(0x0, gic_dist_base_addr + GIC_DIST_CTRL); } +void gic_dist_enable(void) +{ + if (gic_dist_base_addr) + __raw_writel(0x1, gic_dist_base_addr + GIC_DIST_CTRL); +} + bool gic_dist_disabled(void) { return !(__raw_readl(gic_dist_base_addr + GIC_DIST_CTRL) & 0x1); |