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rk30: pmu: wait ack when idle request

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黄涛
2013-01-26 11:47:22 +08:00
parent 6e899a19b3
commit 33330b1b19
1 changed files with 12 additions and 0 deletions
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12
arch/arm/mach-rk30/pmu.c
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@@ -40,6 +40,10 @@ void pmu_set_power_domain(enum pmu_power_domain pd, bool on)
unsigned long flags;
spin_lock_irqsave(&pmu_pd_lock, flags);
if (pmu_power_domain_is_on(pd) == on) {
spin_unlock_irqrestore(&pmu_pd_lock, flags);
return;
}
if (!on) {
/* if power down, idle request to NIU first */
if (pd == PD_VIO)
@@ -69,6 +73,8 @@ void pmu_set_idle_request(enum pmu_idle_req req, bool idle)
{
u32 idle_mask = 1 << (26 - req);
u32 idle_target = idle << (26 - req);
u32 ack_mask = 1 << (31 - req);
u32 ack_target = idle << (31 - req);
u32 mask = 1 << (req + 1);
u32 val;
unsigned long flags;
@@ -77,9 +83,13 @@ void pmu_set_idle_request(enum pmu_idle_req req, bool idle)
if (req == IDLE_REQ_CORE) {
idle_mask = 1 << 15;
idle_target = idle << 15;
ack_mask = 1 << 18;
ack_target = idle << 18;
} else if (req == IDLE_REQ_DMA) {
idle_mask = 1 << 14;
idle_target = idle << 14;
ack_mask = 1 << 17;
ack_target = idle << 17;
}
#endif
@@ -92,6 +102,8 @@ void pmu_set_idle_request(enum pmu_idle_req req, bool idle)
writel_relaxed(val, RK30_PMU_BASE + PMU_MISC_CON1);
dsb();
while ((readl_relaxed(RK30_PMU_BASE + PMU_PWRDN_ST) & ack_mask) != ack_target)
;
while ((readl_relaxed(RK30_PMU_BASE + PMU_PWRDN_ST) & idle_mask) != idle_target)
;
spin_unlock_irqrestore(&pmu_misc_con1_lock, flags);