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-rw-r--r--arch/arm/mach-omap2/omap-mpuss-lowpower.c62
1 files changed, 51 insertions, 11 deletions
diff --git a/arch/arm/mach-omap2/omap-mpuss-lowpower.c b/arch/arm/mach-omap2/omap-mpuss-lowpower.c
index d650f91f15de..8e7029269d8a 100644
--- a/arch/arm/mach-omap2/omap-mpuss-lowpower.c
+++ b/arch/arm/mach-omap2/omap-mpuss-lowpower.c
@@ -71,10 +71,43 @@ struct omap4_cpu_pm_info {
void (*secondary_startup)(void);
};
+/**
+ * struct cpu_pm_ops - CPU pm operations
+ * @finish_suspend: CPU suspend finisher function pointer
+ * @resume: CPU resume function pointer
+ * @scu_prepare: CPU Snoop Control program function pointer
+ *
+ * Structure holds functions pointer for CPU low power operations like
+ * suspend, resume and scu programming.
+ */
+struct cpu_pm_ops {
+ int (*finish_suspend)(unsigned long cpu_state);
+ void (*resume)(void);
+ void (*scu_prepare)(unsigned int cpu_id, unsigned int cpu_state);
+};
+
static DEFINE_PER_CPU(struct omap4_cpu_pm_info, omap4_pm_info);
static struct powerdomain *mpuss_pd;
static void __iomem *sar_base;
+static int default_finish_suspend(unsigned long cpu_state)
+{
+ omap_do_wfi();
+ return 0;
+}
+
+static void dummy_cpu_resume(void)
+{}
+
+static void dummy_scu_prepare(unsigned int cpu_id, unsigned int cpu_state)
+{}
+
+struct cpu_pm_ops omap_pm_ops = {
+ .finish_suspend = default_finish_suspend,
+ .resume = dummy_cpu_resume,
+ .scu_prepare = dummy_scu_prepare,
+};
+
/*
* Program the wakeup routine address for the CPU0 and CPU1
* used for OFF or DORMANT wakeup.
@@ -172,11 +205,12 @@ static void save_l2x0_context(void)
{
u32 val;
void __iomem *l2x0_base = omap4_get_l2cache_base();
-
- val = __raw_readl(l2x0_base + L2X0_AUX_CTRL);
- __raw_writel(val, sar_base + L2X0_AUXCTRL_OFFSET);
- val = __raw_readl(l2x0_base + L2X0_PREFETCH_CTRL);
- __raw_writel(val, sar_base + L2X0_PREFETCH_CTRL_OFFSET);
+ if (l2x0_base) {
+ val = __raw_readl(l2x0_base + L2X0_AUX_CTRL);
+ __raw_writel(val, sar_base + L2X0_AUXCTRL_OFFSET);
+ val = __raw_readl(l2x0_base + L2X0_PREFETCH_CTRL);
+ __raw_writel(val, sar_base + L2X0_PREFETCH_CTRL_OFFSET);
+ }
}
#else
static void save_l2x0_context(void)
@@ -239,17 +273,17 @@ int omap4_enter_lowpower(unsigned int cpu, unsigned int power_state)
cpu_clear_prev_logic_pwrst(cpu);
pwrdm_set_next_pwrst(pm_info->pwrdm, power_state);
- set_cpu_wakeup_addr(cpu, virt_to_phys(omap4_cpu_resume));
- scu_pwrst_prepare(cpu, power_state);
+ set_cpu_wakeup_addr(cpu, virt_to_phys(omap_pm_ops.resume));
+ omap_pm_ops.scu_prepare(cpu, power_state);
l2x0_pwrst_prepare(cpu, save_state);
/*
* Call low level function with targeted low power state.
*/
if (save_state)
- cpu_suspend(save_state, omap4_finish_suspend);
+ cpu_suspend(save_state, omap_pm_ops.finish_suspend);
else
- omap4_finish_suspend(save_state);
+ omap_pm_ops.finish_suspend(save_state);
/*
* Restore the CPUx power state to ON otherwise CPUx
@@ -285,14 +319,14 @@ int __cpuinit omap4_hotplug_cpu(unsigned int cpu, unsigned int power_state)
pwrdm_clear_all_prev_pwrst(pm_info->pwrdm);
pwrdm_set_next_pwrst(pm_info->pwrdm, power_state);
set_cpu_wakeup_addr(cpu, virt_to_phys(pm_info->secondary_startup));
- scu_pwrst_prepare(cpu, power_state);
+ omap_pm_ops.scu_prepare(cpu, power_state);
/*
* CPU never retuns back if targeted power state is OFF mode.
* CPU ONLINE follows normal CPU ONLINE ptah via
* omap_secondary_startup().
*/
- omap4_finish_suspend(cpu_state);
+ omap_pm_ops.finish_suspend(cpu_state);
pwrdm_set_next_pwrst(pm_info->pwrdm, PWRDM_POWER_ON);
return 0;
@@ -369,6 +403,12 @@ int __init omap4_mpuss_init(void)
save_l2x0_context();
+ if (cpu_is_omap44xx()) {
+ omap_pm_ops.finish_suspend = omap4_finish_suspend;
+ omap_pm_ops.resume = omap4_cpu_resume;
+ omap_pm_ops.scu_prepare = scu_pwrst_prepare;
+ }
+
return 0;
}