[PATCH 16/17] omap4: cpuidle: Allow debugfs control through enable_off_mode

[Santosh Shilimkar <santosh.shilimkar@xxxxxx>]

Only MPU OFF and RET is controllable. CORE state is blocked
at ON state till the CORE RET support is added.

Signed-off-by: Santosh Shilimkar <santosh.shilimkar@xxxxxx>
Reviewed-by: Kevin Hilman <khilman@xxxxxx>
---
 arch/arm/mach-omap2/cpuidle44xx.c |   30 ++++++++++++++++++++++++++++++
 arch/arm/mach-omap2/pm.h          |    1 +
 arch/arm/mach-omap2/pm44xx.c      |    4 ++++
 3 files changed, 35 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-omap2/cpuidle44xx.c b/arch/arm/mach-omap2/cpuidle44xx.c
index e887eb5..4207862 100644
--- a/arch/arm/mach-omap2/cpuidle44xx.c
+++ b/arch/arm/mach-omap2/cpuidle44xx.c
@@ -170,6 +170,31 @@ static int omap4_enter_idle_bm(struct cpuidle_device *dev,
 }
 
 /**
+ * omap4_cpuidle_update_states() - Update the cpuidle states
+ * @mpu_deepest_state: Enable states upto and including this for mpu domain
+ * @core_deepest_state: Enable states upto and including this for core domain
+ *
+ * This goes through the list of states available and enables and disables the
+ * validity of C states based on deepest state that can be achieved for the
+ * variable domain
+ */
+void omap4_cpuidle_update_states(u32 mpu_deepest_state, u32 core_deepest_state)
+{
+	int i;
+
+	for (i = OMAP4_STATE_C1; i < OMAP4_MAX_STATES; i++) {
+		struct omap4_processor_cx *cx = &omap4_power_states[i];
+
+		if ((cx->mpu_state >= mpu_deepest_state) &&
+		    (cx->core_state >= core_deepest_state)) {
+			cx->valid = 1;
+		} else {
+			cx->valid = 0;
+		}
+	}
+}
+
+/**
  * omap4_init_power_states - Initialises the OMAP4 specific C states.
  *
  */
@@ -325,6 +350,11 @@ int __init omap4_idle_init(void)
 		}
 	}
 
+	if (enable_off_mode)
+		omap4_cpuidle_update_states(PWRDM_POWER_OFF, PWRDM_POWER_OFF);
+	else
+		omap4_cpuidle_update_states(PWRDM_POWER_RET, PWRDM_POWER_RET);
+
 	return 0;
 }
 #else
diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h
index ce848b0..4df89d1 100644
--- a/arch/arm/mach-omap2/pm.h
+++ b/arch/arm/mach-omap2/pm.h
@@ -77,6 +77,7 @@ extern u32 sleep_while_idle;
 
 #if defined(CONFIG_CPU_IDLE)
 extern void omap3_cpuidle_update_states(u32, u32);
+extern void omap4_cpuidle_update_states(u32, u32);
 #endif
 
 #if defined(CONFIG_PM_DEBUG) && defined(CONFIG_DEBUG_FS)
diff --git a/arch/arm/mach-omap2/pm44xx.c b/arch/arm/mach-omap2/pm44xx.c
index 628242d..6244ab2 100644
--- a/arch/arm/mach-omap2/pm44xx.c
+++ b/arch/arm/mach-omap2/pm44xx.c
@@ -183,6 +183,10 @@ void omap4_pm_off_mode_enable(int enable)
 	else
 		state = PWRDM_POWER_RET;
 
+#ifdef CONFIG_CPU_IDLE
+	omap4_cpuidle_update_states(state, PWRDM_POWER_ON);
+#endif
+
 	list_for_each_entry(pwrst, &pwrst_list, node) {
 		/* FIXME: Remove this check when core retention is supported */
 		if (!strcmp(pwrst->pwrdm->name, "mpu_pwrdm")) {
-- 
1.6.0.4

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