ARM: tegra: Make LP2 require CONFIG_PM_SLEEP

Change-Id: Iaaf96375eaf7408f5bedc4196d33a04fb94129ef
Signed-off-by: Scott Williams <scwilliams@nvidia.com>
DW: Split into logical changes
Signed-off-by: Dan Willemsen <dwillemsen@nvidia.com>

Rebase-Id: R98567e0d894acbdac770b191f7e46f16592d5d0b

4 files changed, 33 insertions, 14 deletions

diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile
index 7aa8ef40f45b..739c5d1fcb86 100644
--- a/arch/arm/mach-tegra/Makefile
+++ b/arch/arm/mach-tegra/Makefile
@@ -59,8 +59,10 @@ obj-$(CONFIG_TEGRA_PCI)			+= pcie.o
 obj-$(CONFIG_USB_SUPPORT)		+= usb_phy.o
 ifeq ($(CONFIG_CPU_IDLE),y)
 obj-y                                   += cpuidle.o
+ifeq ($(CONFIG_PM_SLEEP),y)
 obj-$(CONFIG_ARCH_TEGRA_2x_SOC)         += cpuidle-t2.o
 endif
+endif
 obj-$(CONFIG_TEGRA_IOVMM)               += iovmm.o
 obj-$(CONFIG_TEGRA_IOVMM_GART)          += iovmm-gart.o
 obj-$(CONFIG_TEGRA_IOVMM_SMMU)          += iovmm-smmu.o
diff --git a/arch/arm/mach-tegra/cpuidle.c b/arch/arm/mach-tegra/cpuidle.c
index 6f70bf3e014b..d1061fb850ef 100644
--- a/arch/arm/mach-tegra/cpuidle.c
+++ b/arch/arm/mach-tegra/cpuidle.c
@@ -44,11 +44,13 @@
 #include "pm.h"
 #include "sleep.h"
 
+#ifdef CONFIG_PM_SLEEP
 static bool lp2_in_idle __read_mostly = true;
 module_param(lp2_in_idle, bool, 0644);
 static bool lp2_disabled_by_suspend;
 
 static unsigned int tegra_lp2_min_residency;
+#endif
 
 struct cpuidle_driver tegra_idle = {
 	.name = "tegra_idle",
@@ -57,11 +59,6 @@ struct cpuidle_driver tegra_idle = {
 
 static DEFINE_PER_CPU(struct cpuidle_device *, idle_devices);
 
-void tegra_lp2_in_idle(bool enable)
-{
-	lp2_in_idle = enable;
-}
-
 static inline unsigned int time_to_bin(unsigned int time)
 {
 	return fls(time);
@@ -88,6 +85,14 @@ static int tegra_idle_enter_lp3(struct cpuidle_device *dev,
 	return (int)us;
 }
 
+void tegra_lp2_in_idle(bool enable)
+{
+#ifdef CONFIG_PM_SLEEP
+	lp2_in_idle = enable;
+#endif
+}
+
+#ifdef CONFIG_PM_SLEEP
 static int tegra_idle_enter_lp2(struct cpuidle_device *dev,
 	struct cpuidle_state *state)
 {
@@ -122,13 +127,16 @@ static int tegra_idle_enter_lp2(struct cpuidle_device *dev,
 
 	return (int)us;
 }
+#endif
 
 static int tegra_idle_prepare(struct cpuidle_device *dev)
 {
+#ifdef CONFIG_PM_SLEEP
 	if (lp2_in_idle)
 		dev->states[1].flags &= ~CPUIDLE_FLAG_IGNORE;
 	else
 		dev->states[1].flags |= CPUIDLE_FLAG_IGNORE;
+#endif
 
 	return 0;
 }
@@ -156,6 +164,7 @@ static int tegra_cpuidle_register_device(unsigned int cpu)
 	dev->safe_state = state;
 	dev->state_count++;
 
+#ifdef CONFIG_PM_SLEEP
 	state = &dev->states[1];
 	snprintf(state->name, CPUIDLE_NAME_LEN, "LP2");
 	snprintf(state->desc, CPUIDLE_DESC_LEN, "CPU power-gate");
@@ -172,6 +181,8 @@ static int tegra_cpuidle_register_device(unsigned int cpu)
 	dev->power_specified = 1;
 	dev->safe_state = state;
 	dev->state_count++;
+#endif
+
 	dev->prepare = tegra_idle_prepare;
 
 	if (cpuidle_register_device(dev)) {
@@ -186,10 +197,12 @@ static int tegra_cpuidle_register_device(unsigned int cpu)
 static int tegra_cpuidle_pm_notify(struct notifier_block *nb,
 	unsigned long event, void *dummy)
 {
+#ifdef CONFIG_PM_SLEEP
 	if (event == PM_SUSPEND_PREPARE)
 		lp2_disabled_by_suspend = true;
 	else if (event == PM_POST_SUSPEND)
 		lp2_disabled_by_suspend = false;
+#endif
 
 	return NOTIFY_OK;
 }
@@ -207,8 +220,10 @@ static int __init tegra_cpuidle_init(void)
 	if (ret)
 		return ret;
 
+#ifdef CONFIG_PM_SLEEP
 	/* !!!FIXME!!! Add tegra_lp2_power_off_time */
 	tegra_lp2_min_residency = tegra_cpu_lp2_min_residency();
+#endif
 
 	for_each_possible_cpu(cpu) {
 		if (tegra_cpuidle_register_device(cpu))
@@ -228,7 +243,7 @@ static void __exit tegra_cpuidle_exit(void)
 module_init(tegra_cpuidle_init);
 module_exit(tegra_cpuidle_exit);
 
-#ifdef CONFIG_DEBUG_FS
+#if defined(CONFIG_DEBUG_FS) && defined(CONFIG_PM_SLEEP)
 static int tegra_lp2_debug_open(struct inode *inode, struct file *file)
 {
 	return single_open(file, tegra_lp2_debug_show, inode->i_private);
diff --git a/arch/arm/mach-tegra/cpuidle.h b/arch/arm/mach-tegra/cpuidle.h
index f3f80ad05ba0..c0fbb45a0f38 100644
--- a/arch/arm/mach-tegra/cpuidle.h
+++ b/arch/arm/mach-tegra/cpuidle.h
@@ -21,6 +21,8 @@
 
 #include <linux/cpuidle.h>
 
+#ifdef CONFIG_PM_SLEEP
+
 #ifdef CONFIG_ARCH_TEGRA_2x_SOC
 void tegra2_idle_lp2(struct cpuidle_device *dev, struct cpuidle_state *state);
 void tegra2_cpu_idle_stats_lp2_ready(unsigned int cpu);
@@ -66,5 +68,6 @@ void tegra_lp2_in_idle(bool enable);
 #else
 static inline void tegra_lp2_in_idle(bool enable) {}
 #endif
+#endif /* CONFIG_PM_SLEEP */
 
 #endif
diff --git a/arch/arm/mach-tegra/pm.c b/arch/arm/mach-tegra/pm.c
index 0355a14a0e40..29911e70b557 100644
--- a/arch/arm/mach-tegra/pm.c
+++ b/arch/arm/mach-tegra/pm.c
@@ -862,19 +862,18 @@ void __init tegra_init_suspend(struct tegra_suspend_platform_data *plat)
 			pr_err("%s: sysfs_create_file suspend type failed!\n",
 								__func__);
 	}
-#else
-	if ((plat->suspend_mode == TEGRA_SUSPEND_LP0) ||
-	    (plat->suspend_mode == TEGRA_SUSPEND_LP1)) {
-		pr_warning("%s: Suspend mode LP0 or LP1 requires "
-			   "CONFIG_PM_SLEEP -- limiting to LP2\n", __func__);
-		plat->suspend_mode = TEGRA_SUSPEND_LP2;
-	}
-#endif
 
 #ifdef CONFIG_CPU_IDLE
 	if (plat->suspend_mode == TEGRA_SUSPEND_NONE)
 		tegra_lp2_in_idle(false);
 #endif
+#else
+	if (plat->suspend_mode != TEGRA_SUSPEND_NONE) {
+		pr_warning("%s: Suspend requires CONFIG_PM_SLEEP -- "
+			   "disabling suspend\n", __func__);
+		plat->suspend_mode = TEGRA_SUSPEND_NONE;
+	}
+#endif
 
 	current_suspend_mode = plat->suspend_mode;
 }