[PATCH 8/8] OMAP3 PM: Support to enable disable OSWR feature from pm debug fs

[Thara Gopinath]

This patch adds enable_oswr flag in pm debug fs to enable
disable OSWR feature.
To enable this feature:
        echo 1 > <path>/debug/pm_debug/enable_oswr
To disable this feature
        echo 0 > <path>/debug/pm_debug/enable_oswr

Signed-off-by: Thara Gopinath <th...@ti.com>
---
 arch/arm/mach-omap2/cpuidle34xx.c |    9 +++++++++
 arch/arm/mach-omap2/pm-debug.c    |    2 ++
 arch/arm/mach-omap2/pm.h          |    1 +
 arch/arm/mach-omap2/pm34xx.c      |    1 +
 4 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-omap2/cpuidle34xx.c 
b/arch/arm/mach-omap2/cpuidle34xx.c
index 419f683..91ef0df 100644
--- a/arch/arm/mach-omap2/cpuidle34xx.c
+++ b/arch/arm/mach-omap2/cpuidle34xx.c
@@ -155,11 +155,20 @@ static int omap3_enter_idle(struct cpuidle_device *dev,
         * bits in case the powerdomain enters retention
         */
        if (mpu_state <= PWRDM_POWER_RET) {
+               if (!enable_oswr) {
+                       mpu_logicl1_ret_state = PWRDM_POWER_RET;
+                       mpu_l2cache_ret_state = PWRDM_POWER_RET;
+               }
                pwrdm_set_logic_retst(mpu_pd, mpu_logicl1_ret_state);
                pwrdm_set_mem_retst(mpu_pd, 0, mpu_l2cache_ret_state);
        }
 
        if (core_state <= PWRDM_POWER_RET) {
+               if (!enable_oswr) {
+                       core_logic_state = PWRDM_POWER_RET;
+                       core_mem1_ret_state = PWRDM_POWER_RET;
+                       core_mem2_ret_state = PWRDM_POWER_RET;
+               }
                pwrdm_set_logic_retst(core_pd, core_logic_state);
                pwrdm_set_mem_retst(core_pd, 0, core_mem1_ret_state);
                pwrdm_set_mem_retst(core_pd, 1, core_mem2_ret_state);
diff --git a/arch/arm/mach-omap2/pm-debug.c b/arch/arm/mach-omap2/pm-debug.c
index 035cfa7..cdb081b 100644
--- a/arch/arm/mach-omap2/pm-debug.c
+++ b/arch/arm/mach-omap2/pm-debug.c
@@ -601,6 +601,8 @@ static int __init pm_dbg_init(void)
                                   &enable_off_mode, &pm_dbg_option_fops);
        (void) debugfs_create_file("sleep_while_idle", S_IRUGO | S_IWUGO, d,
                                   &sleep_while_idle, &pm_dbg_option_fops);
+       (void) debugfs_create_file("enable_oswr", S_IRUGO | S_IWUGO, d,
+                                  &enable_oswr, &pm_dbg_option_fops);
        (void) debugfs_create_file("wakeup_timer_seconds", S_IRUGO | S_IWUGO, d,
                                   &wakeup_timer_seconds, &pm_dbg_option_fops);
 
diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h
index 75aa685..03c49a8 100644
--- a/arch/arm/mach-omap2/pm.h
+++ b/arch/arm/mach-omap2/pm.h
@@ -15,6 +15,7 @@
 
 extern u32 enable_off_mode;
 extern u32 sleep_while_idle;
+extern u32 enable_oswr;
 extern u32 voltage_off_while_idle;
 
 extern void *omap3_secure_ram_storage;
diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
index bfdcac2..53c08a5 100644
--- a/arch/arm/mach-omap2/pm34xx.c
+++ b/arch/arm/mach-omap2/pm34xx.c
@@ -73,6 +73,7 @@ static inline bool is_suspending(void)
 
 u32 enable_off_mode;
 u32 sleep_while_idle;
+u32 enable_oswr;
 u32 wakeup_timer_seconds;
 u32 voltage_off_while_idle;
 
-- 
1.5.6.3

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