mfd: db8500 OPP and sleep handling update

This updates the operating point handling code by:

- Supporting the DDR OPP retention state.
- Supporting another low operating point named
  APE_50_PARTLY_25_OPP
- Adding an interface to figure out if the sleep state change
  was properly achieved.

Signed-off-by: Shreshtha Kumar Sahu <shreshthakumar.sahu@stericsson.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Mattias Nilsson <mattias.i.nilsson@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/include/linux/mfd/db8500-prcmu.h b/include/linux/mfd/db8500-prcmu.h
index c5028f1246fc..841342c55451 100644
--- a/include/linux/mfd/db8500-prcmu.h
+++ b/include/linux/mfd/db8500-prcmu.h
@@ -457,6 +457,25 @@ enum hw_acc_dev {
         NUM_HW_ACC
 };
 
+/**
+ * enum prcmu_power_status - results from set_power_state
+ * @PRCMU_SLEEP_OK: Sleep went ok
+ * @PRCMU_DEEP_SLEEP_OK: DeepSleep went ok
+ * @PRCMU_IDLE_OK: Idle went ok
+ * @PRCMU_DEEPIDLE_OK: DeepIdle went ok
+ * @PRCMU_PRCMU2ARMPENDINGIT_ER: Pending interrupt detected
+ * @PRCMU_ARMPENDINGIT_ER: Pending interrupt detected
+ *
+ */
+enum prcmu_power_status {
+        PRCMU_SLEEP_OK                  = 0xf3,
+        PRCMU_DEEP_SLEEP_OK             = 0xf6,
+        PRCMU_IDLE_OK                   = 0xf0,
+        PRCMU_DEEPIDLE_OK               = 0xe3,
+        PRCMU_PRCMU2ARMPENDINGIT_ER     = 0x91,
+        PRCMU_ARMPENDINGIT_ER           = 0x93,
+};
+
 /*
  * Definitions for autonomous power management configuration.
  */
@@ -544,6 +563,7 @@ int db8500_prcmu_load_a9wdog(u8 id, u32 val);
 
 void db8500_prcmu_system_reset(u16 reset_code);
 int db8500_prcmu_set_power_state(u8 state, bool keep_ulp_clk, bool keep_ap_pll);
+u8 db8500_prcmu_get_power_state_result(void);
 void db8500_prcmu_enable_wakeups(u32 wakeups);
 int db8500_prcmu_set_epod(u16 epod_id, u8 epod_state);
 int db8500_prcmu_request_clock(u8 clock, bool enable);
@@ -699,6 +719,11 @@ static inline int db8500_prcmu_set_power_state(u8 state, bool keep_ulp_clk,
         return 0;
 }
 
+static inline u8 db8500_prcmu_get_power_state_result(void)
+{
+        return 0;
+}
+
 static inline void db8500_prcmu_enable_wakeups(u32 wakeups) {}
 
 static inline int db8500_prcmu_set_epod(u16 epod_id, u8 epod_state)