mfd: Add support for TWL4030/5030 dynamic power switching

The TWL4030/5030 family of multifunction devices allows board-specific
control of the the various regulators, clock and reset lines through
'scripts' that are loaded into its memory. This allows for Dynamic Power
Switching (DPS).

Implement board-independent core support for DPS that is then used by
board-specific code to load custom DPS scripts.

Signed-off-by: Amit Kucheria <amit.kucheria@verdurent.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/mfd/twl4030-core.c b/drivers/mfd/twl4030-core.c
index 1fd2620819d0..e424cf6d8e9e 100644
--- a/drivers/mfd/twl4030-core.c
+++ b/drivers/mfd/twl4030-core.c
@@ -89,6 +89,12 @@
 #define twl_has_madc()  false
 #endif
 
+#ifdef CONFIG_TWL4030_POWER
+#define twl_has_power()        true
+#else
+#define twl_has_power()        false
+#endif
+
 #if defined(CONFIG_RTC_DRV_TWL4030) || defined(CONFIG_RTC_DRV_TWL4030_MODULE)
 #define twl_has_rtc()   true
 #else
@@ -801,6 +807,10 @@ twl4030_probe(struct i2c_client *client, const struct i2c_device_id *id)
         /* setup clock framework */
         clocks_init(&client->dev);
 
+        /* load power event scripts */
+        if (twl_has_power() && pdata->power)
+                twl4030_power_init(pdata->power);
+
         /* Maybe init the T2 Interrupt subsystem */
         if (client->irq
                         && pdata->irq_base