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, 13 insertions, 0 deletions

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 4fd4f913c36b..570be139f9df 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -108,6 +108,19 @@ config TWL4030_CORE
           high speed USB OTG transceiver, an audio codec (on most
           versions) and many other features.
 
+config TWL4030_POWER
+        bool "Support power resources on TWL4030 family chips"
+        depends on TWL4030_CORE && ARM
+        help
+          Say yes here if you want to use the power resources on the
+          TWL4030 family chips.  Most of these resources are regulators,
+          which have a separate driver; some are control signals, such
+          as clock request handshaking.
+
+          This driver uses board-specific data to initialize the resources
+          and load scripts controling which resources are switched off/on
+          or reset when a sleep, wakeup or warm reset event occurs.
+
 config MFD_TMIO
         bool
         default n