mfd: Palmas: Add TPS659038 PMIC support

The Patch adds TPS659038 PMIC support in the palmas mfd driver.
The TPS659038 has almost the same registers as of the earlier
supported variants of PALMAS family such as the TWL6035.

The critical differences between TPS659038 and TWL6035 being:

1) TPS659038 has nothing related to battery charging and back up battery stuff.
2) TPS659038 does not have does not have SMPS10(Boost) step up convertor.
3) TPS659038 does not have Battery detection and anything related to battery.
4) TPS659038 has something more than Palmas in one case it is called
   Sync clock Functionality.
5) can use an external crystal unit or 16MHz oscillator to generate clock.
6) SD card detection, Battery presence detection, Vibrator, USB OTG are missing
   when compared to TWL6035.

Hence some of the IRQs are reserved in case of TPS659038 but the
remaining are bit exact compared to TWL6035.

Signed-off-by: J Keerthy <j-keerthy@ti.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/mfd/palmas.txt b/Documentation/devicetree/bindings/mfd/palmas.txt
index d5ab9e69e7e..3defba700ee 100644
--- a/Documentation/devicetree/bindings/mfd/palmas.txt
+++ b/Documentation/devicetree/bindings/mfd/palmas.txt
@@ -16,6 +16,7 @@ Required properties:
   ti,tps65913
   ti,tps65914
   ti,tps80036
+  ti,tps659038
 and also the generic series names
   ti,palmas
   ti,palmas-charger