ufs: add voting support for host controller power

Add the support for voting of the regulator powering the
host controller logic.

Signed-off-by: Raviv Shvili <rshvili@codeaurora.org>
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: Dolev Raviv <draviv@codeaurora.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>

1 files changed, 4 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt b/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt
index b0f791a8b28d..fb1234e0532c 100644
--- a/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt
+++ b/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt
@@ -9,6 +9,7 @@ Required properties:
 - reg               : <registers mapping>
 
 Optional properties:
+- vdd-hba-supply        : phandle to UFS host controller supply regulator node
 - vcc-supply            : phandle to VCC supply regulator node
 - vccq-supply           : phandle to VCCQ supply regulator node
 - vccq2-supply          : phandle to VCCQ2 supply regulator node
@@ -20,6 +21,7 @@ Optional properties:
 - vcc-max-microamp      : specifies max. load that can be drawn from vcc supply
 - vccq-max-microamp     : specifies max. load that can be drawn from vccq supply
 - vccq2-max-microamp    : specifies max. load that can be drawn from vccq2 supply
+- <name>-fixed-regulator : boolean property specifying that <name>-supply is a fixed regulator
 
 - clocks                : List of phandle and clock specifier pairs
 - clock-names           : List of clock input name strings sorted in the same
@@ -39,6 +41,8 @@ Example:
                 reg = <0xfc598000 0x800>;
                 interrupts = <0 28 0>;
 
+                vdd-hba-supply = <&xxx_reg0>;
+                vdd-hba-fixed-regulator;
                 vcc-supply = <&xxx_reg1>;
                 vcc-supply-1p8;
                 vccq-supply = <&xxx_reg2>;