[PATCH v1 1/2] scsi: dt-bindings: ufs: Add vcc-voltage-level for UFS

[Bao D. Nguyen]

UFS's specifications supports a range of Vcc operating
voltage levels. Add documentation for the UFS's Vcc voltage
levels setting.

Signed-off-by: Can Guo <cang@xxxxxxxxxxxxxx>
Signed-off-by: Asutosh Das <asutoshd@xxxxxxxxxxxxxx>
Signed-off-by: Bao D. Nguyen <nguyenb@xxxxxxxxxxxxxx>
---
 Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt b/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt
index 415ccdd..7257b32 100644
--- a/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt
+++ b/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt
@@ -23,6 +23,8 @@ Optional properties:
                           with "phys" attribute, provides phandle to UFS PHY node
 - vdd-hba-supply        : phandle to UFS host controller supply regulator node
 - vcc-supply            : phandle to VCC supply regulator node
+- vcc-voltage-level     : specifies voltage levels for VCC supply.
+                          Should be specified in pairs (min, max), units uV.
 - vccq-supply           : phandle to VCCQ supply regulator node
 - vccq2-supply          : phandle to VCCQ2 supply regulator node
 - vcc-supply-1p8        : For embedded UFS devices, valid VCC range is 1.7-1.95V
-- 
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