On Tue 01 Sep 01:00 CDT 2020, Bao D. Nguyen wrote: > 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. What exactly are these pairs representing? Is this supposed to be 3 pairs of (min,max) for vcc, vcc and vccq2 to be passed into a regulator_set_voltage() for each regulator? Or are these some sort of "operating points" for the vcc-supply? Regards, Bjorn > - 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 > -- > The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, > a Linux Foundation Collaborative Project >
