diff options
Diffstat (limited to 'Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt b/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt index 2df00524bd21..8cf59452c675 100644 --- a/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt +++ b/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt @@ -33,6 +33,12 @@ Optional properties: - clocks : List of phandle and clock specifier pairs - clock-names : List of clock input name strings sorted in the same order as the clocks property. + "ref_clk" indicates reference clock frequency. + UFS host supplies reference clock to UFS device and UFS device + specification allows host to provide one of the 4 frequencies (19.2 MHz, + 26 MHz, 38.4 MHz, 52MHz) for reference clock. This "ref_clk" entry is + parsed and used to update the reference clock setting in device. + Defaults to 26 MHz(as per specification) if not specified by host. - freq-table-hz : Array of <min max> operating frequencies stored in the same order as the clocks property. If this property is not defined or a value in the array is "0" then it is assumed |