Merge tag 'docs-5.0-fixes' of git://git.lwn.net/linux

[sfrench/cifs-2.6.git] / Documentation / devicetree / bindings / ufs / ufshcd-pltfrm.txt

diff --git a/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt b/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt
index 2df00524bd2177fd2506f2ca7ad4efb59cf8aae5..8cf59452c675695a2d03e87646da4981a6db6a63 100644 (file)
--- 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