Re: [PATCH v3 4/7] dt-bindings: phy: Add document for phy-mtk-ufs
From: Rob Herring <hidden>
Date: 2019-03-12 13:25:24
Also in:
linux-mediatek, linux-scsi
On Wed, Feb 27, 2019 at 03:23:09PM +0800, Stanley Chu wrote:
quoted hunk
Add UFS M-PHY node document for MediaTek SoC chips. Signed-off-by: Stanley Chu <stanley.chu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org> --- .../devicetree/bindings/phy/phy-mtk-ufs.txt | 35 +++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 Documentation/devicetree/bindings/phy/phy-mtk-ufs.txtdiff --git a/Documentation/devicetree/bindings/phy/phy-mtk-ufs.txt b/Documentation/devicetree/bindings/phy/phy-mtk-ufs.txt new file mode 100644 index 000000000000..5fc22c7fe0bc --- /dev/null +++ b/Documentation/devicetree/bindings/phy/phy-mtk-ufs.txt@@ -0,0 +1,35 @@ +MediaTek Universal Flash Storage (UFS) M-PHY binding +-------------------------------------------------------- + +UFS M-PHY nodes are defined to describe on-chip UFS M-PHY hardware macro. +Each UFS M-PHY node should have its own node. + +To bind UFS M-PHY with UFS host controller, the controller node should +contain a phandle reference to UFS M-PHY node. + +Required properties for UFS M-PHY nodes: +- compatible : Compatible list, contains the following controller: + "mediatek,ufs-mphy"
Needs a more specific compatible string.
+- reg : Address and length of the UFS M-PHY register set.
+- #phy-cells : This property shall be set to 0
+- 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. "unipro-clk" and
+ "mp-clk" are mandatory.
+
+Example:
+
+ ufs_mphy: ufs_mphy@11fa0000 {phy@...
+ compatible = "mediatek,ufs-mphy";
+ reg = <0 0x11fa0000 0 0xc000>;
+ #phy-cells = <0>;
+
+ clocks = <&infracfg_ao INFRACFG_AO_UNIPRO_SCK_CG>,
+ <&infracfg_ao INFRACFG_AO_UFS_MP_SAP_BCLK_CG>;
+ clock-names = "unipro-clk", "mp-clk";
+ };
+
+ ufshci:ufshci@11270000 {
+ ...
+ phys = <&ufs_mphy>;
+ };
--
2.18.0