add ufs node document for hi3660
Signed-off-by: Bu Tao <butao@xxxxxxxxxxxxx>
---
.../devicetree/bindings/ufs/hi3660-ufs.txt | 58 ++++++++++++++++++++++
1 file changed, 58 insertions(+)
create mode 100644 Documentation/devicetree/bindings/ufs/hi3660-ufs.txt
diff --git a/Documentation/devicetree/bindings/ufs/hi3660-ufs.txt b/Documentation/devicetree/bindings/ufs/hi3660-ufs.txt
new file mode 100644
index 000000000000..461afc8ef017
--- /dev/null
+++ b/Documentation/devicetree/bindings/ufs/hi3660-ufs.txt
@@ -0,0 +1,58 @@
+* Hisilicon Universal Flash Storage (UFS) Host Controller
+
+UFS nodes are defined to describe on-chip UFS hardware macro.
+Each UFS Host Controller should have its own node.
+
+Required properties:
+- compatible : compatible list, contains one of the following -
+ "hisilicon,hi3660-ufs" for hisi ufs host controller
+ present on Hi3660 chipset.
+- reg : should contain UFS register address space & UFS SYS CTRL register address,
+- interrupt-parent : interrupt device
+- interrupts : interrupt number
+- 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. "clk_ref", "clk_phy" is optional
+- resets : reset node register, one reset the clk and the other reset the controller
+- reset-names : describe reset node register
+
+Optional properties for board device:
+- ufs-hi3660-use-rate-B : specifies UFS rate-B
+- ufs-hi3660-broken-fastauto : specifies no fastauto
+- ufs-hi3660-use-HS-GEAR3 : specifies UFS HS-GEAR3
+- ufs-hi3660-use-HS-GEAR2 : specifies UFS HS-GEAR2
+- ufs-hi3660-use-HS-GEAR1 : specifies UFS HS-GEAR1
+- ufs-hi3660-broken-clk-gate-bypass : specifies no clk-gate
+- ufs-hi3660-use-one-line : specifies UFS use one line work
+- reset-gpio : specifies to reset devices
+
+Example:
+
+ ufs: ufs@ff3b0000 {
+ compatible = "jedec,ufs-1.1", "hisilicon,hi3660-ufs";
+ /* 0: HCI standard */
+ /* 1: UFS SYS CTRL */
+ reg = <0x0 0xff3b0000 0x0 0x1000>,
+ <0x0 0xff3b1000 0x0 0x1000>;
+ interrupt-parent = <&gic>;
+ interrupts = <GIC_SPI 278 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&crg_ctrl HI3660_CLK_GATE_UFSIO_REF>,
+ <&crg_ctrl HI3660_CLK_GATE_UFSPHY_CFG>;
+ clock-names = "clk_ref", "clk_phy";
+ freq-table-hz = <0 0>, <0 0>;
+ /* offset: 0x84; bit: 12 */
+ /* offset: 0x84; bit: 7 */
+ resets = <&crg_rst 0x84 12>,
+ <&crg_rst 0x84 7>;
+ reset-names = "rst", "assert";
+ }
+
+ &ufs {
+ ufs-hi3660-use-rate-B;
+ ufs-hi3660-broken-fastauto;
+ ufs-hi3660-use-HS-GEAR3;
+ ufs-hi3660-broken-clk-gate-bypass;
+ reset-gpio = <&gpio18 1 0>;
+ status = "okay";
+ }
+
--
2.11.GIT
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