[PATCH v10 10/11] media: staging: dt-bindings: Document the Rockchip MIPI RX D-PHY bindings

[Helen Koike <helen.koike@collabora.com>]

From: Jacob Chen <jacob2.chen@rock-chips.com>

Add DT bindings documentation for Rockchip MIPI D-PHY RX

Signed-off-by: Jacob Chen <jacob2.chen@rock-chips.com>
Reviewed-by: Rob Herring <robh@kernel.org>
[refactored for upstream]
Signed-off-by: Helen Koike <helen.koike@collabora.com>

---

Changes in v10:
- unsquash

Changes in v9:
- fix title division style
- squash
- move to staging

Changes in v8: None
Changes in v7:
- updated doc with new design and tested example

 .../bindings/media/rockchip-mipi-dphy.txt     | 38 +++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 drivers/staging/media/rkisp1/Documentation/devicetree/bindings/media/rockchip-mipi-dphy.txt

diff --git a/drivers/staging/media/rkisp1/Documentation/devicetree/bindings/media/rockchip-mipi-dphy.txt b/drivers/staging/media/rkisp1/Documentation/devicetree/bindings/media/rockchip-mipi-dphy.txt
new file mode 100644
index 000000000000..0a0be7b15a59
--- /dev/null
+++ b/drivers/staging/media/rkisp1/Documentation/devicetree/bindings/media/rockchip-mipi-dphy.txt
@@ -0,0 +1,38 @@
+Rockchip SoC MIPI RX D-PHY
+--------------------------
+
+Required properties:
+- compatible: value should be one of the following
+	"rockchip,rk3288-mipi-dphy"
+	"rockchip,rk3399-mipi-dphy"
+- clocks : list of clock specifiers, corresponding to entries in
+	clock-names property;
+- clock-names: required clock name.
+- #phy-cells: Number of cells in a PHY specifier; Should be 0.
+
+MIPI RX D-PHY use registers in "general register files", it
+should be a child of the GRF.
+
+Optional properties:
+- reg: offset and length of the register set for the device.
+- rockchip,grf: MIPI TX1RX1 D-PHY not only has its own register but also
+		the GRF, so it is only necessary for MIPI TX1RX1 D-PHY.
+
+Device node example
+-------------------
+
+grf: syscon@ff770000 {
+	compatible = "rockchip,rk3399-grf", "syscon", "simple-mfd";
+
+...
+
+	dphy: mipi-dphy {
+		compatible = "rockchip,rk3399-mipi-dphy";
+		clocks = <&cru SCLK_MIPIDPHY_REF>,
+			<&cru SCLK_DPHY_RX0_CFG>,
+			<&cru PCLK_VIO_GRF>;
+		clock-names = "dphy-ref", "dphy-cfg", "grf";
+		power-domains = <&power RK3399_PD_VIO>;
+		#phy-cells = <0>;
+	};
+};
-- 
2.22.0