[v2 PATCH 1/4] Documentation: bindings: add dt doc for Rockchip USB Type-C PHY

[Chris Zhong]

This patch adds a binding that describes the Rockchip USB Type-C PHY
for rk3399

Signed-off-by: Chris Zhong <zyw at rock-chips.com>

---

Changes in v2:
- add some registers description

Changes in v1:
- add extcon node description
- move the registers in phy driver
- remove the suffix of reset

 .../devicetree/bindings/phy/phy-rockchip-typec.txt | 77 ++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/phy-rockchip-typec.txt

diff --git a/Documentation/devicetree/bindings/phy/phy-rockchip-typec.txt b/Documentation/devicetree/bindings/phy/phy-rockchip-typec.txt
new file mode 100644
index 0000000..430920c
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/phy-rockchip-typec.txt
@@ -0,0 +1,77 @@
+* ROCKCHIP type-c PHY
+---------------------
+
+Required properties:
+ - compatible : should be "rockchip,rk3399-typec-phy0" or
+			 "rockchip,rk3399-typec-phy1"
+ - reg: Address and length of the usb phy control register set
+ - rockchip,grf : phandle to the syscon managing the "general
+   register files"
+ - clocks : phandle + clock specifier for the phy clocks
+ - clock-names : string, clock name, must be "tcpdcore", "tcpdphy_ref";
+ - resets : a list of phandle + reset specifier pairs
+ - reset-names : string reset name, must be:
+		 "tcphy", "tcphy_pipe", "uphy_tcphy"
+ - #phy-cells : Must be 0.  See ./phy-bindings.txt for details.
+ - extcon : extcon specifier for the Power Delivery
+
+Note, there are 2 type-c phys for RK3399, and they are almost identical, except
+these registers(description below), every register node contains 3 sections:
+offset, enable bit, write mask bit.
+ - rockchip,typec_conn_dir : the register of type-c connector direction,
+   for type-c phy0, it must be <0xe580 0 16>;
+   for type-c phy1, it must be <0xe58c 0 16>;
+ - rockchip,usb3tousb2_en : the register of type-c force usb3 to usb2 enable
+   control.
+   for type-c phy0, it must be <0xe580 3 19>;
+   for type-c phy1, it must be <0xe58c 3 19>;
+ - rockchip,external_psm : the register of type-c phy external psm clock
+   selection.
+   for type-c phy0, it must be <0xe588 14 30>;
+   for type-c phy1, it must be <0xe594 14 30>;
+ - rockchip,pipe_status : the register of type-c phy pipe status.
+   for type-c phy0, it must be <0xe5c0 0 0>;
+   for type-c phy1, it must be <0xe5c0 16 16>;
+ - rockchip,uphy_dp_sel : the register of type-c phy selection for DP
+   for type-c phy0, it must be <0x6268 19 19>;
+   for type-c phy1, it must be <0x6268 3 19>;
+
+Example:
+	tcphy0: phy at ff7c0000 {
+		compatible = "rockchip,rk3399-typec-phy0";
+		reg = <0x0 0xff7c0000 0x0 0x40000>;
+		#phy-cells = <0>;
+		extcon = <&fusb1>;
+		rockchip,grf = <&grf>;
+		clocks = <&cru SCLK_UPHY0_TCPDCORE>,
+			 <&cru SCLK_UPHY0_TCPDPHY_REF>;
+		clock-names = "tcpdcore", "tcpdphy_ref";
+		resets = <&cru SRST_UPHY0>,
+			 <&cru SRST_UPHY0_PIPE_L00>,
+			 <&cru SRST_P_UPHY0_TCPHY>;
+		reset-names = "tcphy", "tcphy_pipe", "uphy_tcphy";
+		rockchip,typec_conn_dir = <0xe580 0 16>;
+		rockchip,usb3tousb2_en = <0xe580 3 19>;
+		rockchip,external_psm = <0xe588 14 30>;
+		rockchip,pipe_status = <0xe5c0 0 0>;
+		rockchip,uphy_dp_sel = <0x6268 19 19>;
+	};
+
+	tcphy1: phy at ff800000 {
+		compatible = "rockchip,rk3399-typec-phy1";
+		reg = <0x0 0xff800000 0x0 0x40000>;
+		#phy-cells = <0>;
+		rockchip,grf = <&grf>;
+		clocks = <&cru SCLK_UPHY1_TCPDCORE>,
+			 <&cru SCLK_UPHY1_TCPDPHY_REF>;
+		clock-names = "tcpdcore", "tcpdphy_ref";
+		resets = <&cru SRST_UPHY1>,
+		         <&cru SRST_UPHY1_PIPE_L00>,
+			 <&cru SRST_P_UPHY1_TCPHY>;
+		reset-names = "tcphy", "tcphy_pipe", "uphy_tcphy";
+		rockchip,typec_conn_dir = <0xe58c 0 16>;
+		rockchip,usb3tousb2_en = <0xe58c 3 19>;
+		rockchip,external_psm = <0xe594 14 30>;
+		rockchip,pipe_status = <0xe5c0 16 16>;
+		rockchip,uphy_dp_sel = <0x6268 3 19>;
+	};
-- 
2.6.3