linux-kernel - [RFC][PATCH v2 4/5] dt-bindings: usb: dwc3: of-simple: add compatible for HiSi

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Message-Id: <20191007175553.66940-5-john.stultz@linaro.org>
Date:   Mon,  7 Oct 2019 17:55:52 +0000
From:   John Stultz <john.stultz@...aro.org>
To:     lkml <linux-kernel@...r.kernel.org>
Cc:     John Stultz <john.stultz@...aro.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Felipe Balbi <balbi@...nel.org>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Yu Chen <chenyu56@...wei.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Chunfeng Yun <chunfeng.yun@...iatek.com>,
        linux-usb@...r.kernel.org, devicetree@...r.kernel.org
Subject: [RFC][PATCH v2 4/5] dt-bindings: usb: dwc3: of-simple: add compatible for HiSi

Add necessary compatible flag for HiSi's DWC3 so
dwc3-of-simple will probe.

Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Felipe Balbi <balbi@...nel.org>
Cc: Andy Shevchenko <andy.shevchenko@...il.com>
Cc: Rob Herring <robh+dt@...nel.org>
Cc: Mark Rutland <mark.rutland@....com>
Cc: Yu Chen <chenyu56@...wei.com>
Cc: Matthias Brugger <matthias.bgg@...il.com>
Cc: Chunfeng Yun <chunfeng.yun@...iatek.com>
Cc: linux-usb@...r.kernel.org
Cc: devicetree@...r.kernel.org
Signed-off-by: John Stultz <john.stultz@...aro.org>
---
v2: Tweaked clock names as clk_usb3phy_ref didn't seem right.
---
 .../devicetree/bindings/usb/hisi,dwc3.txt     | 52 +++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/hisi,dwc3.txt

diff --git a/Documentation/devicetree/bindings/usb/hisi,dwc3.txt b/Documentation/devicetree/bindings/usb/hisi,dwc3.txt
new file mode 100644
index 000000000000..3a3e5c320f2a
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/hisi,dwc3.txt
@@ -0,0 +1,52 @@
+HiSi SuperSpeed DWC3 USB SoC controller
+
+Required properties:
+- compatible:		should contain "hisilicon,hi3660-dwc3" for HiSi SoC
+- clocks:		A list of phandle + clock-specifier pairs for the
+			clocks listed in clock-names
+- clock-names:		Should contain the following:
+  "clk_abb_usb"		USB reference clk
+  "aclk_usb3otg"	USB3 OTG aclk
+
+- assigned-clocks:	Should be:
+				HI3660_ACLK_GATE_USB3OTG
+- assigned-clock-rates: Should be:
+				229Mhz (229000000) for HI3660_ACLK_GATE_USB3OTG
+
+Optional properties:
+- resets:		Phandle to reset control that resets core and wrapper.
+
+Required child node:
+A child node must exist to represent the core DWC3 IP block. The name of
+the node is not important. The content of the node is defined in dwc3.txt.
+
+Example device nodes:
+
+	usb3: hisi_dwc3 {
+		compatible = "hisilicon,hi3660-dwc3";
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		clocks = <&crg_ctrl HI3660_CLK_ABB_USB>,
+			 <&crg_ctrl HI3660_ACLK_GATE_USB3OTG>;
+		clock-names = "clk_abb_usb", "aclk_usb3otg";
+
+		assigned-clocks = <&crg_ctrl HI3660_ACLK_GATE_USB3OTG>;
+		assigned-clock-rates = <229 000 000>;
+		resets = <&crg_rst 0x90 8>,
+			 <&crg_rst 0x90 7>,
+			 <&crg_rst 0x90 6>,
+			 <&crg_rst 0x90 5>;
+
+		dwc3: dwc3@...00000 {
+			compatible = "snps,dwc3";
+			reg = <0x0 0xff100000 0x0 0x100000>;
+			interrupts = <0 159 4>, <0 161 4>;
+			phys = <&usb_phy>;
+			phy-names = "usb3-phy";
+			dr_mode = "otg";
+
+			...
+		};
+	};
-- 
2.17.1