linux-kernel - [PATCH 2/3] dt-bindings: display/bridge: Add binding for IMX NWL mipi dsi host controller

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Message-Id: <70a5c6617936a4a095e7608b96e3f9fae5ddfbb1.1563983037.git.agx@sigxcpu.org>
Date:   Wed, 24 Jul 2019 17:52:25 +0200
From:   Guido Günther <agx@...xcpu.org>
To:     David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Andrzej Hajda <a.hajda@...sung.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        Lee Jones <lee.jones@...aro.org>,
        Guido Günther <agx@...xcpu.org>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Robert Chiras <robert.chiras@....com>
Subject: [PATCH 2/3] dt-bindings: display/bridge: Add binding for IMX NWL mipi dsi host controller

The Northwest Logic MIPI DSI IP core can be found in NXPs i.MX8 SoCs.

Signed-off-by: Guido Günther <agx@...xcpu.org>
---
 .../bindings/display/bridge/imx-nwl-dsi.txt   | 89 +++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/bridge/imx-nwl-dsi.txt

diff --git a/Documentation/devicetree/bindings/display/bridge/imx-nwl-dsi.txt b/Documentation/devicetree/bindings/display/bridge/imx-nwl-dsi.txt
new file mode 100644
index 000000000000..288fdb726d5a
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/bridge/imx-nwl-dsi.txt
@@ -0,0 +1,89 @@
+Northwest Logic MIPI-DSI on imx SoCs
+=====================================
+
+NWL MIPI-DSI host controller found on i.MX8 platforms. This is a
+dsi bridge for the for the NWL MIPI-DSI host.
+
+Required properties:
+- compatible: 		"fsl,<chip>-nwl-dsi"
+	The following strings are expected:
+			"fsl,imx8mq-nwl-dsi"
+- reg: 			the register range of the MIPI-DSI controller
+- interrupts: 		the interrupt number for this module
+- clock, clock-names: 	phandles to the MIPI-DSI clocks
+	The following clocks are expected on all platforms:
+		"core"    - DSI core clock
+		"tx_esc"  - TX_ESC clock (used in escape mode)
+		"rx_esc"  - RX_ESC clock (used in escape mode)
+		"phy_ref" - PHY_REF clock. Clock is managed by the phy. Only
+                            used to read the clock rate.
+- assigned-clocks:	phandles to clocks that require initial configuration
+- assigned-clock-rates:	rates of the clocks that require initial configuration
+	The following clocks need to have an initial configuration:
+	"tx_esc" (20 MHz) and "rx_esc" (80 Mhz).
+- phys: 		phandle to the phy module representing the DPHY
+			inside the MIPI-DSI IP block
+- phy-names: 		should be "dphy"
+
+Optional properties:
+- power-domains 	phandle to the power domain
+- src			phandle to the system reset controller (required on
+			i.MX8MQ)
+- mux-sel		phandle to the MUX register set (required on i.MX8MQ)
+- assigned-clock-parents phandles to parent clocks that needs to be assigned as
+			parents to clocks defined in assigned-clocks
+
+Example:
+	mipi_dsi: mipi_dsi@...00000 {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		compatible = "fsl,imx8mq-nwl-dsi";
+		reg = <0x30A00000 0x300>;
+		clocks = <&clk IMX8MQ_CLK_DSI_CORE>,
+			 <&clk IMX8MQ_CLK_DSI_AHB>,
+			 <&clk IMX8MQ_CLK_DSI_IPG_DIV>,
+			 <&clk IMX8MQ_CLK_DSI_PHY_REF>;
+		clock-names = "core", "rx_esc", "tx_esc", "phy_ref";
+		assigned-clocks = <&clk IMX8MQ_CLK_DSI_AHB>,
+				  <&clk IMX8MQ_CLK_DSI_CORE>,
+				  <&clk IMX8MQ_CLK_DSI_IPG_DIV>;
+		assigned-clock-parents = <&clk IMX8MQ_SYS1_PLL_80M>,
+					 <&clk IMX8MQ_SYS1_PLL_266M>;
+		assigned-clock-rates = <80000000>,
+				       <266000000>,
+				       <20000000>;
+		interrupts = <GIC_SPI 34 IRQ_TYPE_LEVEL_HIGH>;
+		power-domains = <&pgc_mipi>;
+		src = <&src>;
+		mux-sel = <&iomuxc_gpr>;
+		phys = <&dphy>;
+		phy-names = "dphy";
+		status = "okay";
+
+		panel@0 {
+			compatible = "...";
+			port {
+			     panel_in: endpoint {
+				       remote-endpoint = <&mipi_dsi_out>;
+			     };
+			};
+		};
+
+		ports {
+		      #address-cells = <1>;
+		      #size-cells = <0>;
+
+		      port@0 {
+			     reg = <0>;
+			     mipi_dsi_in: endpoint {
+					  remote-endpoint = <&dcss_disp0_mipi_dsi>;
+			     };
+		      };
+		      port@1 {
+			     reg = <1>;
+			     mipi_dsi_out: endpoint {
+					   remote-endpoint = <&panel_in>;
+			     };
+		      };
+		};
+	};
-- 
2.20.1