linux-kernel - [PATCH v2] ARM: dts: samsung: exynos4412-midas: add USB connector and USB OTG

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Date:   Sun, 23 Jul 2023 16:24:17 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        replicant@...osl.org, phone-devel@...r.kernel.org,
        ~postmarketos/upstreaming@...ts.sr.ht,
        Martin Jücker <martin.juecker@...il.com>,
        Henrik Grimler <henrik@...mler.se>,
        Artur Weber <aweber.kernel@...il.com>
Subject: [PATCH v2] ARM: dts: samsung: exynos4412-midas: add USB connector and USB OTG

Add full description of USB-MUIC (MAX77693 MUIC) and MUIC-MHL
connections, along with proper USB connector and OTG mode for DWC2 USB
controller.

This fixes dtc W=1 warnings:

  Warning (graph_child_address): /i2c-mhl/hdmi-bridge@...ports: graph node has single child node 'port@0', #address-cells/#size-cells are not necessary

Cc: Marek Szyprowski <m.szyprowski@...sung.com>
Cc: replicant@...osl.org
Cc: phone-devel@...r.kernel.org
Cc: ~postmarketos/upstreaming@...ts.sr.ht
Cc: Martin Jücker <martin.juecker@...il.com>
Cc: Henrik Grimler <henrik@...mler.se>
Cc: Artur Weber <aweber.kernel@...il.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>

---

Changes in v2:
1. Put connector node in the muic node (Henrik)

Not tested on hardware. Please kindly check if peripheral mode is not
broken. Or maybe OTG started to work?
---
 .../boot/dts/samsung/exynos4412-midas.dtsi    | 50 ++++++++++++++++++-
 1 file changed, 49 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/samsung/exynos4412-midas.dtsi b/arch/arm/boot/dts/samsung/exynos4412-midas.dtsi
index 57836d5554d0..7daf25865551 100644
--- a/arch/arm/boot/dts/samsung/exynos4412-midas.dtsi
+++ b/arch/arm/boot/dts/samsung/exynos4412-midas.dtsi
@@ -182,6 +182,38 @@ pmic@66 {
 			pinctrl-0 = <&max77693_irq>;
 			reg = <0x66>;
 
+			muic {
+				compatible = "maxim,max77693-muic";
+
+				connector {
+					compatible = "samsung,usb-connector-11pin",
+						     "usb-b-connector";
+					label = "micro-USB";
+					type = "micro";
+
+					ports {
+						#address-cells = <1>;
+						#size-cells = <0>;
+
+						port@0 {
+							reg = <0>;
+
+							muic_to_usb: endpoint {
+								remote-endpoint = <&usb_to_muic>;
+							};
+						};
+
+						port@3 {
+							reg = <3>;
+
+							muic_to_mhl: endpoint {
+								remote-endpoint = <&mhl_to_muic>;
+							};
+						};
+					};
+				};
+			};
+
 			regulators {
 				esafeout1_reg: ESAFEOUT1 {
 					regulator-name = "ESAFEOUT1";
@@ -287,6 +319,14 @@ mhl_to_hdmi: endpoint {
 						remote-endpoint = <&hdmi_to_mhl>;
 					};
 				};
+
+				port@1 {
+					reg = <1>;
+
+					mhl_to_muic: endpoint {
+						remote-endpoint = <&muic_to_mhl>;
+					};
+				};
 			};
 		};
 	};
@@ -545,8 +585,16 @@ hdmi_to_mhl: endpoint {
 &hsotg {
 	vusb_d-supply = <&ldo15_reg>;
 	vusb_a-supply = <&ldo12_reg>;
-	dr_mode = "peripheral";
+	dr_mode = "otg";
+	role-switch-default-mode = "peripheral";
+	usb-role-switch;
 	status = "okay";
+
+	port {
+		usb_to_muic: endpoint {
+			remote-endpoint = <&muic_to_usb>;
+		};
+	};
 };
 
 &i2c_0 {
-- 
2.34.1