linux-kernel - [PATCH v2 7/9] arm64: dts: amlogic: Used onboard usb hub reset on odroid c4

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Message-Id: <20230118044418.875-8-linux.amoon@gmail.com>
Date:   Wed, 18 Jan 2023 04:44:15 +0000
From:   Anand Moon <linux.amoon@...il.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Cc:     linux-amlogic@...ts.infradead.org,
        Matthias Kaehlcke <mka@...omium.org>,
        Alexander Stein <alexander.stein@...tq-group.com>,
        Johan Hovold <johan@...nel.org>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 7/9] arm64: dts: amlogic: Used onboard usb hub reset on odroid c4

On Odroid c4 previously use gpio-hog to reset the usb hub,
switch to used on-board usb hub reset to enable the usb hub
and enable power to hub.

USB hub is combination of USB 2.0 and USB 3.0 root hub so
use peer-hub node to link then.

Signed-off-by: Anand Moon <linux.amoon@...il.com>
---
v2: - fix the compatible string.
    - Fix the hub node to use peer-hub to link the usb 2.0 and usb 3.0.
---
 .../boot/dts/amlogic/meson-sm1-odroid-c4.dts  | 36 ++++++++++++-------
 1 file changed, 23 insertions(+), 13 deletions(-)

diff --git a/arch/arm64/boot/dts/amlogic/meson-sm1-odroid-c4.dts b/arch/arm64/boot/dts/amlogic/meson-sm1-odroid-c4.dts
index 8c30ce63686e..d04768a66bfe 100644
--- a/arch/arm64/boot/dts/amlogic/meson-sm1-odroid-c4.dts
+++ b/arch/arm64/boot/dts/amlogic/meson-sm1-odroid-c4.dts
@@ -26,20 +26,30 @@ led-blue {
 	sound {
 		model = "ODROID-C4";
 	};
-};
 
-&gpio {
-	/*
-	 * WARNING: The USB Hub on the Odroid-C4 needs a reset signal
-	 * to be turned high in order to be detected by the USB Controller
-	 * This signal should be handled by a USB specific power sequence
-	 * in order to reset the Hub when USB bus is powered down.
-	 */
-	hog-0 {
-		gpio-hog;
-		gpios = <GPIOH_4 GPIO_ACTIVE_HIGH>;
-		output-high;
-		line-name = "usb-hub-reset";
+	/* USB hub supports both USB 2.0 and USB 3.0 root hub */
+	usb-hub {
+		dr_mode = "host";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		/* 2.0 hub on port 1 */
+		hub_2_0: hub@1 {
+			compatible = "usb2109,2817";
+			reg = <1>;
+			peer-hub = <&hub_3_0>;
+			reset-gpios = <&gpio GPIOH_4 GPIO_ACTIVE_LOW>;
+			vdd-supply = <&vcc_5v>;
+		};
+
+		/* 3.1 hub on port 4 */
+		hub_3_0: hub@2 {
+			compatible = "usb2109,817";
+			reg = <2>;
+			peer-hub = <&hub_2_0>;
+			reset-gpios = <&gpio GPIOH_4 GPIO_ACTIVE_LOW>;
+			vdd-supply = <&vcc_5v>;
+		};
 	};
 };
 
-- 
2.38.1