linux-kernel - [PATCH v1 02/11] ARM: dts: amlogic: Used onboard usb hub reset to enable usb hub

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Date:   Wed, 28 Dec 2022 10:03:11 +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, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v1 02/11] ARM: dts: amlogic: Used onboard usb hub reset to enable usb hub

On Odroid c1 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 usb hub.

Add usb hub regulator as per the schematic.

Signed-off-by: Anand Moon <linux.amoon@...il.com>
---
 arch/arm/boot/dts/meson8b-odroidc1.dts | 40 +++++++++++++++++---------
 1 file changed, 27 insertions(+), 13 deletions(-)

diff --git a/arch/arm/boot/dts/meson8b-odroidc1.dts b/arch/arm/boot/dts/meson8b-odroidc1.dts
index 04356bc639fa..3b29169aac43 100644
--- a/arch/arm/boot/dts/meson8b-odroidc1.dts
+++ b/arch/arm/boot/dts/meson8b-odroidc1.dts
@@ -185,6 +185,33 @@ vdd_rtc: regulator-vdd-rtc {
 
 		vin-supply = <&vcc_3v3>;
 	};
+
+	usb_otg_pwr: regulator-usb-pwrs {
+		compatible = "regulator-fixed";
+		regulator-name = "USB_OTG_PWR";
+
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+
+		/* signal name from schematics: PWREN */
+		gpio = <&gpio_ao GPIOAO_5 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		vin-supply = <&p5v0>;
+	};
+
+	usb {
+		dr_mode = "host";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		hub@1 {
+			/* Genesys Logic GL852G-OHG usb hub */
+			compatible = "genesys,usb5e3,610";
+			reg = <1>;
+			vdd-supply = <&usb_otg_pwr>;
+			reset-gpio = <&gpio_ao GPIOAO_4 GPIO_ACTIVE_LOW>;
+		};
+	};
 };
 
 &cpu0 {
@@ -281,19 +308,6 @@ &gpio_ao {
 			  "J7 Header Pin 6", "J7 Header Pin 5",
 			  "J7 Header Pin 7", "HDMI_CEC",
 			  "SYS_LED", "", "";
-
-	/*
-	 * WARNING: The USB Hub on the Odroid-C1/C1+ 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.
-	 */
-	usb-hub {
-		gpio-hog;
-		gpios = <GPIOAO_4 GPIO_ACTIVE_HIGH>;
-		output-high;
-		line-name = "usb-hub-reset";
-	};
 };
 
 &ir_receiver {
-- 
2.38.1