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[2/2] ARM: dts: imx6qdl-nitrogen6x: fix USB PHY reset

Message ID 20170724085005.22101-3-gary.bisson@boundarydevices.com (mailing list archive)
State New, archived
Headers show

Commit Message

Gary Bisson July 24, 2017, 8:50 a.m. UTC 
Declared as a regulator since the driver doesn't have a reset-gpios
property for this.

This ensures that the PHY is woken up, not depending on the state the
second stage bootloader leaves the pin.

This is a workaround until a proper mechanism is provided to reset such
devices like the pwrseq library [1] for instance.

[1] https://lkml.org/lkml/2017/2/10/779

Signed-off-by: Gary Bisson <gary.bisson@boundarydevices.com>
---
 arch/arm/boot/dts/imx6qdl-nitrogen6x.dtsi | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
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Patch

diff --git a/arch/arm/boot/dts/imx6qdl-nitrogen6x.dtsi b/arch/arm/boot/dts/imx6qdl-nitrogen6x.dtsi
index f22e5879340b..989376643cf6 100644
--- a/arch/arm/boot/dts/imx6qdl-nitrogen6x.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-nitrogen6x.dtsi
@@ -108,6 +108,19 @@ 
 			startup-delay-us = <70000>;
 			enable-active-high;
 		};
+
+		reg_usb_h1_vbus: regulator@5 {
+			compatible = "regulator-fixed";
+			reg = <5>;
+			pinctrl-names = "default";
+			pinctrl-0 = <&pinctrl_usbh1>;
+			regulator-name = "usb_h1_vbus";
+			regulator-min-microvolt = <3300000>;
+			regulator-max-microvolt = <3300000>;
+			gpio = <&gpio7 12 GPIO_ACTIVE_HIGH>;
+			enable-active-high;
+			regulator-always-on;
+		};
 	};
 
 	gpio-keys {
@@ -515,6 +528,12 @@ 
 			>;
 		};
 
+		pinctrl_usbh1: usbh1grp {
+			fsl,pins = <
+				MX6QDL_PAD_GPIO_17__GPIO7_IO12		0x030b0
+			>;
+		};
+
 		pinctrl_usbotg: usbotggrp {
 			fsl,pins = <
 				MX6QDL_PAD_GPIO_1__USB_OTG_ID	0x17059
@@ -629,6 +648,7 @@ 
 };
 
 &usbh1 {
+	vbus-supply = <&reg_usb_h1_vbus>;
 	status = "okay";
 };