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Subject[PATCH 2/2] ARM: dts: imx6qdl-nitrogen6x: fix USB PHY reset
Date
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(+)

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";
};

--
2.11.0
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