[PATCH 3/4] arm64: dts: imx8mm-venice-gw7901: add support for USB hub subload
From: Tim Harvey <tharvey@gateworks.com>
Date: 2021-06-01 18:06:48
Also in:
linux-devicetree
Subsystem:
arm/freescale imx / mxc arm architecture, the rest · Maintainers:
Frank Li, Sascha Hauer, Linus Torvalds
The USB hub has it's reset as GPIO4_IO17 but can be sub-loaded and VBUS provided by a VBUS regulator with GPIO4_IO2 as the enable and GPIO1_IO15 as the active-low over-current. Enable pull-up for GPIO4_IO17 to keep hub out of reset and move VBUS enable to GPIO4_IO2. Additionally enable pull-up on GPIO1_IO15 so that if the hub is loaded it never over-currents. This allows USB to work in both configurations without a device-tree change. Signed-off-by: Tim Harvey <tharvey@gateworks.com> --- arch/arm64/boot/dts/freescale/imx8mm-venice-gw7901.dts | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-venice-gw7901.dts b/arch/arm64/boot/dts/freescale/imx8mm-venice-gw7901.dts
index 5a1e9df39bec..db43ee28bdb6 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-venice-gw7901.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mm-venice-gw7901.dts@@ -216,7 +216,7 @@ pinctrl-0 = <&pinctrl_reg_usb2>; compatible = "regulator-fixed"; regulator-name = "usb_usb2_vbus"; - gpio = <&gpio4 17 GPIO_ACTIVE_HIGH>; + gpio = <&gpio4 2 GPIO_ACTIVE_HIGH>; enable-active-high; regulator-min-microvolt = <5000000>; regulator-max-microvolt = <5000000>;
@@ -824,8 +824,9 @@ pinctrl_reg_usb2: regusb1grp { fsl,pins = < - MX8MM_IOMUXC_SAI1_TXD5_GPIO4_IO17 0x41 - MX8MM_IOMUXC_GPIO1_IO15_USB2_OTG_OC 0x41 + MX8MM_IOMUXC_SAI1_RXD0_GPIO4_IO2 0x41 + MX8MM_IOMUXC_SAI1_TXD5_GPIO4_IO17 0x140 + MX8MM_IOMUXC_GPIO1_IO15_USB2_OTG_OC 0x140 >; };
--
2.17.1
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