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arm64: dts: imx8mm-venice-gw7901: add support for USB hub subload 

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>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Tim Harvey 2021-07-27 09:11:00 -07:00 committed by Shawn Guo
parent bd306fdb4e
commit 590dc51bca
1 changed files with 4 additions and 3 deletions
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7
arch/arm64/boot/dts/freescale/imx8mm-venice-gw7901.dts
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@ -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>;
@ -822,8 +822,9 @@
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
>;
};