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ipq40xx: Linksys MR8300: fix the USB port power 

The USB port on the MR8300 randomly fails to feed bus-powered devices.

This is caused by a misconfigured pinmux. The GPIO68 should be used to
enable the USB power (active low), but it's inside the NAND pinmux.

This GPIO pin was found in the original firmware at a startup script in
both MR8300 and EA8300. Therefore apply the fix for both boards.

Signed-off-by: Daniel González Cabanelas <dgcbueu@gmail.com>
Reviewed-by: Robert Marko <robimarko@gmail.com>
This commit is contained in:
Daniel González Cabanelas 2023-02-16 23:04:20 +01:00 committed by Hauke Mehrtens
parent 688697889c
commit ed64c33235
1 changed files with 11 additions and 1 deletions
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12
target/linux/ipq40xx/files/arch/arm/boot/dts/qcom-ipq4019-xx8300.dtsi
View File

@ -100,6 +100,16 @@
status = "okay";
};
};
regulator-usb-vbus {
compatible = "regulator-fixed";
regulator-name = "USB_VBUS";
regulator-min-microvolt = <5000000>;
regulator-max-microvolt = <5000000>;
regulator-always-on;
regulator-boot-on;
gpio = <&tlmm 68 GPIO_ACTIVE_LOW>;
};
};
@ -268,7 +278,7 @@
pins = "gpio55", "gpio56", "gpio57",
"gpio60", "gpio62", "gpio63",
"gpio64", "gpio65", "gpio66",
"gpio67", "gpio68", "gpio69";
"gpio67", "gpio69";
function = "qpic";
bias-pull-down;
};