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ARM: tegra: nyan: Maintain power to USB ports on boot

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USB ports are turned on by the firmware as it looks for disks to boot,
ensure that they aren't power cycled before the xHCI driver comes up.

This enables USB devices to be ready for use faster and reduces wear
and risk of data loss on storage devices. A particularly annoying case
was booting from a mechanical disk, which takes time to spin up again.

Vendor kernel also kept these ports powered, and by the same means.

Signed-off-by: Michal Pecio <michal.pecio@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Michal Pecio 2024-12-04 21:44:43 +01:00 committed by Thierry Reding
parent 40384c840e
commit cec785a7f2
1 changed files with 2 additions and 0 deletions
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2
arch/arm/boot/dts/nvidia/tegra124-nyan.dtsi
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@ -716,6 +716,7 @@ vdd_usb1_vbus: regulator-usb1 {
regulator-name = "+5V_USB_HS";
regulator-min-microvolt = <5000000>;
regulator-max-microvolt = <5000000>;
regulator-boot-on;
gpio = <&gpio TEGRA_GPIO(N, 4) GPIO_ACTIVE_HIGH>;
enable-active-high;
gpio-open-drain;
@ -727,6 +728,7 @@ vdd_usb3_vbus: regulator-usb3 {
regulator-name = "+5V_USB_SS";
regulator-min-microvolt = <5000000>;
regulator-max-microvolt = <5000000>;
regulator-boot-on;
gpio = <&gpio TEGRA_GPIO(N, 5) GPIO_ACTIVE_HIGH>;
enable-active-high;
gpio-open-drain;