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| author | Andrejs Cainikovs <andrejs.cainikovs@toradex.com> | 2023-12-12 09:27:25 -0300 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2023-12-12 16:33:53 -0500 |
| commit | 32c9dfcc56e61728f4254b9a5765db1c1466f423 (patch) | |
| tree | 0d9144b1db339f11fb82beb96d4822f33f336423 /arch | |
| parent | ad3a4f91e7ca7002d71920417ca529e7e8e7460a (diff) | |
| download | u-boot-32c9dfcc56e61728f4254b9a5765db1c1466f423.tar.gz u-boot-32c9dfcc56e61728f4254b9a5765db1c1466f423.tar.bz2 u-boot-32c9dfcc56e61728f4254b9a5765db1c1466f423.zip | |
apalis-imx8: add USBH_EN gpio hog
USB host interface is not working on some Apalis Toradex carrier
boards with Apalis iMX8 SoM. This is due to USBH_EN pin, which
powers USB peripherals, having a strong pull-down on some boards,
and a weak pull-down on the others. This USBH_EN pin is left
unconfigured, which means it is in its default state at cold boot:
input with a strong pull-up. As a result, carrier boards with a
weak pull-down have this signal high enough to trigger power
delivery to USB peripherals, and opposite - boards with strong
pull-down on USBH_EN have this signal below the threshold needed
to trigger USB power delivery.
This change configures the USBH_EN pin as gpio hog, fixing this
issue for all Apalis carrier boards regardless of pull-down
resistor value.
Also, update apalis-imx8_defconfig via savedefconfig.
Signed-off-by: Andrejs Cainikovs <andrejs.cainikovs@toradex.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/dts/fsl-imx8qm-apalis-u-boot.dtsi | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm/dts/fsl-imx8qm-apalis-u-boot.dtsi b/arch/arm/dts/fsl-imx8qm-apalis-u-boot.dtsi index f2d6b183ed..c54a59e89c 100644 --- a/arch/arm/dts/fsl-imx8qm-apalis-u-boot.dtsi +++ b/arch/arm/dts/fsl-imx8qm-apalis-u-boot.dtsi @@ -93,6 +93,12 @@ &gpio4 { bootph-some-ram; + + usbh_en { + gpio-hog; + gpios = <4 GPIO_ACTIVE_HIGH>; + output-high; + }; }; &gpio5 { |