Commit 487e6f42 authored by Piyush Mehta's avatar Piyush Mehta Committed by Greg Kroah-Hartman
Browse files

dt-bindings: usb: dwc3: Add snps,ulpi-ext-vbus-drv quirk 



Some ULPI USB PHYs do not support an internal vBus supply, to drive the
CPEN pin properly, it requires configuration of the ULPI DRVVBUSEXTERNAL
bit of the USB ULPI PHY OTG_CTRL register.

Added 'snps,ulpi-ext-vbus-drv' DT property to configure the USB2 PHY to
drives VBUS with an external supply.

When the ULPIEXTVBUSDRV bit is set to '1' in the Global USB2 PHY
Configuration registers, PHY drive vBus with an external 5V supply source.

Signed-off-by: default avatarPiyush Mehta <piyush.mehta@amd.com>
Acked-by: default avatarKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230215093146.5812-2-piyush.mehta@amd.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent aa78a736

Documentation/devicetree/bindings/usb/snps,dwc3.yaml

+8 −0
Original line number Diff line number Diff line
@@ -260,6 +260,14 @@ properties: 
      of resume. This option is to support certain legacy ULPI PHYs.

    type: boolean



  snps,ulpi-ext-vbus-drv:

    description:

      Some ULPI USB PHY does not support internal VBUS supply, and driving

      the CPEN pin, requires the configuration of the ulpi DRVVBUSEXTERNAL

      bit. When set, the xhci host will configure the USB2 PHY drives VBUS

      with an external supply.

    type: boolean



  snps,is-utmi-l1-suspend:

    description:

      True when DWC3 asserts output signal utmi_l1_suspend_n, false when