usb: dwc3: core: add external vBus supply support for ulpi phy

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Some ULPI USB PHY does not support internal VBUS supply, to drive the CPEN
pin, which requires the configuration of the ULPI DRVVBUSEXTERNAL bit of
OTG_CTRL register.

Added 'snps,ulpi-ext-vbus-drv' a DT property to configure the USB2 PHY to
drive VBUS with an external supply, by setting the USB2 PHY ULPIEXTVBUSDRV
bit[:17] of the GUSB2PHYCFG register to drive VBUS with an external supply.

Signed-off-by: Piyush Mehta <piyush.mehta@amd.com>
Link: https://lore.kernel.org/r/20230215093146.5812-3-piyush.mehta@amd.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Piyush Mehta 2023-02-15 15:01:46 +05:30 • committed by Greg Kroah-Hartman

parent 487e6f420b

commit b84ba26c92

2 changed files with 16 additions and 0 deletions

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12

drivers/usb/dwc3/core.c

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4

drivers/usb/dwc3/core.h

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