diff options
| author | Piyush Mehta <piyush.mehta@amd.com> | 2023-02-15 15:01:46 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-03-09 15:31:07 +0100 |
| commit | b84ba26c922a99c7541d53ab1971f070b65264fe (patch) | |
| tree | ca2dc52096d41067b20c8eadabc286022cc07710 /drivers/usb/dwc3/core.c | |
| parent | 487e6f420b7a3eed775118635d310ffa024ff7ef (diff) | |
usb: dwc3: core: add external vBus supply support for ulpi phy
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>
Diffstat (limited to 'drivers/usb/dwc3/core.c')
| -rw-r--r-- | drivers/usb/dwc3/core.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 476b63618511..ed0ab90d3fac 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -800,6 +800,16 @@ static int dwc3_phy_setup(struct dwc3 *dwc) if (dwc->dis_u2_freeclk_exists_quirk || dwc->gfladj_refclk_lpm_sel) reg &= ~DWC3_GUSB2PHYCFG_U2_FREECLK_EXISTS; + /* + * Some ULPI USB PHY does not support internal VBUS supply, to drive + * the CPEN pin requires the configuration of the ULPI DRVVBUSEXTERNAL + * bit of OTG_CTRL register. Controller configures the USB2 PHY + * ULPIEXTVBUSDRV bit[17] of the GUSB2PHYCFG register to drive vBus + * with an external supply. + */ + if (dwc->ulpi_ext_vbus_drv) + reg |= DWC3_GUSB2PHYCFG_ULPIEXTVBUSDRV; + dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); return 0; @@ -1553,6 +1563,8 @@ static void dwc3_get_properties(struct dwc3 *dwc) "snps,dis-tx-ipgap-linecheck-quirk"); dwc->resume_hs_terminations = device_property_read_bool(dev, "snps,resume-hs-terminations"); + dwc->ulpi_ext_vbus_drv = device_property_read_bool(dev, + "snps,ulpi-ext-vbus-drv"); dwc->parkmode_disable_ss_quirk = device_property_read_bool(dev, "snps,parkmode-disable-ss-quirk"); dwc->gfladj_refclk_lpm_sel = device_property_read_bool(dev, |