diff options
| author | Caleb Connolly <caleb.connolly@linaro.org> | 2024-02-26 17:26:06 +0000 |
|---|---|---|
| committer | Caleb Connolly <caleb.connolly@linaro.org> | 2024-03-01 14:44:35 +0000 |
| commit | de451d5d5b6f1913b7a7c270e7e5ff606342f126 (patch) | |
| tree | e018ad3d5f537c6e90bd8c25aee265d2066e17ac /drivers/usb | |
| parent | ca84ba63858a607fe2dabf56ed593d7808d2689d (diff) | |
| download | u-boot-de451d5d5b6f1913b7a7c270e7e5ff606342f126.tar.gz | |
usb: dwc3-generic: support external vbus regulator
Add support for a vbus-supply regulator specified in devicetree. This
provides generic support to avoid hardcoded GPIO configuration in board
init code.
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/dwc3/dwc3-generic.c | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/drivers/usb/dwc3/dwc3-generic.c b/drivers/usb/dwc3/dwc3-generic.c index 6fb2de8a5ac..a379a0002e7 100644 --- a/drivers/usb/dwc3/dwc3-generic.c +++ b/drivers/usb/dwc3/dwc3-generic.c @@ -21,6 +21,7 @@ #include <linux/usb/ch9.h> #include <linux/usb/gadget.h> #include <malloc.h> +#include <power/regulator.h> #include <usb.h> #include "core.h" #include "gadget.h" @@ -47,6 +48,7 @@ struct dwc3_generic_priv { struct dwc3_generic_host_priv { struct xhci_ctrl xhci_ctrl; struct dwc3_generic_priv gen_priv; + struct udevice *vbus_supply; }; static int dwc3_generic_probe(struct udevice *dev, @@ -240,11 +242,24 @@ static int dwc3_generic_host_probe(struct udevice *dev) if (rc) return rc; + rc = device_get_supply_regulator(dev, "vbus-supply", &priv->vbus_supply); + if (rc) + debug("%s: No vbus regulator found: %d\n", dev->name, rc); + + /* Only returns an error if regulator is valid and failed to enable due to a driver issue */ + rc = regulator_set_enable_if_allowed(priv->vbus_supply, true); + if (rc) + return rc; + hccr = (struct xhci_hccr *)priv->gen_priv.base; hcor = (struct xhci_hcor *)(priv->gen_priv.base + HC_LENGTH(xhci_readl(&(hccr)->cr_capbase))); - return xhci_register(dev, hccr, hcor); + rc = xhci_register(dev, hccr, hcor); + if (rc) + regulator_set_enable_if_allowed(priv->vbus_supply, false); + + return rc; } static int dwc3_generic_host_remove(struct udevice *dev) @@ -252,9 +267,12 @@ static int dwc3_generic_host_remove(struct udevice *dev) struct dwc3_generic_host_priv *priv = dev_get_priv(dev); int rc; - rc = xhci_deregister(dev); + /* This function always returns 0 */ + xhci_deregister(dev); + + rc = regulator_set_enable_if_allowed(priv->vbus_supply, false); if (rc) - return rc; + debug("%s: Failed to disable vbus regulator: %d\n", dev->name, rc); return dwc3_generic_remove(dev, &priv->gen_priv); } |