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.
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
---
This patch has no dependencies
Cc: Marek Vasut <marex@denx.de>
diff --git a/drivers/usb/dwc3/dwc3-generic.c b/drivers/usb/dwc3/dwc3-generic.c
index 744fde8..e66e796 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_host_priv {
struct xhci_ctrl xhci_ctrl;
struct dwc3_generic_priv gen_priv;
+ struct udevice *vbus_dev;
};
static int dwc3_generic_probe(struct udevice *dev,
@@ -240,6 +242,13 @@
if (rc)
return rc;
+ rc = device_get_supply_regulator(dev, "vbus-supply", &priv->vbus_dev);
+ if (rc)
+ debug("%s: No vbus regulator found: %d\n", dev->name, rc);
+
+ if (priv->vbus_dev)
+ regulator_set_enable(priv->vbus_dev, true);
+
hccr = (struct xhci_hccr *)priv->gen_priv.base;
hcor = (struct xhci_hcor *)(priv->gen_priv.base +
HC_LENGTH(xhci_readl(&(hccr)->cr_capbase)));
@@ -256,6 +265,9 @@
if (rc)
return rc;
+ if (priv->vbus_dev)
+ regulator_set_enable(priv->vbus_dev, false);
+
return dwc3_generic_remove(dev, &priv->gen_priv);
}