diff mbox series

[03/21] usb: dwc3-generic: support external vbus regulator

Message ID 20231121-b4-qcom-common-target-v1-3-9492198e0c15@linaro.org
State Superseded
Headers show
Series Qualcomm generic board support | expand

Commit Message

Caleb Connolly Nov. 21, 2023, 5:09 p.m. UTC 
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>
---
 drivers/usb/dwc3/dwc3-generic.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)
diff mbox series

Patch

diff --git a/drivers/usb/dwc3/dwc3-generic.c b/drivers/usb/dwc3/dwc3-generic.c
index 744fde806948..e66e7961c70f 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_dev;
 };
 
 static int dwc3_generic_probe(struct udevice *dev,
@@ -240,6 +242,13 @@  static int dwc3_generic_host_probe(struct udevice *dev)
 	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 @@  static int dwc3_generic_host_remove(struct udevice *dev)
 	if (rc)
 		return rc;
 
+	if (priv->vbus_dev)
+		regulator_set_enable(priv->vbus_dev, false);
+
 	return dwc3_generic_remove(dev, &priv->gen_priv);
 }