[PATCH 4/4] usb: musb-new: Add compatibles for ti,musb-am33xx

Markus Schneider-Pargmann (TI.com)
2025-11-26T22:50:56Z

The upstream devicetree am33xx.dtsi does not have a "ti,am33xx-usb"
compatible, it uses "ti,sysc-omap4" for the same node. The
implementation of ti-musb uses a wrapper driver that binds to
ti,am33xx-usb and creates new devices ti-musb-host and
ti-musb-peripheral depending on the dr_mode property.

To avoid this wrapper driver with the upstream devicetree, add
compatibles for "ti,musb-am33xx" to both ti-musb-host and
ti-musb-peripheral. Add a bind function that checks for the correct
dr_mode value and rejects binding if it is not the correct driver.

Signed-off-by: Markus Schneider-Pargmann (TI.com) <msp@baylibre.com>
---
drivers/usb/musb-new/ti-musb.c | 34 ++++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)

diff --git a/drivers/usb/musb-new/ti-musb.c b/drivers/usb/musb-new/ti-musb.c
index d3c3d3057c1df2a5cc62df3c57d8b071bb0f12b8..3ed6428d09883cf5af28b212c0d614b3d8ef9227 100644
--- a/drivers/usb/musb-new/ti-musb.c
+++ b/drivers/usb/musb-new/ti-musb.c
@@ -183,6 +183,16 @@ static int ti_musb_host_remove(struct udevice *dev)
}

#if CONFIG_IS_ENABLED(OF_CONTROL)
+static int ti_musb_host_bind(struct udevice *dev)
+{
+ enum usb_dr_mode dr_mode = usb_get_dr_mode(dev_ofnode(dev));
+
+ if (dr_mode != USB_DR_MODE_HOST && dr_mode != USB_DR_MODE_OTG)
+ return -ENODEV;
+
+ return 0;
+}
+
static int ti_musb_host_of_to_plat(struct udevice *dev)
{
struct ti_musb_plat *plat = dev_get_plat(dev);
@@ -200,12 +210,19 @@ static int ti_musb_host_of_to_plat(struct udevice *dev)

return 0;
}
+
+static const struct udevice_id ti_musb_host_ids[] = {
+ { .compatible = "ti,musb-am33xx" },
+ { }
+};
#endif

U_BOOT_DRIVER(ti_musb_host) = {
.name = "ti-musb-host",
.id = UCLASS_USB,
#if CONFIG_IS_ENABLED(OF_CONTROL)
+ .of_match = ti_musb_host_ids,
+ .bind = ti_musb_host_bind,
.of_to_plat = ti_musb_host_of_to_plat,
#endif
.probe = ti_musb_host_probe,
@@ -221,6 +238,16 @@ struct ti_musb_peripheral {
};

#if CONFIG_IS_ENABLED(OF_CONTROL)
+static int ti_musb_peripheral_bind(struct udevice *dev)
+{
+ enum usb_dr_mode dr_mode = usb_get_dr_mode(dev_ofnode(dev));
+
+ if (dr_mode != USB_DR_MODE_PERIPHERAL)
+ return -ENODEV;
+
+ return 0;
+}
+
static int ti_musb_peripheral_of_to_plat(struct udevice *dev)
{
struct ti_musb_plat *plat = dev_get_plat(dev);
@@ -237,6 +264,11 @@ static int ti_musb_peripheral_of_to_plat(struct udevice *dev)

return 0;
}
+
+static const struct udevice_id ti_musb_peripheral_ids[] = {
+ { .compatible = "ti,musb-am33xx" },
+ { }
+};
#endif

static int ti_musb_peripheral_probe(struct udevice *dev)
@@ -283,6 +315,8 @@ U_BOOT_DRIVER(ti_musb_peripheral) = {
.name = "ti-musb-peripheral",
.id = UCLASS_USB_GADGET_GENERIC,
#if CONFIG_IS_ENABLED(OF_CONTROL)
+ .of_match = ti_musb_peripheral_ids,
+ .bind = ti_musb_peripheral_bind,
.of_to_plat = ti_musb_peripheral_of_to_plat,
#endif
.ops = &ti_musb_gadget_ops,

--
2.51.0