usb: dwc2: don't use ID/Vbus detection if usb-role-switch on STM32MP15 SoCs

If usb-role-switch is present in the device tree, it means that ID and Vbus
signals are not connected to the OTG controller but to an external
component (GPIOs, Type-C controller). In this configuration, usb role
switch is used to force valid sessions on STM32MP15 SoCs.
Acked-by: Minas Harutyunyan <hminas@synopsys.com>
Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>

drivers/usb/dwc2/params.c

@@ -183,9 +183,11 @@ static void dwc2_set_stm32mp15_fsotg_params(struct dwc2_hsotg *hsotg)
 static void dwc2_set_stm32mp15_hsotg_params(struct dwc2_hsotg *hsotg)
 {
 	struct dwc2_core_params *p = &hsotg->params;
+	struct device_node *np = hsotg->dev->of_node;
 
 	p->otg_cap = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE;
-	p->activate_stm_id_vb_detection = true;
+	p->activate_stm_id_vb_detection =
+		!of_property_read_bool(np, "usb-role-switch");
 	p->host_rx_fifo_size = 440;
 	p->host_nperio_tx_fifo_size = 256;
 	p->host_perio_tx_fifo_size = 256;