[PATCH 2/3] usb: dwc2: don't use ID/Vbus detection if usb-role-switch on STM32MP15 SoCs

[Amelie Delaunay]

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.

Signed-off-by: Amelie Delaunay <amelie.delau...@st.com>
---
 drivers/usb/dwc2/params.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c
index ce736d67c7c3..d6690ee7af01 100644
--- a/drivers/usb/dwc2/params.c
+++ b/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;
-- 
2.17.1