[PATCH RFC v3 08/10] usb: dwc3: qcom: notify EUD driver of role changes

[Elson Serrao <elson.serrao@oss.qualcomm.com>]

The EUD driver needs USB role information to control its operation as
it is incompatible with host mode. Notify the EUD driver when role
changes occur so it can manage its state accordingly.

Signed-off-by: Elson Serrao <elson.serrao@oss.qualcomm.com>
---
 drivers/usb/dwc3/Kconfig     |  1 +
 drivers/usb/dwc3/dwc3-qcom.c | 10 ++++++++++
 2 files changed, 11 insertions(+)

diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig
index 240b15bc52cb..1a2d7c883b50 100644
--- a/drivers/usb/dwc3/Kconfig
+++ b/drivers/usb/dwc3/Kconfig
@@ -132,6 +132,7 @@ config USB_DWC3_QCOM
 	depends on ARCH_QCOM || COMPILE_TEST
 	depends on EXTCON || !EXTCON
 	depends on OF
+	depends on USB_QCOM_EUD || !USB_QCOM_EUD
 	default USB_DWC3
 	help
 	  Some Qualcomm SoCs use DesignWare Core IP for USB2/3
diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
index 9ac75547820d..b51fd97521df 100644
--- a/drivers/usb/dwc3/dwc3-qcom.c
+++ b/drivers/usb/dwc3/dwc3-qcom.c
@@ -9,6 +9,7 @@
 #include <linux/clk.h>
 #include <linux/irq.h>
 #include <linux/of_clk.h>
+#include <linux/of_graph.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/interconnect.h>
@@ -19,6 +20,7 @@
 #include <linux/iopoll.h>
 #include <linux/usb/hcd.h>
 #include <linux/usb.h>
+#include <linux/usb/qcom_eud.h>
 #include "core.h"
 #include "glue.h"
 
@@ -561,6 +563,7 @@ static int dwc3_qcom_setup_irq(struct dwc3_qcom *qcom, struct platform_device *p
 static void dwc3_qcom_set_role_notifier(struct dwc3 *dwc, enum usb_role next_role)
 {
 	struct dwc3_qcom *qcom = to_dwc3_qcom(dwc);
+	struct device_node *eud_node;
 
 	if (qcom->current_role == next_role)
 		return;
@@ -570,6 +573,13 @@ static void dwc3_qcom_set_role_notifier(struct dwc3 *dwc, enum usb_role next_rol
 		return;
 	}
 
+	/* Notify EUD of role change */
+	eud_node = of_graph_get_remote_node(qcom->dev->of_node, 0, -1);
+	if (eud_node) {
+		qcom_eud_usb_role_notify(eud_node, dwc->usb2_generic_phy[0], next_role);
+		of_node_put(eud_node);
+	}
+
 	if (qcom->current_role == USB_ROLE_DEVICE)
 		dwc3_qcom_vbus_override_enable(qcom, false);
 	else if (qcom->current_role != USB_ROLE_DEVICE)
-- 
2.34.1