[PATCH v2 1/5] usb: dwc3: add platform data to dwc3 core device to pass data

[Li Jun <jun.li@xxxxxxx>]

In case dwc3 has SoC specific customizations, dwc3 glue driver can base on
compatible string and pass it via platform data to dwc3 core driver; and
pass xhci private data further to xhci-plat like quirks.

Signed-off-by: Li Jun <jun.li@xxxxxxx>
---
 drivers/usb/dwc3/core.h | 5 +++++
 drivers/usb/dwc3/host.c | 9 +++++++++
 2 files changed, 14 insertions(+)

diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 0b8ea8c..3146697 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -29,6 +29,7 @@
 #include <linux/ulpi/interface.h>
 
 #include <linux/phy/phy.h>
+#include "../host/xhci-plat.h"
 
 #define DWC3_MSG_MAX	500
 
@@ -924,6 +925,10 @@ struct dwc3_scratchpad_array {
 	__le64	dma_adr[DWC3_MAX_HIBER_SCRATCHBUFS];
 };
 
+struct dwc3_platform_data {
+	struct xhci_plat_priv *xhci_priv;
+};
+
 /**
  * struct dwc3 - representation of our controller
  * @drd_work: workqueue used for role swapping
diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c
index bef1c1a..4f8514a 100644
--- a/drivers/usb/dwc3/host.c
+++ b/drivers/usb/dwc3/host.c
@@ -46,6 +46,7 @@ int dwc3_host_init(struct dwc3 *dwc)
 {
 	struct property_entry	props[4];
 	struct platform_device	*xhci;
+	struct dwc3_platform_data *dwc3_pdata;
 	int			ret, irq;
 	struct resource		*res;
 	struct platform_device	*dwc3_pdev = to_platform_device(dwc->dev);
@@ -115,6 +116,14 @@ int dwc3_host_init(struct dwc3 *dwc)
 		}
 	}
 
+	dwc3_pdata = (struct dwc3_platform_data *)dev_get_platdata(dwc->dev);
+	if (dwc3_pdata && dwc3_pdata->xhci_priv) {
+		ret = platform_device_add_data(xhci, dwc3_pdata->xhci_priv,
+					       sizeof(struct xhci_plat_priv));
+		if (ret)
+			goto err;
+	}
+
 	ret = platform_device_add(xhci);
 	if (ret) {
 		dev_err(dwc->dev, "failed to register xHCI device\n");
-- 
2.7.4