[PATCH v4 04/10] usb: dwc3-generic: Export glue structures and functions

[Kunihiko Hayashi]

In order to allow external SoC-dependent glue drivers to use dwc3-generic
functions, push the glue structures and export the functions to a header
file.

The exported structures and functions are:

- struct dwc3_glue_data
- struct dwc3_glue_ops
- dwc3_glue_bind()
- dwc3_glue_probe()
- dwc3_glue_remove()

The SoC-dependent glue drivers can only define their own wrapper driver
and specify these functions. The drivers can also add their own compatible
strings and configure functions.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko at socionext.com>
Reviewed-by: Marek Vasut <marex at denx.de>
---
 drivers/usb/dwc3/dwc3-generic.c | 18 ++++--------------
 drivers/usb/dwc3/dwc3-generic.h | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+), 14 deletions(-)
 create mode 100644 drivers/usb/dwc3/dwc3-generic.h

diff --git a/drivers/usb/dwc3/dwc3-generic.c b/drivers/usb/dwc3/dwc3-generic.c
index 8fa56e1ac1..4576390ec7 100644
--- a/drivers/usb/dwc3/dwc3-generic.c
+++ b/drivers/usb/dwc3/dwc3-generic.c
@@ -28,11 +28,7 @@
 #include <usb/xhci.h>
 #include <asm/gpio.h>
 
-struct dwc3_glue_data {
-	struct clk_bulk		clks;
-	struct reset_ctl_bulk	resets;
-	fdt_addr_t regs;
-};
+#include "dwc3-generic.h"
 
 struct dwc3_generic_plat {
 	fdt_addr_t base;
@@ -275,12 +271,6 @@ U_BOOT_DRIVER(dwc3_generic_host) = {
 };
 #endif
 
-struct dwc3_glue_ops {
-	int (*glue_get_ctrl_dev)(struct udevice *parent, ofnode *node);
-	void (*glue_configure)(struct udevice *dev, int index,
-			       enum usb_dr_mode mode);
-};
-
 void dwc3_imx8mp_glue_configure(struct udevice *dev, int index,
 				enum usb_dr_mode mode)
 {
@@ -464,7 +454,7 @@ static int dwc3_glue_bind_common(struct udevice *parent, ofnode node)
 	return 0;
 }
 
-static int dwc3_glue_bind(struct udevice *parent)
+int dwc3_glue_bind(struct udevice *parent)
 {
 	struct dwc3_glue_ops *ops = (struct dwc3_glue_ops *)dev_get_driver_data(parent);
 	ofnode node;
@@ -531,7 +521,7 @@ static int dwc3_glue_clk_init(struct udevice *dev,
 	return 0;
 }
 
-static int dwc3_glue_probe(struct udevice *dev)
+int dwc3_glue_probe(struct udevice *dev)
 {
 	struct dwc3_glue_ops *ops = (struct dwc3_glue_ops *)dev_get_driver_data(dev);
 	struct dwc3_glue_data *glue = dev_get_plat(dev);
@@ -597,7 +587,7 @@ static int dwc3_glue_probe(struct udevice *dev)
 	return 0;
 }
 
-static int dwc3_glue_remove(struct udevice *dev)
+int dwc3_glue_remove(struct udevice *dev)
 {
 	struct dwc3_glue_data *glue = dev_get_plat(dev);
 
diff --git a/drivers/usb/dwc3/dwc3-generic.h b/drivers/usb/dwc3/dwc3-generic.h
new file mode 100644
index 0000000000..824f678841
--- /dev/null
+++ b/drivers/usb/dwc3/dwc3-generic.h
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * dwc3-generic.h - Generic DWC3 Glue layer header
+ *
+ * Copyright (C) 2016 - 2018 Xilinx, Inc.
+ * Copyright (C) 2023 Socionext Inc.
+ */
+
+#ifndef __DRIVERS_USB_DWC3_GENERIC_H
+#define __DRIVERS_USB_DWC3_GENERIC_H
+
+#include <clk.h>
+#include <reset.h>
+#include <dwc3-uboot.h>
+
+struct dwc3_glue_data {
+	struct clk_bulk		clks;
+	struct reset_ctl_bulk	resets;
+	fdt_addr_t regs;
+};
+
+struct dwc3_glue_ops {
+	int (*glue_get_ctrl_dev)(struct udevice *parent, ofnode *node);
+	void (*glue_configure)(struct udevice *dev, int index,
+			       enum usb_dr_mode mode);
+};
+
+int dwc3_glue_bind(struct udevice *parent);
+int dwc3_glue_probe(struct udevice *dev);
+int dwc3_glue_remove(struct udevice *dev);
+
+#endif
-- 
2.25.1