usb: gadget: at91_udc: add at91_udc into U-Boot

add U-Boot specific changes to the at91_udc linux driver,
so it works with U-Boot.

Signed-off-by: Heiko Schocher <hs@denx.de>

drivers/usb/gadget/Makefile

@@ -10,6 +10,7 @@ obj-$(CONFIG_USB_ETHER) += epautoconf.o config.o usbstring.o
 
 # new USB gadget layer dependencies
 ifdef CONFIG_USB_GADGET
+obj-$(CONFIG_USB_GADGET_AT91) += at91_udc.o
 obj-$(CONFIG_USB_GADGET_ATMEL_USBA) += atmel_usba_udc.o
 obj-$(CONFIG_USB_GADGET_BCM_UDC_OTG_PHY) += bcm_udc_otg_phy.o
 obj-$(CONFIG_USB_GADGET_S3C_UDC_OTG) += s3c_udc_otg.o

drivers/usb/gadget/at91_udc.h

@@ -128,18 +128,14 @@ struct at91_udc {
 	unsigned			req_pending:1;
 	unsigned			wait_for_addr_ack:1;
 	unsigned			wait_for_config_ack:1;
+	unsigned			selfpowered:1;
 	unsigned			active_suspend:1;
 	u8				addr;
 	struct at91_udc_data		board;
-	struct clk			*iclk, *fclk;
-	struct platform_device		*pdev;
-	struct proc_dir_entry		*pde;
 	void __iomem			*udp_baseaddr;
 	int				udp_irq;
 	spinlock_t			lock;
-	struct timer_list		vbus_timer;
-	struct work_struct		vbus_timer_work;
-	struct regmap			*matrix;
+	struct at91_matrix		*matrix;
 };
 
 static inline struct at91_udc *to_udc(struct usb_gadget *g)
@@ -166,10 +162,10 @@ struct at91_request {
 #    define PACKET(stuff...)	do{}while(0)
 #endif
 
-#define ERR(stuff...)		pr_err("udc: " stuff)
-#define WARNING(stuff...)	pr_warning("udc: " stuff)
-#define INFO(stuff...)		pr_info("udc: " stuff)
-#define DBG(stuff...)		pr_debug("udc: " stuff)
+#define ERR(stuff...)		debug("udc: " stuff)
+#define WARNING(stuff...)	debug("udc: " stuff)
+#define INFO(stuff...)		debug("udc: " stuff)
+#define DBG(stuff...)		debug("udc: " stuff)
 
 #endif
 

include/linux/usb/at91_udc.h

+/*
+ * Platform data definitions for Atmel USBA gadget driver
+ * pieces copied from linux:include/linux/platform_data/atmel.h
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+#ifndef __LINUX_USB_AT91_UDC_H__
+#define __LINUX_USB_AT91_UDC_H__
+
+struct at91_udc_data {
+	int	vbus_pin;		/* high == host powering us */
+	u8	vbus_active_low;	/* vbus polarity */
+	u8	vbus_polled;		/* Use polling, not interrupt */
+	int	pullup_pin;		/* active == D+ pulled up */
+	u8	pullup_active_low;	/* true == pullup_pin is active low */
+	unsigned long	baseaddr;
+};
+
+int at91_udc_probe(struct at91_udc_data *pdata);
+#endif /* __LINUX_USB_AT91_UDC_H__ */