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Commit ffd3326b authored by Andrew Victor's avatar Andrew Victor Committed by Greg Kroah-Hartman
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USB: at91 udc, support at91sam926x addresses 



This is an update to the AT91 USB Device (Gadget) driver.

The base I/O address provided in the platform_device resources is now
ioremap()'ed instead of using a statically mapped memory area.  This
helps portability to the newer AT91sam926x processors.

The major change is that we now have to pass a 'struct at91_udc'
parameter to at91_udp_read() and at91_udp_write().

Signed-off-by: default avatarAndrew Victor <andrew@sanpeople.com>
Signed-off-by: default avatarDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 5151d040

drivers/usb/gadget/at91_udc.c

+83 −86
Original line number Diff line number Diff line
@@ -43,12 +43,12 @@ 
#include <linux/usb_gadget.h>



#include <asm/byteorder.h>

#include <asm/hardware.h>

#include <asm/io.h>

#include <asm/irq.h>

#include <asm/system.h>

#include <asm/mach-types.h>



#include <asm/arch/hardware.h>

#include <asm/arch/gpio.h>

#include <asm/arch/board.h>
@@ -78,27 +78,11 @@ 
static const char driver_name [] = "at91_udc";

static const char ep0name[] = "ep0";



/*-------------------------------------------------------------------------*/



/*

 * Read from a UDP register.

 */

static inline unsigned long at91_udp_read(unsigned int reg)

{

	void __iomem *udp_base = (void __iomem *)AT91_VA_BASE_UDP;



	return __raw_readl(udp_base + reg);

}



/*

 * Write to a UDP register.

 */

static inline void at91_udp_write(unsigned int reg, unsigned long value)

{

	void __iomem *udp_base = (void __iomem *)AT91_VA_BASE_UDP;



	__raw_writel(value, udp_base + reg);

}

#define at91_udp_read(dev, reg) \

	__raw_readl((dev)->udp_baseaddr + (reg))

#define at91_udp_write(dev, reg, val) \

	__raw_writel((val), (dev)->udp_baseaddr + (reg))



/*-------------------------------------------------------------------------*/
@@ -210,13 +194,13 @@ static int proc_udc_show(struct seq_file *s, void *unused) 
		return 0;

	}



	tmp = at91_udp_read(AT91_UDP_FRM_NUM);

	tmp = at91_udp_read(udc, AT91_UDP_FRM_NUM);

	seq_printf(s, "frame %05x:%s%s frame=%d\n", tmp,

		(tmp & AT91_UDP_FRM_OK) ? " ok" : "",

		(tmp & AT91_UDP_FRM_ERR) ? " err" : "",

		(tmp & AT91_UDP_NUM));



	tmp = at91_udp_read(AT91_UDP_GLB_STAT);

	tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT);

	seq_printf(s, "glbstate %02x:%s" FOURBITS "\n", tmp,

		(tmp & AT91_UDP_RMWUPE) ? " rmwupe" : "",

		(tmp & AT91_UDP_RSMINPR) ? " rsminpr" : "",
@@ -224,13 +208,13 @@ static int proc_udc_show(struct seq_file *s, void *unused) 
		(tmp & AT91_UDP_CONFG) ? " confg" : "",

		(tmp & AT91_UDP_FADDEN) ? " fadden" : "");



	tmp = at91_udp_read(AT91_UDP_FADDR);

	tmp = at91_udp_read(udc, AT91_UDP_FADDR);

	seq_printf(s, "faddr   %03x:%s fadd=%d\n", tmp,

		(tmp & AT91_UDP_FEN) ? " fen" : "",

		(tmp & AT91_UDP_FADD));



	proc_irq_show(s, "imr   ", at91_udp_read(AT91_UDP_IMR));

	proc_irq_show(s, "isr   ", at91_udp_read(AT91_UDP_ISR));

	proc_irq_show(s, "imr   ", at91_udp_read(udc, AT91_UDP_IMR));

	proc_irq_show(s, "isr   ", at91_udp_read(udc, AT91_UDP_ISR));



	if (udc->enabled && udc->vbus) {

		proc_ep_show(s, &udc->ep[0]);
@@ -286,6 +270,7 @@ static inline void remove_debug_file(struct at91_udc *udc) {} 
static void done(struct at91_ep *ep, struct at91_request *req, int status)

{

	unsigned	stopped = ep->stopped;

	struct at91_udc	*udc = ep->udc;



	list_del_init(&req->queue);

	if (req->req.status == -EINPROGRESS)
@@ -301,7 +286,7 @@ static void done(struct at91_ep *ep, struct at91_request *req, int status) 


	/* ep0 is always ready; other endpoints need a non-empty queue */

	if (list_empty(&ep->queue) && ep->int_mask != (1 << 0))

		at91_udp_write(AT91_UDP_IDR, ep->int_mask);

		at91_udp_write(udc, AT91_UDP_IDR, ep->int_mask);

}



/*-------------------------------------------------------------------------*/
@@ -554,8 +539,8 @@ static int at91_ep_enable(struct usb_ep *_ep, 
	 * reset/init endpoint fifo.  NOTE:  leaves fifo_bank alone,

	 * since endpoint resets don't reset hw pingpong state.

	 */

	at91_udp_write(AT91_UDP_RST_EP, ep->int_mask);

	at91_udp_write(AT91_UDP_RST_EP, 0);

	at91_udp_write(dev, AT91_UDP_RST_EP, ep->int_mask);

	at91_udp_write(dev, AT91_UDP_RST_EP, 0);



	local_irq_restore(flags);

	return 0;
@@ -564,6 +549,7 @@ static int at91_ep_enable(struct usb_ep *_ep, 
static int at91_ep_disable (struct usb_ep * _ep)

{

	struct at91_ep	*ep = container_of(_ep, struct at91_ep, ep);

	struct at91_udc	*udc = ep->udc;

	unsigned long	flags;



	if (ep == &ep->udc->ep[0])
@@ -579,8 +565,8 @@ static int at91_ep_disable (struct usb_ep * _ep) 


	/* reset fifos and endpoint */

	if (ep->udc->clocked) {

		at91_udp_write(AT91_UDP_RST_EP, ep->int_mask);

		at91_udp_write(AT91_UDP_RST_EP, 0);

		at91_udp_write(udc, AT91_UDP_RST_EP, ep->int_mask);

		at91_udp_write(udc, AT91_UDP_RST_EP, 0);

		__raw_writel(0, ep->creg);

	}
@@ -695,10 +681,10 @@ static int at91_ep_queue(struct usb_ep *_ep, 
			 * reconfigures the endpoints.

			 */

			if (dev->wait_for_config_ack) {

				tmp = at91_udp_read(AT91_UDP_GLB_STAT);

				tmp = at91_udp_read(dev, AT91_UDP_GLB_STAT);

				tmp ^= AT91_UDP_CONFG;

				VDBG("toggle config\n");

				at91_udp_write(AT91_UDP_GLB_STAT, tmp);

				at91_udp_write(dev, AT91_UDP_GLB_STAT, tmp);

			}

			if (req->req.length == 0) {

ep0_in_status:
@@ -727,7 +713,7 @@ static int at91_ep_queue(struct usb_ep *_ep, 


	if (req && !status) {

		list_add_tail (&req->queue, &ep->queue);

		at91_udp_write(AT91_UDP_IER, ep->int_mask);

		at91_udp_write(dev, AT91_UDP_IER, ep->int_mask);

	}

done:

	local_irq_restore(flags);
@@ -758,6 +744,7 @@ static int at91_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) 
static int at91_ep_set_halt(struct usb_ep *_ep, int value)

{

	struct at91_ep	*ep = container_of(_ep, struct at91_ep, ep);

	struct at91_udc	*udc = ep->udc;

	u32 __iomem	*creg;

	u32		csr;

	unsigned long	flags;
@@ -785,8 +772,8 @@ static int at91_ep_set_halt(struct usb_ep *_ep, int value) 
			csr |= AT91_UDP_FORCESTALL;

			VDBG("halt %s\n", ep->ep.name);

		} else {

			at91_udp_write(AT91_UDP_RST_EP, ep->int_mask);

			at91_udp_write(AT91_UDP_RST_EP, 0);

			at91_udp_write(udc, AT91_UDP_RST_EP, ep->int_mask);

			at91_udp_write(udc, AT91_UDP_RST_EP, 0);

			csr &= ~AT91_UDP_FORCESTALL;

		}

		__raw_writel(csr, creg);
@@ -813,9 +800,11 @@ static struct usb_ep_ops at91_ep_ops = { 


static int at91_get_frame(struct usb_gadget *gadget)

{

	struct at91_udc *udc = to_udc(gadget);



	if (!to_udc(gadget)->clocked)

		return -EINVAL;

	return at91_udp_read(AT91_UDP_FRM_NUM) & AT91_UDP_NUM;

	return at91_udp_read(udc, AT91_UDP_FRM_NUM) & AT91_UDP_NUM;

}



static int at91_wakeup(struct usb_gadget *gadget)
@@ -833,11 +822,11 @@ static int at91_wakeup(struct usb_gadget *gadget) 


	/* NOTE:  some "early versions" handle ESR differently ... */



	glbstate = at91_udp_read(AT91_UDP_GLB_STAT);

	glbstate = at91_udp_read(udc, AT91_UDP_GLB_STAT);

	if (!(glbstate & AT91_UDP_ESR))

		goto done;

	glbstate |= AT91_UDP_ESR;

	at91_udp_write(AT91_UDP_GLB_STAT, glbstate);

	at91_udp_write(udc, AT91_UDP_GLB_STAT, glbstate);



done:

	local_irq_restore(flags);
@@ -861,6 +850,7 @@ static void udc_reinit(struct at91_udc *udc) 
		ep->stopped = 0;

		ep->fifo_bank = 0;

		ep->ep.maxpacket = ep->maxpacket;

		ep->creg = (void __iomem *) udc->udp_baseaddr + AT91_UDP_CSR(i);

		// initialiser une queue par endpoint

		INIT_LIST_HEAD(&ep->queue);

	}
@@ -915,13 +905,14 @@ static void pullup(struct at91_udc *udc, int is_on) 
	if (!udc->enabled || !udc->vbus)

		is_on = 0;

	DBG("%sactive\n", is_on ? "" : "in");



	if (is_on) {

		clk_on(udc);

		at91_udp_write(AT91_UDP_TXVC, 0);

		at91_udp_write(udc, AT91_UDP_TXVC, 0);

		at91_set_gpio_value(udc->board.pullup_pin, 1);

	} else {

		stop_activity(udc);

		at91_udp_write(AT91_UDP_TXVC, AT91_UDP_TXVC_TXVDIS);

		at91_udp_write(udc, AT91_UDP_TXVC, AT91_UDP_TXVC_TXVDIS);

		at91_set_gpio_value(udc->board.pullup_pin, 0);

		clk_off(udc);

	}
@@ -1086,7 +1077,7 @@ static void handle_setup(struct at91_udc *udc, struct at91_ep *ep, u32 csr) 


	case ((USB_TYPE_STANDARD|USB_RECIP_DEVICE) << 8)

			| USB_REQ_SET_CONFIGURATION:

		tmp = at91_udp_read(AT91_UDP_GLB_STAT) & AT91_UDP_CONFG;

		tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT) & AT91_UDP_CONFG;

		if (pkt.r.wValue)

			udc->wait_for_config_ack = (tmp == 0);

		else
@@ -1103,7 +1094,7 @@ static void handle_setup(struct at91_udc *udc, struct at91_ep *ep, u32 csr) 
	case ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE) << 8)

			| USB_REQ_GET_STATUS:

		tmp = (udc->selfpowered << USB_DEVICE_SELF_POWERED);

		if (at91_udp_read(AT91_UDP_GLB_STAT) & AT91_UDP_ESR)

		if (at91_udp_read(udc, AT91_UDP_GLB_STAT) & AT91_UDP_ESR)

			tmp |= (1 << USB_DEVICE_REMOTE_WAKEUP);

		PACKET("get device status\n");

		__raw_writeb(tmp, dreg);
@@ -1114,17 +1105,17 @@ static void handle_setup(struct at91_udc *udc, struct at91_ep *ep, u32 csr) 
			| USB_REQ_SET_FEATURE:

		if (w_value != USB_DEVICE_REMOTE_WAKEUP)

			goto stall;

		tmp = at91_udp_read(AT91_UDP_GLB_STAT);

		tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT);

		tmp |= AT91_UDP_ESR;

		at91_udp_write(AT91_UDP_GLB_STAT, tmp);

		at91_udp_write(udc, AT91_UDP_GLB_STAT, tmp);

		goto succeed;

	case ((USB_TYPE_STANDARD|USB_RECIP_DEVICE) << 8)

			| USB_REQ_CLEAR_FEATURE:

		if (w_value != USB_DEVICE_REMOTE_WAKEUP)

			goto stall;

		tmp = at91_udp_read(AT91_UDP_GLB_STAT);

		tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT);

		tmp &= ~AT91_UDP_ESR;

		at91_udp_write(AT91_UDP_GLB_STAT, tmp);

		at91_udp_write(udc, AT91_UDP_GLB_STAT, tmp);

		goto succeed;



	/*
@@ -1206,8 +1197,8 @@ static void handle_setup(struct at91_udc *udc, struct at91_ep *ep, u32 csr) 
		} else if (ep->is_in)

			goto stall;



		at91_udp_write(AT91_UDP_RST_EP, ep->int_mask);

		at91_udp_write(AT91_UDP_RST_EP, 0);

		at91_udp_write(udc, AT91_UDP_RST_EP, ep->int_mask);

		at91_udp_write(udc, AT91_UDP_RST_EP, 0);

		tmp = __raw_readl(ep->creg);

		tmp |= CLR_FX;

		tmp &= ~(SET_FX | AT91_UDP_FORCESTALL);
@@ -1300,13 +1291,13 @@ static void handle_ep0(struct at91_udc *udc) 
			if (udc->wait_for_addr_ack) {

				u32	tmp;



				at91_udp_write(AT91_UDP_FADDR,

				at91_udp_write(udc, AT91_UDP_FADDR,

						AT91_UDP_FEN | udc->addr);

				tmp = at91_udp_read(AT91_UDP_GLB_STAT);

				tmp = at91_udp_read(udc, AT91_UDP_GLB_STAT);

				tmp &= ~AT91_UDP_FADDEN;

				if (udc->addr)

					tmp |= AT91_UDP_FADDEN;

				at91_udp_write(AT91_UDP_GLB_STAT, tmp);

				at91_udp_write(udc, AT91_UDP_GLB_STAT, tmp);



				udc->wait_for_addr_ack = 0;

				VDBG("address %d\n", udc->addr);
@@ -1374,28 +1365,28 @@ static irqreturn_t at91_udc_irq (int irq, void *_udc) 
	while (rescans--) {

		u32 status;



		status = at91_udp_read(AT91_UDP_ISR)

			& at91_udp_read(AT91_UDP_IMR);

		status = at91_udp_read(udc, AT91_UDP_ISR)

			& at91_udp_read(udc, AT91_UDP_IMR);

		if (!status)

			break;



		/* USB reset irq:  not maskable */

		if (status & AT91_UDP_ENDBUSRES) {

			at91_udp_write(AT91_UDP_IDR, ~MINIMUS_INTERRUPTUS);

			at91_udp_write(AT91_UDP_IER, MINIMUS_INTERRUPTUS);

			at91_udp_write(udc, AT91_UDP_IDR, ~MINIMUS_INTERRUPTUS);

			at91_udp_write(udc, AT91_UDP_IER, MINIMUS_INTERRUPTUS);

			/* Atmel code clears this irq twice */

			at91_udp_write(AT91_UDP_ICR, AT91_UDP_ENDBUSRES);

			at91_udp_write(AT91_UDP_ICR, AT91_UDP_ENDBUSRES);

			at91_udp_write(udc, AT91_UDP_ICR, AT91_UDP_ENDBUSRES);

			at91_udp_write(udc, AT91_UDP_ICR, AT91_UDP_ENDBUSRES);

			VDBG("end bus reset\n");

			udc->addr = 0;

			stop_activity(udc);



			/* enable ep0 */

			at91_udp_write(AT91_UDP_CSR(0),

			at91_udp_write(udc, AT91_UDP_CSR(0),

					AT91_UDP_EPEDS | AT91_UDP_EPTYPE_CTRL);

			udc->gadget.speed = USB_SPEED_FULL;

			udc->suspended = 0;

			at91_udp_write(AT91_UDP_IER, AT91_UDP_EP(0));

			at91_udp_write(udc, AT91_UDP_IER, AT91_UDP_EP(0));



			/*

			 * NOTE:  this driver keeps clocks off unless the
@@ -1406,9 +1397,9 @@ static irqreturn_t at91_udc_irq (int irq, void *_udc) 


		/* host initiated suspend (3+ms bus idle) */

		} else if (status & AT91_UDP_RXSUSP) {

			at91_udp_write(AT91_UDP_IDR, AT91_UDP_RXSUSP);

			at91_udp_write(AT91_UDP_IER, AT91_UDP_RXRSM);

			at91_udp_write(AT91_UDP_ICR, AT91_UDP_RXSUSP);

			at91_udp_write(udc, AT91_UDP_IDR, AT91_UDP_RXSUSP);

			at91_udp_write(udc, AT91_UDP_IER, AT91_UDP_RXRSM);

			at91_udp_write(udc, AT91_UDP_ICR, AT91_UDP_RXSUSP);

			// VDBG("bus suspend\n");

			if (udc->suspended)

				continue;
@@ -1425,9 +1416,9 @@ static irqreturn_t at91_udc_irq (int irq, void *_udc) 


		/* host initiated resume */

		} else if (status & AT91_UDP_RXRSM) {

			at91_udp_write(AT91_UDP_IDR, AT91_UDP_RXRSM);

			at91_udp_write(AT91_UDP_IER, AT91_UDP_RXSUSP);

			at91_udp_write(AT91_UDP_ICR, AT91_UDP_RXRSM);

			at91_udp_write(udc, AT91_UDP_IDR, AT91_UDP_RXRSM);

			at91_udp_write(udc, AT91_UDP_IER, AT91_UDP_RXSUSP);

			at91_udp_write(udc, AT91_UDP_ICR, AT91_UDP_RXRSM);

			// VDBG("bus resume\n");

			if (!udc->suspended)

				continue;
@@ -1485,8 +1476,6 @@ static struct at91_udc controller = { 
		},

		.udc		= &controller,

		.maxpacket	= 8,

		.creg		= (void __iomem *)(AT91_VA_BASE_UDP

					+ AT91_UDP_CSR(0)),

		.int_mask	= 1 << 0,

	},

	.ep[1] = {
@@ -1497,8 +1486,6 @@ static struct at91_udc controller = { 
		.udc		= &controller,

		.is_pingpong	= 1,

		.maxpacket	= 64,

		.creg		= (void __iomem *)(AT91_VA_BASE_UDP

					+ AT91_UDP_CSR(1)),

		.int_mask	= 1 << 1,

	},

	.ep[2] = {
@@ -1509,8 +1496,6 @@ static struct at91_udc controller = { 
		.udc		= &controller,

		.is_pingpong	= 1,

		.maxpacket	= 64,

		.creg		= (void __iomem *)(AT91_VA_BASE_UDP

					+ AT91_UDP_CSR(2)),

		.int_mask	= 1 << 2,

	},

	.ep[3] = {
@@ -1521,8 +1506,6 @@ static struct at91_udc controller = { 
		},

		.udc		= &controller,

		.maxpacket	= 8,

		.creg		= (void __iomem *)(AT91_VA_BASE_UDP

					+ AT91_UDP_CSR(3)),

		.int_mask	= 1 << 3,

	},

	.ep[4] = {
@@ -1533,8 +1516,6 @@ static struct at91_udc controller = { 
		.udc		= &controller,

		.is_pingpong	= 1,

		.maxpacket	= 256,

		.creg		= (void __iomem *)(AT91_VA_BASE_UDP

					+ AT91_UDP_CSR(4)),

		.int_mask	= 1 << 4,

	},

	.ep[5] = {
@@ -1545,8 +1526,6 @@ static struct at91_udc controller = { 
		.udc		= &controller,

		.is_pingpong	= 1,

		.maxpacket	= 256,

		.creg		= (void __iomem *)(AT91_VA_BASE_UDP

					+ AT91_UDP_CSR(5)),

		.int_mask	= 1 << 5,

	},

	/* ep6 and ep7 are also reserved (custom silicon might use them) */
@@ -1615,7 +1594,7 @@ int usb_gadget_unregister_driver (struct usb_gadget_driver *driver) 


	local_irq_disable();

	udc->enabled = 0;

	at91_udp_write(AT91_UDP_IDR, ~0);

	at91_udp_write(udc, AT91_UDP_IDR, ~0);

	pullup(udc, 0);

	local_irq_enable();
@@ -1640,6 +1619,7 @@ static int __devinit at91udc_probe(struct platform_device *pdev) 
	struct device	*dev = &pdev->dev;

	struct at91_udc	*udc;

	int		retval;

	struct resource	*res;



	if (!dev->platform_data) {

		/* small (so we copy it) but critical! */
@@ -1657,7 +1637,13 @@ static int __devinit at91udc_probe(struct platform_device *pdev) 
		return -ENODEV;

	}



	if (!request_mem_region(AT91RM9200_BASE_UDP, SZ_16K, driver_name)) {

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	if (!res)

		return -ENXIO;



	if (!request_mem_region(res->start,

			res->end - res->start + 1,

			driver_name)) {

		DBG("someone's using UDC memory\n");

		return -EBUSY;

	}
@@ -1667,9 +1653,16 @@ static int __devinit at91udc_probe(struct platform_device *pdev) 
	udc->gadget.dev.parent = dev;

	udc->board = *(struct at91_udc_data *) dev->platform_data;

	udc->pdev = pdev;

	udc_reinit(udc);

	udc->enabled = 0;



	udc->udp_baseaddr = ioremap(res->start, res->end - res->start + 1);

	if (!udc->udp_baseaddr) {

		release_mem_region(res->start, res->end - res->start + 1);

		return -ENOMEM;

	}



	udc_reinit(udc);



	/* get interface and function clocks */

	udc->iclk = clk_get(dev, "udc_clk");

	udc->fclk = clk_get(dev, "udpck");
@@ -1684,8 +1677,8 @@ static int __devinit at91udc_probe(struct platform_device *pdev) 


	/* don't do anything until we have both gadget driver and VBUS */

	clk_enable(udc->iclk);

	at91_udp_write(AT91_UDP_TXVC, AT91_UDP_TXVC_TXVDIS);

	at91_udp_write(AT91_UDP_IDR, 0xffffffff);

	at91_udp_write(udc, AT91_UDP_TXVC, AT91_UDP_TXVC_TXVDIS);

	at91_udp_write(udc, AT91_UDP_IDR, 0xffffffff);

	clk_disable(udc->iclk);



	/* request UDC and maybe VBUS irqs */
@@ -1719,7 +1712,7 @@ static int __devinit at91udc_probe(struct platform_device *pdev) 
fail1:

	device_unregister(&udc->gadget.dev);

fail0:

	release_mem_region(AT91RM9200_BASE_UDP, SZ_16K);

	release_mem_region(res->start, res->end - res->start + 1);

	DBG("%s probe failed, %d\n", driver_name, retval);

	return retval;

}
@@ -1727,6 +1720,7 @@ static int __devinit at91udc_probe(struct platform_device *pdev) 
static int __devexit at91udc_remove(struct platform_device *pdev)

{

	struct at91_udc *udc = platform_get_drvdata(pdev);

	struct resource *res;



	DBG("remove\n");
@@ -1741,7 +1735,10 @@ static int __devexit at91udc_remove(struct platform_device *pdev) 
		free_irq(udc->board.vbus_pin, udc);

	free_irq(udc->udp_irq, udc);

	device_unregister(&udc->gadget.dev);

	release_mem_region(AT91RM9200_BASE_UDP, SZ_16K);



	iounmap(udc->udp_baseaddr);

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	release_mem_region(res->start, res->end - res->start + 1);



	clk_put(udc->iclk);

	clk_put(udc->fclk);

drivers/usb/gadget/at91_udc.h

+1 −0
Original line number Diff line number Diff line
@@ -141,6 +141,7 @@ struct at91_udc { 
	struct clk			*iclk, *fclk;

	struct platform_device		*pdev;

	struct proc_dir_entry		*pde;

	void __iomem			*udp_baseaddr;

	int				udp_irq;

};