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usb: Convert to devm_ioremap_resource()
[deliverable/linux.git] / drivers / usb / musb / omap2430.c
1 /*
2 * Copyright (C) 2005-2007 by Texas Instruments
3 * Some code has been taken from tusb6010.c
4 * Copyrights for that are attributable to:
5 * Copyright (C) 2006 Nokia Corporation
6 * Tony Lindgren <tony@atomide.com>
7 *
8 * This file is part of the Inventra Controller Driver for Linux.
9 *
10 * The Inventra Controller Driver for Linux is free software; you
11 * can redistribute it and/or modify it under the terms of the GNU
12 * General Public License version 2 as published by the Free Software
13 * Foundation.
14 *
15 * The Inventra Controller Driver for Linux is distributed in
16 * the hope that it will be useful, but WITHOUT ANY WARRANTY;
17 * without even the implied warranty of MERCHANTABILITY or
18 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
19 * License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with The Inventra Controller Driver for Linux ; if not,
23 * write to the Free Software Foundation, Inc., 59 Temple Place,
24 * Suite 330, Boston, MA 02111-1307 USA
25 *
26 */
27 #include <linux/module.h>
28 #include <linux/kernel.h>
29 #include <linux/sched.h>
30 #include <linux/init.h>
31 #include <linux/list.h>
32 #include <linux/io.h>
33 #include <linux/of.h>
34 #include <linux/platform_device.h>
35 #include <linux/dma-mapping.h>
36 #include <linux/pm_runtime.h>
37 #include <linux/err.h>
38 #include <linux/delay.h>
39 #include <linux/usb/musb-omap.h>
40
41 #include "musb_core.h"
42 #include "omap2430.h"
43
44 struct omap2430_glue {
45 struct device *dev;
46 struct platform_device *musb;
47 enum omap_musb_vbus_id_status status;
48 struct work_struct omap_musb_mailbox_work;
49 u32 __iomem *control_otghs;
50 };
51 #define glue_to_musb(g) platform_get_drvdata(g->musb)
52
53 struct omap2430_glue *_glue;
54
55 static struct timer_list musb_idle_timer;
56
57 /**
58 * omap4_usb_phy_mailbox - write to usb otg mailbox
59 * @glue: struct omap2430_glue *
60 * @val: the value to be written to the mailbox
61 *
62 * On detection of a device (ID pin is grounded), this API should be called
63 * to set AVALID, VBUSVALID and ID pin is grounded.
64 *
65 * When OMAP is connected to a host (OMAP in device mode), this API
66 * is called to set AVALID, VBUSVALID and ID pin in high impedance.
67 *
68 * XXX: This function will be removed once we have a seperate driver for
69 * control module
70 */
71 static void omap4_usb_phy_mailbox(struct omap2430_glue *glue, u32 val)
72 {
73 if (glue->control_otghs)
74 writel(val, glue->control_otghs);
75 }
76
77 static void musb_do_idle(unsigned long _musb)
78 {
79 struct musb *musb = (void *)_musb;
80 unsigned long flags;
81 u8 power;
82 u8 devctl;
83
84 spin_lock_irqsave(&musb->lock, flags);
85
86 switch (musb->xceiv->state) {
87 case OTG_STATE_A_WAIT_BCON:
88
89 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
90 if (devctl & MUSB_DEVCTL_BDEVICE) {
91 musb->xceiv->state = OTG_STATE_B_IDLE;
92 MUSB_DEV_MODE(musb);
93 } else {
94 musb->xceiv->state = OTG_STATE_A_IDLE;
95 MUSB_HST_MODE(musb);
96 }
97 break;
98 case OTG_STATE_A_SUSPEND:
99 /* finish RESUME signaling? */
100 if (musb->port1_status & MUSB_PORT_STAT_RESUME) {
101 power = musb_readb(musb->mregs, MUSB_POWER);
102 power &= ~MUSB_POWER_RESUME;
103 dev_dbg(musb->controller, "root port resume stopped, power %02x\n", power);
104 musb_writeb(musb->mregs, MUSB_POWER, power);
105 musb->is_active = 1;
106 musb->port1_status &= ~(USB_PORT_STAT_SUSPEND
107 | MUSB_PORT_STAT_RESUME);
108 musb->port1_status |= USB_PORT_STAT_C_SUSPEND << 16;
109 usb_hcd_poll_rh_status(musb_to_hcd(musb));
110 /* NOTE: it might really be A_WAIT_BCON ... */
111 musb->xceiv->state = OTG_STATE_A_HOST;
112 }
113 break;
114 case OTG_STATE_A_HOST:
115 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
116 if (devctl & MUSB_DEVCTL_BDEVICE)
117 musb->xceiv->state = OTG_STATE_B_IDLE;
118 else
119 musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
120 default:
121 break;
122 }
123 spin_unlock_irqrestore(&musb->lock, flags);
124 }
125
126
127 static void omap2430_musb_try_idle(struct musb *musb, unsigned long timeout)
128 {
129 unsigned long default_timeout = jiffies + msecs_to_jiffies(3);
130 static unsigned long last_timer;
131
132 if (timeout == 0)
133 timeout = default_timeout;
134
135 /* Never idle if active, or when VBUS timeout is not set as host */
136 if (musb->is_active || ((musb->a_wait_bcon == 0)
137 && (musb->xceiv->state == OTG_STATE_A_WAIT_BCON))) {
138 dev_dbg(musb->controller, "%s active, deleting timer\n",
139 otg_state_string(musb->xceiv->state));
140 del_timer(&musb_idle_timer);
141 last_timer = jiffies;
142 return;
143 }
144
145 if (time_after(last_timer, timeout)) {
146 if (!timer_pending(&musb_idle_timer))
147 last_timer = timeout;
148 else {
149 dev_dbg(musb->controller, "Longer idle timer already pending, ignoring\n");
150 return;
151 }
152 }
153 last_timer = timeout;
154
155 dev_dbg(musb->controller, "%s inactive, for idle timer for %lu ms\n",
156 otg_state_string(musb->xceiv->state),
157 (unsigned long)jiffies_to_msecs(timeout - jiffies));
158 mod_timer(&musb_idle_timer, timeout);
159 }
160
161 static void omap2430_musb_set_vbus(struct musb *musb, int is_on)
162 {
163 struct usb_otg *otg = musb->xceiv->otg;
164 u8 devctl;
165 unsigned long timeout = jiffies + msecs_to_jiffies(1000);
166 /* HDRC controls CPEN, but beware current surges during device
167 * connect. They can trigger transient overcurrent conditions
168 * that must be ignored.
169 */
170
171 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
172
173 if (is_on) {
174 if (musb->xceiv->state == OTG_STATE_A_IDLE) {
175 int loops = 100;
176 /* start the session */
177 devctl |= MUSB_DEVCTL_SESSION;
178 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
179 /*
180 * Wait for the musb to set as A device to enable the
181 * VBUS
182 */
183 while (musb_readb(musb->mregs, MUSB_DEVCTL) & 0x80) {
184
185 mdelay(5);
186 cpu_relax();
187
188 if (time_after(jiffies, timeout)
189 || loops-- <= 0) {
190 dev_err(musb->controller,
191 "configured as A device timeout");
192 break;
193 }
194 }
195
196 if (otg->set_vbus)
197 otg_set_vbus(otg, 1);
198 } else {
199 musb->is_active = 1;
200 otg->default_a = 1;
201 musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
202 devctl |= MUSB_DEVCTL_SESSION;
203 MUSB_HST_MODE(musb);
204 }
205 } else {
206 musb->is_active = 0;
207
208 /* NOTE: we're skipping A_WAIT_VFALL -> A_IDLE and
209 * jumping right to B_IDLE...
210 */
211
212 otg->default_a = 0;
213 musb->xceiv->state = OTG_STATE_B_IDLE;
214 devctl &= ~MUSB_DEVCTL_SESSION;
215
216 MUSB_DEV_MODE(musb);
217 }
218 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
219
220 dev_dbg(musb->controller, "VBUS %s, devctl %02x "
221 /* otg %3x conf %08x prcm %08x */ "\n",
222 otg_state_string(musb->xceiv->state),
223 musb_readb(musb->mregs, MUSB_DEVCTL));
224 }
225
226 static int omap2430_musb_set_mode(struct musb *musb, u8 musb_mode)
227 {
228 u8 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
229
230 devctl |= MUSB_DEVCTL_SESSION;
231 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
232
233 return 0;
234 }
235
236 static inline void omap2430_low_level_exit(struct musb *musb)
237 {
238 u32 l;
239
240 /* in any role */
241 l = musb_readl(musb->mregs, OTG_FORCESTDBY);
242 l |= ENABLEFORCE; /* enable MSTANDBY */
243 musb_writel(musb->mregs, OTG_FORCESTDBY, l);
244 }
245
246 static inline void omap2430_low_level_init(struct musb *musb)
247 {
248 u32 l;
249
250 l = musb_readl(musb->mregs, OTG_FORCESTDBY);
251 l &= ~ENABLEFORCE; /* disable MSTANDBY */
252 musb_writel(musb->mregs, OTG_FORCESTDBY, l);
253 }
254
255 void omap_musb_mailbox(enum omap_musb_vbus_id_status status)
256 {
257 struct omap2430_glue *glue = _glue;
258 struct musb *musb = glue_to_musb(glue);
259
260 glue->status = status;
261 if (!musb) {
262 dev_err(glue->dev, "musb core is not yet ready\n");
263 return;
264 }
265
266 schedule_work(&glue->omap_musb_mailbox_work);
267 }
268 EXPORT_SYMBOL_GPL(omap_musb_mailbox);
269
270 static void omap_musb_set_mailbox(struct omap2430_glue *glue)
271 {
272 u32 val;
273 struct musb *musb = glue_to_musb(glue);
274 struct device *dev = musb->controller;
275 struct musb_hdrc_platform_data *pdata = dev->platform_data;
276 struct omap_musb_board_data *data = pdata->board_data;
277 struct usb_otg *otg = musb->xceiv->otg;
278
279 switch (glue->status) {
280 case OMAP_MUSB_ID_GROUND:
281 dev_dbg(dev, "ID GND\n");
282
283 otg->default_a = true;
284 musb->xceiv->state = OTG_STATE_A_IDLE;
285 musb->xceiv->last_event = USB_EVENT_ID;
286 if (musb->gadget_driver) {
287 pm_runtime_get_sync(dev);
288 val = AVALID | VBUSVALID;
289 omap4_usb_phy_mailbox(glue, val);
290 omap2430_musb_set_vbus(musb, 1);
291 }
292 break;
293
294 case OMAP_MUSB_VBUS_VALID:
295 dev_dbg(dev, "VBUS Connect\n");
296
297 otg->default_a = false;
298 musb->xceiv->state = OTG_STATE_B_IDLE;
299 musb->xceiv->last_event = USB_EVENT_VBUS;
300 if (musb->gadget_driver)
301 pm_runtime_get_sync(dev);
302 val = IDDIG | AVALID | VBUSVALID;
303 omap4_usb_phy_mailbox(glue, val);
304 break;
305
306 case OMAP_MUSB_ID_FLOAT:
307 case OMAP_MUSB_VBUS_OFF:
308 dev_dbg(dev, "VBUS Disconnect\n");
309
310 musb->xceiv->last_event = USB_EVENT_NONE;
311 if (musb->gadget_driver) {
312 pm_runtime_mark_last_busy(dev);
313 pm_runtime_put_autosuspend(dev);
314 }
315
316 if (data->interface_type == MUSB_INTERFACE_UTMI) {
317 if (musb->xceiv->otg->set_vbus)
318 otg_set_vbus(musb->xceiv->otg, 0);
319 }
320 val = SESSEND | IDDIG;
321 omap4_usb_phy_mailbox(glue, val);
322 break;
323 default:
324 dev_dbg(dev, "ID float\n");
325 }
326 }
327
328
329 static void omap_musb_mailbox_work(struct work_struct *mailbox_work)
330 {
331 struct omap2430_glue *glue = container_of(mailbox_work,
332 struct omap2430_glue, omap_musb_mailbox_work);
333 omap_musb_set_mailbox(glue);
334 }
335
336 static irqreturn_t omap2430_musb_interrupt(int irq, void *__hci)
337 {
338 unsigned long flags;
339 irqreturn_t retval = IRQ_NONE;
340 struct musb *musb = __hci;
341
342 spin_lock_irqsave(&musb->lock, flags);
343
344 musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
345 musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
346 musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);
347
348 if (musb->int_usb || musb->int_tx || musb->int_rx)
349 retval = musb_interrupt(musb);
350
351 spin_unlock_irqrestore(&musb->lock, flags);
352
353 return retval;
354 }
355
356 static int omap2430_musb_init(struct musb *musb)
357 {
358 u32 l;
359 int status = 0;
360 struct device *dev = musb->controller;
361 struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
362 struct musb_hdrc_platform_data *plat = dev->platform_data;
363 struct omap_musb_board_data *data = plat->board_data;
364
365 /* We require some kind of external transceiver, hooked
366 * up through ULPI. TWL4030-family PMICs include one,
367 * which needs a driver, drivers aren't always needed.
368 */
369 musb->xceiv = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
370 if (IS_ERR_OR_NULL(musb->xceiv)) {
371 pr_err("HS USB OTG: no transceiver configured\n");
372 return -ENODEV;
373 }
374
375 musb->isr = omap2430_musb_interrupt;
376
377 status = pm_runtime_get_sync(dev);
378 if (status < 0) {
379 dev_err(dev, "pm_runtime_get_sync FAILED %d\n", status);
380 goto err1;
381 }
382
383 l = musb_readl(musb->mregs, OTG_INTERFSEL);
384
385 if (data->interface_type == MUSB_INTERFACE_UTMI) {
386 /* OMAP4 uses Internal PHY GS70 which uses UTMI interface */
387 l &= ~ULPI_12PIN; /* Disable ULPI */
388 l |= UTMI_8BIT; /* Enable UTMI */
389 } else {
390 l |= ULPI_12PIN;
391 }
392
393 musb_writel(musb->mregs, OTG_INTERFSEL, l);
394
395 pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
396 "sysstatus 0x%x, intrfsel 0x%x, simenable 0x%x\n",
397 musb_readl(musb->mregs, OTG_REVISION),
398 musb_readl(musb->mregs, OTG_SYSCONFIG),
399 musb_readl(musb->mregs, OTG_SYSSTATUS),
400 musb_readl(musb->mregs, OTG_INTERFSEL),
401 musb_readl(musb->mregs, OTG_SIMENABLE));
402
403 setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
404
405 if (glue->status != OMAP_MUSB_UNKNOWN)
406 omap_musb_set_mailbox(glue);
407
408 pm_runtime_put_noidle(musb->controller);
409 return 0;
410
411 err1:
412 return status;
413 }
414
415 static void omap2430_musb_enable(struct musb *musb)
416 {
417 u8 devctl;
418 u32 val;
419 unsigned long timeout = jiffies + msecs_to_jiffies(1000);
420 struct device *dev = musb->controller;
421 struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
422 struct musb_hdrc_platform_data *pdata = dev->platform_data;
423 struct omap_musb_board_data *data = pdata->board_data;
424
425 switch (glue->status) {
426
427 case OMAP_MUSB_ID_GROUND:
428 val = AVALID | VBUSVALID;
429 omap4_usb_phy_mailbox(glue, val);
430 if (data->interface_type != MUSB_INTERFACE_UTMI)
431 break;
432 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
433 /* start the session */
434 devctl |= MUSB_DEVCTL_SESSION;
435 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
436 while (musb_readb(musb->mregs, MUSB_DEVCTL) &
437 MUSB_DEVCTL_BDEVICE) {
438 cpu_relax();
439
440 if (time_after(jiffies, timeout)) {
441 dev_err(dev, "configured as A device timeout");
442 break;
443 }
444 }
445 break;
446
447 case OMAP_MUSB_VBUS_VALID:
448 val = IDDIG | AVALID | VBUSVALID;
449 omap4_usb_phy_mailbox(glue, val);
450 break;
451
452 default:
453 break;
454 }
455 }
456
457 static void omap2430_musb_disable(struct musb *musb)
458 {
459 u32 val;
460 struct device *dev = musb->controller;
461 struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
462
463 if (glue->status != OMAP_MUSB_UNKNOWN) {
464 val = SESSEND | IDDIG;
465 omap4_usb_phy_mailbox(glue, val);
466 }
467 }
468
469 static int omap2430_musb_exit(struct musb *musb)
470 {
471 del_timer_sync(&musb_idle_timer);
472
473 omap2430_low_level_exit(musb);
474
475 return 0;
476 }
477
478 static const struct musb_platform_ops omap2430_ops = {
479 .init = omap2430_musb_init,
480 .exit = omap2430_musb_exit,
481
482 .set_mode = omap2430_musb_set_mode,
483 .try_idle = omap2430_musb_try_idle,
484
485 .set_vbus = omap2430_musb_set_vbus,
486
487 .enable = omap2430_musb_enable,
488 .disable = omap2430_musb_disable,
489 };
490
491 static u64 omap2430_dmamask = DMA_BIT_MASK(32);
492
493 static int omap2430_probe(struct platform_device *pdev)
494 {
495 struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data;
496 struct omap_musb_board_data *data;
497 struct platform_device *musb;
498 struct omap2430_glue *glue;
499 struct device_node *np = pdev->dev.of_node;
500 struct musb_hdrc_config *config;
501 struct resource *res;
502 int ret = -ENOMEM;
503
504 glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
505 if (!glue) {
506 dev_err(&pdev->dev, "failed to allocate glue context\n");
507 goto err0;
508 }
509
510 musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
511 if (!musb) {
512 dev_err(&pdev->dev, "failed to allocate musb device\n");
513 goto err0;
514 }
515
516 musb->dev.parent = &pdev->dev;
517 musb->dev.dma_mask = &omap2430_dmamask;
518 musb->dev.coherent_dma_mask = omap2430_dmamask;
519
520 glue->dev = &pdev->dev;
521 glue->musb = musb;
522 glue->status = OMAP_MUSB_UNKNOWN;
523
524 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
525
526 glue->control_otghs = devm_ioremap_resource(&pdev->dev, res);
527
528 if (np) {
529 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
530 if (!pdata) {
531 dev_err(&pdev->dev,
532 "failed to allocate musb platfrom data\n");
533 ret = -ENOMEM;
534 goto err2;
535 }
536
537 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
538 if (!data) {
539 dev_err(&pdev->dev,
540 "failed to allocate musb board data\n");
541 ret = -ENOMEM;
542 goto err2;
543 }
544
545 config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL);
546 if (!data) {
547 dev_err(&pdev->dev,
548 "failed to allocate musb hdrc config\n");
549 goto err2;
550 }
551
552 of_property_read_u32(np, "mode", (u32 *)&pdata->mode);
553 of_property_read_u32(np, "interface_type",
554 (u32 *)&data->interface_type);
555 of_property_read_u32(np, "num_eps", (u32 *)&config->num_eps);
556 of_property_read_u32(np, "ram_bits", (u32 *)&config->ram_bits);
557 of_property_read_u32(np, "power", (u32 *)&pdata->power);
558 config->multipoint = of_property_read_bool(np, "multipoint");
559
560 pdata->board_data = data;
561 pdata->config = config;
562 }
563
564 pdata->platform_ops = &omap2430_ops;
565
566 platform_set_drvdata(pdev, glue);
567
568 /*
569 * REVISIT if we ever have two instances of the wrapper, we will be
570 * in big trouble
571 */
572 _glue = glue;
573
574 INIT_WORK(&glue->omap_musb_mailbox_work, omap_musb_mailbox_work);
575
576 ret = platform_device_add_resources(musb, pdev->resource,
577 pdev->num_resources);
578 if (ret) {
579 dev_err(&pdev->dev, "failed to add resources\n");
580 goto err2;
581 }
582
583 ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
584 if (ret) {
585 dev_err(&pdev->dev, "failed to add platform_data\n");
586 goto err2;
587 }
588
589 pm_runtime_enable(&pdev->dev);
590
591 ret = platform_device_add(musb);
592 if (ret) {
593 dev_err(&pdev->dev, "failed to register musb device\n");
594 goto err2;
595 }
596
597 return 0;
598
599 err2:
600 platform_device_put(musb);
601
602 err0:
603 return ret;
604 }
605
606 static int omap2430_remove(struct platform_device *pdev)
607 {
608 struct omap2430_glue *glue = platform_get_drvdata(pdev);
609
610 cancel_work_sync(&glue->omap_musb_mailbox_work);
611 platform_device_unregister(glue->musb);
612
613 return 0;
614 }
615
616 #ifdef CONFIG_PM
617
618 static int omap2430_runtime_suspend(struct device *dev)
619 {
620 struct omap2430_glue *glue = dev_get_drvdata(dev);
621 struct musb *musb = glue_to_musb(glue);
622
623 if (musb) {
624 musb->context.otg_interfsel = musb_readl(musb->mregs,
625 OTG_INTERFSEL);
626
627 omap2430_low_level_exit(musb);
628 usb_phy_set_suspend(musb->xceiv, 1);
629 }
630
631 return 0;
632 }
633
634 static int omap2430_runtime_resume(struct device *dev)
635 {
636 struct omap2430_glue *glue = dev_get_drvdata(dev);
637 struct musb *musb = glue_to_musb(glue);
638
639 if (musb) {
640 omap2430_low_level_init(musb);
641 musb_writel(musb->mregs, OTG_INTERFSEL,
642 musb->context.otg_interfsel);
643
644 usb_phy_set_suspend(musb->xceiv, 0);
645 }
646
647 return 0;
648 }
649
650 static struct dev_pm_ops omap2430_pm_ops = {
651 .runtime_suspend = omap2430_runtime_suspend,
652 .runtime_resume = omap2430_runtime_resume,
653 };
654
655 #define DEV_PM_OPS (&omap2430_pm_ops)
656 #else
657 #define DEV_PM_OPS NULL
658 #endif
659
660 #ifdef CONFIG_OF
661 static const struct of_device_id omap2430_id_table[] = {
662 {
663 .compatible = "ti,omap4-musb"
664 },
665 {
666 .compatible = "ti,omap3-musb"
667 },
668 {},
669 };
670 MODULE_DEVICE_TABLE(of, omap2430_id_table);
671 #endif
672
673 static struct platform_driver omap2430_driver = {
674 .probe = omap2430_probe,
675 .remove = omap2430_remove,
676 .driver = {
677 .name = "musb-omap2430",
678 .pm = DEV_PM_OPS,
679 .of_match_table = of_match_ptr(omap2430_id_table),
680 },
681 };
682
683 MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
684 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
685 MODULE_LICENSE("GPL v2");
686
687 static int __init omap2430_init(void)
688 {
689 return platform_driver_register(&omap2430_driver);
690 }
691 subsys_initcall(omap2430_init);
692
693 static void __exit omap2430_exit(void)
694 {
695 platform_driver_unregister(&omap2430_driver);
696 }
697 module_exit(omap2430_exit);
Linux kernel - Deliverables
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