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