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usb: renesas_usbhs: common: remove duplicate check on resource
[deliverable/linux.git] / drivers / usb / renesas_usbhs / common.c
1 /*
2 * Renesas USB driver
3 *
4 * Copyright (C) 2011 Renesas Solutions Corp.
5 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
15 *
16 */
17 #include <linux/err.h>
18 #include <linux/gpio.h>
19 #include <linux/io.h>
20 #include <linux/module.h>
21 #include <linux/of_device.h>
22 #include <linux/of_gpio.h>
23 #include <linux/pm_runtime.h>
24 #include <linux/slab.h>
25 #include <linux/sysfs.h>
26 #include "common.h"
27 #include "rcar2.h"
28
29 /*
30 * image of renesas_usbhs
31 *
32 * ex) gadget case
33
34 * mod.c
35 * mod_gadget.c
36 * mod_host.c pipe.c fifo.c
37 *
38 * +-------+ +-----------+
39 * | pipe0 |------>| fifo pio |
40 * +------------+ +-------+ +-----------+
41 * | mod_gadget |=====> | pipe1 |--+
42 * +------------+ +-------+ | +-----------+
43 * | pipe2 | | +-| fifo dma0 |
44 * +------------+ +-------+ | | +-----------+
45 * | mod_host | | pipe3 |<-|--+
46 * +------------+ +-------+ | +-----------+
47 * | .... | +--->| fifo dma1 |
48 * | .... | +-----------+
49 */
50
51
52 #define USBHSF_RUNTIME_PWCTRL (1 << 0)
53
54 /* status */
55 #define usbhsc_flags_init(p) do {(p)->flags = 0; } while (0)
56 #define usbhsc_flags_set(p, b) ((p)->flags |= (b))
57 #define usbhsc_flags_clr(p, b) ((p)->flags &= ~(b))
58 #define usbhsc_flags_has(p, b) ((p)->flags & (b))
59
60 /*
61 * platform call back
62 *
63 * renesas usb support platform callback function.
64 * Below macro call it.
65 * if platform doesn't have callback, it return 0 (no error)
66 */
67 #define usbhs_platform_call(priv, func, args...)\
68 (!(priv) ? -ENODEV : \
69 !((priv)->pfunc.func) ? 0 : \
70 (priv)->pfunc.func(args))
71
72 /*
73 * common functions
74 */
75 u16 usbhs_read(struct usbhs_priv *priv, u32 reg)
76 {
77 return ioread16(priv->base + reg);
78 }
79
80 void usbhs_write(struct usbhs_priv *priv, u32 reg, u16 data)
81 {
82 iowrite16(data, priv->base + reg);
83 }
84
85 void usbhs_bset(struct usbhs_priv *priv, u32 reg, u16 mask, u16 data)
86 {
87 u16 val = usbhs_read(priv, reg);
88
89 val &= ~mask;
90 val |= data & mask;
91
92 usbhs_write(priv, reg, val);
93 }
94
95 struct usbhs_priv *usbhs_pdev_to_priv(struct platform_device *pdev)
96 {
97 return dev_get_drvdata(&pdev->dev);
98 }
99
100 /*
101 * syscfg functions
102 */
103 static void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable)
104 {
105 usbhs_bset(priv, SYSCFG, SCKE, enable ? SCKE : 0);
106 }
107
108 void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable)
109 {
110 u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
111 u16 val = DCFM | DRPD | HSE | USBE;
112 int has_otg = usbhs_get_dparam(priv, has_otg);
113
114 if (has_otg)
115 usbhs_bset(priv, DVSTCTR, (EXTLP | PWEN), (EXTLP | PWEN));
116
117 /*
118 * if enable
119 *
120 * - select Host mode
121 * - D+ Line/D- Line Pull-down
122 */
123 usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
124 }
125
126 void usbhs_sys_function_ctrl(struct usbhs_priv *priv, int enable)
127 {
128 u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
129 u16 val = DPRPU | HSE | USBE;
130
131 /*
132 * if enable
133 *
134 * - select Function mode
135 * - D+ Line Pull-up
136 */
137 usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
138 }
139
140 void usbhs_sys_function_pullup(struct usbhs_priv *priv, int enable)
141 {
142 usbhs_bset(priv, SYSCFG, DPRPU, enable ? DPRPU : 0);
143 }
144
145 void usbhs_sys_set_test_mode(struct usbhs_priv *priv, u16 mode)
146 {
147 usbhs_write(priv, TESTMODE, mode);
148 }
149
150 /*
151 * frame functions
152 */
153 int usbhs_frame_get_num(struct usbhs_priv *priv)
154 {
155 return usbhs_read(priv, FRMNUM) & FRNM_MASK;
156 }
157
158 /*
159 * usb request functions
160 */
161 void usbhs_usbreq_get_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
162 {
163 u16 val;
164
165 val = usbhs_read(priv, USBREQ);
166 req->bRequest = (val >> 8) & 0xFF;
167 req->bRequestType = (val >> 0) & 0xFF;
168
169 req->wValue = usbhs_read(priv, USBVAL);
170 req->wIndex = usbhs_read(priv, USBINDX);
171 req->wLength = usbhs_read(priv, USBLENG);
172 }
173
174 void usbhs_usbreq_set_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
175 {
176 usbhs_write(priv, USBREQ, (req->bRequest << 8) | req->bRequestType);
177 usbhs_write(priv, USBVAL, req->wValue);
178 usbhs_write(priv, USBINDX, req->wIndex);
179 usbhs_write(priv, USBLENG, req->wLength);
180
181 usbhs_bset(priv, DCPCTR, SUREQ, SUREQ);
182 }
183
184 /*
185 * bus/vbus functions
186 */
187 void usbhs_bus_send_sof_enable(struct usbhs_priv *priv)
188 {
189 u16 status = usbhs_read(priv, DVSTCTR) & (USBRST | UACT);
190
191 if (status != USBRST) {
192 struct device *dev = usbhs_priv_to_dev(priv);
193 dev_err(dev, "usbhs should be reset\n");
194 }
195
196 usbhs_bset(priv, DVSTCTR, (USBRST | UACT), UACT);
197 }
198
199 void usbhs_bus_send_reset(struct usbhs_priv *priv)
200 {
201 usbhs_bset(priv, DVSTCTR, (USBRST | UACT), USBRST);
202 }
203
204 int usbhs_bus_get_speed(struct usbhs_priv *priv)
205 {
206 u16 dvstctr = usbhs_read(priv, DVSTCTR);
207
208 switch (RHST & dvstctr) {
209 case RHST_LOW_SPEED:
210 return USB_SPEED_LOW;
211 case RHST_FULL_SPEED:
212 return USB_SPEED_FULL;
213 case RHST_HIGH_SPEED:
214 return USB_SPEED_HIGH;
215 }
216
217 return USB_SPEED_UNKNOWN;
218 }
219
220 int usbhs_vbus_ctrl(struct usbhs_priv *priv, int enable)
221 {
222 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
223
224 return usbhs_platform_call(priv, set_vbus, pdev, enable);
225 }
226
227 static void usbhsc_bus_init(struct usbhs_priv *priv)
228 {
229 usbhs_write(priv, DVSTCTR, 0);
230
231 usbhs_vbus_ctrl(priv, 0);
232 }
233
234 /*
235 * device configuration
236 */
237 int usbhs_set_device_config(struct usbhs_priv *priv, int devnum,
238 u16 upphub, u16 hubport, u16 speed)
239 {
240 struct device *dev = usbhs_priv_to_dev(priv);
241 u16 usbspd = 0;
242 u32 reg = DEVADD0 + (2 * devnum);
243
244 if (devnum > 10) {
245 dev_err(dev, "cannot set speed to unknown device %d\n", devnum);
246 return -EIO;
247 }
248
249 if (upphub > 0xA) {
250 dev_err(dev, "unsupported hub number %d\n", upphub);
251 return -EIO;
252 }
253
254 switch (speed) {
255 case USB_SPEED_LOW:
256 usbspd = USBSPD_SPEED_LOW;
257 break;
258 case USB_SPEED_FULL:
259 usbspd = USBSPD_SPEED_FULL;
260 break;
261 case USB_SPEED_HIGH:
262 usbspd = USBSPD_SPEED_HIGH;
263 break;
264 default:
265 dev_err(dev, "unsupported speed %d\n", speed);
266 return -EIO;
267 }
268
269 usbhs_write(priv, reg, UPPHUB(upphub) |
270 HUBPORT(hubport)|
271 USBSPD(usbspd));
272
273 return 0;
274 }
275
276 /*
277 * local functions
278 */
279 static void usbhsc_set_buswait(struct usbhs_priv *priv)
280 {
281 int wait = usbhs_get_dparam(priv, buswait_bwait);
282
283 /* set bus wait if platform have */
284 if (wait)
285 usbhs_bset(priv, BUSWAIT, 0x000F, wait);
286 }
287
288 /*
289 * platform default param
290 */
291
292 /* commonly used on old SH-Mobile SoCs */
293 static u32 usbhsc_default_pipe_type[] = {
294 USB_ENDPOINT_XFER_CONTROL,
295 USB_ENDPOINT_XFER_ISOC,
296 USB_ENDPOINT_XFER_ISOC,
297 USB_ENDPOINT_XFER_BULK,
298 USB_ENDPOINT_XFER_BULK,
299 USB_ENDPOINT_XFER_BULK,
300 USB_ENDPOINT_XFER_INT,
301 USB_ENDPOINT_XFER_INT,
302 USB_ENDPOINT_XFER_INT,
303 USB_ENDPOINT_XFER_INT,
304 };
305
306 /* commonly used on newer SH-Mobile and R-Car SoCs */
307 static u32 usbhsc_new_pipe_type[] = {
308 USB_ENDPOINT_XFER_CONTROL,
309 USB_ENDPOINT_XFER_ISOC,
310 USB_ENDPOINT_XFER_ISOC,
311 USB_ENDPOINT_XFER_BULK,
312 USB_ENDPOINT_XFER_BULK,
313 USB_ENDPOINT_XFER_BULK,
314 USB_ENDPOINT_XFER_INT,
315 USB_ENDPOINT_XFER_INT,
316 USB_ENDPOINT_XFER_INT,
317 USB_ENDPOINT_XFER_BULK,
318 USB_ENDPOINT_XFER_BULK,
319 USB_ENDPOINT_XFER_BULK,
320 USB_ENDPOINT_XFER_BULK,
321 USB_ENDPOINT_XFER_BULK,
322 USB_ENDPOINT_XFER_BULK,
323 USB_ENDPOINT_XFER_BULK,
324 };
325
326 /*
327 * power control
328 */
329 static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable)
330 {
331 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
332 struct device *dev = usbhs_priv_to_dev(priv);
333
334 if (enable) {
335 /* enable PM */
336 pm_runtime_get_sync(dev);
337
338 /* enable platform power */
339 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
340
341 /* USB on */
342 usbhs_sys_clock_ctrl(priv, enable);
343 } else {
344 /* USB off */
345 usbhs_sys_clock_ctrl(priv, enable);
346
347 /* disable platform power */
348 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
349
350 /* disable PM */
351 pm_runtime_put_sync(dev);
352 }
353 }
354
355 /*
356 * hotplug
357 */
358 static void usbhsc_hotplug(struct usbhs_priv *priv)
359 {
360 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
361 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
362 int id;
363 int enable;
364 int ret;
365
366 /*
367 * get vbus status from platform
368 */
369 enable = usbhs_platform_call(priv, get_vbus, pdev);
370
371 /*
372 * get id from platform
373 */
374 id = usbhs_platform_call(priv, get_id, pdev);
375
376 if (enable && !mod) {
377 ret = usbhs_mod_change(priv, id);
378 if (ret < 0)
379 return;
380
381 dev_dbg(&pdev->dev, "%s enable\n", __func__);
382
383 /* power on */
384 if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
385 usbhsc_power_ctrl(priv, enable);
386
387 /* bus init */
388 usbhsc_set_buswait(priv);
389 usbhsc_bus_init(priv);
390
391 /* module start */
392 usbhs_mod_call(priv, start, priv);
393
394 } else if (!enable && mod) {
395 dev_dbg(&pdev->dev, "%s disable\n", __func__);
396
397 /* module stop */
398 usbhs_mod_call(priv, stop, priv);
399
400 /* bus init */
401 usbhsc_bus_init(priv);
402
403 /* power off */
404 if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
405 usbhsc_power_ctrl(priv, enable);
406
407 usbhs_mod_change(priv, -1);
408
409 /* reset phy for next connection */
410 usbhs_platform_call(priv, phy_reset, pdev);
411 }
412 }
413
414 /*
415 * notify hotplug
416 */
417 static void usbhsc_notify_hotplug(struct work_struct *work)
418 {
419 struct usbhs_priv *priv = container_of(work,
420 struct usbhs_priv,
421 notify_hotplug_work.work);
422 usbhsc_hotplug(priv);
423 }
424
425 static int usbhsc_drvcllbck_notify_hotplug(struct platform_device *pdev)
426 {
427 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
428 int delay = usbhs_get_dparam(priv, detection_delay);
429
430 /*
431 * This functions will be called in interrupt.
432 * To make sure safety context,
433 * use workqueue for usbhs_notify_hotplug
434 */
435 schedule_delayed_work(&priv->notify_hotplug_work,
436 msecs_to_jiffies(delay));
437 return 0;
438 }
439
440 /*
441 * platform functions
442 */
443 static const struct of_device_id usbhs_of_match[] = {
444 {
445 .compatible = "renesas,usbhs-r8a7790",
446 .data = (void *)USBHS_TYPE_R8A7790,
447 },
448 {
449 .compatible = "renesas,usbhs-r8a7791",
450 .data = (void *)USBHS_TYPE_R8A7791,
451 },
452 { },
453 };
454 MODULE_DEVICE_TABLE(of, usbhs_of_match);
455
456 static struct renesas_usbhs_platform_info *usbhs_parse_dt(struct device *dev)
457 {
458 struct renesas_usbhs_platform_info *info;
459 struct renesas_usbhs_driver_param *dparam;
460 const struct of_device_id *of_id = of_match_device(usbhs_of_match, dev);
461 u32 tmp;
462 int gpio;
463
464 info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
465 if (!info)
466 return NULL;
467
468 dparam = &info->driver_param;
469 dparam->type = of_id ? (u32)of_id->data : 0;
470 if (!of_property_read_u32(dev->of_node, "renesas,buswait", &tmp))
471 dparam->buswait_bwait = tmp;
472 gpio = of_get_named_gpio_flags(dev->of_node, "renesas,enable-gpio", 0,
473 NULL);
474 if (gpio > 0)
475 dparam->enable_gpio = gpio;
476
477 return info;
478 }
479
480 static int usbhs_probe(struct platform_device *pdev)
481 {
482 struct renesas_usbhs_platform_info *info = dev_get_platdata(&pdev->dev);
483 struct renesas_usbhs_driver_callback *dfunc;
484 struct usbhs_priv *priv;
485 struct resource *res, *irq_res;
486 int ret;
487
488 /* check device node */
489 if (pdev->dev.of_node)
490 info = pdev->dev.platform_data = usbhs_parse_dt(&pdev->dev);
491
492 /* check platform information */
493 if (!info) {
494 dev_err(&pdev->dev, "no platform information\n");
495 return -EINVAL;
496 }
497
498 /* platform data */
499 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
500 if (!irq_res) {
501 dev_err(&pdev->dev, "Not enough Renesas USB platform resources.\n");
502 return -ENODEV;
503 }
504
505 /* usb private data */
506 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
507 if (!priv)
508 return -ENOMEM;
509
510 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
511 priv->base = devm_ioremap_resource(&pdev->dev, res);
512 if (IS_ERR(priv->base))
513 return PTR_ERR(priv->base);
514
515 /*
516 * care platform info
517 */
518
519 memcpy(&priv->dparam,
520 &info->driver_param,
521 sizeof(struct renesas_usbhs_driver_param));
522
523 switch (priv->dparam.type) {
524 case USBHS_TYPE_R8A7790:
525 case USBHS_TYPE_R8A7791:
526 priv->pfunc = usbhs_rcar2_ops;
527 if (!priv->dparam.pipe_type) {
528 priv->dparam.pipe_type = usbhsc_new_pipe_type;
529 priv->dparam.pipe_size =
530 ARRAY_SIZE(usbhsc_new_pipe_type);
531 }
532 break;
533 default:
534 if (!info->platform_callback.get_id) {
535 dev_err(&pdev->dev, "no platform callbacks");
536 return -EINVAL;
537 }
538 memcpy(&priv->pfunc,
539 &info->platform_callback,
540 sizeof(struct renesas_usbhs_platform_callback));
541 break;
542 }
543
544 /* set driver callback functions for platform */
545 dfunc = &info->driver_callback;
546 dfunc->notify_hotplug = usbhsc_drvcllbck_notify_hotplug;
547
548 /* set default param if platform doesn't have */
549 if (!priv->dparam.pipe_type) {
550 priv->dparam.pipe_type = usbhsc_default_pipe_type;
551 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe_type);
552 }
553 if (!priv->dparam.pio_dma_border)
554 priv->dparam.pio_dma_border = 64; /* 64byte */
555
556 /* FIXME */
557 /* runtime power control ? */
558 if (priv->pfunc.get_vbus)
559 usbhsc_flags_set(priv, USBHSF_RUNTIME_PWCTRL);
560
561 /*
562 * priv settings
563 */
564 priv->irq = irq_res->start;
565 if (irq_res->flags & IORESOURCE_IRQ_SHAREABLE)
566 priv->irqflags = IRQF_SHARED;
567 priv->pdev = pdev;
568 INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug);
569 spin_lock_init(usbhs_priv_to_lock(priv));
570
571 /* call pipe and module init */
572 ret = usbhs_pipe_probe(priv);
573 if (ret < 0)
574 return ret;
575
576 ret = usbhs_fifo_probe(priv);
577 if (ret < 0)
578 goto probe_end_pipe_exit;
579
580 ret = usbhs_mod_probe(priv);
581 if (ret < 0)
582 goto probe_end_fifo_exit;
583
584 /* dev_set_drvdata should be called after usbhs_mod_init */
585 platform_set_drvdata(pdev, priv);
586
587 /*
588 * deviece reset here because
589 * USB device might be used in boot loader.
590 */
591 usbhs_sys_clock_ctrl(priv, 0);
592
593 /* check GPIO determining if USB function should be enabled */
594 if (priv->dparam.enable_gpio) {
595 gpio_request_one(priv->dparam.enable_gpio, GPIOF_IN, NULL);
596 ret = !gpio_get_value(priv->dparam.enable_gpio);
597 gpio_free(priv->dparam.enable_gpio);
598 if (ret) {
599 dev_warn(&pdev->dev,
600 "USB function not selected (GPIO %d)\n",
601 priv->dparam.enable_gpio);
602 ret = -ENOTSUPP;
603 goto probe_end_mod_exit;
604 }
605 }
606
607 /*
608 * platform call
609 *
610 * USB phy setup might depend on CPU/Board.
611 * If platform has its callback functions,
612 * call it here.
613 */
614 ret = usbhs_platform_call(priv, hardware_init, pdev);
615 if (ret < 0) {
616 dev_err(&pdev->dev, "platform prove failed.\n");
617 goto probe_end_mod_exit;
618 }
619
620 /* reset phy for connection */
621 usbhs_platform_call(priv, phy_reset, pdev);
622
623 /* power control */
624 pm_runtime_enable(&pdev->dev);
625 if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) {
626 usbhsc_power_ctrl(priv, 1);
627 usbhs_mod_autonomy_mode(priv);
628 }
629
630 /*
631 * manual call notify_hotplug for cold plug
632 */
633 ret = usbhsc_drvcllbck_notify_hotplug(pdev);
634 if (ret < 0)
635 goto probe_end_call_remove;
636
637 dev_info(&pdev->dev, "probed\n");
638
639 return ret;
640
641 probe_end_call_remove:
642 usbhs_platform_call(priv, hardware_exit, pdev);
643 probe_end_mod_exit:
644 usbhs_mod_remove(priv);
645 probe_end_fifo_exit:
646 usbhs_fifo_remove(priv);
647 probe_end_pipe_exit:
648 usbhs_pipe_remove(priv);
649
650 dev_info(&pdev->dev, "probe failed\n");
651
652 return ret;
653 }
654
655 static int usbhs_remove(struct platform_device *pdev)
656 {
657 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
658 struct renesas_usbhs_platform_info *info = dev_get_platdata(&pdev->dev);
659 struct renesas_usbhs_driver_callback *dfunc = &info->driver_callback;
660
661 dev_dbg(&pdev->dev, "usb remove\n");
662
663 dfunc->notify_hotplug = NULL;
664
665 /* power off */
666 if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
667 usbhsc_power_ctrl(priv, 0);
668
669 pm_runtime_disable(&pdev->dev);
670
671 usbhs_platform_call(priv, hardware_exit, pdev);
672 usbhs_mod_remove(priv);
673 usbhs_fifo_remove(priv);
674 usbhs_pipe_remove(priv);
675
676 return 0;
677 }
678
679 static int usbhsc_suspend(struct device *dev)
680 {
681 struct usbhs_priv *priv = dev_get_drvdata(dev);
682 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
683
684 if (mod) {
685 usbhs_mod_call(priv, stop, priv);
686 usbhs_mod_change(priv, -1);
687 }
688
689 if (mod || !usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
690 usbhsc_power_ctrl(priv, 0);
691
692 return 0;
693 }
694
695 static int usbhsc_resume(struct device *dev)
696 {
697 struct usbhs_priv *priv = dev_get_drvdata(dev);
698 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
699
700 if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
701 usbhsc_power_ctrl(priv, 1);
702
703 usbhs_platform_call(priv, phy_reset, pdev);
704
705 usbhsc_drvcllbck_notify_hotplug(pdev);
706
707 return 0;
708 }
709
710 static int usbhsc_runtime_nop(struct device *dev)
711 {
712 /* Runtime PM callback shared between ->runtime_suspend()
713 * and ->runtime_resume(). Simply returns success.
714 *
715 * This driver re-initializes all registers after
716 * pm_runtime_get_sync() anyway so there is no need
717 * to save and restore registers here.
718 */
719 return 0;
720 }
721
722 static const struct dev_pm_ops usbhsc_pm_ops = {
723 .suspend = usbhsc_suspend,
724 .resume = usbhsc_resume,
725 .runtime_suspend = usbhsc_runtime_nop,
726 .runtime_resume = usbhsc_runtime_nop,
727 };
728
729 static struct platform_driver renesas_usbhs_driver = {
730 .driver = {
731 .name = "renesas_usbhs",
732 .pm = &usbhsc_pm_ops,
733 .of_match_table = of_match_ptr(usbhs_of_match),
734 },
735 .probe = usbhs_probe,
736 .remove = usbhs_remove,
737 };
738
739 module_platform_driver(renesas_usbhs_driver);
740
741 MODULE_LICENSE("GPL");
742 MODULE_DESCRIPTION("Renesas USB driver");
743 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
Linux kernel - Deliverables
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