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Magnus Damm9570ef22009-05-01 06:51:00 +00001/*
2 * SuperH Timer Support - TMU
3 *
4 * Copyright (C) 2009 Magnus Damm
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20#include <linux/init.h>
21#include <linux/platform_device.h>
22#include <linux/spinlock.h>
23#include <linux/interrupt.h>
24#include <linux/ioport.h>
25#include <linux/delay.h>
26#include <linux/io.h>
27#include <linux/clk.h>
28#include <linux/irq.h>
29#include <linux/err.h>
30#include <linux/clocksource.h>
31#include <linux/clockchips.h>
Paul Mundt46a12f72009-05-03 17:57:17 +090032#include <linux/sh_timer.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090033#include <linux/slab.h>
Paul Gortmaker7deeab52011-07-03 13:36:22 -040034#include <linux/module.h>
Rafael J. Wysocki2ee619f2012-03-13 22:40:00 +010035#include <linux/pm_domain.h>
Rafael J. Wysockieaa49a82012-08-06 01:41:20 +020036#include <linux/pm_runtime.h>
Magnus Damm9570ef22009-05-01 06:51:00 +000037
38struct sh_tmu_priv {
39 void __iomem *mapbase;
40 struct clk *clk;
41 struct irqaction irqaction;
42 struct platform_device *pdev;
43 unsigned long rate;
44 unsigned long periodic;
45 struct clock_event_device ced;
46 struct clocksource cs;
Rafael J. Wysockieaa49a82012-08-06 01:41:20 +020047 bool cs_enabled;
Rafael J. Wysocki61a53bf2012-08-06 01:48:17 +020048 unsigned int enable_count;
Magnus Damm9570ef22009-05-01 06:51:00 +000049};
50
Paul Mundtc2225a52012-05-25 13:39:09 +090051static DEFINE_RAW_SPINLOCK(sh_tmu_lock);
Magnus Damm9570ef22009-05-01 06:51:00 +000052
53#define TSTR -1 /* shared register */
54#define TCOR 0 /* channel register */
55#define TCNT 1 /* channel register */
56#define TCR 2 /* channel register */
57
58static inline unsigned long sh_tmu_read(struct sh_tmu_priv *p, int reg_nr)
59{
Paul Mundt46a12f72009-05-03 17:57:17 +090060 struct sh_timer_config *cfg = p->pdev->dev.platform_data;
Magnus Damm9570ef22009-05-01 06:51:00 +000061 void __iomem *base = p->mapbase;
62 unsigned long offs;
63
64 if (reg_nr == TSTR)
65 return ioread8(base - cfg->channel_offset);
66
67 offs = reg_nr << 2;
68
69 if (reg_nr == TCR)
70 return ioread16(base + offs);
71 else
72 return ioread32(base + offs);
73}
74
75static inline void sh_tmu_write(struct sh_tmu_priv *p, int reg_nr,
76 unsigned long value)
77{
Paul Mundt46a12f72009-05-03 17:57:17 +090078 struct sh_timer_config *cfg = p->pdev->dev.platform_data;
Magnus Damm9570ef22009-05-01 06:51:00 +000079 void __iomem *base = p->mapbase;
80 unsigned long offs;
81
82 if (reg_nr == TSTR) {
83 iowrite8(value, base - cfg->channel_offset);
84 return;
85 }
86
87 offs = reg_nr << 2;
88
89 if (reg_nr == TCR)
90 iowrite16(value, base + offs);
91 else
92 iowrite32(value, base + offs);
93}
94
95static void sh_tmu_start_stop_ch(struct sh_tmu_priv *p, int start)
96{
Paul Mundt46a12f72009-05-03 17:57:17 +090097 struct sh_timer_config *cfg = p->pdev->dev.platform_data;
Magnus Damm9570ef22009-05-01 06:51:00 +000098 unsigned long flags, value;
99
100 /* start stop register shared by multiple timer channels */
Paul Mundtc2225a52012-05-25 13:39:09 +0900101 raw_spin_lock_irqsave(&sh_tmu_lock, flags);
Magnus Damm9570ef22009-05-01 06:51:00 +0000102 value = sh_tmu_read(p, TSTR);
103
104 if (start)
105 value |= 1 << cfg->timer_bit;
106 else
107 value &= ~(1 << cfg->timer_bit);
108
109 sh_tmu_write(p, TSTR, value);
Paul Mundtc2225a52012-05-25 13:39:09 +0900110 raw_spin_unlock_irqrestore(&sh_tmu_lock, flags);
Magnus Damm9570ef22009-05-01 06:51:00 +0000111}
112
Rafael J. Wysocki61a53bf2012-08-06 01:48:17 +0200113static int __sh_tmu_enable(struct sh_tmu_priv *p)
Magnus Damm9570ef22009-05-01 06:51:00 +0000114{
Magnus Damm9570ef22009-05-01 06:51:00 +0000115 int ret;
116
Paul Mundtd4905ce2011-05-31 15:23:20 +0900117 /* enable clock */
Magnus Damm9570ef22009-05-01 06:51:00 +0000118 ret = clk_enable(p->clk);
119 if (ret) {
Paul Mundt214a6072010-03-10 16:26:25 +0900120 dev_err(&p->pdev->dev, "cannot enable clock\n");
Magnus Damm9570ef22009-05-01 06:51:00 +0000121 return ret;
122 }
123
124 /* make sure channel is disabled */
125 sh_tmu_start_stop_ch(p, 0);
126
127 /* maximum timeout */
128 sh_tmu_write(p, TCOR, 0xffffffff);
129 sh_tmu_write(p, TCNT, 0xffffffff);
130
131 /* configure channel to parent clock / 4, irq off */
132 p->rate = clk_get_rate(p->clk) / 4;
133 sh_tmu_write(p, TCR, 0x0000);
134
135 /* enable channel */
136 sh_tmu_start_stop_ch(p, 1);
137
138 return 0;
139}
140
Rafael J. Wysocki61a53bf2012-08-06 01:48:17 +0200141static int sh_tmu_enable(struct sh_tmu_priv *p)
142{
143 if (p->enable_count++ > 0)
144 return 0;
145
146 pm_runtime_get_sync(&p->pdev->dev);
147 dev_pm_syscore_device(&p->pdev->dev, true);
148
149 return __sh_tmu_enable(p);
150}
151
152static void __sh_tmu_disable(struct sh_tmu_priv *p)
Magnus Damm9570ef22009-05-01 06:51:00 +0000153{
154 /* disable channel */
155 sh_tmu_start_stop_ch(p, 0);
156
Magnus Dammbe890a12009-06-17 05:04:04 +0000157 /* disable interrupts in TMU block */
158 sh_tmu_write(p, TCR, 0x0000);
159
Paul Mundtd4905ce2011-05-31 15:23:20 +0900160 /* stop clock */
Magnus Damm9570ef22009-05-01 06:51:00 +0000161 clk_disable(p->clk);
162}
163
Rafael J. Wysocki61a53bf2012-08-06 01:48:17 +0200164static void sh_tmu_disable(struct sh_tmu_priv *p)
165{
166 if (WARN_ON(p->enable_count == 0))
167 return;
168
169 if (--p->enable_count > 0)
170 return;
171
172 __sh_tmu_disable(p);
173
174 dev_pm_syscore_device(&p->pdev->dev, false);
175 pm_runtime_put(&p->pdev->dev);
176}
177
Magnus Damm9570ef22009-05-01 06:51:00 +0000178static void sh_tmu_set_next(struct sh_tmu_priv *p, unsigned long delta,
179 int periodic)
180{
181 /* stop timer */
182 sh_tmu_start_stop_ch(p, 0);
183
184 /* acknowledge interrupt */
185 sh_tmu_read(p, TCR);
186
187 /* enable interrupt */
188 sh_tmu_write(p, TCR, 0x0020);
189
190 /* reload delta value in case of periodic timer */
191 if (periodic)
192 sh_tmu_write(p, TCOR, delta);
193 else
Shin-ichiro KAWASAKI6f4b67b2009-06-21 10:56:22 +0000194 sh_tmu_write(p, TCOR, 0xffffffff);
Magnus Damm9570ef22009-05-01 06:51:00 +0000195
196 sh_tmu_write(p, TCNT, delta);
197
198 /* start timer */
199 sh_tmu_start_stop_ch(p, 1);
200}
201
202static irqreturn_t sh_tmu_interrupt(int irq, void *dev_id)
203{
204 struct sh_tmu_priv *p = dev_id;
205
206 /* disable or acknowledge interrupt */
207 if (p->ced.mode == CLOCK_EVT_MODE_ONESHOT)
208 sh_tmu_write(p, TCR, 0x0000);
209 else
210 sh_tmu_write(p, TCR, 0x0020);
211
212 /* notify clockevent layer */
213 p->ced.event_handler(&p->ced);
214 return IRQ_HANDLED;
215}
216
217static struct sh_tmu_priv *cs_to_sh_tmu(struct clocksource *cs)
218{
219 return container_of(cs, struct sh_tmu_priv, cs);
220}
221
222static cycle_t sh_tmu_clocksource_read(struct clocksource *cs)
223{
224 struct sh_tmu_priv *p = cs_to_sh_tmu(cs);
225
226 return sh_tmu_read(p, TCNT) ^ 0xffffffff;
227}
228
229static int sh_tmu_clocksource_enable(struct clocksource *cs)
230{
231 struct sh_tmu_priv *p = cs_to_sh_tmu(cs);
Magnus Damm0aeac452011-04-25 22:38:37 +0900232 int ret;
Magnus Damm9570ef22009-05-01 06:51:00 +0000233
Rafael J. Wysocki61a53bf2012-08-06 01:48:17 +0200234 if (WARN_ON(p->cs_enabled))
235 return 0;
236
Magnus Damm0aeac452011-04-25 22:38:37 +0900237 ret = sh_tmu_enable(p);
Rafael J. Wysockieaa49a82012-08-06 01:41:20 +0200238 if (!ret) {
Magnus Damm0aeac452011-04-25 22:38:37 +0900239 __clocksource_updatefreq_hz(cs, p->rate);
Rafael J. Wysockieaa49a82012-08-06 01:41:20 +0200240 p->cs_enabled = true;
241 }
Rafael J. Wysocki61a53bf2012-08-06 01:48:17 +0200242
Magnus Damm0aeac452011-04-25 22:38:37 +0900243 return ret;
Magnus Damm9570ef22009-05-01 06:51:00 +0000244}
245
246static void sh_tmu_clocksource_disable(struct clocksource *cs)
247{
Rafael J. Wysockieaa49a82012-08-06 01:41:20 +0200248 struct sh_tmu_priv *p = cs_to_sh_tmu(cs);
249
Rafael J. Wysocki61a53bf2012-08-06 01:48:17 +0200250 if (WARN_ON(!p->cs_enabled))
251 return;
Rafael J. Wysockieaa49a82012-08-06 01:41:20 +0200252
253 sh_tmu_disable(p);
254 p->cs_enabled = false;
255}
256
257static void sh_tmu_clocksource_suspend(struct clocksource *cs)
258{
259 struct sh_tmu_priv *p = cs_to_sh_tmu(cs);
260
Rafael J. Wysocki61a53bf2012-08-06 01:48:17 +0200261 if (!p->cs_enabled)
262 return;
Rafael J. Wysockieaa49a82012-08-06 01:41:20 +0200263
Rafael J. Wysocki61a53bf2012-08-06 01:48:17 +0200264 if (--p->enable_count == 0) {
265 __sh_tmu_disable(p);
266 pm_genpd_syscore_poweroff(&p->pdev->dev);
267 }
Rafael J. Wysockieaa49a82012-08-06 01:41:20 +0200268}
269
270static void sh_tmu_clocksource_resume(struct clocksource *cs)
271{
272 struct sh_tmu_priv *p = cs_to_sh_tmu(cs);
273
Rafael J. Wysocki61a53bf2012-08-06 01:48:17 +0200274 if (!p->cs_enabled)
275 return;
276
277 if (p->enable_count++ == 0) {
278 pm_genpd_syscore_poweron(&p->pdev->dev);
279 __sh_tmu_enable(p);
280 }
Magnus Damm9570ef22009-05-01 06:51:00 +0000281}
282
283static int sh_tmu_register_clocksource(struct sh_tmu_priv *p,
284 char *name, unsigned long rating)
285{
286 struct clocksource *cs = &p->cs;
287
288 cs->name = name;
289 cs->rating = rating;
290 cs->read = sh_tmu_clocksource_read;
291 cs->enable = sh_tmu_clocksource_enable;
292 cs->disable = sh_tmu_clocksource_disable;
Rafael J. Wysockieaa49a82012-08-06 01:41:20 +0200293 cs->suspend = sh_tmu_clocksource_suspend;
294 cs->resume = sh_tmu_clocksource_resume;
Magnus Damm9570ef22009-05-01 06:51:00 +0000295 cs->mask = CLOCKSOURCE_MASK(32);
296 cs->flags = CLOCK_SOURCE_IS_CONTINUOUS;
Aurelien Jarno66f49122010-05-31 21:45:48 +0000297
Paul Mundt214a6072010-03-10 16:26:25 +0900298 dev_info(&p->pdev->dev, "used as clock source\n");
Magnus Damm0aeac452011-04-25 22:38:37 +0900299
300 /* Register with dummy 1 Hz value, gets updated in ->enable() */
301 clocksource_register_hz(cs, 1);
Magnus Damm9570ef22009-05-01 06:51:00 +0000302 return 0;
303}
304
305static struct sh_tmu_priv *ced_to_sh_tmu(struct clock_event_device *ced)
306{
307 return container_of(ced, struct sh_tmu_priv, ced);
308}
309
310static void sh_tmu_clock_event_start(struct sh_tmu_priv *p, int periodic)
311{
312 struct clock_event_device *ced = &p->ced;
313
314 sh_tmu_enable(p);
315
Paul Mundt39774072012-06-11 17:10:16 +0900316 clockevents_config(ced, p->rate);
Magnus Damm9570ef22009-05-01 06:51:00 +0000317
318 if (periodic) {
319 p->periodic = (p->rate + HZ/2) / HZ;
320 sh_tmu_set_next(p, p->periodic, 1);
321 }
322}
323
324static void sh_tmu_clock_event_mode(enum clock_event_mode mode,
325 struct clock_event_device *ced)
326{
327 struct sh_tmu_priv *p = ced_to_sh_tmu(ced);
328 int disabled = 0;
329
330 /* deal with old setting first */
331 switch (ced->mode) {
332 case CLOCK_EVT_MODE_PERIODIC:
333 case CLOCK_EVT_MODE_ONESHOT:
334 sh_tmu_disable(p);
335 disabled = 1;
336 break;
337 default:
338 break;
339 }
340
341 switch (mode) {
342 case CLOCK_EVT_MODE_PERIODIC:
Paul Mundt214a6072010-03-10 16:26:25 +0900343 dev_info(&p->pdev->dev, "used for periodic clock events\n");
Magnus Damm9570ef22009-05-01 06:51:00 +0000344 sh_tmu_clock_event_start(p, 1);
345 break;
346 case CLOCK_EVT_MODE_ONESHOT:
Paul Mundt214a6072010-03-10 16:26:25 +0900347 dev_info(&p->pdev->dev, "used for oneshot clock events\n");
Magnus Damm9570ef22009-05-01 06:51:00 +0000348 sh_tmu_clock_event_start(p, 0);
349 break;
350 case CLOCK_EVT_MODE_UNUSED:
351 if (!disabled)
352 sh_tmu_disable(p);
353 break;
354 case CLOCK_EVT_MODE_SHUTDOWN:
355 default:
356 break;
357 }
358}
359
360static int sh_tmu_clock_event_next(unsigned long delta,
361 struct clock_event_device *ced)
362{
363 struct sh_tmu_priv *p = ced_to_sh_tmu(ced);
364
365 BUG_ON(ced->mode != CLOCK_EVT_MODE_ONESHOT);
366
367 /* program new delta value */
368 sh_tmu_set_next(p, delta, 0);
369 return 0;
370}
371
Rafael J. Wysockieaa49a82012-08-06 01:41:20 +0200372static void sh_tmu_clock_event_suspend(struct clock_event_device *ced)
373{
374 pm_genpd_syscore_poweroff(&ced_to_sh_tmu(ced)->pdev->dev);
375}
376
377static void sh_tmu_clock_event_resume(struct clock_event_device *ced)
378{
379 pm_genpd_syscore_poweron(&ced_to_sh_tmu(ced)->pdev->dev);
380}
381
Magnus Damm9570ef22009-05-01 06:51:00 +0000382static void sh_tmu_register_clockevent(struct sh_tmu_priv *p,
383 char *name, unsigned long rating)
384{
385 struct clock_event_device *ced = &p->ced;
386 int ret;
387
388 memset(ced, 0, sizeof(*ced));
389
390 ced->name = name;
391 ced->features = CLOCK_EVT_FEAT_PERIODIC;
392 ced->features |= CLOCK_EVT_FEAT_ONESHOT;
393 ced->rating = rating;
394 ced->cpumask = cpumask_of(0);
395 ced->set_next_event = sh_tmu_clock_event_next;
396 ced->set_mode = sh_tmu_clock_event_mode;
Rafael J. Wysockieaa49a82012-08-06 01:41:20 +0200397 ced->suspend = sh_tmu_clock_event_suspend;
398 ced->resume = sh_tmu_clock_event_resume;
Magnus Damm9570ef22009-05-01 06:51:00 +0000399
Paul Mundt214a6072010-03-10 16:26:25 +0900400 dev_info(&p->pdev->dev, "used for clock events\n");
Paul Mundt39774072012-06-11 17:10:16 +0900401
402 clockevents_config_and_register(ced, 1, 0x300, 0xffffffff);
Paul Mundtda64c2a2010-02-25 16:37:46 +0900403
Magnus Damm9570ef22009-05-01 06:51:00 +0000404 ret = setup_irq(p->irqaction.irq, &p->irqaction);
405 if (ret) {
Paul Mundt214a6072010-03-10 16:26:25 +0900406 dev_err(&p->pdev->dev, "failed to request irq %d\n",
407 p->irqaction.irq);
Magnus Damm9570ef22009-05-01 06:51:00 +0000408 return;
409 }
Magnus Damm9570ef22009-05-01 06:51:00 +0000410}
411
412static int sh_tmu_register(struct sh_tmu_priv *p, char *name,
413 unsigned long clockevent_rating,
414 unsigned long clocksource_rating)
415{
416 if (clockevent_rating)
417 sh_tmu_register_clockevent(p, name, clockevent_rating);
418 else if (clocksource_rating)
419 sh_tmu_register_clocksource(p, name, clocksource_rating);
420
421 return 0;
422}
423
424static int sh_tmu_setup(struct sh_tmu_priv *p, struct platform_device *pdev)
425{
Paul Mundt46a12f72009-05-03 17:57:17 +0900426 struct sh_timer_config *cfg = pdev->dev.platform_data;
Magnus Damm9570ef22009-05-01 06:51:00 +0000427 struct resource *res;
428 int irq, ret;
429 ret = -ENXIO;
430
431 memset(p, 0, sizeof(*p));
432 p->pdev = pdev;
433
434 if (!cfg) {
435 dev_err(&p->pdev->dev, "missing platform data\n");
436 goto err0;
437 }
438
439 platform_set_drvdata(pdev, p);
440
441 res = platform_get_resource(p->pdev, IORESOURCE_MEM, 0);
442 if (!res) {
443 dev_err(&p->pdev->dev, "failed to get I/O memory\n");
444 goto err0;
445 }
446
447 irq = platform_get_irq(p->pdev, 0);
448 if (irq < 0) {
449 dev_err(&p->pdev->dev, "failed to get irq\n");
450 goto err0;
451 }
452
453 /* map memory, let mapbase point to our channel */
454 p->mapbase = ioremap_nocache(res->start, resource_size(res));
455 if (p->mapbase == NULL) {
Paul Mundt214a6072010-03-10 16:26:25 +0900456 dev_err(&p->pdev->dev, "failed to remap I/O memory\n");
Magnus Damm9570ef22009-05-01 06:51:00 +0000457 goto err0;
458 }
459
460 /* setup data for setup_irq() (too early for request_irq()) */
Paul Mundt214a6072010-03-10 16:26:25 +0900461 p->irqaction.name = dev_name(&p->pdev->dev);
Magnus Damm9570ef22009-05-01 06:51:00 +0000462 p->irqaction.handler = sh_tmu_interrupt;
463 p->irqaction.dev_id = p;
464 p->irqaction.irq = irq;
Paul Mundtfecf0662010-04-15 11:59:28 +0900465 p->irqaction.flags = IRQF_DISABLED | IRQF_TIMER | \
466 IRQF_IRQPOLL | IRQF_NOBALANCING;
Magnus Damm9570ef22009-05-01 06:51:00 +0000467
468 /* get hold of clock */
Paul Mundtc2a25e82010-03-29 16:55:43 +0900469 p->clk = clk_get(&p->pdev->dev, "tmu_fck");
Magnus Damm9570ef22009-05-01 06:51:00 +0000470 if (IS_ERR(p->clk)) {
Magnus Damm03ff8582010-10-13 07:36:38 +0000471 dev_err(&p->pdev->dev, "cannot get clock\n");
472 ret = PTR_ERR(p->clk);
473 goto err1;
Magnus Damm9570ef22009-05-01 06:51:00 +0000474 }
Rafael J. Wysocki61a53bf2012-08-06 01:48:17 +0200475 p->cs_enabled = false;
476 p->enable_count = 0;
Magnus Damm9570ef22009-05-01 06:51:00 +0000477
Paul Mundt214a6072010-03-10 16:26:25 +0900478 return sh_tmu_register(p, (char *)dev_name(&p->pdev->dev),
Magnus Damm9570ef22009-05-01 06:51:00 +0000479 cfg->clockevent_rating,
480 cfg->clocksource_rating);
481 err1:
482 iounmap(p->mapbase);
483 err0:
484 return ret;
485}
486
Greg Kroah-Hartman18505142012-12-21 15:11:38 -0800487static int sh_tmu_probe(struct platform_device *pdev)
Magnus Damm9570ef22009-05-01 06:51:00 +0000488{
489 struct sh_tmu_priv *p = platform_get_drvdata(pdev);
Rafael J. Wysocki61a53bf2012-08-06 01:48:17 +0200490 struct sh_timer_config *cfg = pdev->dev.platform_data;
Magnus Damm9570ef22009-05-01 06:51:00 +0000491 int ret;
492
Rafael J. Wysockieaa49a82012-08-06 01:41:20 +0200493 if (!is_early_platform_device(pdev)) {
Rafael J. Wysocki61a53bf2012-08-06 01:48:17 +0200494 pm_runtime_set_active(&pdev->dev);
495 pm_runtime_enable(&pdev->dev);
Rafael J. Wysockieaa49a82012-08-06 01:41:20 +0200496 }
Rafael J. Wysocki2ee619f2012-03-13 22:40:00 +0100497
Magnus Damm9570ef22009-05-01 06:51:00 +0000498 if (p) {
Paul Mundt214a6072010-03-10 16:26:25 +0900499 dev_info(&pdev->dev, "kept as earlytimer\n");
Rafael J. Wysocki61a53bf2012-08-06 01:48:17 +0200500 goto out;
Magnus Damm9570ef22009-05-01 06:51:00 +0000501 }
502
503 p = kmalloc(sizeof(*p), GFP_KERNEL);
504 if (p == NULL) {
505 dev_err(&pdev->dev, "failed to allocate driver data\n");
506 return -ENOMEM;
507 }
508
509 ret = sh_tmu_setup(p, pdev);
510 if (ret) {
511 kfree(p);
512 platform_set_drvdata(pdev, NULL);
Rafael J. Wysocki61a53bf2012-08-06 01:48:17 +0200513 pm_runtime_idle(&pdev->dev);
514 return ret;
Magnus Damm9570ef22009-05-01 06:51:00 +0000515 }
Rafael J. Wysocki61a53bf2012-08-06 01:48:17 +0200516 if (is_early_platform_device(pdev))
517 return 0;
518
519 out:
520 if (cfg->clockevent_rating || cfg->clocksource_rating)
521 pm_runtime_irq_safe(&pdev->dev);
522 else
523 pm_runtime_idle(&pdev->dev);
524
525 return 0;
Magnus Damm9570ef22009-05-01 06:51:00 +0000526}
527
Greg Kroah-Hartman18505142012-12-21 15:11:38 -0800528static int sh_tmu_remove(struct platform_device *pdev)
Magnus Damm9570ef22009-05-01 06:51:00 +0000529{
530 return -EBUSY; /* cannot unregister clockevent and clocksource */
531}
532
533static struct platform_driver sh_tmu_device_driver = {
534 .probe = sh_tmu_probe,
Greg Kroah-Hartman18505142012-12-21 15:11:38 -0800535 .remove = sh_tmu_remove,
Magnus Damm9570ef22009-05-01 06:51:00 +0000536 .driver = {
537 .name = "sh_tmu",
538 }
539};
540
541static int __init sh_tmu_init(void)
542{
543 return platform_driver_register(&sh_tmu_device_driver);
544}
545
546static void __exit sh_tmu_exit(void)
547{
548 platform_driver_unregister(&sh_tmu_device_driver);
549}
550
551early_platform_init("earlytimer", &sh_tmu_device_driver);
Simon Hormanb9773c32013-03-05 15:40:42 +0900552subsys_initcall(sh_tmu_init);
Magnus Damm9570ef22009-05-01 06:51:00 +0000553module_exit(sh_tmu_exit);
554
555MODULE_AUTHOR("Magnus Damm");
556MODULE_DESCRIPTION("SuperH TMU Timer Driver");
557MODULE_LICENSE("GPL v2");