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libata: fix Seagate NCQ+FLUSH blacklist
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / mfd / tc6393xb.c
blobe4c1c788b5f81ffb912bcc96a7630904e036a26c
1 /*
2 * Toshiba TC6393XB SoC support
3 *
4 * Copyright(c) 2005-2006 Chris Humbert
5 * Copyright(c) 2005 Dirk Opfer
6 * Copyright(c) 2005 Ian Molton <spyro@f2s.com>
7 * Copyright(c) 2007 Dmitry Baryshkov
8 *
9 * Based on code written by Sharp/Lineo for 2.4 kernels
10 * Based on locomo.c
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
15 */
16
17 #include <linux/kernel.h>
18 #include <linux/module.h>
19 #include <linux/io.h>
20 #include <linux/irq.h>
21 #include <linux/platform_device.h>
22 #include <linux/clk.h>
23 #include <linux/err.h>
24 #include <linux/mfd/core.h>
25 #include <linux/mfd/tmio.h>
26 #include <linux/mfd/tc6393xb.h>
27 #include <linux/gpio.h>
28
29 #define SCR_REVID 0x08 /* b Revision ID */
30 #define SCR_ISR 0x50 /* b Interrupt Status */
31 #define SCR_IMR 0x52 /* b Interrupt Mask */
32 #define SCR_IRR 0x54 /* b Interrupt Routing */
33 #define SCR_GPER 0x60 /* w GP Enable */
34 #define SCR_GPI_SR(i) (0x64 + (i)) /* b3 GPI Status */
35 #define SCR_GPI_IMR(i) (0x68 + (i)) /* b3 GPI INT Mask */
36 #define SCR_GPI_EDER(i) (0x6c + (i)) /* b3 GPI Edge Detect Enable */
37 #define SCR_GPI_LIR(i) (0x70 + (i)) /* b3 GPI Level Invert */
38 #define SCR_GPO_DSR(i) (0x78 + (i)) /* b3 GPO Data Set */
39 #define SCR_GPO_DOECR(i) (0x7c + (i)) /* b3 GPO Data OE Control */
40 #define SCR_GP_IARCR(i) (0x80 + (i)) /* b3 GP Internal Active Register Control */
41 #define SCR_GP_IARLCR(i) (0x84 + (i)) /* b3 GP INTERNAL Active Register Level Control */
42 #define SCR_GPI_BCR(i) (0x88 + (i)) /* b3 GPI Buffer Control */
43 #define SCR_GPA_IARCR 0x8c /* w GPa Internal Active Register Control */
44 #define SCR_GPA_IARLCR 0x90 /* w GPa Internal Active Register Level Control */
45 #define SCR_GPA_BCR 0x94 /* w GPa Buffer Control */
46 #define SCR_CCR 0x98 /* w Clock Control */
47 #define SCR_PLL2CR 0x9a /* w PLL2 Control */
48 #define SCR_PLL1CR 0x9c /* l PLL1 Control */
49 #define SCR_DIARCR 0xa0 /* b Device Internal Active Register Control */
50 #define SCR_DBOCR 0xa1 /* b Device Buffer Off Control */
51 #define SCR_FER 0xe0 /* b Function Enable */
52 #define SCR_MCR 0xe4 /* w Mode Control */
53 #define SCR_CONFIG 0xfc /* b Configuration Control */
54 #define SCR_DEBUG 0xff /* b Debug */
55
56 #define SCR_CCR_CK32K BIT(0)
57 #define SCR_CCR_USBCK BIT(1)
58 #define SCR_CCR_UNK1 BIT(4)
59 #define SCR_CCR_MCLK_MASK (7 << 8)
60 #define SCR_CCR_MCLK_OFF (0 << 8)
61 #define SCR_CCR_MCLK_12 (1 << 8)
62 #define SCR_CCR_MCLK_24 (2 << 8)
63 #define SCR_CCR_MCLK_48 (3 << 8)
64 #define SCR_CCR_HCLK_MASK (3 << 12)
65 #define SCR_CCR_HCLK_24 (0 << 12)
66 #define SCR_CCR_HCLK_48 (1 << 12)
67
68 #define SCR_FER_USBEN BIT(0) /* USB host enable */
69 #define SCR_FER_LCDCVEN BIT(1) /* polysilicon TFT enable */
70 #define SCR_FER_SLCDEN BIT(2) /* SLCD enable */
71
72 #define SCR_MCR_RDY_MASK (3 << 0)
73 #define SCR_MCR_RDY_OPENDRAIN (0 << 0)
74 #define SCR_MCR_RDY_TRISTATE (1 << 0)
75 #define SCR_MCR_RDY_PUSHPULL (2 << 0)
76 #define SCR_MCR_RDY_UNK BIT(2)
77 #define SCR_MCR_RDY_EN BIT(3)
78 #define SCR_MCR_INT_MASK (3 << 4)
79 #define SCR_MCR_INT_OPENDRAIN (0 << 4)
80 #define SCR_MCR_INT_TRISTATE (1 << 4)
81 #define SCR_MCR_INT_PUSHPULL (2 << 4)
82 #define SCR_MCR_INT_UNK BIT(6)
83 #define SCR_MCR_INT_EN BIT(7)
84 /* bits 8 - 16 are unknown */
85
86 #define TC_GPIO_BIT(i) (1 << (i & 0x7))
87
88 /*--------------------------------------------------------------------------*/
89
90 struct tc6393xb {
91 void __iomem *scr;
92
93 struct gpio_chip gpio;
94
95 struct clk *clk; /* 3,6 Mhz */
96
97 spinlock_t lock; /* protects RMW cycles */
98
99 struct {
100 u8 fer;
101 u16 ccr;
102 u8 gpi_bcr[3];
103 u8 gpo_dsr[3];
104 u8 gpo_doecr[3];
105 } suspend_state;
106
107 struct resource rscr;
108 struct resource *iomem;
109 int irq;
110 int irq_base;
111 };
112
113 enum {
114 TC6393XB_CELL_NAND,
115 TC6393XB_CELL_MMC,
116 };
117
118 /*--------------------------------------------------------------------------*/
119
120 static int tc6393xb_nand_enable(struct platform_device *nand)
121 {
122 struct platform_device *dev = to_platform_device(nand->dev.parent);
123 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
124 unsigned long flags;
125
126 spin_lock_irqsave(&tc6393xb->lock, flags);
127
128 /* SMD buffer on */
129 dev_dbg(&dev->dev, "SMD buffer on\n");
130 tmio_iowrite8(0xff, tc6393xb->scr + SCR_GPI_BCR(1));
131
132 spin_unlock_irqrestore(&tc6393xb->lock, flags);
133
134 return 0;
135 }
136
137 static struct resource __devinitdata tc6393xb_nand_resources[] = {
138 {
139 .start = 0x1000,
140 .end = 0x1007,
141 .flags = IORESOURCE_MEM,
142 },
143 {
144 .start = 0x0100,
145 .end = 0x01ff,
146 .flags = IORESOURCE_MEM,
147 },
148 {
149 .start = IRQ_TC6393_NAND,
150 .end = IRQ_TC6393_NAND,
151 .flags = IORESOURCE_IRQ,
152 },
153 };
154
155 static struct resource __devinitdata tc6393xb_mmc_resources[] = {
156 {
157 .start = 0x800,
158 .end = 0x9ff,
159 .flags = IORESOURCE_MEM,
160 },
161 {
162 .start = 0x200,
163 .end = 0x2ff,
164 .flags = IORESOURCE_MEM,
165 },
166 {
167 .start = IRQ_TC6393_MMC,
168 .end = IRQ_TC6393_MMC,
169 .flags = IORESOURCE_IRQ,
170 },
171 };
172
173 static struct mfd_cell __devinitdata tc6393xb_cells[] = {
174 [TC6393XB_CELL_NAND] = {
175 .name = "tmio-nand",
176 .enable = tc6393xb_nand_enable,
177 .num_resources = ARRAY_SIZE(tc6393xb_nand_resources),
178 .resources = tc6393xb_nand_resources,
179 },
180 [TC6393XB_CELL_MMC] = {
181 .name = "tmio-mmc",
182 .num_resources = ARRAY_SIZE(tc6393xb_mmc_resources),
183 .resources = tc6393xb_mmc_resources,
184 },
185 };
186
187 /*--------------------------------------------------------------------------*/
188
189 static int tc6393xb_gpio_get(struct gpio_chip *chip,
190 unsigned offset)
191 {
192 struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
193
194 /* XXX: does dsr also represent inputs? */
195 return tmio_ioread8(tc6393xb->scr + SCR_GPO_DSR(offset / 8))
196 & TC_GPIO_BIT(offset);
197 }
198
199 static void __tc6393xb_gpio_set(struct gpio_chip *chip,
200 unsigned offset, int value)
201 {
202 struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
203 u8 dsr;
204
205 dsr = tmio_ioread8(tc6393xb->scr + SCR_GPO_DSR(offset / 8));
206 if (value)
207 dsr |= TC_GPIO_BIT(offset);
208 else
209 dsr &= ~TC_GPIO_BIT(offset);
210
211 tmio_iowrite8(dsr, tc6393xb->scr + SCR_GPO_DSR(offset / 8));
212 }
213
214 static void tc6393xb_gpio_set(struct gpio_chip *chip,
215 unsigned offset, int value)
216 {
217 struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
218 unsigned long flags;
219
220 spin_lock_irqsave(&tc6393xb->lock, flags);
221
222 __tc6393xb_gpio_set(chip, offset, value);
223
224 spin_unlock_irqrestore(&tc6393xb->lock, flags);
225 }
226
227 static int tc6393xb_gpio_direction_input(struct gpio_chip *chip,
228 unsigned offset)
229 {
230 struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
231 unsigned long flags;
232 u8 doecr;
233
234 spin_lock_irqsave(&tc6393xb->lock, flags);
235
236 doecr = tmio_ioread8(tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
237 doecr &= ~TC_GPIO_BIT(offset);
238 tmio_iowrite8(doecr, tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
239
240 spin_unlock_irqrestore(&tc6393xb->lock, flags);
241
242 return 0;
243 }
244
245 static int tc6393xb_gpio_direction_output(struct gpio_chip *chip,
246 unsigned offset, int value)
247 {
248 struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
249 unsigned long flags;
250 u8 doecr;
251
252 spin_lock_irqsave(&tc6393xb->lock, flags);
253
254 __tc6393xb_gpio_set(chip, offset, value);
255
256 doecr = tmio_ioread8(tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
257 doecr |= TC_GPIO_BIT(offset);
258 tmio_iowrite8(doecr, tc6393xb->scr + SCR_GPO_DOECR(offset / 8));
259
260 spin_unlock_irqrestore(&tc6393xb->lock, flags);
261
262 return 0;
263 }
264
265 static int tc6393xb_register_gpio(struct tc6393xb *tc6393xb, int gpio_base)
266 {
267 tc6393xb->gpio.label = "tc6393xb";
268 tc6393xb->gpio.base = gpio_base;
269 tc6393xb->gpio.ngpio = 16;
270 tc6393xb->gpio.set = tc6393xb_gpio_set;
271 tc6393xb->gpio.get = tc6393xb_gpio_get;
272 tc6393xb->gpio.direction_input = tc6393xb_gpio_direction_input;
273 tc6393xb->gpio.direction_output = tc6393xb_gpio_direction_output;
274
275 return gpiochip_add(&tc6393xb->gpio);
276 }
277
278 /*--------------------------------------------------------------------------*/
279
280 static void
281 tc6393xb_irq(unsigned int irq, struct irq_desc *desc)
282 {
283 struct tc6393xb *tc6393xb = get_irq_data(irq);
284 unsigned int isr;
285 unsigned int i, irq_base;
286
287 irq_base = tc6393xb->irq_base;
288
289 while ((isr = tmio_ioread8(tc6393xb->scr + SCR_ISR) &
290 ~tmio_ioread8(tc6393xb->scr + SCR_IMR)))
291 for (i = 0; i < TC6393XB_NR_IRQS; i++) {
292 if (isr & (1 << i))
293 generic_handle_irq(irq_base + i);
294 }
295 }
296
297 static void tc6393xb_irq_ack(unsigned int irq)
298 {
299 }
300
301 static void tc6393xb_irq_mask(unsigned int irq)
302 {
303 struct tc6393xb *tc6393xb = get_irq_chip_data(irq);
304 unsigned long flags;
305 u8 imr;
306
307 spin_lock_irqsave(&tc6393xb->lock, flags);
308 imr = tmio_ioread8(tc6393xb->scr + SCR_IMR);
309 imr |= 1 << (irq - tc6393xb->irq_base);
310 tmio_iowrite8(imr, tc6393xb->scr + SCR_IMR);
311 spin_unlock_irqrestore(&tc6393xb->lock, flags);
312 }
313
314 static void tc6393xb_irq_unmask(unsigned int irq)
315 {
316 struct tc6393xb *tc6393xb = get_irq_chip_data(irq);
317 unsigned long flags;
318 u8 imr;
319
320 spin_lock_irqsave(&tc6393xb->lock, flags);
321 imr = tmio_ioread8(tc6393xb->scr + SCR_IMR);
322 imr &= ~(1 << (irq - tc6393xb->irq_base));
323 tmio_iowrite8(imr, tc6393xb->scr + SCR_IMR);
324 spin_unlock_irqrestore(&tc6393xb->lock, flags);
325 }
326
327 static struct irq_chip tc6393xb_chip = {
328 .name = "tc6393xb",
329 .ack = tc6393xb_irq_ack,
330 .mask = tc6393xb_irq_mask,
331 .unmask = tc6393xb_irq_unmask,
332 };
333
334 static void tc6393xb_attach_irq(struct platform_device *dev)
335 {
336 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
337 unsigned int irq, irq_base;
338
339 irq_base = tc6393xb->irq_base;
340
341 for (irq = irq_base; irq < irq_base + TC6393XB_NR_IRQS; irq++) {
342 set_irq_chip(irq, &tc6393xb_chip);
343 set_irq_chip_data(irq, tc6393xb);
344 set_irq_handler(irq, handle_edge_irq);
345 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
346 }
347
348 set_irq_type(tc6393xb->irq, IRQ_TYPE_EDGE_FALLING);
349 set_irq_data(tc6393xb->irq, tc6393xb);
350 set_irq_chained_handler(tc6393xb->irq, tc6393xb_irq);
351 }
352
353 static void tc6393xb_detach_irq(struct platform_device *dev)
354 {
355 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
356 unsigned int irq, irq_base;
357
358 set_irq_chained_handler(tc6393xb->irq, NULL);
359 set_irq_data(tc6393xb->irq, NULL);
360
361 irq_base = tc6393xb->irq_base;
362
363 for (irq = irq_base; irq < irq_base + TC6393XB_NR_IRQS; irq++) {
364 set_irq_flags(irq, 0);
365 set_irq_chip(irq, NULL);
366 set_irq_chip_data(irq, NULL);
367 }
368 }
369
370 /*--------------------------------------------------------------------------*/
371
372 static int tc6393xb_hw_init(struct platform_device *dev)
373 {
374 struct tc6393xb_platform_data *tcpd = dev->dev.platform_data;
375 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
376 int i;
377
378 iowrite8(tc6393xb->suspend_state.fer, tc6393xb->scr + SCR_FER);
379 iowrite16(tcpd->scr_pll2cr, tc6393xb->scr + SCR_PLL2CR);
380 iowrite16(tc6393xb->suspend_state.ccr, tc6393xb->scr + SCR_CCR);
381 iowrite16(SCR_MCR_RDY_OPENDRAIN | SCR_MCR_RDY_UNK | SCR_MCR_RDY_EN |
382 SCR_MCR_INT_OPENDRAIN | SCR_MCR_INT_UNK | SCR_MCR_INT_EN |
383 BIT(15), tc6393xb->scr + SCR_MCR);
384 iowrite16(tcpd->scr_gper, tc6393xb->scr + SCR_GPER);
385 iowrite8(0, tc6393xb->scr + SCR_IRR);
386 iowrite8(0xbf, tc6393xb->scr + SCR_IMR);
387
388 for (i = 0; i < 3; i++) {
389 iowrite8(tc6393xb->suspend_state.gpo_dsr[i],
390 tc6393xb->scr + SCR_GPO_DSR(i));
391 iowrite8(tc6393xb->suspend_state.gpo_doecr[i],
392 tc6393xb->scr + SCR_GPO_DOECR(i));
393 iowrite8(tc6393xb->suspend_state.gpi_bcr[i],
394 tc6393xb->scr + SCR_GPI_BCR(i));
395 }
396
397 return 0;
398 }
399
400 static int __devinit tc6393xb_probe(struct platform_device *dev)
401 {
402 struct tc6393xb_platform_data *tcpd = dev->dev.platform_data;
403 struct tc6393xb *tc6393xb;
404 struct resource *iomem, *rscr;
405 int ret, temp;
406 int i;
407
408 iomem = platform_get_resource(dev, IORESOURCE_MEM, 0);
409 if (!iomem)
410 return -EINVAL;
411
412 tc6393xb = kzalloc(sizeof *tc6393xb, GFP_KERNEL);
413 if (!tc6393xb) {
414 ret = -ENOMEM;
415 goto err_kzalloc;
416 }
417
418 spin_lock_init(&tc6393xb->lock);
419
420 platform_set_drvdata(dev, tc6393xb);
421
422 ret = platform_get_irq(dev, 0);
423 if (ret >= 0)
424 tc6393xb->irq = ret;
425 else
426 goto err_noirq;
427
428 tc6393xb->iomem = iomem;
429 tc6393xb->irq_base = tcpd->irq_base;
430
431 tc6393xb->clk = clk_get(&dev->dev, "CLK_CK3P6MI");
432 if (IS_ERR(tc6393xb->clk)) {
433 ret = PTR_ERR(tc6393xb->clk);
434 goto err_clk_get;
435 }
436
437 rscr = &tc6393xb->rscr;
438 rscr->name = "tc6393xb-core";
439 rscr->start = iomem->start;
440 rscr->end = iomem->start + 0xff;
441 rscr->flags = IORESOURCE_MEM;
442
443 ret = request_resource(iomem, rscr);
444 if (ret)
445 goto err_request_scr;
446
447 tc6393xb->scr = ioremap(rscr->start, rscr->end - rscr->start + 1);
448 if (!tc6393xb->scr) {
449 ret = -ENOMEM;
450 goto err_ioremap;
451 }
452
453 ret = clk_enable(tc6393xb->clk);
454 if (ret)
455 goto err_clk_enable;
456
457 ret = tcpd->enable(dev);
458 if (ret)
459 goto err_enable;
460
461 tc6393xb->suspend_state.fer = 0;
462
463 for (i = 0; i < 3; i++) {
464 tc6393xb->suspend_state.gpo_dsr[i] =
465 (tcpd->scr_gpo_dsr >> (8 * i)) & 0xff;
466 tc6393xb->suspend_state.gpo_doecr[i] =
467 (tcpd->scr_gpo_doecr >> (8 * i)) & 0xff;
468 }
469
470 tc6393xb->suspend_state.ccr = SCR_CCR_UNK1 |
471 SCR_CCR_HCLK_48;
472
473 ret = tc6393xb_hw_init(dev);
474 if (ret)
475 goto err_hw_init;
476
477 printk(KERN_INFO "Toshiba tc6393xb revision %d at 0x%08lx, irq %d\n",
478 tmio_ioread8(tc6393xb->scr + SCR_REVID),
479 (unsigned long) iomem->start, tc6393xb->irq);
480
481 tc6393xb->gpio.base = -1;
482
483 if (tcpd->gpio_base >= 0) {
484 ret = tc6393xb_register_gpio(tc6393xb, tcpd->gpio_base);
485 if (ret)
486 goto err_gpio_add;
487 }
488
489 tc6393xb_attach_irq(dev);
490
491 tc6393xb_cells[TC6393XB_CELL_NAND].driver_data = tcpd->nand_data;
492 tc6393xb_cells[TC6393XB_CELL_NAND].platform_data =
493 &tc6393xb_cells[TC6393XB_CELL_NAND];
494 tc6393xb_cells[TC6393XB_CELL_NAND].data_size =
495 sizeof(tc6393xb_cells[TC6393XB_CELL_NAND]);
496 tc6393xb_cells[TC6393XB_CELL_MMC].platform_data =
497 &tc6393xb_cells[TC6393XB_CELL_MMC];
498 tc6393xb_cells[TC6393XB_CELL_MMC].data_size =
499 sizeof(tc6393xb_cells[TC6393XB_CELL_MMC]);
500
501
502 ret = mfd_add_devices(&dev->dev, dev->id,
503 tc6393xb_cells, ARRAY_SIZE(tc6393xb_cells),
504 iomem, tcpd->irq_base);
505
506 if (!ret)
507 return 0;
508
509 tc6393xb_detach_irq(dev);
510
511 err_gpio_add:
512 if (tc6393xb->gpio.base != -1)
513 temp = gpiochip_remove(&tc6393xb->gpio);
514 err_hw_init:
515 tcpd->disable(dev);
516 err_clk_enable:
517 clk_disable(tc6393xb->clk);
518 err_enable:
519 iounmap(tc6393xb->scr);
520 err_ioremap:
521 release_resource(&tc6393xb->rscr);
522 err_request_scr:
523 clk_put(tc6393xb->clk);
524 err_noirq:
525 err_clk_get:
526 kfree(tc6393xb);
527 err_kzalloc:
528 return ret;
529 }
530
531 static int __devexit tc6393xb_remove(struct platform_device *dev)
532 {
533 struct tc6393xb_platform_data *tcpd = dev->dev.platform_data;
534 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
535 int ret;
536
537 mfd_remove_devices(&dev->dev);
538 tc6393xb_detach_irq(dev);
539
540 if (tc6393xb->gpio.base != -1) {
541 ret = gpiochip_remove(&tc6393xb->gpio);
542 if (ret) {
543 dev_err(&dev->dev, "Can't remove gpio chip: %d\n", ret);
544 return ret;
545 }
546 }
547
548 ret = tcpd->disable(dev);
549 clk_disable(tc6393xb->clk);
550 iounmap(tc6393xb->scr);
551 release_resource(&tc6393xb->rscr);
552 platform_set_drvdata(dev, NULL);
553 clk_put(tc6393xb->clk);
554 kfree(tc6393xb);
555
556 return ret;
557 }
558
559 #ifdef CONFIG_PM
560 static int tc6393xb_suspend(struct platform_device *dev, pm_message_t state)
561 {
562 struct tc6393xb_platform_data *tcpd = dev->dev.platform_data;
563 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
564 int i, ret;
565
566 tc6393xb->suspend_state.ccr = ioread16(tc6393xb->scr + SCR_CCR);
567 tc6393xb->suspend_state.fer = ioread8(tc6393xb->scr + SCR_FER);
568
569 for (i = 0; i < 3; i++) {
570 tc6393xb->suspend_state.gpo_dsr[i] =
571 ioread8(tc6393xb->scr + SCR_GPO_DSR(i));
572 tc6393xb->suspend_state.gpo_doecr[i] =
573 ioread8(tc6393xb->scr + SCR_GPO_DOECR(i));
574 tc6393xb->suspend_state.gpi_bcr[i] =
575 ioread8(tc6393xb->scr + SCR_GPI_BCR(i));
576 }
577 ret = tcpd->suspend(dev);
578 clk_disable(tc6393xb->clk);
579
580 return ret;
581 }
582
583 static int tc6393xb_resume(struct platform_device *dev)
584 {
585 struct tc6393xb_platform_data *tcpd = dev->dev.platform_data;
586 struct tc6393xb *tc6393xb = platform_get_drvdata(dev);
587 int ret;
588
589 clk_enable(tc6393xb->clk);
590
591 ret = tcpd->resume(dev);
592
593 if (ret)
594 return ret;
595
596 return tc6393xb_hw_init(dev);
597 }
598 #else
599 #define tc6393xb_suspend NULL
600 #define tc6393xb_resume NULL
601 #endif
602
603 static struct platform_driver tc6393xb_driver = {
604 .probe = tc6393xb_probe,
605 .remove = __devexit_p(tc6393xb_remove),
606 .suspend = tc6393xb_suspend,
607 .resume = tc6393xb_resume,
608
609 .driver = {
610 .name = "tc6393xb",
611 .owner = THIS_MODULE,
612 },
613 };
614
615 static int __init tc6393xb_init(void)
616 {
617 return platform_driver_register(&tc6393xb_driver);
618 }
619
620 static void __exit tc6393xb_exit(void)
621 {
622 platform_driver_unregister(&tc6393xb_driver);
623 }
624
625 subsys_initcall(tc6393xb_init);
626 module_exit(tc6393xb_exit);
627
628 MODULE_LICENSE("GPL v2");
629 MODULE_AUTHOR("Ian Molton, Dmitry Baryshkov and Dirk Opfer");
630 MODULE_DESCRIPTION("tc6393xb Toshiba Mobile IO Controller");
631 MODULE_ALIAS("platform:tc6393xb");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree