1 /*
2 * MFD driver for TWL6040 audio device
3 *
4 * Authors: Misael Lopez Cruz <misael.lopez@ti.com>
5 * Jorge Eduardo Candelaria <jorge.candelaria@ti.com>
6 * Peter Ujfalusi <peter.ujfalusi@ti.com>
7 *
8 * Copyright: (C) 2011 Texas Instruments, Inc.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
22 * 02110-1301 USA
23 *
24 */
25
26 #include <linux/module.h>
27 #include <linux/types.h>
28 #include <linux/slab.h>
29 #include <linux/kernel.h>
30 #include <linux/err.h>
31 #include <linux/platform_device.h>
32 #include <linux/of.h>
33 #include <linux/of_irq.h>
34 #include <linux/of_gpio.h>
35 #include <linux/of_platform.h>
36 #include <linux/gpio.h>
37 #include <linux/delay.h>
38 #include <linux/i2c.h>
39 #include <linux/regmap.h>
40 #include <linux/mfd/core.h>
41 #include <linux/mfd/twl6040.h>
42 #include <linux/regulator/consumer.h>
43
44 #define VIBRACTRL_MEMBER(reg) ((reg == TWL6040_REG_VIBCTLL) ? 0 : 1)
45 #define TWL6040_NUM_SUPPLIES (2)
46
47 static const struct reg_default twl6040_defaults[] = {
48 { 0x01, 0x4B }, /* REG_ASICID (ro) */
49 { 0x02, 0x00 }, /* REG_ASICREV (ro) */
50 { 0x03, 0x00 }, /* REG_INTID */
51 { 0x04, 0x00 }, /* REG_INTMR */
52 { 0x05, 0x00 }, /* REG_NCPCTRL */
53 { 0x06, 0x00 }, /* REG_LDOCTL */
54 { 0x07, 0x60 }, /* REG_HPPLLCTL */
55 { 0x08, 0x00 }, /* REG_LPPLLCTL */
56 { 0x09, 0x4A }, /* REG_LPPLLDIV */
57 { 0x0A, 0x00 }, /* REG_AMICBCTL */
58 { 0x0B, 0x00 }, /* REG_DMICBCTL */
59 { 0x0C, 0x00 }, /* REG_MICLCTL */
60 { 0x0D, 0x00 }, /* REG_MICRCTL */
61 { 0x0E, 0x00 }, /* REG_MICGAIN */
62 { 0x0F, 0x1B }, /* REG_LINEGAIN */
63 { 0x10, 0x00 }, /* REG_HSLCTL */
64 { 0x11, 0x00 }, /* REG_HSRCTL */
65 { 0x12, 0x00 }, /* REG_HSGAIN */
66 { 0x13, 0x00 }, /* REG_EARCTL */
67 { 0x14, 0x00 }, /* REG_HFLCTL */
68 { 0x15, 0x00 }, /* REG_HFLGAIN */
69 { 0x16, 0x00 }, /* REG_HFRCTL */
70 { 0x17, 0x00 }, /* REG_HFRGAIN */
71 { 0x18, 0x00 }, /* REG_VIBCTLL */
72 { 0x19, 0x00 }, /* REG_VIBDATL */
73 { 0x1A, 0x00 }, /* REG_VIBCTLR */
74 { 0x1B, 0x00 }, /* REG_VIBDATR */
75 { 0x1C, 0x00 }, /* REG_HKCTL1 */
76 { 0x1D, 0x00 }, /* REG_HKCTL2 */
77 { 0x1E, 0x00 }, /* REG_GPOCTL */
78 { 0x1F, 0x00 }, /* REG_ALB */
79 { 0x20, 0x00 }, /* REG_DLB */
80 /* 0x28, REG_TRIM1 */
81 /* 0x29, REG_TRIM2 */
82 /* 0x2A, REG_TRIM3 */
83 /* 0x2B, REG_HSOTRIM */
84 /* 0x2C, REG_HFOTRIM */
85 { 0x2D, 0x08 }, /* REG_ACCCTL */
86 { 0x2E, 0x00 }, /* REG_STATUS (ro) */
87 };
88
89 static struct reg_sequence twl6040_patch[] = {
90 /*
91 * Select I2C bus access to dual access registers
92 * Interrupt register is cleared on read
93 * Select fast mode for i2c (400KHz)
94 */
95 { TWL6040_REG_ACCCTL,
96 TWL6040_I2CSEL | TWL6040_INTCLRMODE | TWL6040_I2CMODE(1) },
97 };
98
99
twl6040_has_vibra(struct device_node * parent)100 static bool twl6040_has_vibra(struct device_node *parent)
101 {
102 struct device_node *node;
103
104 node = of_get_child_by_name(parent, "vibra");
105 if (node) {
106 of_node_put(node);
107 return true;
108 }
109
110 return false;
111 }
112
twl6040_reg_read(struct twl6040 * twl6040,unsigned int reg)113 int twl6040_reg_read(struct twl6040 *twl6040, unsigned int reg)
114 {
115 int ret;
116 unsigned int val;
117
118 ret = regmap_read(twl6040->regmap, reg, &val);
119 if (ret < 0)
120 return ret;
121
122 return val;
123 }
124 EXPORT_SYMBOL(twl6040_reg_read);
125
twl6040_reg_write(struct twl6040 * twl6040,unsigned int reg,u8 val)126 int twl6040_reg_write(struct twl6040 *twl6040, unsigned int reg, u8 val)
127 {
128 int ret;
129
130 ret = regmap_write(twl6040->regmap, reg, val);
131
132 return ret;
133 }
134 EXPORT_SYMBOL(twl6040_reg_write);
135
twl6040_set_bits(struct twl6040 * twl6040,unsigned int reg,u8 mask)136 int twl6040_set_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
137 {
138 return regmap_update_bits(twl6040->regmap, reg, mask, mask);
139 }
140 EXPORT_SYMBOL(twl6040_set_bits);
141
twl6040_clear_bits(struct twl6040 * twl6040,unsigned int reg,u8 mask)142 int twl6040_clear_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
143 {
144 return regmap_update_bits(twl6040->regmap, reg, mask, 0);
145 }
146 EXPORT_SYMBOL(twl6040_clear_bits);
147
148 /* twl6040 codec manual power-up sequence */
twl6040_power_up_manual(struct twl6040 * twl6040)149 static int twl6040_power_up_manual(struct twl6040 *twl6040)
150 {
151 u8 ldoctl, ncpctl, lppllctl;
152 int ret;
153
154 /* enable high-side LDO, reference system and internal oscillator */
155 ldoctl = TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA;
156 ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
157 if (ret)
158 return ret;
159 usleep_range(10000, 10500);
160
161 /* enable negative charge pump */
162 ncpctl = TWL6040_NCPENA;
163 ret = twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
164 if (ret)
165 goto ncp_err;
166 usleep_range(1000, 1500);
167
168 /* enable low-side LDO */
169 ldoctl |= TWL6040_LSLDOENA;
170 ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
171 if (ret)
172 goto lsldo_err;
173 usleep_range(1000, 1500);
174
175 /* enable low-power PLL */
176 lppllctl = TWL6040_LPLLENA;
177 ret = twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
178 if (ret)
179 goto lppll_err;
180 usleep_range(5000, 5500);
181
182 /* disable internal oscillator */
183 ldoctl &= ~TWL6040_OSCENA;
184 ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
185 if (ret)
186 goto osc_err;
187
188 return 0;
189
190 osc_err:
191 lppllctl &= ~TWL6040_LPLLENA;
192 twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
193 lppll_err:
194 ldoctl &= ~TWL6040_LSLDOENA;
195 twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
196 lsldo_err:
197 ncpctl &= ~TWL6040_NCPENA;
198 twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
199 ncp_err:
200 ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
201 twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
202
203 dev_err(twl6040->dev, "manual power-up failed\n");
204 return ret;
205 }
206
207 /* twl6040 manual power-down sequence */
twl6040_power_down_manual(struct twl6040 * twl6040)208 static void twl6040_power_down_manual(struct twl6040 *twl6040)
209 {
210 u8 ncpctl, ldoctl, lppllctl;
211
212 ncpctl = twl6040_reg_read(twl6040, TWL6040_REG_NCPCTL);
213 ldoctl = twl6040_reg_read(twl6040, TWL6040_REG_LDOCTL);
214 lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
215
216 /* enable internal oscillator */
217 ldoctl |= TWL6040_OSCENA;
218 twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
219 usleep_range(1000, 1500);
220
221 /* disable low-power PLL */
222 lppllctl &= ~TWL6040_LPLLENA;
223 twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
224
225 /* disable low-side LDO */
226 ldoctl &= ~TWL6040_LSLDOENA;
227 twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
228
229 /* disable negative charge pump */
230 ncpctl &= ~TWL6040_NCPENA;
231 twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
232
233 /* disable high-side LDO, reference system and internal oscillator */
234 ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
235 twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
236 }
237
twl6040_readyint_handler(int irq,void * data)238 static irqreturn_t twl6040_readyint_handler(int irq, void *data)
239 {
240 struct twl6040 *twl6040 = data;
241
242 complete(&twl6040->ready);
243
244 return IRQ_HANDLED;
245 }
246
twl6040_thint_handler(int irq,void * data)247 static irqreturn_t twl6040_thint_handler(int irq, void *data)
248 {
249 struct twl6040 *twl6040 = data;
250 u8 status;
251
252 status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS);
253 if (status & TWL6040_TSHUTDET) {
254 dev_warn(twl6040->dev, "Thermal shutdown, powering-off");
255 twl6040_power(twl6040, 0);
256 } else {
257 dev_warn(twl6040->dev, "Leaving thermal shutdown, powering-on");
258 twl6040_power(twl6040, 1);
259 }
260
261 return IRQ_HANDLED;
262 }
263
twl6040_power_up_automatic(struct twl6040 * twl6040)264 static int twl6040_power_up_automatic(struct twl6040 *twl6040)
265 {
266 int time_left;
267
268 gpio_set_value(twl6040->audpwron, 1);
269
270 time_left = wait_for_completion_timeout(&twl6040->ready,
271 msecs_to_jiffies(144));
272 if (!time_left) {
273 u8 intid;
274
275 dev_warn(twl6040->dev, "timeout waiting for READYINT\n");
276 intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID);
277 if (!(intid & TWL6040_READYINT)) {
278 dev_err(twl6040->dev, "automatic power-up failed\n");
279 gpio_set_value(twl6040->audpwron, 0);
280 return -ETIMEDOUT;
281 }
282 }
283
284 return 0;
285 }
286
twl6040_power(struct twl6040 * twl6040,int on)287 int twl6040_power(struct twl6040 *twl6040, int on)
288 {
289 int ret = 0;
290
291 mutex_lock(&twl6040->mutex);
292
293 if (on) {
294 /* already powered-up */
295 if (twl6040->power_count++)
296 goto out;
297
298 ret = clk_prepare_enable(twl6040->clk32k);
299 if (ret) {
300 twl6040->power_count = 0;
301 goto out;
302 }
303
304 /* Allow writes to the chip */
305 regcache_cache_only(twl6040->regmap, false);
306
307 if (gpio_is_valid(twl6040->audpwron)) {
308 /* use automatic power-up sequence */
309 ret = twl6040_power_up_automatic(twl6040);
310 if (ret) {
311 clk_disable_unprepare(twl6040->clk32k);
312 twl6040->power_count = 0;
313 goto out;
314 }
315 } else {
316 /* use manual power-up sequence */
317 ret = twl6040_power_up_manual(twl6040);
318 if (ret) {
319 clk_disable_unprepare(twl6040->clk32k);
320 twl6040->power_count = 0;
321 goto out;
322 }
323 }
324
325 /* Sync with the HW */
326 regcache_sync(twl6040->regmap);
327
328 /* Default PLL configuration after power up */
329 twl6040->pll = TWL6040_SYSCLK_SEL_LPPLL;
330 twl6040->sysclk_rate = 19200000;
331 } else {
332 /* already powered-down */
333 if (!twl6040->power_count) {
334 dev_err(twl6040->dev,
335 "device is already powered-off\n");
336 ret = -EPERM;
337 goto out;
338 }
339
340 if (--twl6040->power_count)
341 goto out;
342
343 if (gpio_is_valid(twl6040->audpwron)) {
344 /* use AUDPWRON line */
345 gpio_set_value(twl6040->audpwron, 0);
346
347 /* power-down sequence latency */
348 usleep_range(500, 700);
349 } else {
350 /* use manual power-down sequence */
351 twl6040_power_down_manual(twl6040);
352 }
353
354 /* Set regmap to cache only and mark it as dirty */
355 regcache_cache_only(twl6040->regmap, true);
356 regcache_mark_dirty(twl6040->regmap);
357
358 twl6040->sysclk_rate = 0;
359
360 if (twl6040->pll == TWL6040_SYSCLK_SEL_HPPLL) {
361 clk_disable_unprepare(twl6040->mclk);
362 twl6040->mclk_rate = 0;
363 }
364
365 clk_disable_unprepare(twl6040->clk32k);
366 }
367
368 out:
369 mutex_unlock(&twl6040->mutex);
370 return ret;
371 }
372 EXPORT_SYMBOL(twl6040_power);
373
twl6040_set_pll(struct twl6040 * twl6040,int pll_id,unsigned int freq_in,unsigned int freq_out)374 int twl6040_set_pll(struct twl6040 *twl6040, int pll_id,
375 unsigned int freq_in, unsigned int freq_out)
376 {
377 u8 hppllctl, lppllctl;
378 int ret = 0;
379
380 mutex_lock(&twl6040->mutex);
381
382 hppllctl = twl6040_reg_read(twl6040, TWL6040_REG_HPPLLCTL);
383 lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
384
385 /* Force full reconfiguration when switching between PLL */
386 if (pll_id != twl6040->pll) {
387 twl6040->sysclk_rate = 0;
388 twl6040->mclk_rate = 0;
389 }
390
391 switch (pll_id) {
392 case TWL6040_SYSCLK_SEL_LPPLL:
393 /* low-power PLL divider */
394 /* Change the sysclk configuration only if it has been canged */
395 if (twl6040->sysclk_rate != freq_out) {
396 switch (freq_out) {
397 case 17640000:
398 lppllctl |= TWL6040_LPLLFIN;
399 break;
400 case 19200000:
401 lppllctl &= ~TWL6040_LPLLFIN;
402 break;
403 default:
404 dev_err(twl6040->dev,
405 "freq_out %d not supported\n",
406 freq_out);
407 ret = -EINVAL;
408 goto pll_out;
409 }
410 twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
411 lppllctl);
412 }
413
414 /* The PLL in use has not been change, we can exit */
415 if (twl6040->pll == pll_id)
416 break;
417
418 switch (freq_in) {
419 case 32768:
420 lppllctl |= TWL6040_LPLLENA;
421 twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
422 lppllctl);
423 mdelay(5);
424 lppllctl &= ~TWL6040_HPLLSEL;
425 twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
426 lppllctl);
427 hppllctl &= ~TWL6040_HPLLENA;
428 twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
429 hppllctl);
430 break;
431 default:
432 dev_err(twl6040->dev,
433 "freq_in %d not supported\n", freq_in);
434 ret = -EINVAL;
435 goto pll_out;
436 }
437
438 clk_disable_unprepare(twl6040->mclk);
439 break;
440 case TWL6040_SYSCLK_SEL_HPPLL:
441 /* high-performance PLL can provide only 19.2 MHz */
442 if (freq_out != 19200000) {
443 dev_err(twl6040->dev,
444 "freq_out %d not supported\n", freq_out);
445 ret = -EINVAL;
446 goto pll_out;
447 }
448
449 if (twl6040->mclk_rate != freq_in) {
450 hppllctl &= ~TWL6040_MCLK_MSK;
451
452 switch (freq_in) {
453 case 12000000:
454 /* PLL enabled, active mode */
455 hppllctl |= TWL6040_MCLK_12000KHZ |
456 TWL6040_HPLLENA;
457 break;
458 case 19200000:
459 /* PLL enabled, bypass mode */
460 hppllctl |= TWL6040_MCLK_19200KHZ |
461 TWL6040_HPLLBP | TWL6040_HPLLENA;
462 break;
463 case 26000000:
464 /* PLL enabled, active mode */
465 hppllctl |= TWL6040_MCLK_26000KHZ |
466 TWL6040_HPLLENA;
467 break;
468 case 38400000:
469 /* PLL enabled, bypass mode */
470 hppllctl |= TWL6040_MCLK_38400KHZ |
471 TWL6040_HPLLBP | TWL6040_HPLLENA;
472 break;
473 default:
474 dev_err(twl6040->dev,
475 "freq_in %d not supported\n", freq_in);
476 ret = -EINVAL;
477 goto pll_out;
478 }
479
480 /* When switching to HPPLL, enable the mclk first */
481 if (pll_id != twl6040->pll)
482 clk_prepare_enable(twl6040->mclk);
483 /*
484 * enable clock slicer to ensure input waveform is
485 * square
486 */
487 hppllctl |= TWL6040_HPLLSQRENA;
488
489 twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
490 hppllctl);
491 usleep_range(500, 700);
492 lppllctl |= TWL6040_HPLLSEL;
493 twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
494 lppllctl);
495 lppllctl &= ~TWL6040_LPLLENA;
496 twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
497 lppllctl);
498
499 twl6040->mclk_rate = freq_in;
500 }
501 break;
502 default:
503 dev_err(twl6040->dev, "unknown pll id %d\n", pll_id);
504 ret = -EINVAL;
505 goto pll_out;
506 }
507
508 twl6040->sysclk_rate = freq_out;
509 twl6040->pll = pll_id;
510
511 pll_out:
512 mutex_unlock(&twl6040->mutex);
513 return ret;
514 }
515 EXPORT_SYMBOL(twl6040_set_pll);
516
twl6040_get_pll(struct twl6040 * twl6040)517 int twl6040_get_pll(struct twl6040 *twl6040)
518 {
519 if (twl6040->power_count)
520 return twl6040->pll;
521 else
522 return -ENODEV;
523 }
524 EXPORT_SYMBOL(twl6040_get_pll);
525
twl6040_get_sysclk(struct twl6040 * twl6040)526 unsigned int twl6040_get_sysclk(struct twl6040 *twl6040)
527 {
528 return twl6040->sysclk_rate;
529 }
530 EXPORT_SYMBOL(twl6040_get_sysclk);
531
532 /* Get the combined status of the vibra control register */
twl6040_get_vibralr_status(struct twl6040 * twl6040)533 int twl6040_get_vibralr_status(struct twl6040 *twl6040)
534 {
535 unsigned int reg;
536 int ret;
537 u8 status;
538
539 ret = regmap_read(twl6040->regmap, TWL6040_REG_VIBCTLL, ®);
540 if (ret != 0)
541 return ret;
542 status = reg;
543
544 ret = regmap_read(twl6040->regmap, TWL6040_REG_VIBCTLR, ®);
545 if (ret != 0)
546 return ret;
547 status |= reg;
548
549 status &= (TWL6040_VIBENA | TWL6040_VIBSEL);
550
551 return status;
552 }
553 EXPORT_SYMBOL(twl6040_get_vibralr_status);
554
555 static struct resource twl6040_vibra_rsrc[] = {
556 {
557 .flags = IORESOURCE_IRQ,
558 },
559 };
560
561 static struct resource twl6040_codec_rsrc[] = {
562 {
563 .flags = IORESOURCE_IRQ,
564 },
565 };
566
twl6040_readable_reg(struct device * dev,unsigned int reg)567 static bool twl6040_readable_reg(struct device *dev, unsigned int reg)
568 {
569 /* Register 0 is not readable */
570 if (!reg)
571 return false;
572 return true;
573 }
574
twl6040_volatile_reg(struct device * dev,unsigned int reg)575 static bool twl6040_volatile_reg(struct device *dev, unsigned int reg)
576 {
577 switch (reg) {
578 case TWL6040_REG_ASICID:
579 case TWL6040_REG_ASICREV:
580 case TWL6040_REG_INTID:
581 case TWL6040_REG_LPPLLCTL:
582 case TWL6040_REG_HPPLLCTL:
583 case TWL6040_REG_STATUS:
584 return true;
585 default:
586 return false;
587 }
588 }
589
twl6040_writeable_reg(struct device * dev,unsigned int reg)590 static bool twl6040_writeable_reg(struct device *dev, unsigned int reg)
591 {
592 switch (reg) {
593 case TWL6040_REG_ASICID:
594 case TWL6040_REG_ASICREV:
595 case TWL6040_REG_STATUS:
596 return false;
597 default:
598 return true;
599 }
600 }
601
602 static const struct regmap_config twl6040_regmap_config = {
603 .reg_bits = 8,
604 .val_bits = 8,
605
606 .reg_defaults = twl6040_defaults,
607 .num_reg_defaults = ARRAY_SIZE(twl6040_defaults),
608
609 .max_register = TWL6040_REG_STATUS, /* 0x2e */
610
611 .readable_reg = twl6040_readable_reg,
612 .volatile_reg = twl6040_volatile_reg,
613 .writeable_reg = twl6040_writeable_reg,
614
615 .cache_type = REGCACHE_RBTREE,
616 .use_single_rw = true,
617 };
618
619 static const struct regmap_irq twl6040_irqs[] = {
620 { .reg_offset = 0, .mask = TWL6040_THINT, },
621 { .reg_offset = 0, .mask = TWL6040_PLUGINT | TWL6040_UNPLUGINT, },
622 { .reg_offset = 0, .mask = TWL6040_HOOKINT, },
623 { .reg_offset = 0, .mask = TWL6040_HFINT, },
624 { .reg_offset = 0, .mask = TWL6040_VIBINT, },
625 { .reg_offset = 0, .mask = TWL6040_READYINT, },
626 };
627
628 static struct regmap_irq_chip twl6040_irq_chip = {
629 .name = "twl6040",
630 .irqs = twl6040_irqs,
631 .num_irqs = ARRAY_SIZE(twl6040_irqs),
632
633 .num_regs = 1,
634 .status_base = TWL6040_REG_INTID,
635 .mask_base = TWL6040_REG_INTMR,
636 };
637
twl6040_probe(struct i2c_client * client,const struct i2c_device_id * id)638 static int twl6040_probe(struct i2c_client *client,
639 const struct i2c_device_id *id)
640 {
641 struct device_node *node = client->dev.of_node;
642 struct twl6040 *twl6040;
643 struct mfd_cell *cell = NULL;
644 int irq, ret, children = 0;
645
646 if (!node) {
647 dev_err(&client->dev, "of node is missing\n");
648 return -EINVAL;
649 }
650
651 /* In order to operate correctly we need valid interrupt config */
652 if (!client->irq) {
653 dev_err(&client->dev, "Invalid IRQ configuration\n");
654 return -EINVAL;
655 }
656
657 twl6040 = devm_kzalloc(&client->dev, sizeof(struct twl6040),
658 GFP_KERNEL);
659 if (!twl6040)
660 return -ENOMEM;
661
662 twl6040->regmap = devm_regmap_init_i2c(client, &twl6040_regmap_config);
663 if (IS_ERR(twl6040->regmap))
664 return PTR_ERR(twl6040->regmap);
665
666 i2c_set_clientdata(client, twl6040);
667
668 twl6040->clk32k = devm_clk_get(&client->dev, "clk32k");
669 if (IS_ERR(twl6040->clk32k)) {
670 if (PTR_ERR(twl6040->clk32k) == -EPROBE_DEFER)
671 return -EPROBE_DEFER;
672 dev_dbg(&client->dev, "clk32k is not handled\n");
673 twl6040->clk32k = NULL;
674 }
675
676 twl6040->mclk = devm_clk_get(&client->dev, "mclk");
677 if (IS_ERR(twl6040->mclk)) {
678 if (PTR_ERR(twl6040->mclk) == -EPROBE_DEFER)
679 return -EPROBE_DEFER;
680 dev_dbg(&client->dev, "mclk is not handled\n");
681 twl6040->mclk = NULL;
682 }
683
684 twl6040->supplies[0].supply = "vio";
685 twl6040->supplies[1].supply = "v2v1";
686 ret = devm_regulator_bulk_get(&client->dev, TWL6040_NUM_SUPPLIES,
687 twl6040->supplies);
688 if (ret != 0) {
689 dev_err(&client->dev, "Failed to get supplies: %d\n", ret);
690 return ret;
691 }
692
693 ret = regulator_bulk_enable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
694 if (ret != 0) {
695 dev_err(&client->dev, "Failed to enable supplies: %d\n", ret);
696 return ret;
697 }
698
699 twl6040->dev = &client->dev;
700 twl6040->irq = client->irq;
701
702 mutex_init(&twl6040->mutex);
703 init_completion(&twl6040->ready);
704
705 regmap_register_patch(twl6040->regmap, twl6040_patch,
706 ARRAY_SIZE(twl6040_patch));
707
708 twl6040->rev = twl6040_reg_read(twl6040, TWL6040_REG_ASICREV);
709 if (twl6040->rev < 0) {
710 dev_err(&client->dev, "Failed to read revision register: %d\n",
711 twl6040->rev);
712 ret = twl6040->rev;
713 goto gpio_err;
714 }
715
716 /* ERRATA: Automatic power-up is not possible in ES1.0 */
717 if (twl6040_get_revid(twl6040) > TWL6040_REV_ES1_0)
718 twl6040->audpwron = of_get_named_gpio(node,
719 "ti,audpwron-gpio", 0);
720 else
721 twl6040->audpwron = -EINVAL;
722
723 if (gpio_is_valid(twl6040->audpwron)) {
724 ret = devm_gpio_request_one(&client->dev, twl6040->audpwron,
725 GPIOF_OUT_INIT_LOW, "audpwron");
726 if (ret)
727 goto gpio_err;
728
729 /* Clear any pending interrupt */
730 twl6040_reg_read(twl6040, TWL6040_REG_INTID);
731 }
732
733 ret = regmap_add_irq_chip(twl6040->regmap, twl6040->irq, IRQF_ONESHOT,
734 0, &twl6040_irq_chip, &twl6040->irq_data);
735 if (ret < 0)
736 goto gpio_err;
737
738 twl6040->irq_ready = regmap_irq_get_virq(twl6040->irq_data,
739 TWL6040_IRQ_READY);
740 twl6040->irq_th = regmap_irq_get_virq(twl6040->irq_data,
741 TWL6040_IRQ_TH);
742
743 ret = devm_request_threaded_irq(twl6040->dev, twl6040->irq_ready, NULL,
744 twl6040_readyint_handler, IRQF_ONESHOT,
745 "twl6040_irq_ready", twl6040);
746 if (ret) {
747 dev_err(twl6040->dev, "READY IRQ request failed: %d\n", ret);
748 goto readyirq_err;
749 }
750
751 ret = devm_request_threaded_irq(twl6040->dev, twl6040->irq_th, NULL,
752 twl6040_thint_handler, IRQF_ONESHOT,
753 "twl6040_irq_th", twl6040);
754 if (ret) {
755 dev_err(twl6040->dev, "Thermal IRQ request failed: %d\n", ret);
756 goto readyirq_err;
757 }
758
759 /*
760 * The main functionality of twl6040 to provide audio on OMAP4+ systems.
761 * We can add the ASoC codec child whenever this driver has been loaded.
762 */
763 irq = regmap_irq_get_virq(twl6040->irq_data, TWL6040_IRQ_PLUG);
764 cell = &twl6040->cells[children];
765 cell->name = "twl6040-codec";
766 twl6040_codec_rsrc[0].start = irq;
767 twl6040_codec_rsrc[0].end = irq;
768 cell->resources = twl6040_codec_rsrc;
769 cell->num_resources = ARRAY_SIZE(twl6040_codec_rsrc);
770 children++;
771
772 /* Vibra input driver support */
773 if (twl6040_has_vibra(node)) {
774 irq = regmap_irq_get_virq(twl6040->irq_data, TWL6040_IRQ_VIB);
775
776 cell = &twl6040->cells[children];
777 cell->name = "twl6040-vibra";
778 twl6040_vibra_rsrc[0].start = irq;
779 twl6040_vibra_rsrc[0].end = irq;
780 cell->resources = twl6040_vibra_rsrc;
781 cell->num_resources = ARRAY_SIZE(twl6040_vibra_rsrc);
782 children++;
783 }
784
785 /* GPO support */
786 cell = &twl6040->cells[children];
787 cell->name = "twl6040-gpo";
788 children++;
789
790 /* PDM clock support */
791 cell = &twl6040->cells[children];
792 cell->name = "twl6040-pdmclk";
793 children++;
794
795 /* The chip is powered down so mark regmap to cache only and dirty */
796 regcache_cache_only(twl6040->regmap, true);
797 regcache_mark_dirty(twl6040->regmap);
798
799 ret = mfd_add_devices(&client->dev, -1, twl6040->cells, children,
800 NULL, 0, NULL);
801 if (ret)
802 goto readyirq_err;
803
804 return 0;
805
806 readyirq_err:
807 regmap_del_irq_chip(twl6040->irq, twl6040->irq_data);
808 gpio_err:
809 regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
810 return ret;
811 }
812
twl6040_remove(struct i2c_client * client)813 static int twl6040_remove(struct i2c_client *client)
814 {
815 struct twl6040 *twl6040 = i2c_get_clientdata(client);
816
817 if (twl6040->power_count)
818 twl6040_power(twl6040, 0);
819
820 regmap_del_irq_chip(twl6040->irq, twl6040->irq_data);
821
822 mfd_remove_devices(&client->dev);
823
824 regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
825
826 return 0;
827 }
828
829 static const struct i2c_device_id twl6040_i2c_id[] = {
830 { "twl6040", 0, },
831 { "twl6041", 0, },
832 { },
833 };
834 MODULE_DEVICE_TABLE(i2c, twl6040_i2c_id);
835
836 static struct i2c_driver twl6040_driver = {
837 .driver = {
838 .name = "twl6040",
839 },
840 .probe = twl6040_probe,
841 .remove = twl6040_remove,
842 .id_table = twl6040_i2c_id,
843 };
844
845 module_i2c_driver(twl6040_driver);
846
847 MODULE_DESCRIPTION("TWL6040 MFD");
848 MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>");
849 MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>");
850 MODULE_LICENSE("GPL");
851
