1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * MFD driver for TWL6040 audio device
4  *
5  * Authors:	Misael Lopez Cruz <misael.lopez@ti.com>
6  *		Jorge Eduardo Candelaria <jorge.candelaria@ti.com>
7  *		Peter Ujfalusi <peter.ujfalusi@ti.com>
8  *
9  * Copyright:	(C) 2011 Texas Instruments, Inc.
10  */
11 
12 #include <linux/module.h>
13 #include <linux/types.h>
14 #include <linux/slab.h>
15 #include <linux/kernel.h>
16 #include <linux/err.h>
17 #include <linux/platform_device.h>
18 #include <linux/of.h>
19 #include <linux/of_irq.h>
20 #include <linux/of_gpio.h>
21 #include <linux/of_platform.h>
22 #include <linux/gpio.h>
23 #include <linux/delay.h>
24 #include <linux/i2c.h>
25 #include <linux/regmap.h>
26 #include <linux/mfd/core.h>
27 #include <linux/mfd/twl6040.h>
28 #include <linux/regulator/consumer.h>
29 
30 #define VIBRACTRL_MEMBER(reg) ((reg == TWL6040_REG_VIBCTLL) ? 0 : 1)
31 #define TWL6040_NUM_SUPPLIES	(2)
32 
33 static const struct reg_default twl6040_defaults[] = {
34 	{ 0x01, 0x4B }, /* REG_ASICID	(ro) */
35 	{ 0x02, 0x00 }, /* REG_ASICREV	(ro) */
36 	{ 0x03, 0x00 }, /* REG_INTID	*/
37 	{ 0x04, 0x00 }, /* REG_INTMR	*/
38 	{ 0x05, 0x00 }, /* REG_NCPCTRL	*/
39 	{ 0x06, 0x00 }, /* REG_LDOCTL	*/
40 	{ 0x07, 0x60 }, /* REG_HPPLLCTL	*/
41 	{ 0x08, 0x00 }, /* REG_LPPLLCTL	*/
42 	{ 0x09, 0x4A }, /* REG_LPPLLDIV	*/
43 	{ 0x0A, 0x00 }, /* REG_AMICBCTL	*/
44 	{ 0x0B, 0x00 }, /* REG_DMICBCTL	*/
45 	{ 0x0C, 0x00 }, /* REG_MICLCTL	*/
46 	{ 0x0D, 0x00 }, /* REG_MICRCTL	*/
47 	{ 0x0E, 0x00 }, /* REG_MICGAIN	*/
48 	{ 0x0F, 0x1B }, /* REG_LINEGAIN	*/
49 	{ 0x10, 0x00 }, /* REG_HSLCTL	*/
50 	{ 0x11, 0x00 }, /* REG_HSRCTL	*/
51 	{ 0x12, 0x00 }, /* REG_HSGAIN	*/
52 	{ 0x13, 0x00 }, /* REG_EARCTL	*/
53 	{ 0x14, 0x00 }, /* REG_HFLCTL	*/
54 	{ 0x15, 0x00 }, /* REG_HFLGAIN	*/
55 	{ 0x16, 0x00 }, /* REG_HFRCTL	*/
56 	{ 0x17, 0x00 }, /* REG_HFRGAIN	*/
57 	{ 0x18, 0x00 }, /* REG_VIBCTLL	*/
58 	{ 0x19, 0x00 }, /* REG_VIBDATL	*/
59 	{ 0x1A, 0x00 }, /* REG_VIBCTLR	*/
60 	{ 0x1B, 0x00 }, /* REG_VIBDATR	*/
61 	{ 0x1C, 0x00 }, /* REG_HKCTL1	*/
62 	{ 0x1D, 0x00 }, /* REG_HKCTL2	*/
63 	{ 0x1E, 0x00 }, /* REG_GPOCTL	*/
64 	{ 0x1F, 0x00 }, /* REG_ALB	*/
65 	{ 0x20, 0x00 }, /* REG_DLB	*/
66 	/* 0x28, REG_TRIM1 */
67 	/* 0x29, REG_TRIM2 */
68 	/* 0x2A, REG_TRIM3 */
69 	/* 0x2B, REG_HSOTRIM */
70 	/* 0x2C, REG_HFOTRIM */
71 	{ 0x2D, 0x08 }, /* REG_ACCCTL	*/
72 	{ 0x2E, 0x00 }, /* REG_STATUS	(ro) */
73 };
74 
75 static struct reg_sequence twl6040_patch[] = {
76 	/*
77 	 * Select I2C bus access to dual access registers
78 	 * Interrupt register is cleared on read
79 	 * Select fast mode for i2c (400KHz)
80 	 */
81 	{ TWL6040_REG_ACCCTL,
82 		TWL6040_I2CSEL | TWL6040_INTCLRMODE | TWL6040_I2CMODE(1) },
83 };
84 
85 
twl6040_has_vibra(struct device_node * parent)86 static bool twl6040_has_vibra(struct device_node *parent)
87 {
88 	struct device_node *node;
89 
90 	node = of_get_child_by_name(parent, "vibra");
91 	if (node) {
92 		of_node_put(node);
93 		return true;
94 	}
95 
96 	return false;
97 }
98 
twl6040_reg_read(struct twl6040 * twl6040,unsigned int reg)99 int twl6040_reg_read(struct twl6040 *twl6040, unsigned int reg)
100 {
101 	int ret;
102 	unsigned int val;
103 
104 	ret = regmap_read(twl6040->regmap, reg, &val);
105 	if (ret < 0)
106 		return ret;
107 
108 	return val;
109 }
110 EXPORT_SYMBOL(twl6040_reg_read);
111 
twl6040_reg_write(struct twl6040 * twl6040,unsigned int reg,u8 val)112 int twl6040_reg_write(struct twl6040 *twl6040, unsigned int reg, u8 val)
113 {
114 	int ret;
115 
116 	ret = regmap_write(twl6040->regmap, reg, val);
117 
118 	return ret;
119 }
120 EXPORT_SYMBOL(twl6040_reg_write);
121 
twl6040_set_bits(struct twl6040 * twl6040,unsigned int reg,u8 mask)122 int twl6040_set_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
123 {
124 	return regmap_update_bits(twl6040->regmap, reg, mask, mask);
125 }
126 EXPORT_SYMBOL(twl6040_set_bits);
127 
twl6040_clear_bits(struct twl6040 * twl6040,unsigned int reg,u8 mask)128 int twl6040_clear_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
129 {
130 	return regmap_update_bits(twl6040->regmap, reg, mask, 0);
131 }
132 EXPORT_SYMBOL(twl6040_clear_bits);
133 
134 /* twl6040 codec manual power-up sequence */
twl6040_power_up_manual(struct twl6040 * twl6040)135 static int twl6040_power_up_manual(struct twl6040 *twl6040)
136 {
137 	u8 ldoctl, ncpctl, lppllctl;
138 	int ret;
139 
140 	/* enable high-side LDO, reference system and internal oscillator */
141 	ldoctl = TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA;
142 	ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
143 	if (ret)
144 		return ret;
145 	usleep_range(10000, 10500);
146 
147 	/* enable negative charge pump */
148 	ncpctl = TWL6040_NCPENA;
149 	ret = twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
150 	if (ret)
151 		goto ncp_err;
152 	usleep_range(1000, 1500);
153 
154 	/* enable low-side LDO */
155 	ldoctl |= TWL6040_LSLDOENA;
156 	ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
157 	if (ret)
158 		goto lsldo_err;
159 	usleep_range(1000, 1500);
160 
161 	/* enable low-power PLL */
162 	lppllctl = TWL6040_LPLLENA;
163 	ret = twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
164 	if (ret)
165 		goto lppll_err;
166 	usleep_range(5000, 5500);
167 
168 	/* disable internal oscillator */
169 	ldoctl &= ~TWL6040_OSCENA;
170 	ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
171 	if (ret)
172 		goto osc_err;
173 
174 	return 0;
175 
176 osc_err:
177 	lppllctl &= ~TWL6040_LPLLENA;
178 	twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
179 lppll_err:
180 	ldoctl &= ~TWL6040_LSLDOENA;
181 	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
182 lsldo_err:
183 	ncpctl &= ~TWL6040_NCPENA;
184 	twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
185 ncp_err:
186 	ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
187 	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
188 
189 	dev_err(twl6040->dev, "manual power-up failed\n");
190 	return ret;
191 }
192 
193 /* twl6040 manual power-down sequence */
twl6040_power_down_manual(struct twl6040 * twl6040)194 static void twl6040_power_down_manual(struct twl6040 *twl6040)
195 {
196 	u8 ncpctl, ldoctl, lppllctl;
197 
198 	ncpctl = twl6040_reg_read(twl6040, TWL6040_REG_NCPCTL);
199 	ldoctl = twl6040_reg_read(twl6040, TWL6040_REG_LDOCTL);
200 	lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
201 
202 	/* enable internal oscillator */
203 	ldoctl |= TWL6040_OSCENA;
204 	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
205 	usleep_range(1000, 1500);
206 
207 	/* disable low-power PLL */
208 	lppllctl &= ~TWL6040_LPLLENA;
209 	twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
210 
211 	/* disable low-side LDO */
212 	ldoctl &= ~TWL6040_LSLDOENA;
213 	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
214 
215 	/* disable negative charge pump */
216 	ncpctl &= ~TWL6040_NCPENA;
217 	twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
218 
219 	/* disable high-side LDO, reference system and internal oscillator */
220 	ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
221 	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
222 }
223 
twl6040_readyint_handler(int irq,void * data)224 static irqreturn_t twl6040_readyint_handler(int irq, void *data)
225 {
226 	struct twl6040 *twl6040 = data;
227 
228 	complete(&twl6040->ready);
229 
230 	return IRQ_HANDLED;
231 }
232 
twl6040_thint_handler(int irq,void * data)233 static irqreturn_t twl6040_thint_handler(int irq, void *data)
234 {
235 	struct twl6040 *twl6040 = data;
236 	u8 status;
237 
238 	status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS);
239 	if (status & TWL6040_TSHUTDET) {
240 		dev_warn(twl6040->dev, "Thermal shutdown, powering-off");
241 		twl6040_power(twl6040, 0);
242 	} else {
243 		dev_warn(twl6040->dev, "Leaving thermal shutdown, powering-on");
244 		twl6040_power(twl6040, 1);
245 	}
246 
247 	return IRQ_HANDLED;
248 }
249 
twl6040_power_up_automatic(struct twl6040 * twl6040)250 static int twl6040_power_up_automatic(struct twl6040 *twl6040)
251 {
252 	int time_left;
253 
254 	gpio_set_value(twl6040->audpwron, 1);
255 
256 	time_left = wait_for_completion_timeout(&twl6040->ready,
257 						msecs_to_jiffies(144));
258 	if (!time_left) {
259 		u8 intid;
260 
261 		dev_warn(twl6040->dev, "timeout waiting for READYINT\n");
262 		intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID);
263 		if (!(intid & TWL6040_READYINT)) {
264 			dev_err(twl6040->dev, "automatic power-up failed\n");
265 			gpio_set_value(twl6040->audpwron, 0);
266 			return -ETIMEDOUT;
267 		}
268 	}
269 
270 	return 0;
271 }
272 
twl6040_power(struct twl6040 * twl6040,int on)273 int twl6040_power(struct twl6040 *twl6040, int on)
274 {
275 	int ret = 0;
276 
277 	mutex_lock(&twl6040->mutex);
278 
279 	if (on) {
280 		/* already powered-up */
281 		if (twl6040->power_count++)
282 			goto out;
283 
284 		ret = clk_prepare_enable(twl6040->clk32k);
285 		if (ret) {
286 			twl6040->power_count = 0;
287 			goto out;
288 		}
289 
290 		/* Allow writes to the chip */
291 		regcache_cache_only(twl6040->regmap, false);
292 
293 		if (gpio_is_valid(twl6040->audpwron)) {
294 			/* use automatic power-up sequence */
295 			ret = twl6040_power_up_automatic(twl6040);
296 			if (ret) {
297 				clk_disable_unprepare(twl6040->clk32k);
298 				twl6040->power_count = 0;
299 				goto out;
300 			}
301 		} else {
302 			/* use manual power-up sequence */
303 			ret = twl6040_power_up_manual(twl6040);
304 			if (ret) {
305 				clk_disable_unprepare(twl6040->clk32k);
306 				twl6040->power_count = 0;
307 				goto out;
308 			}
309 		}
310 
311 		/*
312 		 * Register access can produce errors after power-up unless we
313 		 * wait at least 8ms based on measurements on duovero.
314 		 */
315 		usleep_range(10000, 12000);
316 
317 		/* Sync with the HW */
318 		ret = regcache_sync(twl6040->regmap);
319 		if (ret) {
320 			dev_err(twl6040->dev, "Failed to sync with the HW: %i\n",
321 				ret);
322 			goto out;
323 		}
324 
325 		/* Default PLL configuration after power up */
326 		twl6040->pll = TWL6040_SYSCLK_SEL_LPPLL;
327 		twl6040->sysclk_rate = 19200000;
328 	} else {
329 		/* already powered-down */
330 		if (!twl6040->power_count) {
331 			dev_err(twl6040->dev,
332 				"device is already powered-off\n");
333 			ret = -EPERM;
334 			goto out;
335 		}
336 
337 		if (--twl6040->power_count)
338 			goto out;
339 
340 		if (gpio_is_valid(twl6040->audpwron)) {
341 			/* use AUDPWRON line */
342 			gpio_set_value(twl6040->audpwron, 0);
343 
344 			/* power-down sequence latency */
345 			usleep_range(500, 700);
346 		} else {
347 			/* use manual power-down sequence */
348 			twl6040_power_down_manual(twl6040);
349 		}
350 
351 		/* Set regmap to cache only and mark it as dirty */
352 		regcache_cache_only(twl6040->regmap, true);
353 		regcache_mark_dirty(twl6040->regmap);
354 
355 		twl6040->sysclk_rate = 0;
356 
357 		if (twl6040->pll == TWL6040_SYSCLK_SEL_HPPLL) {
358 			clk_disable_unprepare(twl6040->mclk);
359 			twl6040->mclk_rate = 0;
360 		}
361 
362 		clk_disable_unprepare(twl6040->clk32k);
363 	}
364 
365 out:
366 	mutex_unlock(&twl6040->mutex);
367 	return ret;
368 }
369 EXPORT_SYMBOL(twl6040_power);
370 
twl6040_set_pll(struct twl6040 * twl6040,int pll_id,unsigned int freq_in,unsigned int freq_out)371 int twl6040_set_pll(struct twl6040 *twl6040, int pll_id,
372 		    unsigned int freq_in, unsigned int freq_out)
373 {
374 	u8 hppllctl, lppllctl;
375 	int ret = 0;
376 
377 	mutex_lock(&twl6040->mutex);
378 
379 	hppllctl = twl6040_reg_read(twl6040, TWL6040_REG_HPPLLCTL);
380 	lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
381 
382 	/* Force full reconfiguration when switching between PLL */
383 	if (pll_id != twl6040->pll) {
384 		twl6040->sysclk_rate = 0;
385 		twl6040->mclk_rate = 0;
386 	}
387 
388 	switch (pll_id) {
389 	case TWL6040_SYSCLK_SEL_LPPLL:
390 		/* low-power PLL divider */
391 		/* Change the sysclk configuration only if it has been canged */
392 		if (twl6040->sysclk_rate != freq_out) {
393 			switch (freq_out) {
394 			case 17640000:
395 				lppllctl |= TWL6040_LPLLFIN;
396 				break;
397 			case 19200000:
398 				lppllctl &= ~TWL6040_LPLLFIN;
399 				break;
400 			default:
401 				dev_err(twl6040->dev,
402 					"freq_out %d not supported\n",
403 					freq_out);
404 				ret = -EINVAL;
405 				goto pll_out;
406 			}
407 			twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
408 					  lppllctl);
409 		}
410 
411 		/* The PLL in use has not been change, we can exit */
412 		if (twl6040->pll == pll_id)
413 			break;
414 
415 		switch (freq_in) {
416 		case 32768:
417 			lppllctl |= TWL6040_LPLLENA;
418 			twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
419 					  lppllctl);
420 			mdelay(5);
421 			lppllctl &= ~TWL6040_HPLLSEL;
422 			twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
423 					  lppllctl);
424 			hppllctl &= ~TWL6040_HPLLENA;
425 			twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
426 					  hppllctl);
427 			break;
428 		default:
429 			dev_err(twl6040->dev,
430 				"freq_in %d not supported\n", freq_in);
431 			ret = -EINVAL;
432 			goto pll_out;
433 		}
434 
435 		clk_disable_unprepare(twl6040->mclk);
436 		break;
437 	case TWL6040_SYSCLK_SEL_HPPLL:
438 		/* high-performance PLL can provide only 19.2 MHz */
439 		if (freq_out != 19200000) {
440 			dev_err(twl6040->dev,
441 				"freq_out %d not supported\n", freq_out);
442 			ret = -EINVAL;
443 			goto pll_out;
444 		}
445 
446 		if (twl6040->mclk_rate != freq_in) {
447 			hppllctl &= ~TWL6040_MCLK_MSK;
448 
449 			switch (freq_in) {
450 			case 12000000:
451 				/* PLL enabled, active mode */
452 				hppllctl |= TWL6040_MCLK_12000KHZ |
453 					    TWL6040_HPLLENA;
454 				break;
455 			case 19200000:
456 				/* PLL enabled, bypass mode */
457 				hppllctl |= TWL6040_MCLK_19200KHZ |
458 					    TWL6040_HPLLBP | TWL6040_HPLLENA;
459 				break;
460 			case 26000000:
461 				/* PLL enabled, active mode */
462 				hppllctl |= TWL6040_MCLK_26000KHZ |
463 					    TWL6040_HPLLENA;
464 				break;
465 			case 38400000:
466 				/* PLL enabled, bypass mode */
467 				hppllctl |= TWL6040_MCLK_38400KHZ |
468 					    TWL6040_HPLLBP | TWL6040_HPLLENA;
469 				break;
470 			default:
471 				dev_err(twl6040->dev,
472 					"freq_in %d not supported\n", freq_in);
473 				ret = -EINVAL;
474 				goto pll_out;
475 			}
476 
477 			/* When switching to HPPLL, enable the mclk first */
478 			if (pll_id != twl6040->pll)
479 				clk_prepare_enable(twl6040->mclk);
480 			/*
481 			 * enable clock slicer to ensure input waveform is
482 			 * square
483 			 */
484 			hppllctl |= TWL6040_HPLLSQRENA;
485 
486 			twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
487 					  hppllctl);
488 			usleep_range(500, 700);
489 			lppllctl |= TWL6040_HPLLSEL;
490 			twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
491 					  lppllctl);
492 			lppllctl &= ~TWL6040_LPLLENA;
493 			twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
494 					  lppllctl);
495 
496 			twl6040->mclk_rate = freq_in;
497 		}
498 		break;
499 	default:
500 		dev_err(twl6040->dev, "unknown pll id %d\n", pll_id);
501 		ret = -EINVAL;
502 		goto pll_out;
503 	}
504 
505 	twl6040->sysclk_rate = freq_out;
506 	twl6040->pll = pll_id;
507 
508 pll_out:
509 	mutex_unlock(&twl6040->mutex);
510 	return ret;
511 }
512 EXPORT_SYMBOL(twl6040_set_pll);
513 
twl6040_get_pll(struct twl6040 * twl6040)514 int twl6040_get_pll(struct twl6040 *twl6040)
515 {
516 	if (twl6040->power_count)
517 		return twl6040->pll;
518 	else
519 		return -ENODEV;
520 }
521 EXPORT_SYMBOL(twl6040_get_pll);
522 
twl6040_get_sysclk(struct twl6040 * twl6040)523 unsigned int twl6040_get_sysclk(struct twl6040 *twl6040)
524 {
525 	return twl6040->sysclk_rate;
526 }
527 EXPORT_SYMBOL(twl6040_get_sysclk);
528 
529 /* Get the combined status of the vibra control register */
twl6040_get_vibralr_status(struct twl6040 * twl6040)530 int twl6040_get_vibralr_status(struct twl6040 *twl6040)
531 {
532 	unsigned int reg;
533 	int ret;
534 	u8 status;
535 
536 	ret = regmap_read(twl6040->regmap, TWL6040_REG_VIBCTLL, &reg);
537 	if (ret != 0)
538 		return ret;
539 	status = reg;
540 
541 	ret = regmap_read(twl6040->regmap, TWL6040_REG_VIBCTLR, &reg);
542 	if (ret != 0)
543 		return ret;
544 	status |= reg;
545 
546 	status &= (TWL6040_VIBENA | TWL6040_VIBSEL);
547 
548 	return status;
549 }
550 EXPORT_SYMBOL(twl6040_get_vibralr_status);
551 
552 static struct resource twl6040_vibra_rsrc[] = {
553 	{
554 		.flags = IORESOURCE_IRQ,
555 	},
556 };
557 
558 static struct resource twl6040_codec_rsrc[] = {
559 	{
560 		.flags = IORESOURCE_IRQ,
561 	},
562 };
563 
twl6040_readable_reg(struct device * dev,unsigned int reg)564 static bool twl6040_readable_reg(struct device *dev, unsigned int reg)
565 {
566 	/* Register 0 is not readable */
567 	if (!reg)
568 		return false;
569 	return true;
570 }
571 
twl6040_volatile_reg(struct device * dev,unsigned int reg)572 static bool twl6040_volatile_reg(struct device *dev, unsigned int reg)
573 {
574 	switch (reg) {
575 	case TWL6040_REG_ASICID:
576 	case TWL6040_REG_ASICREV:
577 	case TWL6040_REG_INTID:
578 	case TWL6040_REG_LPPLLCTL:
579 	case TWL6040_REG_HPPLLCTL:
580 	case TWL6040_REG_STATUS:
581 		return true;
582 	default:
583 		return false;
584 	}
585 }
586 
twl6040_writeable_reg(struct device * dev,unsigned int reg)587 static bool twl6040_writeable_reg(struct device *dev, unsigned int reg)
588 {
589 	switch (reg) {
590 	case TWL6040_REG_ASICID:
591 	case TWL6040_REG_ASICREV:
592 	case TWL6040_REG_STATUS:
593 		return false;
594 	default:
595 		return true;
596 	}
597 }
598 
599 static const struct regmap_config twl6040_regmap_config = {
600 	.reg_bits = 8,
601 	.val_bits = 8,
602 
603 	.reg_defaults = twl6040_defaults,
604 	.num_reg_defaults = ARRAY_SIZE(twl6040_defaults),
605 
606 	.max_register = TWL6040_REG_STATUS, /* 0x2e */
607 
608 	.readable_reg = twl6040_readable_reg,
609 	.volatile_reg = twl6040_volatile_reg,
610 	.writeable_reg = twl6040_writeable_reg,
611 
612 	.cache_type = REGCACHE_RBTREE,
613 	.use_single_read = true,
614 	.use_single_write = true,
615 };
616 
617 static const struct regmap_irq twl6040_irqs[] = {
618 	{ .reg_offset = 0, .mask = TWL6040_THINT, },
619 	{ .reg_offset = 0, .mask = TWL6040_PLUGINT | TWL6040_UNPLUGINT, },
620 	{ .reg_offset = 0, .mask = TWL6040_HOOKINT, },
621 	{ .reg_offset = 0, .mask = TWL6040_HFINT, },
622 	{ .reg_offset = 0, .mask = TWL6040_VIBINT, },
623 	{ .reg_offset = 0, .mask = TWL6040_READYINT, },
624 };
625 
626 static struct regmap_irq_chip twl6040_irq_chip = {
627 	.name = "twl6040",
628 	.irqs = twl6040_irqs,
629 	.num_irqs = ARRAY_SIZE(twl6040_irqs),
630 
631 	.num_regs = 1,
632 	.status_base = TWL6040_REG_INTID,
633 	.mask_base = TWL6040_REG_INTMR,
634 };
635 
twl6040_probe(struct i2c_client * client,const struct i2c_device_id * id)636 static int twl6040_probe(struct i2c_client *client,
637 			 const struct i2c_device_id *id)
638 {
639 	struct device_node *node = client->dev.of_node;
640 	struct twl6040 *twl6040;
641 	struct mfd_cell *cell = NULL;
642 	int irq, ret, children = 0;
643 
644 	if (!node) {
645 		dev_err(&client->dev, "of node is missing\n");
646 		return -EINVAL;
647 	}
648 
649 	/* In order to operate correctly we need valid interrupt config */
650 	if (!client->irq) {
651 		dev_err(&client->dev, "Invalid IRQ configuration\n");
652 		return -EINVAL;
653 	}
654 
655 	twl6040 = devm_kzalloc(&client->dev, sizeof(struct twl6040),
656 			       GFP_KERNEL);
657 	if (!twl6040)
658 		return -ENOMEM;
659 
660 	twl6040->regmap = devm_regmap_init_i2c(client, &twl6040_regmap_config);
661 	if (IS_ERR(twl6040->regmap))
662 		return PTR_ERR(twl6040->regmap);
663 
664 	i2c_set_clientdata(client, twl6040);
665 
666 	twl6040->clk32k = devm_clk_get(&client->dev, "clk32k");
667 	if (IS_ERR(twl6040->clk32k)) {
668 		if (PTR_ERR(twl6040->clk32k) == -EPROBE_DEFER)
669 			return -EPROBE_DEFER;
670 		dev_dbg(&client->dev, "clk32k is not handled\n");
671 		twl6040->clk32k = NULL;
672 	}
673 
674 	twl6040->mclk = devm_clk_get(&client->dev, "mclk");
675 	if (IS_ERR(twl6040->mclk)) {
676 		if (PTR_ERR(twl6040->mclk) == -EPROBE_DEFER)
677 			return -EPROBE_DEFER;
678 		dev_dbg(&client->dev, "mclk is not handled\n");
679 		twl6040->mclk = NULL;
680 	}
681 
682 	twl6040->supplies[0].supply = "vio";
683 	twl6040->supplies[1].supply = "v2v1";
684 	ret = devm_regulator_bulk_get(&client->dev, TWL6040_NUM_SUPPLIES,
685 				      twl6040->supplies);
686 	if (ret != 0) {
687 		dev_err(&client->dev, "Failed to get supplies: %d\n", ret);
688 		return ret;
689 	}
690 
691 	ret = regulator_bulk_enable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
692 	if (ret != 0) {
693 		dev_err(&client->dev, "Failed to enable supplies: %d\n", ret);
694 		return ret;
695 	}
696 
697 	twl6040->dev = &client->dev;
698 	twl6040->irq = client->irq;
699 
700 	mutex_init(&twl6040->mutex);
701 	init_completion(&twl6040->ready);
702 
703 	regmap_register_patch(twl6040->regmap, twl6040_patch,
704 			      ARRAY_SIZE(twl6040_patch));
705 
706 	twl6040->rev = twl6040_reg_read(twl6040, TWL6040_REG_ASICREV);
707 	if (twl6040->rev < 0) {
708 		dev_err(&client->dev, "Failed to read revision register: %d\n",
709 			twl6040->rev);
710 		ret = twl6040->rev;
711 		goto gpio_err;
712 	}
713 
714 	/* ERRATA: Automatic power-up is not possible in ES1.0 */
715 	if (twl6040_get_revid(twl6040) > TWL6040_REV_ES1_0)
716 		twl6040->audpwron = of_get_named_gpio(node,
717 						      "ti,audpwron-gpio", 0);
718 	else
719 		twl6040->audpwron = -EINVAL;
720 
721 	if (gpio_is_valid(twl6040->audpwron)) {
722 		ret = devm_gpio_request_one(&client->dev, twl6040->audpwron,
723 					    GPIOF_OUT_INIT_LOW, "audpwron");
724 		if (ret)
725 			goto gpio_err;
726 
727 		/* Clear any pending interrupt */
728 		twl6040_reg_read(twl6040, TWL6040_REG_INTID);
729 	}
730 
731 	ret = regmap_add_irq_chip(twl6040->regmap, twl6040->irq, IRQF_ONESHOT,
732 				  0, &twl6040_irq_chip, &twl6040->irq_data);
733 	if (ret < 0)
734 		goto gpio_err;
735 
736 	twl6040->irq_ready = regmap_irq_get_virq(twl6040->irq_data,
737 						 TWL6040_IRQ_READY);
738 	twl6040->irq_th = regmap_irq_get_virq(twl6040->irq_data,
739 					      TWL6040_IRQ_TH);
740 
741 	ret = devm_request_threaded_irq(twl6040->dev, twl6040->irq_ready, NULL,
742 					twl6040_readyint_handler, IRQF_ONESHOT,
743 					"twl6040_irq_ready", twl6040);
744 	if (ret) {
745 		dev_err(twl6040->dev, "READY IRQ request failed: %d\n", ret);
746 		goto readyirq_err;
747 	}
748 
749 	ret = devm_request_threaded_irq(twl6040->dev, twl6040->irq_th, NULL,
750 					twl6040_thint_handler, IRQF_ONESHOT,
751 					"twl6040_irq_th", twl6040);
752 	if (ret) {
753 		dev_err(twl6040->dev, "Thermal IRQ request failed: %d\n", ret);
754 		goto readyirq_err;
755 	}
756 
757 	/*
758 	 * The main functionality of twl6040 to provide audio on OMAP4+ systems.
759 	 * We can add the ASoC codec child whenever this driver has been loaded.
760 	 */
761 	irq = regmap_irq_get_virq(twl6040->irq_data, TWL6040_IRQ_PLUG);
762 	cell = &twl6040->cells[children];
763 	cell->name = "twl6040-codec";
764 	twl6040_codec_rsrc[0].start = irq;
765 	twl6040_codec_rsrc[0].end = irq;
766 	cell->resources = twl6040_codec_rsrc;
767 	cell->num_resources = ARRAY_SIZE(twl6040_codec_rsrc);
768 	children++;
769 
770 	/* Vibra input driver support */
771 	if (twl6040_has_vibra(node)) {
772 		irq = regmap_irq_get_virq(twl6040->irq_data, TWL6040_IRQ_VIB);
773 
774 		cell = &twl6040->cells[children];
775 		cell->name = "twl6040-vibra";
776 		twl6040_vibra_rsrc[0].start = irq;
777 		twl6040_vibra_rsrc[0].end = irq;
778 		cell->resources = twl6040_vibra_rsrc;
779 		cell->num_resources = ARRAY_SIZE(twl6040_vibra_rsrc);
780 		children++;
781 	}
782 
783 	/* GPO support */
784 	cell = &twl6040->cells[children];
785 	cell->name = "twl6040-gpo";
786 	children++;
787 
788 	/* PDM clock support  */
789 	cell = &twl6040->cells[children];
790 	cell->name = "twl6040-pdmclk";
791 	children++;
792 
793 	/* The chip is powered down so mark regmap to cache only and dirty */
794 	regcache_cache_only(twl6040->regmap, true);
795 	regcache_mark_dirty(twl6040->regmap);
796 
797 	ret = mfd_add_devices(&client->dev, -1, twl6040->cells, children,
798 			      NULL, 0, NULL);
799 	if (ret)
800 		goto readyirq_err;
801 
802 	return 0;
803 
804 readyirq_err:
805 	regmap_del_irq_chip(twl6040->irq, twl6040->irq_data);
806 gpio_err:
807 	regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
808 	return ret;
809 }
810 
twl6040_remove(struct i2c_client * client)811 static void twl6040_remove(struct i2c_client *client)
812 {
813 	struct twl6040 *twl6040 = i2c_get_clientdata(client);
814 
815 	if (twl6040->power_count)
816 		twl6040_power(twl6040, 0);
817 
818 	regmap_del_irq_chip(twl6040->irq, twl6040->irq_data);
819 
820 	mfd_remove_devices(&client->dev);
821 
822 	regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
823 }
824 
825 static const struct i2c_device_id twl6040_i2c_id[] = {
826 	{ "twl6040", 0, },
827 	{ "twl6041", 0, },
828 	{ },
829 };
830 MODULE_DEVICE_TABLE(i2c, twl6040_i2c_id);
831 
832 static struct i2c_driver twl6040_driver = {
833 	.driver = {
834 		.name = "twl6040",
835 	},
836 	.probe		= twl6040_probe,
837 	.remove		= twl6040_remove,
838 	.id_table	= twl6040_i2c_id,
839 };
840 
841 module_i2c_driver(twl6040_driver);
842 
843 MODULE_DESCRIPTION("TWL6040 MFD");
844 MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>");
845 MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>");
846 MODULE_LICENSE("GPL");
847