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