1// SPDX-License-Identifier: GPL-2.0
2
3#include <linux/bits.h>
4#include <linux/bitfield.h>
5#include <linux/delay.h>
6#include <linux/gpio/consumer.h>
7#include <linux/i2c.h>
8#include <linux/kernel.h>
9#include <linux/module.h>
10#include <linux/pm_runtime.h>
11#include <linux/regmap.h>
12#include <linux/regulator/consumer.h>
13#include <sound/pcm.h>
14#include <sound/pcm_params.h>
15#include <sound/soc.h>
16#include <sound/tlv.h>
17
18#define RT9120_REG_DEVID 0x00
19#define RT9120_REG_I2SFMT 0x02
20#define RT9120_REG_I2SWL 0x03
21#define RT9120_REG_SDIOSEL 0x04
22#define RT9120_REG_SYSCTL 0x05
23#define RT9120_REG_SPKGAIN 0x07
24#define RT9120_REG_VOLRAMP 0x0A
25#define RT9120_REG_ERRRPT 0x10
26#define RT9120_REG_MSVOL 0x20
27#define RT9120_REG_SWRESET 0x40
28#define RT9120_REG_INTERCFG 0x63
29#define RT9120_REG_INTERNAL0 0x65
30#define RT9120_REG_INTERNAL1 0x69
31#define RT9120_REG_UVPOPT 0x6C
32#define RT9120_REG_DIGCFG 0xF8
33
34#define RT9120_VID_MASK GENMASK(15, 8)
35#define RT9120_SWRST_MASK BIT(7)
36#define RT9120_MUTE_MASK GENMASK(5, 4)
37#define RT9120_I2SFMT_MASK GENMASK(4, 2)
38#define RT9120_I2SFMT_SHIFT 2
39#define RT9120_CFG_FMT_I2S 0
40#define RT9120_CFG_FMT_LEFTJ 1
41#define RT9120_CFG_FMT_RIGHTJ 2
42#define RT9120_CFG_FMT_DSPA 3
43#define RT9120_CFG_FMT_DSPB 7
44#define RT9120_AUDBIT_MASK GENMASK(1, 0)
45#define RT9120_CFG_AUDBIT_16 0
46#define RT9120_CFG_AUDBIT_20 1
47#define RT9120_CFG_AUDBIT_24 2
48#define RT9120_AUDWL_MASK GENMASK(5, 0)
49#define RT9120_CFG_WORDLEN_16 16
50#define RT9120_CFG_WORDLEN_24 24
51#define RT9120_CFG_WORDLEN_32 32
52#define RT9120_DVDD_UVSEL_MASK GENMASK(5, 4)
53#define RT9120_AUTOSYNC_MASK BIT(6)
54
55#define RT9120_VENDOR_ID 0x42
56#define RT9120S_VENDOR_ID 0x43
57#define RT9120_RESET_WAITMS 20
58#define RT9120_CHIPON_WAITMS 20
59#define RT9120_AMPON_WAITMS 50
60#define RT9120_AMPOFF_WAITMS 100
61#define RT9120_LVAPP_THRESUV 2000000
62
63/* 8000 to 192000 supported , only 176400 not support */
64#define RT9120_RATES_MASK (SNDRV_PCM_RATE_8000_192000 &\
65 ~SNDRV_PCM_RATE_176400)
66#define RT9120_FMTS_MASK (SNDRV_PCM_FMTBIT_S16_LE |\
67 SNDRV_PCM_FMTBIT_S24_LE |\
68 SNDRV_PCM_FMTBIT_S32_LE)
69
70enum {
71 CHIP_IDX_RT9120 = 0,
72 CHIP_IDX_RT9120S,
73 CHIP_IDX_MAX
74};
75
76struct rt9120_data {
77 struct device *dev;
78 struct regmap *regmap;
79 struct gpio_desc *pwdnn_gpio;
80 int chip_idx;
81};
82
83/* 11bit [min,max,step] = [-103.9375dB, 24dB, 0.0625dB] */
84static const DECLARE_TLV_DB_SCALE(digital_tlv, -1039375, 625, 1);
85
86/* {6, 8, 10, 12, 13, 14, 15, 16}dB */
87static const DECLARE_TLV_DB_RANGE(classd_tlv,
88 0, 3, TLV_DB_SCALE_ITEM(600, 200, 0),
89 4, 7, TLV_DB_SCALE_ITEM(1300, 100, 0)
90);
91
92static const char * const sdo_select_text[] = {
93 "None", "INTF", "Final", "RMS Detect"
94};
95
96static const struct soc_enum sdo_select_enum =
97 SOC_ENUM_SINGLE(RT9120_REG_SDIOSEL, 4, ARRAY_SIZE(sdo_select_text),
98 sdo_select_text);
99
100static const struct snd_kcontrol_new rt9120_snd_controls[] = {
101 SOC_SINGLE_TLV("MS Volume", RT9120_REG_MSVOL, 0, 2047, 1, digital_tlv),
102 SOC_SINGLE_TLV("SPK Gain Volume", RT9120_REG_SPKGAIN, 0, 7, 0, classd_tlv),
103 SOC_SINGLE("PBTL Switch", RT9120_REG_SYSCTL, 3, 1, 0),
104 SOC_ENUM("SDO Select", sdo_select_enum),
105};
106
107static int internal_power_event(struct snd_soc_dapm_widget *w,
108 struct snd_kcontrol *kcontrol, int event)
109{
110 struct snd_soc_component *comp = snd_soc_dapm_to_component(dapm: w->dapm);
111
112 switch (event) {
113 case SND_SOC_DAPM_PRE_PMU:
114 snd_soc_component_write(component: comp, RT9120_REG_ERRRPT, val: 0);
115 break;
116 case SND_SOC_DAPM_POST_PMU:
117 msleep(RT9120_AMPON_WAITMS);
118 break;
119 case SND_SOC_DAPM_POST_PMD:
120 msleep(RT9120_AMPOFF_WAITMS);
121 break;
122 default:
123 break;
124 }
125
126 return 0;
127}
128
129static const struct snd_soc_dapm_widget rt9120_dapm_widgets[] = {
130 SND_SOC_DAPM_MIXER("DMIX", SND_SOC_NOPM, 0, 0, NULL, 0),
131 SND_SOC_DAPM_DAC("LDAC", NULL, SND_SOC_NOPM, 0, 0),
132 SND_SOC_DAPM_DAC("RDAC", NULL, SND_SOC_NOPM, 0, 0),
133 SND_SOC_DAPM_SUPPLY("PWND", RT9120_REG_SYSCTL, 6, 1,
134 internal_power_event, SND_SOC_DAPM_PRE_PMU |
135 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
136 SND_SOC_DAPM_PGA("SPKL PA", SND_SOC_NOPM, 0, 0, NULL, 0),
137 SND_SOC_DAPM_PGA("SPKR PA", SND_SOC_NOPM, 0, 0, NULL, 0),
138 SND_SOC_DAPM_OUTPUT("SPKL"),
139 SND_SOC_DAPM_OUTPUT("SPKR"),
140};
141
142static const struct snd_soc_dapm_route rt9120_dapm_routes[] = {
143 { "DMIX", NULL, "AIF Playback" },
144 /* SPKL */
145 { "LDAC", NULL, "PWND" },
146 { "LDAC", NULL, "DMIX" },
147 { "SPKL PA", NULL, "LDAC" },
148 { "SPKL", NULL, "SPKL PA" },
149 /* SPKR */
150 { "RDAC", NULL, "PWND" },
151 { "RDAC", NULL, "DMIX" },
152 { "SPKR PA", NULL, "RDAC" },
153 { "SPKR", NULL, "SPKR PA" },
154 /* Cap */
155 { "AIF Capture", NULL, "LDAC" },
156 { "AIF Capture", NULL, "RDAC" },
157};
158
159static int rt9120_codec_probe(struct snd_soc_component *comp)
160{
161 struct rt9120_data *data = snd_soc_component_get_drvdata(c: comp);
162
163 snd_soc_component_init_regmap(component: comp, regmap: data->regmap);
164
165 pm_runtime_get_sync(dev: comp->dev);
166
167 /* Internal setting */
168 if (data->chip_idx == CHIP_IDX_RT9120S) {
169 snd_soc_component_write(component: comp, RT9120_REG_INTERCFG, val: 0xde);
170 snd_soc_component_write(component: comp, RT9120_REG_INTERNAL0, val: 0x66);
171 } else
172 snd_soc_component_write(component: comp, RT9120_REG_INTERNAL0, val: 0x04);
173
174 pm_runtime_mark_last_busy(dev: comp->dev);
175 pm_runtime_put(dev: comp->dev);
176
177 return 0;
178}
179
180static int rt9120_codec_suspend(struct snd_soc_component *comp)
181{
182 return pm_runtime_force_suspend(dev: comp->dev);
183}
184
185static int rt9120_codec_resume(struct snd_soc_component *comp)
186{
187 return pm_runtime_force_resume(dev: comp->dev);
188}
189
190static const struct snd_soc_component_driver rt9120_component_driver = {
191 .probe = rt9120_codec_probe,
192 .suspend = rt9120_codec_suspend,
193 .resume = rt9120_codec_resume,
194 .controls = rt9120_snd_controls,
195 .num_controls = ARRAY_SIZE(rt9120_snd_controls),
196 .dapm_widgets = rt9120_dapm_widgets,
197 .num_dapm_widgets = ARRAY_SIZE(rt9120_dapm_widgets),
198 .dapm_routes = rt9120_dapm_routes,
199 .num_dapm_routes = ARRAY_SIZE(rt9120_dapm_routes),
200 .endianness = 1,
201};
202
203static int rt9120_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
204{
205 struct snd_soc_component *comp = dai->component;
206 unsigned int format;
207
208 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
209 case SND_SOC_DAIFMT_I2S:
210 format = RT9120_CFG_FMT_I2S;
211 break;
212 case SND_SOC_DAIFMT_LEFT_J:
213 format = RT9120_CFG_FMT_LEFTJ;
214 break;
215 case SND_SOC_DAIFMT_RIGHT_J:
216 format = RT9120_CFG_FMT_RIGHTJ;
217 break;
218 case SND_SOC_DAIFMT_DSP_A:
219 format = RT9120_CFG_FMT_DSPA;
220 break;
221 case SND_SOC_DAIFMT_DSP_B:
222 format = RT9120_CFG_FMT_DSPB;
223 break;
224 default:
225 dev_err(dai->dev, "Unknown dai format\n");
226 return -EINVAL;
227 }
228
229 snd_soc_component_update_bits(component: comp, RT9120_REG_I2SFMT,
230 RT9120_I2SFMT_MASK,
231 val: format << RT9120_I2SFMT_SHIFT);
232 return 0;
233}
234
235static int rt9120_hw_params(struct snd_pcm_substream *substream,
236 struct snd_pcm_hw_params *param,
237 struct snd_soc_dai *dai)
238{
239 struct snd_soc_component *comp = dai->component;
240 unsigned int param_width, param_slot_width, auto_sync;
241 int width, fs;
242
243 switch (width = params_width(p: param)) {
244 case 16:
245 param_width = RT9120_CFG_AUDBIT_16;
246 break;
247 case 20:
248 param_width = RT9120_CFG_AUDBIT_20;
249 break;
250 case 24:
251 case 32:
252 param_width = RT9120_CFG_AUDBIT_24;
253 break;
254 default:
255 dev_err(dai->dev, "Unsupported data width [%d]\n", width);
256 return -EINVAL;
257 }
258
259 snd_soc_component_update_bits(component: comp, RT9120_REG_I2SFMT,
260 RT9120_AUDBIT_MASK, val: param_width);
261
262 switch (width = params_physical_width(p: param)) {
263 case 16:
264 param_slot_width = RT9120_CFG_WORDLEN_16;
265 break;
266 case 24:
267 param_slot_width = RT9120_CFG_WORDLEN_24;
268 break;
269 case 32:
270 param_slot_width = RT9120_CFG_WORDLEN_32;
271 break;
272 default:
273 dev_err(dai->dev, "Unsupported slot width [%d]\n", width);
274 return -EINVAL;
275 }
276
277 snd_soc_component_update_bits(component: comp, RT9120_REG_I2SWL,
278 RT9120_AUDWL_MASK, val: param_slot_width);
279
280 fs = width * params_channels(p: param);
281 /* If fs is divided by 48, disable auto sync */
282 if (fs % 48 == 0)
283 auto_sync = 0;
284 else
285 auto_sync = RT9120_AUTOSYNC_MASK;
286
287 snd_soc_component_update_bits(component: comp, RT9120_REG_DIGCFG,
288 RT9120_AUTOSYNC_MASK, val: auto_sync);
289 return 0;
290}
291
292static const struct snd_soc_dai_ops rt9120_dai_ops = {
293 .set_fmt = rt9120_set_fmt,
294 .hw_params = rt9120_hw_params,
295};
296
297static struct snd_soc_dai_driver rt9120_dai = {
298 .name = "rt9120_aif",
299 .playback = {
300 .stream_name = "AIF Playback",
301 .rates = RT9120_RATES_MASK,
302 .formats = RT9120_FMTS_MASK,
303 .rate_max = 192000,
304 .rate_min = 8000,
305 .channels_min = 1,
306 .channels_max = 2,
307 },
308 .capture = {
309 .stream_name = "AIF Capture",
310 .rates = RT9120_RATES_MASK,
311 .formats = RT9120_FMTS_MASK,
312 .rate_max = 192000,
313 .rate_min = 8000,
314 .channels_min = 1,
315 .channels_max = 2,
316 },
317 .ops = &rt9120_dai_ops,
318 .symmetric_rate = 1,
319 .symmetric_sample_bits = 1,
320};
321
322static const struct regmap_range rt9120_rd_yes_ranges[] = {
323 regmap_reg_range(0x00, 0x0C),
324 regmap_reg_range(0x10, 0x15),
325 regmap_reg_range(0x20, 0x27),
326 regmap_reg_range(0x30, 0x38),
327 regmap_reg_range(0x3A, 0x40),
328 regmap_reg_range(0x63, 0x63),
329 regmap_reg_range(0x65, 0x65),
330 regmap_reg_range(0x69, 0x69),
331 regmap_reg_range(0x6C, 0x6C),
332 regmap_reg_range(0xF8, 0xF8)
333};
334
335static const struct regmap_access_table rt9120_rd_table = {
336 .yes_ranges = rt9120_rd_yes_ranges,
337 .n_yes_ranges = ARRAY_SIZE(rt9120_rd_yes_ranges),
338};
339
340static const struct regmap_range rt9120_wr_yes_ranges[] = {
341 regmap_reg_range(0x00, 0x00),
342 regmap_reg_range(0x02, 0x0A),
343 regmap_reg_range(0x10, 0x15),
344 regmap_reg_range(0x20, 0x27),
345 regmap_reg_range(0x30, 0x38),
346 regmap_reg_range(0x3A, 0x3D),
347 regmap_reg_range(0x40, 0x40),
348 regmap_reg_range(0x63, 0x63),
349 regmap_reg_range(0x65, 0x65),
350 regmap_reg_range(0x69, 0x69),
351 regmap_reg_range(0x6C, 0x6C),
352 regmap_reg_range(0xF8, 0xF8)
353};
354
355static const struct regmap_access_table rt9120_wr_table = {
356 .yes_ranges = rt9120_wr_yes_ranges,
357 .n_yes_ranges = ARRAY_SIZE(rt9120_wr_yes_ranges),
358};
359
360static bool rt9120_volatile_reg(struct device *dev, unsigned int reg)
361{
362 switch (reg) {
363 case 0x00 ... 0x01:
364 case 0x10:
365 case 0x30 ... 0x40:
366 return true;
367 default:
368 return false;
369 }
370}
371
372static int rt9120_get_reg_size(unsigned int reg)
373{
374 switch (reg) {
375 case 0x00:
376 case 0x20 ... 0x27:
377 return 2;
378 case 0x30 ... 0x3D:
379 return 3;
380 case 0x3E ... 0x3F:
381 return 4;
382 default:
383 return 1;
384 }
385}
386
387static int rt9120_reg_read(void *context, unsigned int reg, unsigned int *val)
388{
389 struct rt9120_data *data = context;
390 struct i2c_client *i2c = to_i2c_client(data->dev);
391 int size = rt9120_get_reg_size(reg);
392 u8 raw[4] = {0};
393 int ret;
394
395 ret = i2c_smbus_read_i2c_block_data(client: i2c, command: reg, length: size, values: raw);
396 if (ret < 0)
397 return ret;
398 else if (ret != size)
399 return -EIO;
400
401 switch (size) {
402 case 4:
403 *val = be32_to_cpup(p: (__be32 *)raw);
404 break;
405 case 3:
406 *val = raw[0] << 16 | raw[1] << 8 | raw[2];
407 break;
408 case 2:
409 *val = be16_to_cpup(p: (__be16 *)raw);
410 break;
411 default:
412 *val = raw[0];
413 }
414
415 return 0;
416}
417
418static int rt9120_reg_write(void *context, unsigned int reg, unsigned int val)
419{
420 struct rt9120_data *data = context;
421 struct i2c_client *i2c = to_i2c_client(data->dev);
422 int size = rt9120_get_reg_size(reg);
423 __be32 be32_val;
424 u8 *rawp = (u8 *)&be32_val;
425 int offs = 4 - size;
426
427 be32_val = cpu_to_be32(val);
428 return i2c_smbus_write_i2c_block_data(client: i2c, command: reg, length: size, values: rawp + offs);
429}
430
431static const struct reg_default rt9120_reg_defaults[] = {
432 { .reg = 0x02, .def = 0x02 },
433 { .reg = 0x03, .def = 0xf2 },
434 { .reg = 0x04, .def = 0x01 },
435 { .reg = 0x05, .def = 0xc0 },
436 { .reg = 0x06, .def = 0x28 },
437 { .reg = 0x07, .def = 0x04 },
438 { .reg = 0x08, .def = 0xff },
439 { .reg = 0x09, .def = 0x01 },
440 { .reg = 0x0a, .def = 0x01 },
441 { .reg = 0x0b, .def = 0x00 },
442 { .reg = 0x0c, .def = 0x04 },
443 { .reg = 0x11, .def = 0x30 },
444 { .reg = 0x12, .def = 0x08 },
445 { .reg = 0x13, .def = 0x12 },
446 { .reg = 0x14, .def = 0x09 },
447 { .reg = 0x15, .def = 0x00 },
448 { .reg = 0x20, .def = 0x7ff },
449 { .reg = 0x21, .def = 0x180 },
450 { .reg = 0x22, .def = 0x180 },
451 { .reg = 0x23, .def = 0x00 },
452 { .reg = 0x24, .def = 0x80 },
453 { .reg = 0x25, .def = 0x180 },
454 { .reg = 0x26, .def = 0x640 },
455 { .reg = 0x27, .def = 0x180 },
456 { .reg = 0x63, .def = 0x5e },
457 { .reg = 0x65, .def = 0x66 },
458 { .reg = 0x6c, .def = 0xe0 },
459 { .reg = 0xf8, .def = 0x44 },
460};
461
462static const struct regmap_config rt9120_regmap_config = {
463 .reg_bits = 8,
464 .val_bits = 32,
465 .max_register = RT9120_REG_DIGCFG,
466 .reg_defaults = rt9120_reg_defaults,
467 .num_reg_defaults = ARRAY_SIZE(rt9120_reg_defaults),
468 .cache_type = REGCACHE_RBTREE,
469
470 .reg_read = rt9120_reg_read,
471 .reg_write = rt9120_reg_write,
472
473 .volatile_reg = rt9120_volatile_reg,
474 .wr_table = &rt9120_wr_table,
475 .rd_table = &rt9120_rd_table,
476};
477
478static int rt9120_check_vendor_info(struct rt9120_data *data)
479{
480 unsigned int devid;
481 int ret;
482
483 ret = regmap_read(map: data->regmap, RT9120_REG_DEVID, val: &devid);
484 if (ret)
485 return ret;
486
487 devid = FIELD_GET(RT9120_VID_MASK, devid);
488 switch (devid) {
489 case RT9120_VENDOR_ID:
490 data->chip_idx = CHIP_IDX_RT9120;
491 break;
492 case RT9120S_VENDOR_ID:
493 data->chip_idx = CHIP_IDX_RT9120S;
494 break;
495 default:
496 dev_err(data->dev, "DEVID not correct [0x%0x]\n", devid);
497 return -ENODEV;
498 }
499
500 return 0;
501}
502
503static int rt9120_do_register_reset(struct rt9120_data *data)
504{
505 int ret;
506
507 ret = regmap_write(map: data->regmap, RT9120_REG_SWRESET,
508 RT9120_SWRST_MASK);
509 if (ret)
510 return ret;
511
512 msleep(RT9120_RESET_WAITMS);
513 return 0;
514}
515
516static int rt9120_probe(struct i2c_client *i2c)
517{
518 struct rt9120_data *data;
519 struct regulator *dvdd_supply;
520 int dvdd_supply_volt, ret;
521
522 data = devm_kzalloc(dev: &i2c->dev, size: sizeof(*data), GFP_KERNEL);
523 if (!data)
524 return -ENOMEM;
525
526 data->dev = &i2c->dev;
527 i2c_set_clientdata(client: i2c, data);
528
529 data->pwdnn_gpio = devm_gpiod_get_optional(dev: &i2c->dev, con_id: "pwdnn",
530 flags: GPIOD_OUT_HIGH);
531 if (IS_ERR(ptr: data->pwdnn_gpio)) {
532 dev_err(&i2c->dev, "Failed to initialize 'pwdnn' gpio\n");
533 return PTR_ERR(ptr: data->pwdnn_gpio);
534 } else if (data->pwdnn_gpio) {
535 dev_dbg(&i2c->dev, "'pwdnn' from low to high, wait chip on\n");
536 msleep(RT9120_CHIPON_WAITMS);
537 }
538
539 data->regmap = devm_regmap_init(&i2c->dev, NULL, data,
540 &rt9120_regmap_config);
541 if (IS_ERR(ptr: data->regmap)) {
542 ret = PTR_ERR(ptr: data->regmap);
543 dev_err(&i2c->dev, "Failed to init regmap [%d]\n", ret);
544 return ret;
545 }
546
547 ret = rt9120_check_vendor_info(data);
548 if (ret) {
549 dev_err(&i2c->dev, "Failed to check vendor info\n");
550 return ret;
551 }
552
553 ret = rt9120_do_register_reset(data);
554 if (ret) {
555 dev_err(&i2c->dev, "Failed to do register reset\n");
556 return ret;
557 }
558
559 dvdd_supply = devm_regulator_get(dev: &i2c->dev, id: "dvdd");
560 if (IS_ERR(ptr: dvdd_supply)) {
561 dev_err(&i2c->dev, "No dvdd regulator found\n");
562 return PTR_ERR(ptr: dvdd_supply);
563 }
564
565 dvdd_supply_volt = regulator_get_voltage(regulator: dvdd_supply);
566 if (dvdd_supply_volt <= RT9120_LVAPP_THRESUV) {
567 dev_dbg(&i2c->dev, "dvdd low voltage design\n");
568 ret = regmap_update_bits(map: data->regmap, RT9120_REG_UVPOPT,
569 RT9120_DVDD_UVSEL_MASK, val: 0);
570 if (ret) {
571 dev_err(&i2c->dev, "Failed to config dvdd uvsel\n");
572 return ret;
573 }
574 }
575
576 pm_runtime_set_autosuspend_delay(dev: &i2c->dev, delay: 1000);
577 pm_runtime_use_autosuspend(dev: &i2c->dev);
578 pm_runtime_set_active(dev: &i2c->dev);
579 pm_runtime_mark_last_busy(dev: &i2c->dev);
580 pm_runtime_enable(dev: &i2c->dev);
581
582 return devm_snd_soc_register_component(dev: &i2c->dev,
583 component_driver: &rt9120_component_driver,
584 dai_drv: &rt9120_dai, num_dai: 1);
585}
586
587static void rt9120_remove(struct i2c_client *i2c)
588{
589 pm_runtime_disable(dev: &i2c->dev);
590 pm_runtime_set_suspended(dev: &i2c->dev);
591}
592
593static int __maybe_unused rt9120_runtime_suspend(struct device *dev)
594{
595 struct rt9120_data *data = dev_get_drvdata(dev);
596
597 if (data->pwdnn_gpio) {
598 regcache_cache_only(map: data->regmap, enable: true);
599 regcache_mark_dirty(map: data->regmap);
600 gpiod_set_value(desc: data->pwdnn_gpio, value: 0);
601 }
602
603 return 0;
604}
605
606static int __maybe_unused rt9120_runtime_resume(struct device *dev)
607{
608 struct rt9120_data *data = dev_get_drvdata(dev);
609
610 if (data->pwdnn_gpio) {
611 gpiod_set_value(desc: data->pwdnn_gpio, value: 1);
612 msleep(RT9120_CHIPON_WAITMS);
613 regcache_cache_only(map: data->regmap, enable: false);
614 regcache_sync(map: data->regmap);
615 }
616
617 return 0;
618}
619
620static const struct dev_pm_ops rt9120_pm_ops = {
621 SET_RUNTIME_PM_OPS(rt9120_runtime_suspend, rt9120_runtime_resume, NULL)
622};
623
624static const struct of_device_id __maybe_unused rt9120_device_table[] = {
625 { .compatible = "richtek,rt9120", },
626 { }
627};
628MODULE_DEVICE_TABLE(of, rt9120_device_table);
629
630static struct i2c_driver rt9120_driver = {
631 .driver = {
632 .name = "rt9120",
633 .of_match_table = rt9120_device_table,
634 .pm = &rt9120_pm_ops,
635 },
636 .probe = rt9120_probe,
637 .remove = rt9120_remove,
638};
639module_i2c_driver(rt9120_driver);
640
641MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
642MODULE_DESCRIPTION("RT9120 Audio Amplifier Driver");
643MODULE_LICENSE("GPL");
644

source code of linux/sound/soc/codecs/rt9120.c