xref: /openbmc/linux/sound/soc/codecs/rt9120.c (revision 9abcd240)
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 
70 enum {
71 	CHIP_IDX_RT9120 = 0,
72 	CHIP_IDX_RT9120S,
73 	CHIP_IDX_MAX
74 };
75 
76 struct 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] */
84 static const DECLARE_TLV_DB_SCALE(digital_tlv, -1039375, 625, 1);
85 
86 /* {6, 8, 10, 12, 13, 14, 15, 16}dB */
87 static 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 
92 static const char * const sdo_select_text[] = {
93 	"None", "INTF", "Final", "RMS Detect"
94 };
95 
96 static 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 
100 static 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 
internal_power_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * kcontrol,int event)107 static 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(w->dapm);
111 
112 	switch (event) {
113 	case SND_SOC_DAPM_PRE_PMU:
114 		snd_soc_component_write(comp, RT9120_REG_ERRRPT, 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 
129 static 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 
142 static 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 
rt9120_codec_probe(struct snd_soc_component * comp)159 static int rt9120_codec_probe(struct snd_soc_component *comp)
160 {
161 	struct rt9120_data *data = snd_soc_component_get_drvdata(comp);
162 
163 	snd_soc_component_init_regmap(comp, data->regmap);
164 
165 	pm_runtime_get_sync(comp->dev);
166 
167 	/* Internal setting */
168 	if (data->chip_idx == CHIP_IDX_RT9120S) {
169 		snd_soc_component_write(comp, RT9120_REG_INTERCFG, 0xde);
170 		snd_soc_component_write(comp, RT9120_REG_INTERNAL0, 0x66);
171 	} else
172 		snd_soc_component_write(comp, RT9120_REG_INTERNAL0, 0x04);
173 
174 	pm_runtime_mark_last_busy(comp->dev);
175 	pm_runtime_put(comp->dev);
176 
177 	return 0;
178 }
179 
rt9120_codec_suspend(struct snd_soc_component * comp)180 static int rt9120_codec_suspend(struct snd_soc_component *comp)
181 {
182 	return pm_runtime_force_suspend(comp->dev);
183 }
184 
rt9120_codec_resume(struct snd_soc_component * comp)185 static int rt9120_codec_resume(struct snd_soc_component *comp)
186 {
187 	return pm_runtime_force_resume(comp->dev);
188 }
189 
190 static 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 
rt9120_set_fmt(struct snd_soc_dai * dai,unsigned int fmt)203 static 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(comp, RT9120_REG_I2SFMT,
230 				      RT9120_I2SFMT_MASK,
231 				      format << RT9120_I2SFMT_SHIFT);
232 	return 0;
233 }
234 
rt9120_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * param,struct snd_soc_dai * dai)235 static 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(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(comp, RT9120_REG_I2SFMT,
260 				      RT9120_AUDBIT_MASK, param_width);
261 
262 	switch (width = params_physical_width(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(comp, RT9120_REG_I2SWL,
278 				      RT9120_AUDWL_MASK, param_slot_width);
279 
280 	fs = width * params_channels(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(comp, RT9120_REG_DIGCFG,
288 				      RT9120_AUTOSYNC_MASK, auto_sync);
289 	return 0;
290 }
291 
292 static const struct snd_soc_dai_ops rt9120_dai_ops = {
293 	.set_fmt = rt9120_set_fmt,
294 	.hw_params = rt9120_hw_params,
295 };
296 
297 static 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 
322 static 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 
335 static 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 
340 static 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 
355 static 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 
rt9120_volatile_reg(struct device * dev,unsigned int reg)360 static 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 
rt9120_get_reg_size(unsigned int reg)372 static 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 
rt9120_reg_read(void * context,unsigned int reg,unsigned int * val)387 static 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(i2c, reg, size, 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((__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((__be16 *)raw);
410 		break;
411 	default:
412 		*val = raw[0];
413 	}
414 
415 	return 0;
416 }
417 
rt9120_reg_write(void * context,unsigned int reg,unsigned int val)418 static 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(i2c, reg, size, rawp + offs);
429 }
430 
431 static 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 
462 static 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 
rt9120_check_vendor_info(struct rt9120_data * data)478 static int rt9120_check_vendor_info(struct rt9120_data *data)
479 {
480 	unsigned int devid;
481 	int ret;
482 
483 	ret = regmap_read(data->regmap, RT9120_REG_DEVID, &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 
rt9120_do_register_reset(struct rt9120_data * data)503 static int rt9120_do_register_reset(struct rt9120_data *data)
504 {
505 	int ret;
506 
507 	ret = regmap_write(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 
rt9120_probe(struct i2c_client * i2c)516 static 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(&i2c->dev, sizeof(*data), GFP_KERNEL);
523 	if (!data)
524 		return -ENOMEM;
525 
526 	data->dev = &i2c->dev;
527 	i2c_set_clientdata(i2c, data);
528 
529 	data->pwdnn_gpio = devm_gpiod_get_optional(&i2c->dev, "pwdnn",
530 						   GPIOD_OUT_HIGH);
531 	if (IS_ERR(data->pwdnn_gpio)) {
532 		dev_err(&i2c->dev, "Failed to initialize 'pwdnn' gpio\n");
533 		return PTR_ERR(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(data->regmap)) {
542 		ret = PTR_ERR(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(&i2c->dev, "dvdd");
560 	if (IS_ERR(dvdd_supply)) {
561 		dev_err(&i2c->dev, "No dvdd regulator found\n");
562 		return PTR_ERR(dvdd_supply);
563 	}
564 
565 	dvdd_supply_volt = regulator_get_voltage(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(data->regmap, RT9120_REG_UVPOPT,
569 					 RT9120_DVDD_UVSEL_MASK, 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(&i2c->dev, 1000);
577 	pm_runtime_use_autosuspend(&i2c->dev);
578 	pm_runtime_set_active(&i2c->dev);
579 	pm_runtime_mark_last_busy(&i2c->dev);
580 	pm_runtime_enable(&i2c->dev);
581 
582 	return devm_snd_soc_register_component(&i2c->dev,
583 					       &rt9120_component_driver,
584 					       &rt9120_dai, 1);
585 }
586 
rt9120_remove(struct i2c_client * i2c)587 static void rt9120_remove(struct i2c_client *i2c)
588 {
589 	pm_runtime_disable(&i2c->dev);
590 	pm_runtime_set_suspended(&i2c->dev);
591 }
592 
rt9120_runtime_suspend(struct device * dev)593 static 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(data->regmap, true);
599 		regcache_mark_dirty(data->regmap);
600 		gpiod_set_value(data->pwdnn_gpio, 0);
601 	}
602 
603 	return 0;
604 }
605 
rt9120_runtime_resume(struct device * dev)606 static 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(data->pwdnn_gpio, 1);
612 		msleep(RT9120_CHIPON_WAITMS);
613 		regcache_cache_only(data->regmap, false);
614 		regcache_sync(data->regmap);
615 	}
616 
617 	return 0;
618 }
619 
620 static const struct dev_pm_ops rt9120_pm_ops = {
621 	SET_RUNTIME_PM_OPS(rt9120_runtime_suspend, rt9120_runtime_resume, NULL)
622 };
623 
624 static const struct of_device_id __maybe_unused rt9120_device_table[] = {
625 	{ .compatible = "richtek,rt9120", },
626 	{ }
627 };
628 MODULE_DEVICE_TABLE(of, rt9120_device_table);
629 
630 static 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 };
639 module_i2c_driver(rt9120_driver);
640 
641 MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
642 MODULE_DESCRIPTION("RT9120 Audio Amplifier Driver");
643 MODULE_LICENSE("GPL");
644