1 // SPDX-License-Identifier: GPL-2.0-only
3 * wm8770.c -- WM8770 ALSA SoC Audio driver
5 * Copyright 2010 Wolfson Microelectronics plc
7 * Author: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
10 #include <linux/module.h>
11 #include <linux/moduleparam.h>
12 #include <linux/init.h>
13 #include <linux/delay.h>
14 #include <linux/of_device.h>
16 #include <linux/spi/spi.h>
17 #include <linux/regmap.h>
18 #include <linux/regulator/consumer.h>
19 #include <linux/slab.h>
20 #include <sound/core.h>
21 #include <sound/pcm.h>
22 #include <sound/pcm_params.h>
23 #include <sound/soc.h>
24 #include <sound/initval.h>
25 #include <sound/tlv.h>
29 #define WM8770_NUM_SUPPLIES 3
30 static const char *wm8770_supply_names[WM8770_NUM_SUPPLIES] = {
36 static const struct reg_default wm8770_reg_defaults[] = {
70 static bool wm8770_volatile_reg(struct device *dev, unsigned int reg)
81 struct regmap *regmap;
82 struct regulator_bulk_data supplies[WM8770_NUM_SUPPLIES];
83 struct notifier_block disable_nb[WM8770_NUM_SUPPLIES];
84 struct snd_soc_component *component;
88 static int vout12supply_event(struct snd_soc_dapm_widget *w,
89 struct snd_kcontrol *kcontrol, int event);
90 static int vout34supply_event(struct snd_soc_dapm_widget *w,
91 struct snd_kcontrol *kcontrol, int event);
94 * We can't use the same notifier block for more than one supply and
95 * there's no way I can see to get from a callback to the caller
96 * except container_of().
98 #define WM8770_REGULATOR_EVENT(n) \
99 static int wm8770_regulator_event_##n(struct notifier_block *nb, \
100 unsigned long event, void *data) \
102 struct wm8770_priv *wm8770 = container_of(nb, struct wm8770_priv, \
104 if (event & REGULATOR_EVENT_DISABLE) { \
105 regcache_mark_dirty(wm8770->regmap); \
110 WM8770_REGULATOR_EVENT(0)
111 WM8770_REGULATOR_EVENT(1)
112 WM8770_REGULATOR_EVENT(2)
114 static const DECLARE_TLV_DB_SCALE(adc_tlv, -1200, 100, 0);
115 static const DECLARE_TLV_DB_SCALE(dac_dig_tlv, -12750, 50, 1);
116 static const DECLARE_TLV_DB_SCALE(dac_alg_tlv, -12700, 100, 1);
118 static const char *dac_phase_text[][2] = {
119 { "DAC1 Normal", "DAC1 Inverted" },
120 { "DAC2 Normal", "DAC2 Inverted" },
121 { "DAC3 Normal", "DAC3 Inverted" },
122 { "DAC4 Normal", "DAC4 Inverted" },
125 static const struct soc_enum dac_phase[] = {
126 SOC_ENUM_DOUBLE(WM8770_DACPHASE, 0, 1, 2, dac_phase_text[0]),
127 SOC_ENUM_DOUBLE(WM8770_DACPHASE, 2, 3, 2, dac_phase_text[1]),
128 SOC_ENUM_DOUBLE(WM8770_DACPHASE, 4, 5, 2, dac_phase_text[2]),
129 SOC_ENUM_DOUBLE(WM8770_DACPHASE, 6, 7, 2, dac_phase_text[3]),
132 static const struct snd_kcontrol_new wm8770_snd_controls[] = {
133 /* global DAC playback controls */
134 SOC_SINGLE_TLV("DAC Playback Volume", WM8770_MSDIGVOL, 0, 255, 0,
136 SOC_SINGLE("DAC Playback Switch", WM8770_DACMUTE, 4, 1, 1),
137 SOC_SINGLE("DAC Playback ZC Switch", WM8770_DACCTRL1, 0, 1, 0),
139 /* global VOUT playback controls */
140 SOC_SINGLE_TLV("VOUT Playback Volume", WM8770_MSALGVOL, 0, 127, 0,
142 SOC_SINGLE("VOUT Playback ZC Switch", WM8770_MSALGVOL, 7, 1, 0),
144 /* VOUT1/2/3/4 specific controls */
145 SOC_DOUBLE_R_TLV("VOUT1 Playback Volume", WM8770_VOUT1LVOL,
146 WM8770_VOUT1RVOL, 0, 127, 0, dac_alg_tlv),
147 SOC_DOUBLE_R("VOUT1 Playback ZC Switch", WM8770_VOUT1LVOL,
148 WM8770_VOUT1RVOL, 7, 1, 0),
149 SOC_DOUBLE_R_TLV("VOUT2 Playback Volume", WM8770_VOUT2LVOL,
150 WM8770_VOUT2RVOL, 0, 127, 0, dac_alg_tlv),
151 SOC_DOUBLE_R("VOUT2 Playback ZC Switch", WM8770_VOUT2LVOL,
152 WM8770_VOUT2RVOL, 7, 1, 0),
153 SOC_DOUBLE_R_TLV("VOUT3 Playback Volume", WM8770_VOUT3LVOL,
154 WM8770_VOUT3RVOL, 0, 127, 0, dac_alg_tlv),
155 SOC_DOUBLE_R("VOUT3 Playback ZC Switch", WM8770_VOUT3LVOL,
156 WM8770_VOUT3RVOL, 7, 1, 0),
157 SOC_DOUBLE_R_TLV("VOUT4 Playback Volume", WM8770_VOUT4LVOL,
158 WM8770_VOUT4RVOL, 0, 127, 0, dac_alg_tlv),
159 SOC_DOUBLE_R("VOUT4 Playback ZC Switch", WM8770_VOUT4LVOL,
160 WM8770_VOUT4RVOL, 7, 1, 0),
162 /* DAC1/2/3/4 specific controls */
163 SOC_DOUBLE_R_TLV("DAC1 Playback Volume", WM8770_DAC1LVOL,
164 WM8770_DAC1RVOL, 0, 255, 0, dac_dig_tlv),
165 SOC_SINGLE("DAC1 Deemphasis Switch", WM8770_DACCTRL2, 0, 1, 0),
166 SOC_ENUM("DAC1 Phase", dac_phase[0]),
167 SOC_DOUBLE_R_TLV("DAC2 Playback Volume", WM8770_DAC2LVOL,
168 WM8770_DAC2RVOL, 0, 255, 0, dac_dig_tlv),
169 SOC_SINGLE("DAC2 Deemphasis Switch", WM8770_DACCTRL2, 1, 1, 0),
170 SOC_ENUM("DAC2 Phase", dac_phase[1]),
171 SOC_DOUBLE_R_TLV("DAC3 Playback Volume", WM8770_DAC3LVOL,
172 WM8770_DAC3RVOL, 0, 255, 0, dac_dig_tlv),
173 SOC_SINGLE("DAC3 Deemphasis Switch", WM8770_DACCTRL2, 2, 1, 0),
174 SOC_ENUM("DAC3 Phase", dac_phase[2]),
175 SOC_DOUBLE_R_TLV("DAC4 Playback Volume", WM8770_DAC4LVOL,
176 WM8770_DAC4RVOL, 0, 255, 0, dac_dig_tlv),
177 SOC_SINGLE("DAC4 Deemphasis Switch", WM8770_DACCTRL2, 3, 1, 0),
178 SOC_ENUM("DAC4 Phase", dac_phase[3]),
180 /* ADC specific controls */
181 SOC_DOUBLE_R_TLV("Capture Volume", WM8770_ADCLCTRL, WM8770_ADCRCTRL,
183 SOC_DOUBLE_R("Capture Switch", WM8770_ADCLCTRL, WM8770_ADCRCTRL,
187 SOC_SINGLE("ADC 128x Oversampling Switch", WM8770_MSTRCTRL, 3, 1, 0),
188 SOC_SINGLE("ADC Highpass Filter Switch", WM8770_IFACECTRL, 8, 1, 1)
191 static const char *ain_text[] = {
192 "AIN1", "AIN2", "AIN3", "AIN4",
193 "AIN5", "AIN6", "AIN7", "AIN8"
196 static SOC_ENUM_DOUBLE_DECL(ain_enum,
197 WM8770_ADCMUX, 0, 4, ain_text);
199 static const struct snd_kcontrol_new ain_mux =
200 SOC_DAPM_ENUM("Capture Mux", ain_enum);
202 static const struct snd_kcontrol_new vout1_mix_controls[] = {
203 SOC_DAPM_SINGLE("DAC1 Switch", WM8770_OUTMUX1, 0, 1, 0),
204 SOC_DAPM_SINGLE("AUX1 Switch", WM8770_OUTMUX1, 1, 1, 0),
205 SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX1, 2, 1, 0)
208 static const struct snd_kcontrol_new vout2_mix_controls[] = {
209 SOC_DAPM_SINGLE("DAC2 Switch", WM8770_OUTMUX1, 3, 1, 0),
210 SOC_DAPM_SINGLE("AUX2 Switch", WM8770_OUTMUX1, 4, 1, 0),
211 SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX1, 5, 1, 0)
214 static const struct snd_kcontrol_new vout3_mix_controls[] = {
215 SOC_DAPM_SINGLE("DAC3 Switch", WM8770_OUTMUX2, 0, 1, 0),
216 SOC_DAPM_SINGLE("AUX3 Switch", WM8770_OUTMUX2, 1, 1, 0),
217 SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX2, 2, 1, 0)
220 static const struct snd_kcontrol_new vout4_mix_controls[] = {
221 SOC_DAPM_SINGLE("DAC4 Switch", WM8770_OUTMUX2, 3, 1, 0),
222 SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX2, 4, 1, 0)
225 static const struct snd_soc_dapm_widget wm8770_dapm_widgets[] = {
226 SND_SOC_DAPM_INPUT("AUX1"),
227 SND_SOC_DAPM_INPUT("AUX2"),
228 SND_SOC_DAPM_INPUT("AUX3"),
230 SND_SOC_DAPM_INPUT("AIN1"),
231 SND_SOC_DAPM_INPUT("AIN2"),
232 SND_SOC_DAPM_INPUT("AIN3"),
233 SND_SOC_DAPM_INPUT("AIN4"),
234 SND_SOC_DAPM_INPUT("AIN5"),
235 SND_SOC_DAPM_INPUT("AIN6"),
236 SND_SOC_DAPM_INPUT("AIN7"),
237 SND_SOC_DAPM_INPUT("AIN8"),
239 SND_SOC_DAPM_MUX("Capture Mux", WM8770_ADCMUX, 8, 1, &ain_mux),
241 SND_SOC_DAPM_ADC("ADC", "Capture", WM8770_PWDNCTRL, 1, 1),
243 SND_SOC_DAPM_DAC("DAC1", "Playback", WM8770_PWDNCTRL, 2, 1),
244 SND_SOC_DAPM_DAC("DAC2", "Playback", WM8770_PWDNCTRL, 3, 1),
245 SND_SOC_DAPM_DAC("DAC3", "Playback", WM8770_PWDNCTRL, 4, 1),
246 SND_SOC_DAPM_DAC("DAC4", "Playback", WM8770_PWDNCTRL, 5, 1),
248 SND_SOC_DAPM_SUPPLY("VOUT12 Supply", SND_SOC_NOPM, 0, 0,
249 vout12supply_event, SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
250 SND_SOC_DAPM_SUPPLY("VOUT34 Supply", SND_SOC_NOPM, 0, 0,
251 vout34supply_event, SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
253 SND_SOC_DAPM_MIXER("VOUT1 Mixer", SND_SOC_NOPM, 0, 0,
254 vout1_mix_controls, ARRAY_SIZE(vout1_mix_controls)),
255 SND_SOC_DAPM_MIXER("VOUT2 Mixer", SND_SOC_NOPM, 0, 0,
256 vout2_mix_controls, ARRAY_SIZE(vout2_mix_controls)),
257 SND_SOC_DAPM_MIXER("VOUT3 Mixer", SND_SOC_NOPM, 0, 0,
258 vout3_mix_controls, ARRAY_SIZE(vout3_mix_controls)),
259 SND_SOC_DAPM_MIXER("VOUT4 Mixer", SND_SOC_NOPM, 0, 0,
260 vout4_mix_controls, ARRAY_SIZE(vout4_mix_controls)),
262 SND_SOC_DAPM_OUTPUT("VOUT1"),
263 SND_SOC_DAPM_OUTPUT("VOUT2"),
264 SND_SOC_DAPM_OUTPUT("VOUT3"),
265 SND_SOC_DAPM_OUTPUT("VOUT4")
268 static const struct snd_soc_dapm_route wm8770_intercon[] = {
269 { "Capture Mux", "AIN1", "AIN1" },
270 { "Capture Mux", "AIN2", "AIN2" },
271 { "Capture Mux", "AIN3", "AIN3" },
272 { "Capture Mux", "AIN4", "AIN4" },
273 { "Capture Mux", "AIN5", "AIN5" },
274 { "Capture Mux", "AIN6", "AIN6" },
275 { "Capture Mux", "AIN7", "AIN7" },
276 { "Capture Mux", "AIN8", "AIN8" },
278 { "ADC", NULL, "Capture Mux" },
280 { "VOUT1 Mixer", NULL, "VOUT12 Supply" },
281 { "VOUT1 Mixer", "DAC1 Switch", "DAC1" },
282 { "VOUT1 Mixer", "AUX1 Switch", "AUX1" },
283 { "VOUT1 Mixer", "Bypass Switch", "Capture Mux" },
285 { "VOUT2 Mixer", NULL, "VOUT12 Supply" },
286 { "VOUT2 Mixer", "DAC2 Switch", "DAC2" },
287 { "VOUT2 Mixer", "AUX2 Switch", "AUX2" },
288 { "VOUT2 Mixer", "Bypass Switch", "Capture Mux" },
290 { "VOUT3 Mixer", NULL, "VOUT34 Supply" },
291 { "VOUT3 Mixer", "DAC3 Switch", "DAC3" },
292 { "VOUT3 Mixer", "AUX3 Switch", "AUX3" },
293 { "VOUT3 Mixer", "Bypass Switch", "Capture Mux" },
295 { "VOUT4 Mixer", NULL, "VOUT34 Supply" },
296 { "VOUT4 Mixer", "DAC4 Switch", "DAC4" },
297 { "VOUT4 Mixer", "Bypass Switch", "Capture Mux" },
299 { "VOUT1", NULL, "VOUT1 Mixer" },
300 { "VOUT2", NULL, "VOUT2 Mixer" },
301 { "VOUT3", NULL, "VOUT3 Mixer" },
302 { "VOUT4", NULL, "VOUT4 Mixer" }
305 static int vout12supply_event(struct snd_soc_dapm_widget *w,
306 struct snd_kcontrol *kcontrol, int event)
308 struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
311 case SND_SOC_DAPM_PRE_PMU:
312 snd_soc_component_update_bits(component, WM8770_OUTMUX1, 0x180, 0);
314 case SND_SOC_DAPM_POST_PMD:
315 snd_soc_component_update_bits(component, WM8770_OUTMUX1, 0x180, 0x180);
322 static int vout34supply_event(struct snd_soc_dapm_widget *w,
323 struct snd_kcontrol *kcontrol, int event)
325 struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
328 case SND_SOC_DAPM_PRE_PMU:
329 snd_soc_component_update_bits(component, WM8770_OUTMUX2, 0x180, 0);
331 case SND_SOC_DAPM_POST_PMD:
332 snd_soc_component_update_bits(component, WM8770_OUTMUX2, 0x180, 0x180);
339 static int wm8770_reset(struct snd_soc_component *component)
341 return snd_soc_component_write(component, WM8770_RESET, 0);
344 static int wm8770_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
346 struct snd_soc_component *component;
349 component = dai->component;
351 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
352 case SND_SOC_DAIFMT_CBM_CFM:
355 case SND_SOC_DAIFMT_CBS_CFS:
363 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
364 case SND_SOC_DAIFMT_I2S:
367 case SND_SOC_DAIFMT_RIGHT_J:
369 case SND_SOC_DAIFMT_LEFT_J:
376 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
377 case SND_SOC_DAIFMT_NB_NF:
379 case SND_SOC_DAIFMT_IB_IF:
382 case SND_SOC_DAIFMT_IB_NF:
385 case SND_SOC_DAIFMT_NB_IF:
392 snd_soc_component_update_bits(component, WM8770_IFACECTRL, 0xf, iface);
393 snd_soc_component_update_bits(component, WM8770_MSTRCTRL, 0x100, master);
398 static const int mclk_ratios[] = {
407 static int wm8770_hw_params(struct snd_pcm_substream *substream,
408 struct snd_pcm_hw_params *params,
409 struct snd_soc_dai *dai)
411 struct snd_soc_component *component;
412 struct wm8770_priv *wm8770;
418 component = dai->component;
419 wm8770 = snd_soc_component_get_drvdata(component);
422 switch (params_width(params)) {
436 switch (substream->stream) {
437 case SNDRV_PCM_STREAM_PLAYBACK:
441 case SNDRV_PCM_STREAM_CAPTURE:
449 /* Only need to set MCLK/LRCLK ratio if we're master */
450 if (snd_soc_component_read(component, WM8770_MSTRCTRL) & 0x100) {
451 for (; i < ARRAY_SIZE(mclk_ratios); ++i) {
452 ratio = wm8770->sysclk / params_rate(params);
453 if (ratio == mclk_ratios[i])
457 if (i == ARRAY_SIZE(mclk_ratios)) {
458 dev_err(component->dev,
459 "Unable to configure MCLK ratio %d/%d\n",
460 wm8770->sysclk, params_rate(params));
464 dev_dbg(component->dev, "MCLK is %dfs\n", mclk_ratios[i]);
466 snd_soc_component_update_bits(component, WM8770_MSTRCTRL, 0x7 << shift,
470 snd_soc_component_update_bits(component, WM8770_IFACECTRL, 0x30, iface);
475 static int wm8770_mute(struct snd_soc_dai *dai, int mute, int direction)
477 struct snd_soc_component *component;
479 component = dai->component;
480 return snd_soc_component_update_bits(component, WM8770_DACMUTE, 0x10,
484 static int wm8770_set_sysclk(struct snd_soc_dai *dai,
485 int clk_id, unsigned int freq, int dir)
487 struct snd_soc_component *component;
488 struct wm8770_priv *wm8770;
490 component = dai->component;
491 wm8770 = snd_soc_component_get_drvdata(component);
492 wm8770->sysclk = freq;
496 static int wm8770_set_bias_level(struct snd_soc_component *component,
497 enum snd_soc_bias_level level)
500 struct wm8770_priv *wm8770;
502 wm8770 = snd_soc_component_get_drvdata(component);
505 case SND_SOC_BIAS_ON:
507 case SND_SOC_BIAS_PREPARE:
509 case SND_SOC_BIAS_STANDBY:
510 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
511 ret = regulator_bulk_enable(ARRAY_SIZE(wm8770->supplies),
514 dev_err(component->dev,
515 "Failed to enable supplies: %d\n",
520 regcache_sync(wm8770->regmap);
523 snd_soc_component_write(component, WM8770_PWDNCTRL, 0);
526 case SND_SOC_BIAS_OFF:
527 /* global powerdown */
528 snd_soc_component_write(component, WM8770_PWDNCTRL, 1);
529 regulator_bulk_disable(ARRAY_SIZE(wm8770->supplies),
537 #define WM8770_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
538 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
540 static const struct snd_soc_dai_ops wm8770_dai_ops = {
541 .mute_stream = wm8770_mute,
542 .hw_params = wm8770_hw_params,
543 .set_fmt = wm8770_set_fmt,
544 .set_sysclk = wm8770_set_sysclk,
545 .no_capture_mute = 1,
548 static struct snd_soc_dai_driver wm8770_dai = {
549 .name = "wm8770-hifi",
551 .stream_name = "Playback",
554 .rates = SNDRV_PCM_RATE_8000_192000,
555 .formats = WM8770_FORMATS
558 .stream_name = "Capture",
561 .rates = SNDRV_PCM_RATE_8000_96000,
562 .formats = WM8770_FORMATS
564 .ops = &wm8770_dai_ops,
568 static int wm8770_probe(struct snd_soc_component *component)
570 struct wm8770_priv *wm8770;
573 wm8770 = snd_soc_component_get_drvdata(component);
574 wm8770->component = component;
576 ret = regulator_bulk_enable(ARRAY_SIZE(wm8770->supplies),
579 dev_err(component->dev, "Failed to enable supplies: %d\n", ret);
583 ret = wm8770_reset(component);
585 dev_err(component->dev, "Failed to issue reset: %d\n", ret);
589 /* latch the volume update bits */
590 snd_soc_component_update_bits(component, WM8770_MSDIGVOL, 0x100, 0x100);
591 snd_soc_component_update_bits(component, WM8770_MSALGVOL, 0x100, 0x100);
592 snd_soc_component_update_bits(component, WM8770_VOUT1RVOL, 0x100, 0x100);
593 snd_soc_component_update_bits(component, WM8770_VOUT2RVOL, 0x100, 0x100);
594 snd_soc_component_update_bits(component, WM8770_VOUT3RVOL, 0x100, 0x100);
595 snd_soc_component_update_bits(component, WM8770_VOUT4RVOL, 0x100, 0x100);
596 snd_soc_component_update_bits(component, WM8770_DAC1RVOL, 0x100, 0x100);
597 snd_soc_component_update_bits(component, WM8770_DAC2RVOL, 0x100, 0x100);
598 snd_soc_component_update_bits(component, WM8770_DAC3RVOL, 0x100, 0x100);
599 snd_soc_component_update_bits(component, WM8770_DAC4RVOL, 0x100, 0x100);
602 snd_soc_component_update_bits(component, WM8770_DACMUTE, 0x10, 0x10);
605 regulator_bulk_disable(ARRAY_SIZE(wm8770->supplies), wm8770->supplies);
609 static const struct snd_soc_component_driver soc_component_dev_wm8770 = {
610 .probe = wm8770_probe,
611 .set_bias_level = wm8770_set_bias_level,
612 .controls = wm8770_snd_controls,
613 .num_controls = ARRAY_SIZE(wm8770_snd_controls),
614 .dapm_widgets = wm8770_dapm_widgets,
615 .num_dapm_widgets = ARRAY_SIZE(wm8770_dapm_widgets),
616 .dapm_routes = wm8770_intercon,
617 .num_dapm_routes = ARRAY_SIZE(wm8770_intercon),
618 .use_pmdown_time = 1,
620 .non_legacy_dai_naming = 1,
623 static const struct of_device_id wm8770_of_match[] = {
624 { .compatible = "wlf,wm8770", },
627 MODULE_DEVICE_TABLE(of, wm8770_of_match);
629 static const struct regmap_config wm8770_regmap = {
632 .max_register = WM8770_RESET,
634 .reg_defaults = wm8770_reg_defaults,
635 .num_reg_defaults = ARRAY_SIZE(wm8770_reg_defaults),
636 .cache_type = REGCACHE_RBTREE,
638 .volatile_reg = wm8770_volatile_reg,
641 static int wm8770_spi_probe(struct spi_device *spi)
643 struct wm8770_priv *wm8770;
646 wm8770 = devm_kzalloc(&spi->dev, sizeof(struct wm8770_priv),
651 for (i = 0; i < ARRAY_SIZE(wm8770->supplies); i++)
652 wm8770->supplies[i].supply = wm8770_supply_names[i];
654 ret = devm_regulator_bulk_get(&spi->dev, ARRAY_SIZE(wm8770->supplies),
657 dev_err(&spi->dev, "Failed to request supplies: %d\n", ret);
661 wm8770->disable_nb[0].notifier_call = wm8770_regulator_event_0;
662 wm8770->disable_nb[1].notifier_call = wm8770_regulator_event_1;
663 wm8770->disable_nb[2].notifier_call = wm8770_regulator_event_2;
665 /* This should really be moved into the regulator core */
666 for (i = 0; i < ARRAY_SIZE(wm8770->supplies); i++) {
667 ret = devm_regulator_register_notifier(
668 wm8770->supplies[i].consumer,
669 &wm8770->disable_nb[i]);
672 "Failed to register regulator notifier: %d\n",
677 wm8770->regmap = devm_regmap_init_spi(spi, &wm8770_regmap);
678 if (IS_ERR(wm8770->regmap))
679 return PTR_ERR(wm8770->regmap);
681 spi_set_drvdata(spi, wm8770);
683 ret = devm_snd_soc_register_component(&spi->dev,
684 &soc_component_dev_wm8770, &wm8770_dai, 1);
689 static struct spi_driver wm8770_spi_driver = {
692 .of_match_table = wm8770_of_match,
694 .probe = wm8770_spi_probe,
697 module_spi_driver(wm8770_spi_driver);
699 MODULE_DESCRIPTION("ASoC WM8770 driver");
700 MODULE_AUTHOR("Dimitris Papastamos <dp@opensource.wolfsonmicro.com>");
701 MODULE_LICENSE("GPL");