Loading...
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * max9850.c -- codec driver for max9850
4 *
5 * Copyright (C) 2011 taskit GmbH
6 *
7 * Author: Christian Glindkamp <christian.glindkamp@taskit.de>
8 *
9 * Initial development of this code was funded by
10 * MICRONIC Computer Systeme GmbH, https://www.mcsberlin.de/
11 */
12
13#include <linux/module.h>
14#include <linux/init.h>
15#include <linux/i2c.h>
16#include <linux/regmap.h>
17#include <linux/slab.h>
18#include <sound/pcm.h>
19#include <sound/pcm_params.h>
20#include <sound/soc.h>
21#include <sound/tlv.h>
22
23#include "max9850.h"
24
25struct max9850_priv {
26 struct regmap *regmap;
27 unsigned int sysclk;
28};
29
30/* these registers are not used at the moment but provided for the sake of
31 * completeness */
32static bool max9850_volatile_register(struct device *dev, unsigned int reg)
33{
34 switch (reg) {
35 case MAX9850_STATUSA:
36 case MAX9850_STATUSB:
37 return true;
38 default:
39 return false;
40 }
41}
42
43static const struct regmap_config max9850_regmap = {
44 .reg_bits = 8,
45 .val_bits = 8,
46
47 .max_register = MAX9850_DIGITAL_AUDIO,
48 .volatile_reg = max9850_volatile_register,
49 .cache_type = REGCACHE_RBTREE,
50};
51
52static const DECLARE_TLV_DB_RANGE(max9850_tlv,
53 0x18, 0x1f, TLV_DB_SCALE_ITEM(-7450, 400, 0),
54 0x20, 0x33, TLV_DB_SCALE_ITEM(-4150, 200, 0),
55 0x34, 0x37, TLV_DB_SCALE_ITEM(-150, 100, 0),
56 0x38, 0x3f, TLV_DB_SCALE_ITEM(250, 50, 0)
57);
58
59static const struct snd_kcontrol_new max9850_controls[] = {
60SOC_SINGLE_TLV("Headphone Volume", MAX9850_VOLUME, 0, 0x3f, 1, max9850_tlv),
61SOC_SINGLE("Headphone Switch", MAX9850_VOLUME, 7, 1, 1),
62SOC_SINGLE("Mono Switch", MAX9850_GENERAL_PURPOSE, 2, 1, 0),
63};
64
65static const struct snd_kcontrol_new max9850_mixer_controls[] = {
66 SOC_DAPM_SINGLE("Line In Switch", MAX9850_ENABLE, 1, 1, 0),
67};
68
69static const struct snd_soc_dapm_widget max9850_dapm_widgets[] = {
70SND_SOC_DAPM_SUPPLY("Charge Pump 1", MAX9850_ENABLE, 4, 0, NULL, 0),
71SND_SOC_DAPM_SUPPLY("Charge Pump 2", MAX9850_ENABLE, 5, 0, NULL, 0),
72SND_SOC_DAPM_SUPPLY("MCLK", MAX9850_ENABLE, 6, 0, NULL, 0),
73SND_SOC_DAPM_SUPPLY("SHDN", MAX9850_ENABLE, 7, 0, NULL, 0),
74SND_SOC_DAPM_MIXER_NAMED_CTL("Output Mixer", MAX9850_ENABLE, 2, 0,
75 &max9850_mixer_controls[0],
76 ARRAY_SIZE(max9850_mixer_controls)),
77SND_SOC_DAPM_PGA("Headphone Output", MAX9850_ENABLE, 3, 0, NULL, 0),
78SND_SOC_DAPM_DAC("DAC", "HiFi Playback", MAX9850_ENABLE, 0, 0),
79SND_SOC_DAPM_OUTPUT("OUTL"),
80SND_SOC_DAPM_OUTPUT("HPL"),
81SND_SOC_DAPM_OUTPUT("OUTR"),
82SND_SOC_DAPM_OUTPUT("HPR"),
83SND_SOC_DAPM_MIXER("Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),
84SND_SOC_DAPM_INPUT("INL"),
85SND_SOC_DAPM_INPUT("INR"),
86};
87
88static const struct snd_soc_dapm_route max9850_dapm_routes[] = {
89 /* output mixer */
90 {"Output Mixer", NULL, "DAC"},
91 {"Output Mixer", "Line In Switch", "Line Input"},
92
93 /* outputs */
94 {"Headphone Output", NULL, "Output Mixer"},
95 {"HPL", NULL, "Headphone Output"},
96 {"HPR", NULL, "Headphone Output"},
97 {"OUTL", NULL, "Output Mixer"},
98 {"OUTR", NULL, "Output Mixer"},
99
100 /* inputs */
101 {"Line Input", NULL, "INL"},
102 {"Line Input", NULL, "INR"},
103
104 /* supplies */
105 {"Output Mixer", NULL, "Charge Pump 1"},
106 {"Output Mixer", NULL, "Charge Pump 2"},
107 {"Output Mixer", NULL, "SHDN"},
108 {"DAC", NULL, "MCLK"},
109};
110
111static int max9850_hw_params(struct snd_pcm_substream *substream,
112 struct snd_pcm_hw_params *params,
113 struct snd_soc_dai *dai)
114{
115 struct snd_soc_component *component = dai->component;
116 struct max9850_priv *max9850 = snd_soc_component_get_drvdata(component);
117 u64 lrclk_div;
118 u8 sf, da;
119
120 if (!max9850->sysclk)
121 return -EINVAL;
122
123 /* lrclk_div = 2^22 * rate / iclk with iclk = mclk / sf */
124 sf = (snd_soc_component_read(component, MAX9850_CLOCK) >> 2) + 1;
125 lrclk_div = (1 << 22);
126 lrclk_div *= params_rate(params);
127 lrclk_div *= sf;
128 do_div(lrclk_div, max9850->sysclk);
129
130 snd_soc_component_write(component, MAX9850_LRCLK_MSB, (lrclk_div >> 8) & 0x7f);
131 snd_soc_component_write(component, MAX9850_LRCLK_LSB, lrclk_div & 0xff);
132
133 switch (params_width(params)) {
134 case 16:
135 da = 0;
136 break;
137 case 20:
138 da = 0x2;
139 break;
140 case 24:
141 da = 0x3;
142 break;
143 default:
144 return -EINVAL;
145 }
146 snd_soc_component_update_bits(component, MAX9850_DIGITAL_AUDIO, 0x3, da);
147
148 return 0;
149}
150
151static int max9850_set_dai_sysclk(struct snd_soc_dai *codec_dai,
152 int clk_id, unsigned int freq, int dir)
153{
154 struct snd_soc_component *component = codec_dai->component;
155 struct max9850_priv *max9850 = snd_soc_component_get_drvdata(component);
156
157 /* calculate mclk -> iclk divider */
158 if (freq <= 13000000)
159 snd_soc_component_write(component, MAX9850_CLOCK, 0x0);
160 else if (freq <= 26000000)
161 snd_soc_component_write(component, MAX9850_CLOCK, 0x4);
162 else if (freq <= 40000000)
163 snd_soc_component_write(component, MAX9850_CLOCK, 0x8);
164 else
165 return -EINVAL;
166
167 max9850->sysclk = freq;
168 return 0;
169}
170
171static int max9850_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
172{
173 struct snd_soc_component *component = codec_dai->component;
174 u8 da = 0;
175
176 /* set clock provider for audio interface */
177 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
178 case SND_SOC_DAIFMT_CBP_CFP:
179 da |= MAX9850_MASTER;
180 break;
181 case SND_SOC_DAIFMT_CBC_CFC:
182 break;
183 default:
184 return -EINVAL;
185 }
186
187 /* interface format */
188 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
189 case SND_SOC_DAIFMT_I2S:
190 da |= MAX9850_DLY;
191 break;
192 case SND_SOC_DAIFMT_RIGHT_J:
193 da |= MAX9850_RTJ;
194 break;
195 case SND_SOC_DAIFMT_LEFT_J:
196 break;
197 default:
198 return -EINVAL;
199 }
200
201 /* clock inversion */
202 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
203 case SND_SOC_DAIFMT_NB_NF:
204 break;
205 case SND_SOC_DAIFMT_IB_IF:
206 da |= MAX9850_BCINV | MAX9850_INV;
207 break;
208 case SND_SOC_DAIFMT_IB_NF:
209 da |= MAX9850_BCINV;
210 break;
211 case SND_SOC_DAIFMT_NB_IF:
212 da |= MAX9850_INV;
213 break;
214 default:
215 return -EINVAL;
216 }
217
218 /* set da */
219 snd_soc_component_write(component, MAX9850_DIGITAL_AUDIO, da);
220
221 return 0;
222}
223
224static int max9850_set_bias_level(struct snd_soc_component *component,
225 enum snd_soc_bias_level level)
226{
227 struct max9850_priv *max9850 = snd_soc_component_get_drvdata(component);
228 int ret;
229
230 switch (level) {
231 case SND_SOC_BIAS_ON:
232 break;
233 case SND_SOC_BIAS_PREPARE:
234 break;
235 case SND_SOC_BIAS_STANDBY:
236 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
237 ret = regcache_sync(max9850->regmap);
238 if (ret) {
239 dev_err(component->dev,
240 "Failed to sync cache: %d\n", ret);
241 return ret;
242 }
243 }
244 break;
245 case SND_SOC_BIAS_OFF:
246 break;
247 }
248 return 0;
249}
250
251#define MAX9850_RATES SNDRV_PCM_RATE_8000_48000
252
253#define MAX9850_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
254 SNDRV_PCM_FMTBIT_S24_LE)
255
256static const struct snd_soc_dai_ops max9850_dai_ops = {
257 .hw_params = max9850_hw_params,
258 .set_sysclk = max9850_set_dai_sysclk,
259 .set_fmt = max9850_set_dai_fmt,
260};
261
262static struct snd_soc_dai_driver max9850_dai = {
263 .name = "max9850-hifi",
264 .playback = {
265 .stream_name = "Playback",
266 .channels_min = 1,
267 .channels_max = 2,
268 .rates = MAX9850_RATES,
269 .formats = MAX9850_FORMATS
270 },
271 .ops = &max9850_dai_ops,
272};
273
274static int max9850_probe(struct snd_soc_component *component)
275{
276 /* enable zero-detect */
277 snd_soc_component_update_bits(component, MAX9850_GENERAL_PURPOSE, 1, 1);
278 /* enable slew-rate control */
279 snd_soc_component_update_bits(component, MAX9850_VOLUME, 0x40, 0x40);
280 /* set slew-rate 125ms */
281 snd_soc_component_update_bits(component, MAX9850_CHARGE_PUMP, 0xff, 0xc0);
282
283 return 0;
284}
285
286static const struct snd_soc_component_driver soc_component_dev_max9850 = {
287 .probe = max9850_probe,
288 .set_bias_level = max9850_set_bias_level,
289 .controls = max9850_controls,
290 .num_controls = ARRAY_SIZE(max9850_controls),
291 .dapm_widgets = max9850_dapm_widgets,
292 .num_dapm_widgets = ARRAY_SIZE(max9850_dapm_widgets),
293 .dapm_routes = max9850_dapm_routes,
294 .num_dapm_routes = ARRAY_SIZE(max9850_dapm_routes),
295 .suspend_bias_off = 1,
296 .idle_bias_on = 1,
297 .use_pmdown_time = 1,
298 .endianness = 1,
299};
300
301static int max9850_i2c_probe(struct i2c_client *i2c)
302{
303 struct max9850_priv *max9850;
304 int ret;
305
306 max9850 = devm_kzalloc(&i2c->dev, sizeof(struct max9850_priv),
307 GFP_KERNEL);
308 if (max9850 == NULL)
309 return -ENOMEM;
310
311 max9850->regmap = devm_regmap_init_i2c(i2c, &max9850_regmap);
312 if (IS_ERR(max9850->regmap))
313 return PTR_ERR(max9850->regmap);
314
315 i2c_set_clientdata(i2c, max9850);
316
317 ret = devm_snd_soc_register_component(&i2c->dev,
318 &soc_component_dev_max9850, &max9850_dai, 1);
319 return ret;
320}
321
322static const struct i2c_device_id max9850_i2c_id[] = {
323 { "max9850" },
324 { }
325};
326MODULE_DEVICE_TABLE(i2c, max9850_i2c_id);
327
328static struct i2c_driver max9850_i2c_driver = {
329 .driver = {
330 .name = "max9850",
331 },
332 .probe = max9850_i2c_probe,
333 .id_table = max9850_i2c_id,
334};
335
336module_i2c_driver(max9850_i2c_driver);
337
338MODULE_AUTHOR("Christian Glindkamp <christian.glindkamp@taskit.de>");
339MODULE_DESCRIPTION("ASoC MAX9850 codec driver");
340MODULE_LICENSE("GPL");
1/*
2 * max9850.c -- codec driver for max9850
3 *
4 * Copyright (C) 2011 taskit GmbH
5 *
6 * Author: Christian Glindkamp <christian.glindkamp@taskit.de>
7 *
8 * Initial development of this code was funded by
9 * MICRONIC Computer Systeme GmbH, http://www.mcsberlin.de/
10 *
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the
13 * Free Software Foundation; either version 2 of the License, or (at your
14 * option) any later version.
15 *
16 */
17
18#include <linux/module.h>
19#include <linux/init.h>
20#include <linux/i2c.h>
21#include <linux/regmap.h>
22#include <linux/slab.h>
23#include <sound/pcm.h>
24#include <sound/pcm_params.h>
25#include <sound/soc.h>
26#include <sound/tlv.h>
27
28#include "max9850.h"
29
30struct max9850_priv {
31 struct regmap *regmap;
32 unsigned int sysclk;
33};
34
35/* max9850 register cache */
36static const struct reg_default max9850_reg[] = {
37 { 2, 0x0c },
38 { 3, 0x00 },
39 { 4, 0x00 },
40 { 5, 0x00 },
41 { 6, 0x00 },
42 { 7, 0x00 },
43 { 8, 0x00 },
44 { 9, 0x00 },
45 { 10, 0x00 },
46};
47
48/* these registers are not used at the moment but provided for the sake of
49 * completeness */
50static bool max9850_volatile_register(struct device *dev, unsigned int reg)
51{
52 switch (reg) {
53 case MAX9850_STATUSA:
54 case MAX9850_STATUSB:
55 return 1;
56 default:
57 return 0;
58 }
59}
60
61static const struct regmap_config max9850_regmap = {
62 .reg_bits = 8,
63 .val_bits = 8,
64
65 .max_register = MAX9850_DIGITAL_AUDIO,
66 .volatile_reg = max9850_volatile_register,
67 .cache_type = REGCACHE_RBTREE,
68};
69
70static const DECLARE_TLV_DB_RANGE(max9850_tlv,
71 0x18, 0x1f, TLV_DB_SCALE_ITEM(-7450, 400, 0),
72 0x20, 0x33, TLV_DB_SCALE_ITEM(-4150, 200, 0),
73 0x34, 0x37, TLV_DB_SCALE_ITEM(-150, 100, 0),
74 0x38, 0x3f, TLV_DB_SCALE_ITEM(250, 50, 0)
75);
76
77static const struct snd_kcontrol_new max9850_controls[] = {
78SOC_SINGLE_TLV("Headphone Volume", MAX9850_VOLUME, 0, 0x3f, 1, max9850_tlv),
79SOC_SINGLE("Headphone Switch", MAX9850_VOLUME, 7, 1, 1),
80SOC_SINGLE("Mono Switch", MAX9850_GENERAL_PURPOSE, 2, 1, 0),
81};
82
83static const struct snd_kcontrol_new max9850_mixer_controls[] = {
84 SOC_DAPM_SINGLE("Line In Switch", MAX9850_ENABLE, 1, 1, 0),
85};
86
87static const struct snd_soc_dapm_widget max9850_dapm_widgets[] = {
88SND_SOC_DAPM_SUPPLY("Charge Pump 1", MAX9850_ENABLE, 4, 0, NULL, 0),
89SND_SOC_DAPM_SUPPLY("Charge Pump 2", MAX9850_ENABLE, 5, 0, NULL, 0),
90SND_SOC_DAPM_SUPPLY("MCLK", MAX9850_ENABLE, 6, 0, NULL, 0),
91SND_SOC_DAPM_SUPPLY("SHDN", MAX9850_ENABLE, 7, 0, NULL, 0),
92SND_SOC_DAPM_MIXER_NAMED_CTL("Output Mixer", MAX9850_ENABLE, 2, 0,
93 &max9850_mixer_controls[0],
94 ARRAY_SIZE(max9850_mixer_controls)),
95SND_SOC_DAPM_PGA("Headphone Output", MAX9850_ENABLE, 3, 0, NULL, 0),
96SND_SOC_DAPM_DAC("DAC", "HiFi Playback", MAX9850_ENABLE, 0, 0),
97SND_SOC_DAPM_OUTPUT("OUTL"),
98SND_SOC_DAPM_OUTPUT("HPL"),
99SND_SOC_DAPM_OUTPUT("OUTR"),
100SND_SOC_DAPM_OUTPUT("HPR"),
101SND_SOC_DAPM_MIXER("Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),
102SND_SOC_DAPM_INPUT("INL"),
103SND_SOC_DAPM_INPUT("INR"),
104};
105
106static const struct snd_soc_dapm_route max9850_dapm_routes[] = {
107 /* output mixer */
108 {"Output Mixer", NULL, "DAC"},
109 {"Output Mixer", "Line In Switch", "Line Input"},
110
111 /* outputs */
112 {"Headphone Output", NULL, "Output Mixer"},
113 {"HPL", NULL, "Headphone Output"},
114 {"HPR", NULL, "Headphone Output"},
115 {"OUTL", NULL, "Output Mixer"},
116 {"OUTR", NULL, "Output Mixer"},
117
118 /* inputs */
119 {"Line Input", NULL, "INL"},
120 {"Line Input", NULL, "INR"},
121
122 /* supplies */
123 {"Output Mixer", NULL, "Charge Pump 1"},
124 {"Output Mixer", NULL, "Charge Pump 2"},
125 {"Output Mixer", NULL, "SHDN"},
126 {"DAC", NULL, "MCLK"},
127};
128
129static int max9850_hw_params(struct snd_pcm_substream *substream,
130 struct snd_pcm_hw_params *params,
131 struct snd_soc_dai *dai)
132{
133 struct snd_soc_codec *codec = dai->codec;
134 struct max9850_priv *max9850 = snd_soc_codec_get_drvdata(codec);
135 u64 lrclk_div;
136 u8 sf, da;
137
138 if (!max9850->sysclk)
139 return -EINVAL;
140
141 /* lrclk_div = 2^22 * rate / iclk with iclk = mclk / sf */
142 sf = (snd_soc_read(codec, MAX9850_CLOCK) >> 2) + 1;
143 lrclk_div = (1 << 22);
144 lrclk_div *= params_rate(params);
145 lrclk_div *= sf;
146 do_div(lrclk_div, max9850->sysclk);
147
148 snd_soc_write(codec, MAX9850_LRCLK_MSB, (lrclk_div >> 8) & 0x7f);
149 snd_soc_write(codec, MAX9850_LRCLK_LSB, lrclk_div & 0xff);
150
151 switch (params_width(params)) {
152 case 16:
153 da = 0;
154 break;
155 case 20:
156 da = 0x2;
157 break;
158 case 24:
159 da = 0x3;
160 break;
161 default:
162 return -EINVAL;
163 }
164 snd_soc_update_bits(codec, MAX9850_DIGITAL_AUDIO, 0x3, da);
165
166 return 0;
167}
168
169static int max9850_set_dai_sysclk(struct snd_soc_dai *codec_dai,
170 int clk_id, unsigned int freq, int dir)
171{
172 struct snd_soc_codec *codec = codec_dai->codec;
173 struct max9850_priv *max9850 = snd_soc_codec_get_drvdata(codec);
174
175 /* calculate mclk -> iclk divider */
176 if (freq <= 13000000)
177 snd_soc_write(codec, MAX9850_CLOCK, 0x0);
178 else if (freq <= 26000000)
179 snd_soc_write(codec, MAX9850_CLOCK, 0x4);
180 else if (freq <= 40000000)
181 snd_soc_write(codec, MAX9850_CLOCK, 0x8);
182 else
183 return -EINVAL;
184
185 max9850->sysclk = freq;
186 return 0;
187}
188
189static int max9850_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
190{
191 struct snd_soc_codec *codec = codec_dai->codec;
192 u8 da = 0;
193
194 /* set master/slave audio interface */
195 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
196 case SND_SOC_DAIFMT_CBM_CFM:
197 da |= MAX9850_MASTER;
198 break;
199 case SND_SOC_DAIFMT_CBS_CFS:
200 break;
201 default:
202 return -EINVAL;
203 }
204
205 /* interface format */
206 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
207 case SND_SOC_DAIFMT_I2S:
208 da |= MAX9850_DLY;
209 break;
210 case SND_SOC_DAIFMT_RIGHT_J:
211 da |= MAX9850_RTJ;
212 break;
213 case SND_SOC_DAIFMT_LEFT_J:
214 break;
215 default:
216 return -EINVAL;
217 }
218
219 /* clock inversion */
220 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
221 case SND_SOC_DAIFMT_NB_NF:
222 break;
223 case SND_SOC_DAIFMT_IB_IF:
224 da |= MAX9850_BCINV | MAX9850_INV;
225 break;
226 case SND_SOC_DAIFMT_IB_NF:
227 da |= MAX9850_BCINV;
228 break;
229 case SND_SOC_DAIFMT_NB_IF:
230 da |= MAX9850_INV;
231 break;
232 default:
233 return -EINVAL;
234 }
235
236 /* set da */
237 snd_soc_write(codec, MAX9850_DIGITAL_AUDIO, da);
238
239 return 0;
240}
241
242static int max9850_set_bias_level(struct snd_soc_codec *codec,
243 enum snd_soc_bias_level level)
244{
245 struct max9850_priv *max9850 = snd_soc_codec_get_drvdata(codec);
246 int ret;
247
248 switch (level) {
249 case SND_SOC_BIAS_ON:
250 break;
251 case SND_SOC_BIAS_PREPARE:
252 break;
253 case SND_SOC_BIAS_STANDBY:
254 if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) {
255 ret = regcache_sync(max9850->regmap);
256 if (ret) {
257 dev_err(codec->dev,
258 "Failed to sync cache: %d\n", ret);
259 return ret;
260 }
261 }
262 break;
263 case SND_SOC_BIAS_OFF:
264 break;
265 }
266 return 0;
267}
268
269#define MAX9850_RATES SNDRV_PCM_RATE_8000_48000
270
271#define MAX9850_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
272 SNDRV_PCM_FMTBIT_S24_LE)
273
274static const struct snd_soc_dai_ops max9850_dai_ops = {
275 .hw_params = max9850_hw_params,
276 .set_sysclk = max9850_set_dai_sysclk,
277 .set_fmt = max9850_set_dai_fmt,
278};
279
280static struct snd_soc_dai_driver max9850_dai = {
281 .name = "max9850-hifi",
282 .playback = {
283 .stream_name = "Playback",
284 .channels_min = 1,
285 .channels_max = 2,
286 .rates = MAX9850_RATES,
287 .formats = MAX9850_FORMATS
288 },
289 .ops = &max9850_dai_ops,
290};
291
292static int max9850_probe(struct snd_soc_codec *codec)
293{
294 /* enable zero-detect */
295 snd_soc_update_bits(codec, MAX9850_GENERAL_PURPOSE, 1, 1);
296 /* enable slew-rate control */
297 snd_soc_update_bits(codec, MAX9850_VOLUME, 0x40, 0x40);
298 /* set slew-rate 125ms */
299 snd_soc_update_bits(codec, MAX9850_CHARGE_PUMP, 0xff, 0xc0);
300
301 return 0;
302}
303
304static struct snd_soc_codec_driver soc_codec_dev_max9850 = {
305 .probe = max9850_probe,
306 .set_bias_level = max9850_set_bias_level,
307 .suspend_bias_off = true,
308
309 .component_driver = {
310 .controls = max9850_controls,
311 .num_controls = ARRAY_SIZE(max9850_controls),
312 .dapm_widgets = max9850_dapm_widgets,
313 .num_dapm_widgets = ARRAY_SIZE(max9850_dapm_widgets),
314 .dapm_routes = max9850_dapm_routes,
315 .num_dapm_routes = ARRAY_SIZE(max9850_dapm_routes),
316 },
317};
318
319static int max9850_i2c_probe(struct i2c_client *i2c,
320 const struct i2c_device_id *id)
321{
322 struct max9850_priv *max9850;
323 int ret;
324
325 max9850 = devm_kzalloc(&i2c->dev, sizeof(struct max9850_priv),
326 GFP_KERNEL);
327 if (max9850 == NULL)
328 return -ENOMEM;
329
330 max9850->regmap = devm_regmap_init_i2c(i2c, &max9850_regmap);
331 if (IS_ERR(max9850->regmap))
332 return PTR_ERR(max9850->regmap);
333
334 i2c_set_clientdata(i2c, max9850);
335
336 ret = snd_soc_register_codec(&i2c->dev,
337 &soc_codec_dev_max9850, &max9850_dai, 1);
338 return ret;
339}
340
341static int max9850_i2c_remove(struct i2c_client *client)
342{
343 snd_soc_unregister_codec(&client->dev);
344 return 0;
345}
346
347static const struct i2c_device_id max9850_i2c_id[] = {
348 { "max9850", 0 },
349 { }
350};
351MODULE_DEVICE_TABLE(i2c, max9850_i2c_id);
352
353static struct i2c_driver max9850_i2c_driver = {
354 .driver = {
355 .name = "max9850",
356 },
357 .probe = max9850_i2c_probe,
358 .remove = max9850_i2c_remove,
359 .id_table = max9850_i2c_id,
360};
361
362module_i2c_driver(max9850_i2c_driver);
363
364MODULE_AUTHOR("Christian Glindkamp <christian.glindkamp@taskit.de>");
365MODULE_DESCRIPTION("ASoC MAX9850 codec driver");
366MODULE_LICENSE("GPL");