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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * AK4104 ALSA SoC (ASoC) driver
4 *
5 * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
6 */
7
8#include <linux/mod_devicetable.h>
9#include <linux/module.h>
10#include <linux/slab.h>
11#include <linux/spi/spi.h>
12#include <linux/gpio/consumer.h>
13#include <linux/regulator/consumer.h>
14#include <sound/asoundef.h>
15#include <sound/core.h>
16#include <sound/soc.h>
17#include <sound/initval.h>
18
19/* AK4104 registers addresses */
20#define AK4104_REG_CONTROL1 0x00
21#define AK4104_REG_RESERVED 0x01
22#define AK4104_REG_CONTROL2 0x02
23#define AK4104_REG_TX 0x03
24#define AK4104_REG_CHN_STATUS(x) ((x) + 0x04)
25#define AK4104_NUM_REGS 10
26
27#define AK4104_REG_MASK 0x1f
28#define AK4104_READ 0xc0
29#define AK4104_WRITE 0xe0
30#define AK4104_RESERVED_VAL 0x5b
31
32/* Bit masks for AK4104 registers */
33#define AK4104_CONTROL1_RSTN (1 << 0)
34#define AK4104_CONTROL1_PW (1 << 1)
35#define AK4104_CONTROL1_DIF0 (1 << 2)
36#define AK4104_CONTROL1_DIF1 (1 << 3)
37
38#define AK4104_CONTROL2_SEL0 (1 << 0)
39#define AK4104_CONTROL2_SEL1 (1 << 1)
40#define AK4104_CONTROL2_MODE (1 << 2)
41
42#define AK4104_TX_TXE (1 << 0)
43#define AK4104_TX_V (1 << 1)
44
45struct ak4104_private {
46 struct regmap *regmap;
47 struct regulator *regulator;
48};
49
50static const struct snd_soc_dapm_widget ak4104_dapm_widgets[] = {
51SND_SOC_DAPM_PGA("TXE", AK4104_REG_TX, AK4104_TX_TXE, 0, NULL, 0),
52
53SND_SOC_DAPM_OUTPUT("TX"),
54};
55
56static const struct snd_soc_dapm_route ak4104_dapm_routes[] = {
57 { "TXE", NULL, "Playback" },
58 { "TX", NULL, "TXE" },
59};
60
61static int ak4104_set_dai_fmt(struct snd_soc_dai *codec_dai,
62 unsigned int format)
63{
64 struct snd_soc_component *component = codec_dai->component;
65 struct ak4104_private *ak4104 = snd_soc_component_get_drvdata(component);
66 int val = 0;
67 int ret;
68
69 /* set DAI format */
70 switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
71 case SND_SOC_DAIFMT_RIGHT_J:
72 break;
73 case SND_SOC_DAIFMT_LEFT_J:
74 val |= AK4104_CONTROL1_DIF0;
75 break;
76 case SND_SOC_DAIFMT_I2S:
77 val |= AK4104_CONTROL1_DIF0 | AK4104_CONTROL1_DIF1;
78 break;
79 default:
80 dev_err(component->dev, "invalid dai format\n");
81 return -EINVAL;
82 }
83
84 /* This device can only be consumer */
85 if ((format & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) != SND_SOC_DAIFMT_CBC_CFC)
86 return -EINVAL;
87
88 ret = regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1,
89 AK4104_CONTROL1_DIF0 | AK4104_CONTROL1_DIF1,
90 val);
91 if (ret < 0)
92 return ret;
93
94 return 0;
95}
96
97static int ak4104_hw_params(struct snd_pcm_substream *substream,
98 struct snd_pcm_hw_params *params,
99 struct snd_soc_dai *dai)
100{
101 struct snd_soc_component *component = dai->component;
102 struct ak4104_private *ak4104 = snd_soc_component_get_drvdata(component);
103 int ret, val = 0;
104
105 /* set the IEC958 bits: consumer mode, no copyright bit */
106 val |= IEC958_AES0_CON_NOT_COPYRIGHT;
107 regmap_write(ak4104->regmap, AK4104_REG_CHN_STATUS(0), val);
108
109 val = 0;
110
111 switch (params_rate(params)) {
112 case 22050:
113 val |= IEC958_AES3_CON_FS_22050;
114 break;
115 case 24000:
116 val |= IEC958_AES3_CON_FS_24000;
117 break;
118 case 32000:
119 val |= IEC958_AES3_CON_FS_32000;
120 break;
121 case 44100:
122 val |= IEC958_AES3_CON_FS_44100;
123 break;
124 case 48000:
125 val |= IEC958_AES3_CON_FS_48000;
126 break;
127 case 88200:
128 val |= IEC958_AES3_CON_FS_88200;
129 break;
130 case 96000:
131 val |= IEC958_AES3_CON_FS_96000;
132 break;
133 case 176400:
134 val |= IEC958_AES3_CON_FS_176400;
135 break;
136 case 192000:
137 val |= IEC958_AES3_CON_FS_192000;
138 break;
139 default:
140 dev_err(component->dev, "unsupported sampling rate\n");
141 return -EINVAL;
142 }
143
144 ret = regmap_write(ak4104->regmap, AK4104_REG_CHN_STATUS(3), val);
145 if (ret < 0)
146 return ret;
147
148 return 0;
149}
150
151static const struct snd_soc_dai_ops ak4101_dai_ops = {
152 .hw_params = ak4104_hw_params,
153 .set_fmt = ak4104_set_dai_fmt,
154};
155
156static struct snd_soc_dai_driver ak4104_dai = {
157 .name = "ak4104-hifi",
158 .playback = {
159 .stream_name = "Playback",
160 .channels_min = 2,
161 .channels_max = 2,
162 .rates = SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 |
163 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
164 SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
165 SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000,
166 .formats = SNDRV_PCM_FMTBIT_S16_LE |
167 SNDRV_PCM_FMTBIT_S24_3LE |
168 SNDRV_PCM_FMTBIT_S24_LE
169 },
170 .ops = &ak4101_dai_ops,
171};
172
173static int ak4104_probe(struct snd_soc_component *component)
174{
175 struct ak4104_private *ak4104 = snd_soc_component_get_drvdata(component);
176 int ret;
177
178 ret = regulator_enable(ak4104->regulator);
179 if (ret < 0) {
180 dev_err(component->dev, "Unable to enable regulator: %d\n", ret);
181 return ret;
182 }
183
184 /* set power-up and non-reset bits */
185 ret = regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1,
186 AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN,
187 AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN);
188 if (ret < 0)
189 goto exit_disable_regulator;
190
191 /* enable transmitter */
192 ret = regmap_update_bits(ak4104->regmap, AK4104_REG_TX,
193 AK4104_TX_TXE, AK4104_TX_TXE);
194 if (ret < 0)
195 goto exit_disable_regulator;
196
197 return 0;
198
199exit_disable_regulator:
200 regulator_disable(ak4104->regulator);
201 return ret;
202}
203
204static void ak4104_remove(struct snd_soc_component *component)
205{
206 struct ak4104_private *ak4104 = snd_soc_component_get_drvdata(component);
207
208 regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1,
209 AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN, 0);
210 regulator_disable(ak4104->regulator);
211}
212
213#ifdef CONFIG_PM
214static int ak4104_soc_suspend(struct snd_soc_component *component)
215{
216 struct ak4104_private *priv = snd_soc_component_get_drvdata(component);
217
218 regulator_disable(priv->regulator);
219
220 return 0;
221}
222
223static int ak4104_soc_resume(struct snd_soc_component *component)
224{
225 struct ak4104_private *priv = snd_soc_component_get_drvdata(component);
226 int ret;
227
228 ret = regulator_enable(priv->regulator);
229 if (ret < 0)
230 return ret;
231
232 return 0;
233}
234#else
235#define ak4104_soc_suspend NULL
236#define ak4104_soc_resume NULL
237#endif /* CONFIG_PM */
238
239static const struct snd_soc_component_driver soc_component_device_ak4104 = {
240 .probe = ak4104_probe,
241 .remove = ak4104_remove,
242 .suspend = ak4104_soc_suspend,
243 .resume = ak4104_soc_resume,
244 .dapm_widgets = ak4104_dapm_widgets,
245 .num_dapm_widgets = ARRAY_SIZE(ak4104_dapm_widgets),
246 .dapm_routes = ak4104_dapm_routes,
247 .num_dapm_routes = ARRAY_SIZE(ak4104_dapm_routes),
248 .idle_bias_on = 1,
249 .use_pmdown_time = 1,
250 .endianness = 1,
251};
252
253static const struct regmap_config ak4104_regmap = {
254 .reg_bits = 8,
255 .val_bits = 8,
256
257 .max_register = AK4104_NUM_REGS - 1,
258 .read_flag_mask = AK4104_READ,
259 .write_flag_mask = AK4104_WRITE,
260
261 .cache_type = REGCACHE_RBTREE,
262};
263
264static int ak4104_spi_probe(struct spi_device *spi)
265{
266 struct ak4104_private *ak4104;
267 struct gpio_desc *reset_gpiod;
268 unsigned int val;
269 int ret;
270
271 spi->bits_per_word = 8;
272 spi->mode = SPI_MODE_0;
273 ret = spi_setup(spi);
274 if (ret < 0)
275 return ret;
276
277 ak4104 = devm_kzalloc(&spi->dev, sizeof(struct ak4104_private),
278 GFP_KERNEL);
279 if (ak4104 == NULL)
280 return -ENOMEM;
281
282 ak4104->regulator = devm_regulator_get(&spi->dev, "vdd");
283 if (IS_ERR(ak4104->regulator)) {
284 ret = PTR_ERR(ak4104->regulator);
285 dev_err(&spi->dev, "Unable to get Vdd regulator: %d\n", ret);
286 return ret;
287 }
288
289 ak4104->regmap = devm_regmap_init_spi(spi, &ak4104_regmap);
290 if (IS_ERR(ak4104->regmap)) {
291 ret = PTR_ERR(ak4104->regmap);
292 return ret;
293 }
294
295 reset_gpiod = devm_gpiod_get_optional(&spi->dev, "reset",
296 GPIOD_OUT_HIGH);
297 if (PTR_ERR(reset_gpiod) == -EPROBE_DEFER)
298 return -EPROBE_DEFER;
299
300 /* read the 'reserved' register - according to the datasheet, it
301 * should contain 0x5b. Not a good way to verify the presence of
302 * the device, but there is no hardware ID register. */
303 ret = regmap_read(ak4104->regmap, AK4104_REG_RESERVED, &val);
304 if (ret != 0)
305 return ret;
306 if (val != AK4104_RESERVED_VAL)
307 return -ENODEV;
308
309 spi_set_drvdata(spi, ak4104);
310
311 ret = devm_snd_soc_register_component(&spi->dev,
312 &soc_component_device_ak4104, &ak4104_dai, 1);
313 return ret;
314}
315
316static const struct of_device_id ak4104_of_match[] = {
317 { .compatible = "asahi-kasei,ak4104", },
318 { }
319};
320MODULE_DEVICE_TABLE(of, ak4104_of_match);
321
322static const struct spi_device_id ak4104_id_table[] = {
323 { "ak4104", 0 },
324 { }
325};
326MODULE_DEVICE_TABLE(spi, ak4104_id_table);
327
328static struct spi_driver ak4104_spi_driver = {
329 .driver = {
330 .name = "ak4104",
331 .of_match_table = ak4104_of_match,
332 },
333 .id_table = ak4104_id_table,
334 .probe = ak4104_spi_probe,
335};
336
337module_spi_driver(ak4104_spi_driver);
338
339MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
340MODULE_DESCRIPTION("Asahi Kasei AK4104 ALSA SoC driver");
341MODULE_LICENSE("GPL");
342
1/*
2 * AK4104 ALSA SoC (ASoC) driver
3 *
4 * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
10 */
11
12#include <linux/module.h>
13#include <linux/slab.h>
14#include <linux/spi/spi.h>
15#include <linux/of_device.h>
16#include <linux/of_gpio.h>
17#include <linux/regulator/consumer.h>
18#include <sound/asoundef.h>
19#include <sound/core.h>
20#include <sound/soc.h>
21#include <sound/initval.h>
22
23/* AK4104 registers addresses */
24#define AK4104_REG_CONTROL1 0x00
25#define AK4104_REG_RESERVED 0x01
26#define AK4104_REG_CONTROL2 0x02
27#define AK4104_REG_TX 0x03
28#define AK4104_REG_CHN_STATUS(x) ((x) + 0x04)
29#define AK4104_NUM_REGS 10
30
31#define AK4104_REG_MASK 0x1f
32#define AK4104_READ 0xc0
33#define AK4104_WRITE 0xe0
34#define AK4104_RESERVED_VAL 0x5b
35
36/* Bit masks for AK4104 registers */
37#define AK4104_CONTROL1_RSTN (1 << 0)
38#define AK4104_CONTROL1_PW (1 << 1)
39#define AK4104_CONTROL1_DIF0 (1 << 2)
40#define AK4104_CONTROL1_DIF1 (1 << 3)
41
42#define AK4104_CONTROL2_SEL0 (1 << 0)
43#define AK4104_CONTROL2_SEL1 (1 << 1)
44#define AK4104_CONTROL2_MODE (1 << 2)
45
46#define AK4104_TX_TXE (1 << 0)
47#define AK4104_TX_V (1 << 1)
48
49struct ak4104_private {
50 struct regmap *regmap;
51 struct regulator *regulator;
52};
53
54static const struct snd_soc_dapm_widget ak4104_dapm_widgets[] = {
55SND_SOC_DAPM_PGA("TXE", AK4104_REG_TX, AK4104_TX_TXE, 0, NULL, 0),
56
57SND_SOC_DAPM_OUTPUT("TX"),
58};
59
60static const struct snd_soc_dapm_route ak4104_dapm_routes[] = {
61 { "TXE", NULL, "Playback" },
62 { "TX", NULL, "TXE" },
63};
64
65static int ak4104_set_dai_fmt(struct snd_soc_dai *codec_dai,
66 unsigned int format)
67{
68 struct snd_soc_component *component = codec_dai->component;
69 struct ak4104_private *ak4104 = snd_soc_component_get_drvdata(component);
70 int val = 0;
71 int ret;
72
73 /* set DAI format */
74 switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
75 case SND_SOC_DAIFMT_RIGHT_J:
76 break;
77 case SND_SOC_DAIFMT_LEFT_J:
78 val |= AK4104_CONTROL1_DIF0;
79 break;
80 case SND_SOC_DAIFMT_I2S:
81 val |= AK4104_CONTROL1_DIF0 | AK4104_CONTROL1_DIF1;
82 break;
83 default:
84 dev_err(component->dev, "invalid dai format\n");
85 return -EINVAL;
86 }
87
88 /* This device can only be slave */
89 if ((format & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS)
90 return -EINVAL;
91
92 ret = regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1,
93 AK4104_CONTROL1_DIF0 | AK4104_CONTROL1_DIF1,
94 val);
95 if (ret < 0)
96 return ret;
97
98 return 0;
99}
100
101static int ak4104_hw_params(struct snd_pcm_substream *substream,
102 struct snd_pcm_hw_params *params,
103 struct snd_soc_dai *dai)
104{
105 struct snd_soc_component *component = dai->component;
106 struct ak4104_private *ak4104 = snd_soc_component_get_drvdata(component);
107 int ret, val = 0;
108
109 /* set the IEC958 bits: consumer mode, no copyright bit */
110 val |= IEC958_AES0_CON_NOT_COPYRIGHT;
111 regmap_write(ak4104->regmap, AK4104_REG_CHN_STATUS(0), val);
112
113 val = 0;
114
115 switch (params_rate(params)) {
116 case 22050:
117 val |= IEC958_AES3_CON_FS_22050;
118 break;
119 case 24000:
120 val |= IEC958_AES3_CON_FS_24000;
121 break;
122 case 32000:
123 val |= IEC958_AES3_CON_FS_32000;
124 break;
125 case 44100:
126 val |= IEC958_AES3_CON_FS_44100;
127 break;
128 case 48000:
129 val |= IEC958_AES3_CON_FS_48000;
130 break;
131 case 88200:
132 val |= IEC958_AES3_CON_FS_88200;
133 break;
134 case 96000:
135 val |= IEC958_AES3_CON_FS_96000;
136 break;
137 case 176400:
138 val |= IEC958_AES3_CON_FS_176400;
139 break;
140 case 192000:
141 val |= IEC958_AES3_CON_FS_192000;
142 break;
143 default:
144 dev_err(component->dev, "unsupported sampling rate\n");
145 return -EINVAL;
146 }
147
148 ret = regmap_write(ak4104->regmap, AK4104_REG_CHN_STATUS(3), val);
149 if (ret < 0)
150 return ret;
151
152 return 0;
153}
154
155static const struct snd_soc_dai_ops ak4101_dai_ops = {
156 .hw_params = ak4104_hw_params,
157 .set_fmt = ak4104_set_dai_fmt,
158};
159
160static struct snd_soc_dai_driver ak4104_dai = {
161 .name = "ak4104-hifi",
162 .playback = {
163 .stream_name = "Playback",
164 .channels_min = 2,
165 .channels_max = 2,
166 .rates = SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 |
167 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
168 SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
169 SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000,
170 .formats = SNDRV_PCM_FMTBIT_S16_LE |
171 SNDRV_PCM_FMTBIT_S24_3LE |
172 SNDRV_PCM_FMTBIT_S24_LE
173 },
174 .ops = &ak4101_dai_ops,
175};
176
177static int ak4104_probe(struct snd_soc_component *component)
178{
179 struct ak4104_private *ak4104 = snd_soc_component_get_drvdata(component);
180 int ret;
181
182 ret = regulator_enable(ak4104->regulator);
183 if (ret < 0) {
184 dev_err(component->dev, "Unable to enable regulator: %d\n", ret);
185 return ret;
186 }
187
188 /* set power-up and non-reset bits */
189 ret = regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1,
190 AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN,
191 AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN);
192 if (ret < 0)
193 goto exit_disable_regulator;
194
195 /* enable transmitter */
196 ret = regmap_update_bits(ak4104->regmap, AK4104_REG_TX,
197 AK4104_TX_TXE, AK4104_TX_TXE);
198 if (ret < 0)
199 goto exit_disable_regulator;
200
201 return 0;
202
203exit_disable_regulator:
204 regulator_disable(ak4104->regulator);
205 return ret;
206}
207
208static void ak4104_remove(struct snd_soc_component *component)
209{
210 struct ak4104_private *ak4104 = snd_soc_component_get_drvdata(component);
211
212 regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1,
213 AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN, 0);
214 regulator_disable(ak4104->regulator);
215}
216
217#ifdef CONFIG_PM
218static int ak4104_soc_suspend(struct snd_soc_component *component)
219{
220 struct ak4104_private *priv = snd_soc_component_get_drvdata(component);
221
222 regulator_disable(priv->regulator);
223
224 return 0;
225}
226
227static int ak4104_soc_resume(struct snd_soc_component *component)
228{
229 struct ak4104_private *priv = snd_soc_component_get_drvdata(component);
230 int ret;
231
232 ret = regulator_enable(priv->regulator);
233 if (ret < 0)
234 return ret;
235
236 return 0;
237}
238#else
239#define ak4104_soc_suspend NULL
240#define ak4104_soc_resume NULL
241#endif /* CONFIG_PM */
242
243static const struct snd_soc_component_driver soc_component_device_ak4104 = {
244 .probe = ak4104_probe,
245 .remove = ak4104_remove,
246 .suspend = ak4104_soc_suspend,
247 .resume = ak4104_soc_resume,
248 .dapm_widgets = ak4104_dapm_widgets,
249 .num_dapm_widgets = ARRAY_SIZE(ak4104_dapm_widgets),
250 .dapm_routes = ak4104_dapm_routes,
251 .num_dapm_routes = ARRAY_SIZE(ak4104_dapm_routes),
252 .idle_bias_on = 1,
253 .use_pmdown_time = 1,
254 .endianness = 1,
255 .non_legacy_dai_naming = 1,
256};
257
258static const struct regmap_config ak4104_regmap = {
259 .reg_bits = 8,
260 .val_bits = 8,
261
262 .max_register = AK4104_NUM_REGS - 1,
263 .read_flag_mask = AK4104_READ,
264 .write_flag_mask = AK4104_WRITE,
265
266 .cache_type = REGCACHE_RBTREE,
267};
268
269static int ak4104_spi_probe(struct spi_device *spi)
270{
271 struct device_node *np = spi->dev.of_node;
272 struct ak4104_private *ak4104;
273 unsigned int val;
274 int ret;
275
276 spi->bits_per_word = 8;
277 spi->mode = SPI_MODE_0;
278 ret = spi_setup(spi);
279 if (ret < 0)
280 return ret;
281
282 ak4104 = devm_kzalloc(&spi->dev, sizeof(struct ak4104_private),
283 GFP_KERNEL);
284 if (ak4104 == NULL)
285 return -ENOMEM;
286
287 ak4104->regulator = devm_regulator_get(&spi->dev, "vdd");
288 if (IS_ERR(ak4104->regulator)) {
289 ret = PTR_ERR(ak4104->regulator);
290 dev_err(&spi->dev, "Unable to get Vdd regulator: %d\n", ret);
291 return ret;
292 }
293
294 ak4104->regmap = devm_regmap_init_spi(spi, &ak4104_regmap);
295 if (IS_ERR(ak4104->regmap)) {
296 ret = PTR_ERR(ak4104->regmap);
297 return ret;
298 }
299
300 if (np) {
301 enum of_gpio_flags flags;
302 int gpio = of_get_named_gpio_flags(np, "reset-gpio", 0, &flags);
303
304 if (gpio_is_valid(gpio)) {
305 ret = devm_gpio_request_one(&spi->dev, gpio,
306 flags & OF_GPIO_ACTIVE_LOW ?
307 GPIOF_OUT_INIT_LOW : GPIOF_OUT_INIT_HIGH,
308 "ak4104 reset");
309 if (ret < 0)
310 return ret;
311 }
312 }
313
314 /* read the 'reserved' register - according to the datasheet, it
315 * should contain 0x5b. Not a good way to verify the presence of
316 * the device, but there is no hardware ID register. */
317 ret = regmap_read(ak4104->regmap, AK4104_REG_RESERVED, &val);
318 if (ret != 0)
319 return ret;
320 if (val != AK4104_RESERVED_VAL)
321 return -ENODEV;
322
323 spi_set_drvdata(spi, ak4104);
324
325 ret = devm_snd_soc_register_component(&spi->dev,
326 &soc_component_device_ak4104, &ak4104_dai, 1);
327 return ret;
328}
329
330static const struct of_device_id ak4104_of_match[] = {
331 { .compatible = "asahi-kasei,ak4104", },
332 { }
333};
334MODULE_DEVICE_TABLE(of, ak4104_of_match);
335
336static const struct spi_device_id ak4104_id_table[] = {
337 { "ak4104", 0 },
338 { }
339};
340MODULE_DEVICE_TABLE(spi, ak4104_id_table);
341
342static struct spi_driver ak4104_spi_driver = {
343 .driver = {
344 .name = "ak4104",
345 .of_match_table = ak4104_of_match,
346 },
347 .id_table = ak4104_id_table,
348 .probe = ak4104_spi_probe,
349};
350
351module_spi_driver(ak4104_spi_driver);
352
353MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
354MODULE_DESCRIPTION("Asahi Kasei AK4104 ALSA SoC driver");
355MODULE_LICENSE("GPL");
356