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-rw-r--r--sound/soc/codecs/ak4613.c700
1 files changed, 700 insertions, 0 deletions
diff --git a/sound/soc/codecs/ak4613.c b/sound/soc/codecs/ak4613.c
new file mode 100644
index 000000000..c1181a207
--- /dev/null
+++ b/sound/soc/codecs/ak4613.c
@@ -0,0 +1,700 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// ak4613.c -- Asahi Kasei ALSA Soc Audio driver
+//
+// Copyright (C) 2015 Renesas Electronics Corporation
+// Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+//
+// Based on ak4642.c by Kuninori Morimoto
+// Based on wm8731.c by Richard Purdie
+// Based on ak4535.c by Richard Purdie
+// Based on wm8753.c by Liam Girdwood
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/of_device.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <sound/soc.h>
+#include <sound/pcm_params.h>
+#include <sound/tlv.h>
+
+#define PW_MGMT1 0x00 /* Power Management 1 */
+#define PW_MGMT2 0x01 /* Power Management 2 */
+#define PW_MGMT3 0x02 /* Power Management 3 */
+#define CTRL1 0x03 /* Control 1 */
+#define CTRL2 0x04 /* Control 2 */
+#define DEMP1 0x05 /* De-emphasis1 */
+#define DEMP2 0x06 /* De-emphasis2 */
+#define OFD 0x07 /* Overflow Detect */
+#define ZRD 0x08 /* Zero Detect */
+#define ICTRL 0x09 /* Input Control */
+#define OCTRL 0x0a /* Output Control */
+#define LOUT1 0x0b /* LOUT1 Volume Control */
+#define ROUT1 0x0c /* ROUT1 Volume Control */
+#define LOUT2 0x0d /* LOUT2 Volume Control */
+#define ROUT2 0x0e /* ROUT2 Volume Control */
+#define LOUT3 0x0f /* LOUT3 Volume Control */
+#define ROUT3 0x10 /* ROUT3 Volume Control */
+#define LOUT4 0x11 /* LOUT4 Volume Control */
+#define ROUT4 0x12 /* ROUT4 Volume Control */
+#define LOUT5 0x13 /* LOUT5 Volume Control */
+#define ROUT5 0x14 /* ROUT5 Volume Control */
+#define LOUT6 0x15 /* LOUT6 Volume Control */
+#define ROUT6 0x16 /* ROUT6 Volume Control */
+
+/* PW_MGMT1 */
+#define RSTN BIT(0)
+#define PMDAC BIT(1)
+#define PMADC BIT(2)
+#define PMVR BIT(3)
+
+/* PW_MGMT2 */
+#define PMAD_ALL 0x7
+
+/* PW_MGMT3 */
+#define PMDA_ALL 0x3f
+
+/* CTRL1 */
+#define DIF0 BIT(3)
+#define DIF1 BIT(4)
+#define DIF2 BIT(5)
+#define TDM0 BIT(6)
+#define TDM1 BIT(7)
+#define NO_FMT (0xff)
+#define FMT_MASK (0xf8)
+
+/* CTRL2 */
+#define DFS_MASK (3 << 2)
+#define DFS_NORMAL_SPEED (0 << 2)
+#define DFS_DOUBLE_SPEED (1 << 2)
+#define DFS_QUAD_SPEED (2 << 2)
+
+/* ICTRL */
+#define ICTRL_MASK (0x3)
+
+/* OCTRL */
+#define OCTRL_MASK (0x3F)
+
+struct ak4613_formats {
+ unsigned int width;
+ unsigned int fmt;
+};
+
+struct ak4613_interface {
+ struct ak4613_formats capture;
+ struct ak4613_formats playback;
+};
+
+struct ak4613_priv {
+ struct mutex lock;
+ const struct ak4613_interface *iface;
+ struct snd_pcm_hw_constraint_list constraint;
+ struct work_struct dummy_write_work;
+ struct snd_soc_component *component;
+ unsigned int rate;
+ unsigned int sysclk;
+
+ unsigned int fmt;
+ u8 oc;
+ u8 ic;
+ int cnt;
+};
+
+/*
+ * Playback Volume
+ *
+ * max : 0x00 : 0 dB
+ * ( 0.5 dB step )
+ * min : 0xFE : -127.0 dB
+ * mute: 0xFF
+ */
+static const DECLARE_TLV_DB_SCALE(out_tlv, -12750, 50, 1);
+
+static const struct snd_kcontrol_new ak4613_snd_controls[] = {
+ SOC_DOUBLE_R_TLV("Digital Playback Volume1", LOUT1, ROUT1,
+ 0, 0xFF, 1, out_tlv),
+ SOC_DOUBLE_R_TLV("Digital Playback Volume2", LOUT2, ROUT2,
+ 0, 0xFF, 1, out_tlv),
+ SOC_DOUBLE_R_TLV("Digital Playback Volume3", LOUT3, ROUT3,
+ 0, 0xFF, 1, out_tlv),
+ SOC_DOUBLE_R_TLV("Digital Playback Volume4", LOUT4, ROUT4,
+ 0, 0xFF, 1, out_tlv),
+ SOC_DOUBLE_R_TLV("Digital Playback Volume5", LOUT5, ROUT5,
+ 0, 0xFF, 1, out_tlv),
+ SOC_DOUBLE_R_TLV("Digital Playback Volume6", LOUT6, ROUT6,
+ 0, 0xFF, 1, out_tlv),
+};
+
+static const struct reg_default ak4613_reg[] = {
+ { 0x0, 0x0f }, { 0x1, 0x07 }, { 0x2, 0x3f }, { 0x3, 0x20 },
+ { 0x4, 0x20 }, { 0x5, 0x55 }, { 0x6, 0x05 }, { 0x7, 0x07 },
+ { 0x8, 0x0f }, { 0x9, 0x07 }, { 0xa, 0x3f }, { 0xb, 0x00 },
+ { 0xc, 0x00 }, { 0xd, 0x00 }, { 0xe, 0x00 }, { 0xf, 0x00 },
+ { 0x10, 0x00 }, { 0x11, 0x00 }, { 0x12, 0x00 }, { 0x13, 0x00 },
+ { 0x14, 0x00 }, { 0x15, 0x00 }, { 0x16, 0x00 },
+};
+
+#define AUDIO_IFACE_TO_VAL(fmts) ((fmts - ak4613_iface) << 3)
+#define AUDIO_IFACE(b, fmt) { b, SND_SOC_DAIFMT_##fmt }
+static const struct ak4613_interface ak4613_iface[] = {
+ /* capture */ /* playback */
+ /* [0] - [2] are not supported */
+ [3] = { AUDIO_IFACE(24, LEFT_J), AUDIO_IFACE(24, LEFT_J) },
+ [4] = { AUDIO_IFACE(24, I2S), AUDIO_IFACE(24, I2S) },
+};
+
+static const struct regmap_config ak4613_regmap_cfg = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = 0x16,
+ .reg_defaults = ak4613_reg,
+ .num_reg_defaults = ARRAY_SIZE(ak4613_reg),
+ .cache_type = REGCACHE_RBTREE,
+};
+
+static const struct of_device_id ak4613_of_match[] = {
+ { .compatible = "asahi-kasei,ak4613", .data = &ak4613_regmap_cfg },
+ {},
+};
+MODULE_DEVICE_TABLE(of, ak4613_of_match);
+
+static const struct i2c_device_id ak4613_i2c_id[] = {
+ { "ak4613", (kernel_ulong_t)&ak4613_regmap_cfg },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, ak4613_i2c_id);
+
+static const struct snd_soc_dapm_widget ak4613_dapm_widgets[] = {
+
+ /* Outputs */
+ SND_SOC_DAPM_OUTPUT("LOUT1"),
+ SND_SOC_DAPM_OUTPUT("LOUT2"),
+ SND_SOC_DAPM_OUTPUT("LOUT3"),
+ SND_SOC_DAPM_OUTPUT("LOUT4"),
+ SND_SOC_DAPM_OUTPUT("LOUT5"),
+ SND_SOC_DAPM_OUTPUT("LOUT6"),
+
+ SND_SOC_DAPM_OUTPUT("ROUT1"),
+ SND_SOC_DAPM_OUTPUT("ROUT2"),
+ SND_SOC_DAPM_OUTPUT("ROUT3"),
+ SND_SOC_DAPM_OUTPUT("ROUT4"),
+ SND_SOC_DAPM_OUTPUT("ROUT5"),
+ SND_SOC_DAPM_OUTPUT("ROUT6"),
+
+ /* Inputs */
+ SND_SOC_DAPM_INPUT("LIN1"),
+ SND_SOC_DAPM_INPUT("LIN2"),
+
+ SND_SOC_DAPM_INPUT("RIN1"),
+ SND_SOC_DAPM_INPUT("RIN2"),
+
+ /* DAC */
+ SND_SOC_DAPM_DAC("DAC1", NULL, PW_MGMT3, 0, 0),
+ SND_SOC_DAPM_DAC("DAC2", NULL, PW_MGMT3, 1, 0),
+ SND_SOC_DAPM_DAC("DAC3", NULL, PW_MGMT3, 2, 0),
+ SND_SOC_DAPM_DAC("DAC4", NULL, PW_MGMT3, 3, 0),
+ SND_SOC_DAPM_DAC("DAC5", NULL, PW_MGMT3, 4, 0),
+ SND_SOC_DAPM_DAC("DAC6", NULL, PW_MGMT3, 5, 0),
+
+ /* ADC */
+ SND_SOC_DAPM_ADC("ADC1", NULL, PW_MGMT2, 0, 0),
+ SND_SOC_DAPM_ADC("ADC2", NULL, PW_MGMT2, 1, 0),
+};
+
+static const struct snd_soc_dapm_route ak4613_intercon[] = {
+ {"LOUT1", NULL, "DAC1"},
+ {"LOUT2", NULL, "DAC2"},
+ {"LOUT3", NULL, "DAC3"},
+ {"LOUT4", NULL, "DAC4"},
+ {"LOUT5", NULL, "DAC5"},
+ {"LOUT6", NULL, "DAC6"},
+
+ {"ROUT1", NULL, "DAC1"},
+ {"ROUT2", NULL, "DAC2"},
+ {"ROUT3", NULL, "DAC3"},
+ {"ROUT4", NULL, "DAC4"},
+ {"ROUT5", NULL, "DAC5"},
+ {"ROUT6", NULL, "DAC6"},
+
+ {"DAC1", NULL, "Playback"},
+ {"DAC2", NULL, "Playback"},
+ {"DAC3", NULL, "Playback"},
+ {"DAC4", NULL, "Playback"},
+ {"DAC5", NULL, "Playback"},
+ {"DAC6", NULL, "Playback"},
+
+ {"Capture", NULL, "ADC1"},
+ {"Capture", NULL, "ADC2"},
+
+ {"ADC1", NULL, "LIN1"},
+ {"ADC2", NULL, "LIN2"},
+
+ {"ADC1", NULL, "RIN1"},
+ {"ADC2", NULL, "RIN2"},
+};
+
+static void ak4613_dai_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_component *component = dai->component;
+ struct ak4613_priv *priv = snd_soc_component_get_drvdata(component);
+ struct device *dev = component->dev;
+
+ mutex_lock(&priv->lock);
+ priv->cnt--;
+ if (priv->cnt < 0) {
+ dev_err(dev, "unexpected counter error\n");
+ priv->cnt = 0;
+ }
+ if (!priv->cnt)
+ priv->iface = NULL;
+ mutex_unlock(&priv->lock);
+}
+
+static void ak4613_hw_constraints(struct ak4613_priv *priv,
+ struct snd_pcm_runtime *runtime)
+{
+ static const unsigned int ak4613_rates[] = {
+ 32000,
+ 44100,
+ 48000,
+ 64000,
+ 88200,
+ 96000,
+ 176400,
+ 192000,
+ };
+ struct snd_pcm_hw_constraint_list *constraint = &priv->constraint;
+ unsigned int fs;
+ int i;
+
+ constraint->list = ak4613_rates;
+ constraint->mask = 0;
+ constraint->count = 0;
+
+ /*
+ * Slave Mode
+ * Normal: [32kHz, 48kHz] : 256fs,384fs or 512fs
+ * Double: [64kHz, 96kHz] : 256fs
+ * Quad : [128kHz,192kHz]: 128fs
+ *
+ * Master mode
+ * Normal: [32kHz, 48kHz] : 256fs or 512fs
+ * Double: [64kHz, 96kHz] : 256fs
+ * Quad : [128kHz,192kHz]: 128fs
+ */
+ for (i = 0; i < ARRAY_SIZE(ak4613_rates); i++) {
+ /* minimum fs on each range */
+ fs = (ak4613_rates[i] <= 96000) ? 256 : 128;
+
+ if (priv->sysclk >= ak4613_rates[i] * fs)
+ constraint->count = i + 1;
+ }
+
+ snd_pcm_hw_constraint_list(runtime, 0,
+ SNDRV_PCM_HW_PARAM_RATE, constraint);
+}
+
+static int ak4613_dai_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_component *component = dai->component;
+ struct ak4613_priv *priv = snd_soc_component_get_drvdata(component);
+
+ priv->cnt++;
+
+ ak4613_hw_constraints(priv, substream->runtime);
+
+ return 0;
+}
+
+static int ak4613_dai_set_sysclk(struct snd_soc_dai *codec_dai,
+ int clk_id, unsigned int freq, int dir)
+{
+ struct snd_soc_component *component = codec_dai->component;
+ struct ak4613_priv *priv = snd_soc_component_get_drvdata(component);
+
+ priv->sysclk = freq;
+
+ return 0;
+}
+
+static int ak4613_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+ struct snd_soc_component *component = dai->component;
+ struct ak4613_priv *priv = snd_soc_component_get_drvdata(component);
+
+ fmt &= SND_SOC_DAIFMT_FORMAT_MASK;
+
+ switch (fmt) {
+ case SND_SOC_DAIFMT_LEFT_J:
+ case SND_SOC_DAIFMT_I2S:
+ priv->fmt = fmt;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static bool ak4613_dai_fmt_matching(const struct ak4613_interface *iface,
+ int is_play,
+ unsigned int fmt, unsigned int width)
+{
+ const struct ak4613_formats *fmts;
+
+ fmts = (is_play) ? &iface->playback : &iface->capture;
+
+ if (fmts->fmt != fmt)
+ return false;
+
+ if (fmts->width != width)
+ return false;
+
+ return true;
+}
+
+static int ak4613_dai_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_component *component = dai->component;
+ struct ak4613_priv *priv = snd_soc_component_get_drvdata(component);
+ const struct ak4613_interface *iface;
+ struct device *dev = component->dev;
+ unsigned int width = params_width(params);
+ unsigned int fmt = priv->fmt;
+ unsigned int rate;
+ int is_play = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
+ int i, ret;
+ u8 fmt_ctrl, ctrl2;
+
+ rate = params_rate(params);
+ switch (rate) {
+ case 32000:
+ case 44100:
+ case 48000:
+ ctrl2 = DFS_NORMAL_SPEED;
+ break;
+ case 64000:
+ case 88200:
+ case 96000:
+ ctrl2 = DFS_DOUBLE_SPEED;
+ break;
+ case 176400:
+ case 192000:
+ ctrl2 = DFS_QUAD_SPEED;
+ break;
+ default:
+ return -EINVAL;
+ }
+ priv->rate = rate;
+
+ /*
+ * FIXME
+ *
+ * It doesn't support TDM at this point
+ */
+ fmt_ctrl = NO_FMT;
+ ret = -EINVAL;
+ iface = NULL;
+
+ mutex_lock(&priv->lock);
+ if (priv->iface) {
+ if (ak4613_dai_fmt_matching(priv->iface, is_play, fmt, width))
+ iface = priv->iface;
+ } else {
+ for (i = ARRAY_SIZE(ak4613_iface) - 1; i >= 0; i--) {
+ if (!ak4613_dai_fmt_matching(ak4613_iface + i,
+ is_play,
+ fmt, width))
+ continue;
+ iface = ak4613_iface + i;
+ break;
+ }
+ }
+
+ if ((priv->iface == NULL) ||
+ (priv->iface == iface)) {
+ priv->iface = iface;
+ ret = 0;
+ }
+ mutex_unlock(&priv->lock);
+
+ if (ret < 0)
+ goto hw_params_end;
+
+ fmt_ctrl = AUDIO_IFACE_TO_VAL(iface);
+
+ snd_soc_component_update_bits(component, CTRL1, FMT_MASK, fmt_ctrl);
+ snd_soc_component_update_bits(component, CTRL2, DFS_MASK, ctrl2);
+
+ snd_soc_component_update_bits(component, ICTRL, ICTRL_MASK, priv->ic);
+ snd_soc_component_update_bits(component, OCTRL, OCTRL_MASK, priv->oc);
+
+hw_params_end:
+ if (ret < 0)
+ dev_warn(dev, "unsupported data width/format combination\n");
+
+ return ret;
+}
+
+static int ak4613_set_bias_level(struct snd_soc_component *component,
+ enum snd_soc_bias_level level)
+{
+ u8 mgmt1 = 0;
+
+ switch (level) {
+ case SND_SOC_BIAS_ON:
+ mgmt1 |= RSTN;
+ /* fall through */
+ case SND_SOC_BIAS_PREPARE:
+ mgmt1 |= PMADC | PMDAC;
+ /* fall through */
+ case SND_SOC_BIAS_STANDBY:
+ mgmt1 |= PMVR;
+ /* fall through */
+ case SND_SOC_BIAS_OFF:
+ default:
+ break;
+ }
+
+ snd_soc_component_write(component, PW_MGMT1, mgmt1);
+
+ return 0;
+}
+
+static void ak4613_dummy_write(struct work_struct *work)
+{
+ struct ak4613_priv *priv = container_of(work,
+ struct ak4613_priv,
+ dummy_write_work);
+ struct snd_soc_component *component = priv->component;
+ unsigned int mgmt1;
+ unsigned int mgmt3;
+
+ /*
+ * PW_MGMT1 / PW_MGMT3 needs dummy write at least after 5 LR clocks
+ *
+ * Note
+ *
+ * To avoid extra delay, we want to avoid preemption here,
+ * but we can't. Because it uses I2C access which is using IRQ
+ * and sleep. Thus, delay might be more than 5 LR clocks
+ * see also
+ * ak4613_dai_trigger()
+ */
+ udelay(5000000 / priv->rate);
+
+ snd_soc_component_read(component, PW_MGMT1, &mgmt1);
+ snd_soc_component_read(component, PW_MGMT3, &mgmt3);
+
+ snd_soc_component_write(component, PW_MGMT1, mgmt1);
+ snd_soc_component_write(component, PW_MGMT3, mgmt3);
+}
+
+static int ak4613_dai_trigger(struct snd_pcm_substream *substream, int cmd,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_component *component = dai->component;
+ struct ak4613_priv *priv = snd_soc_component_get_drvdata(component);
+
+ /*
+ * FIXME
+ *
+ * PW_MGMT1 / PW_MGMT3 needs dummy write at least after 5 LR clocks
+ * from Power Down Release. Otherwise, Playback volume will be 0dB.
+ * To avoid complex multiple delay/dummy_write method from
+ * ak4613_set_bias_level() / SND_SOC_DAPM_DAC_E("DACx", ...),
+ * call it once here.
+ *
+ * But, unfortunately, we can't "write" here because here is atomic
+ * context (It uses I2C access for writing).
+ * Thus, use schedule_work() to switching to normal context
+ * immediately.
+ *
+ * Note
+ *
+ * Calling ak4613_dummy_write() function might be delayed.
+ * In such case, ak4613 volume might be temporarily 0dB when
+ * beggining of playback.
+ * see also
+ * ak4613_dummy_write()
+ */
+
+ if ((cmd != SNDRV_PCM_TRIGGER_START) &&
+ (cmd != SNDRV_PCM_TRIGGER_RESUME))
+ return 0;
+
+ if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
+ return 0;
+
+ priv->component = component;
+ schedule_work(&priv->dummy_write_work);
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops ak4613_dai_ops = {
+ .startup = ak4613_dai_startup,
+ .shutdown = ak4613_dai_shutdown,
+ .set_sysclk = ak4613_dai_set_sysclk,
+ .set_fmt = ak4613_dai_set_fmt,
+ .trigger = ak4613_dai_trigger,
+ .hw_params = ak4613_dai_hw_params,
+};
+
+#define AK4613_PCM_RATE (SNDRV_PCM_RATE_32000 |\
+ SNDRV_PCM_RATE_44100 |\
+ SNDRV_PCM_RATE_48000 |\
+ SNDRV_PCM_RATE_64000 |\
+ SNDRV_PCM_RATE_88200 |\
+ SNDRV_PCM_RATE_96000 |\
+ SNDRV_PCM_RATE_176400 |\
+ SNDRV_PCM_RATE_192000)
+#define AK4613_PCM_FMTBIT (SNDRV_PCM_FMTBIT_S24_LE)
+
+static struct snd_soc_dai_driver ak4613_dai = {
+ .name = "ak4613-hifi",
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = AK4613_PCM_RATE,
+ .formats = AK4613_PCM_FMTBIT,
+ },
+ .capture = {
+ .stream_name = "Capture",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = AK4613_PCM_RATE,
+ .formats = AK4613_PCM_FMTBIT,
+ },
+ .ops = &ak4613_dai_ops,
+ .symmetric_rates = 1,
+};
+
+static int ak4613_suspend(struct snd_soc_component *component)
+{
+ struct regmap *regmap = dev_get_regmap(component->dev, NULL);
+
+ regcache_cache_only(regmap, true);
+ regcache_mark_dirty(regmap);
+ return 0;
+}
+
+static int ak4613_resume(struct snd_soc_component *component)
+{
+ struct regmap *regmap = dev_get_regmap(component->dev, NULL);
+
+ regcache_cache_only(regmap, false);
+ return regcache_sync(regmap);
+}
+
+static const struct snd_soc_component_driver soc_component_dev_ak4613 = {
+ .suspend = ak4613_suspend,
+ .resume = ak4613_resume,
+ .set_bias_level = ak4613_set_bias_level,
+ .controls = ak4613_snd_controls,
+ .num_controls = ARRAY_SIZE(ak4613_snd_controls),
+ .dapm_widgets = ak4613_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(ak4613_dapm_widgets),
+ .dapm_routes = ak4613_intercon,
+ .num_dapm_routes = ARRAY_SIZE(ak4613_intercon),
+ .idle_bias_on = 1,
+ .endianness = 1,
+ .non_legacy_dai_naming = 1,
+};
+
+static void ak4613_parse_of(struct ak4613_priv *priv,
+ struct device *dev)
+{
+ struct device_node *np = dev->of_node;
+ char prop[32];
+ int i;
+
+ /* Input 1 - 2 */
+ for (i = 0; i < 2; i++) {
+ snprintf(prop, sizeof(prop), "asahi-kasei,in%d-single-end", i + 1);
+ if (!of_get_property(np, prop, NULL))
+ priv->ic |= 1 << i;
+ }
+
+ /* Output 1 - 6 */
+ for (i = 0; i < 6; i++) {
+ snprintf(prop, sizeof(prop), "asahi-kasei,out%d-single-end", i + 1);
+ if (!of_get_property(np, prop, NULL))
+ priv->oc |= 1 << i;
+ }
+}
+
+static int ak4613_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &i2c->dev;
+ struct device_node *np = dev->of_node;
+ const struct regmap_config *regmap_cfg;
+ struct regmap *regmap;
+ struct ak4613_priv *priv;
+
+ regmap_cfg = NULL;
+ if (np) {
+ const struct of_device_id *of_id;
+
+ of_id = of_match_device(ak4613_of_match, dev);
+ if (of_id)
+ regmap_cfg = of_id->data;
+ } else {
+ regmap_cfg = (const struct regmap_config *)id->driver_data;
+ }
+
+ if (!regmap_cfg)
+ return -EINVAL;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ ak4613_parse_of(priv, dev);
+
+ priv->iface = NULL;
+ priv->cnt = 0;
+ priv->sysclk = 0;
+ INIT_WORK(&priv->dummy_write_work, ak4613_dummy_write);
+
+ mutex_init(&priv->lock);
+
+ i2c_set_clientdata(i2c, priv);
+
+ regmap = devm_regmap_init_i2c(i2c, regmap_cfg);
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
+
+ return devm_snd_soc_register_component(dev, &soc_component_dev_ak4613,
+ &ak4613_dai, 1);
+}
+
+static int ak4613_i2c_remove(struct i2c_client *client)
+{
+ return 0;
+}
+
+static struct i2c_driver ak4613_i2c_driver = {
+ .driver = {
+ .name = "ak4613-codec",
+ .of_match_table = ak4613_of_match,
+ },
+ .probe = ak4613_i2c_probe,
+ .remove = ak4613_i2c_remove,
+ .id_table = ak4613_i2c_id,
+};
+
+module_i2c_driver(ak4613_i2c_driver);
+
+MODULE_DESCRIPTION("Soc AK4613 driver");
+MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
+MODULE_LICENSE("GPL v2");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 19:47:18 +0000