#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/spi/spi.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/initval.h>
#include <sound/tlv.h>
#include "wm8770.h"
#define WM8770_NUM_SUPPLIES 3
static const char *wm8770_supply_names[WM8770_NUM_SUPPLIES] = {
"AVDD1",
"AVDD2",
"DVDD"
};
static const struct reg_default wm8770_reg_defaults[] = {
{ 0, 0x7f },
{ 1, 0x7f },
{ 2, 0x7f },
{ 3, 0x7f },
{ 4, 0x7f },
{ 5, 0x7f },
{ 6, 0x7f },
{ 7, 0x7f },
{ 8, 0x7f },
{ 9, 0xff },
{ 10, 0xff },
{ 11, 0xff },
{ 12, 0xff },
{ 13, 0xff },
{ 14, 0xff },
{ 15, 0xff },
{ 16, 0xff },
{ 17, 0xff },
{ 18, 0 },
{ 19, 0x90 },
{ 20, 0 },
{ 21, 0 },
{ 22, 0x22 },
{ 23, 0x22 },
{ 24, 0x3e },
{ 25, 0xc },
{ 26, 0xc },
{ 27, 0x100 },
{ 28, 0x189 },
{ 29, 0x189 },
{ 30, 0x8770 },
};
static bool wm8770_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case WM8770_RESET:
return true;
default:
return false;
}
}
struct wm8770_priv {
struct regmap *regmap;
struct regulator_bulk_data supplies[WM8770_NUM_SUPPLIES];
struct notifier_block disable_nb[WM8770_NUM_SUPPLIES];
struct snd_soc_component *component;
int sysclk;
};
static int vout12supply_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event);
static int vout34supply_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event);
#define WM8770_REGULATOR_EVENT(n) \
static int wm8770_regulator_event_##n(struct notifier_block *nb, \
unsigned long event, void *data) \
{ \
struct wm8770_priv *wm8770 = container_of(nb, struct wm8770_priv, \
disable_nb[n]); \
if (event & REGULATOR_EVENT_DISABLE) { \
regcache_mark_dirty(wm8770->regmap); \
} \
return 0; \
}
WM8770_REGULATOR_EVENT(0)
WM8770_REGULATOR_EVENT(1)
WM8770_REGULATOR_EVENT(2)
static const DECLARE_TLV_DB_SCALE(adc_tlv, -1200, 100, 0);
static const DECLARE_TLV_DB_SCALE(dac_dig_tlv, -12750, 50, 1);
static const DECLARE_TLV_DB_SCALE(dac_alg_tlv, -12700, 100, 1);
static const char *dac_phase_text[][2] = {
{ "DAC1 Normal", "DAC1 Inverted" },
{ "DAC2 Normal", "DAC2 Inverted" },
{ "DAC3 Normal", "DAC3 Inverted" },
{ "DAC4 Normal", "DAC4 Inverted" },
};
static const struct soc_enum dac_phase[] = {
SOC_ENUM_DOUBLE(WM8770_DACPHASE, 0, 1, 2, dac_phase_text[0]),
SOC_ENUM_DOUBLE(WM8770_DACPHASE, 2, 3, 2, dac_phase_text[1]),
SOC_ENUM_DOUBLE(WM8770_DACPHASE, 4, 5, 2, dac_phase_text[2]),
SOC_ENUM_DOUBLE(WM8770_DACPHASE, 6, 7, 2, dac_phase_text[3]),
};
static const struct snd_kcontrol_new wm8770_snd_controls[] = {
SOC_SINGLE_TLV("DAC Playback Volume", WM8770_MSDIGVOL, 0, 255, 0,
dac_dig_tlv),
SOC_SINGLE("DAC Playback Switch", WM8770_DACMUTE, 4, 1, 1),
SOC_SINGLE("DAC Playback ZC Switch", WM8770_DACCTRL1, 0, 1, 0),
SOC_SINGLE_TLV("VOUT Playback Volume", WM8770_MSALGVOL, 0, 127, 0,
dac_alg_tlv),
SOC_SINGLE("VOUT Playback ZC Switch", WM8770_MSALGVOL, 7, 1, 0),
SOC_DOUBLE_R_TLV("VOUT1 Playback Volume", WM8770_VOUT1LVOL,
WM8770_VOUT1RVOL, 0, 127, 0, dac_alg_tlv),
SOC_DOUBLE_R("VOUT1 Playback ZC Switch", WM8770_VOUT1LVOL,
WM8770_VOUT1RVOL, 7, 1, 0),
SOC_DOUBLE_R_TLV("VOUT2 Playback Volume", WM8770_VOUT2LVOL,
WM8770_VOUT2RVOL, 0, 127, 0, dac_alg_tlv),
SOC_DOUBLE_R("VOUT2 Playback ZC Switch", WM8770_VOUT2LVOL,
WM8770_VOUT2RVOL, 7, 1, 0),
SOC_DOUBLE_R_TLV("VOUT3 Playback Volume", WM8770_VOUT3LVOL,
WM8770_VOUT3RVOL, 0, 127, 0, dac_alg_tlv),
SOC_DOUBLE_R("VOUT3 Playback ZC Switch", WM8770_VOUT3LVOL,
WM8770_VOUT3RVOL, 7, 1, 0),
SOC_DOUBLE_R_TLV("VOUT4 Playback Volume", WM8770_VOUT4LVOL,
WM8770_VOUT4RVOL, 0, 127, 0, dac_alg_tlv),
SOC_DOUBLE_R("VOUT4 Playback ZC Switch", WM8770_VOUT4LVOL,
WM8770_VOUT4RVOL, 7, 1, 0),
SOC_DOUBLE_R_TLV("DAC1 Playback Volume", WM8770_DAC1LVOL,
WM8770_DAC1RVOL, 0, 255, 0, dac_dig_tlv),
SOC_SINGLE("DAC1 Deemphasis Switch", WM8770_DACCTRL2, 0, 1, 0),
SOC_ENUM("DAC1 Phase", dac_phase[0]),
SOC_DOUBLE_R_TLV("DAC2 Playback Volume", WM8770_DAC2LVOL,
WM8770_DAC2RVOL, 0, 255, 0, dac_dig_tlv),
SOC_SINGLE("DAC2 Deemphasis Switch", WM8770_DACCTRL2, 1, 1, 0),
SOC_ENUM("DAC2 Phase", dac_phase[1]),
SOC_DOUBLE_R_TLV("DAC3 Playback Volume", WM8770_DAC3LVOL,
WM8770_DAC3RVOL, 0, 255, 0, dac_dig_tlv),
SOC_SINGLE("DAC3 Deemphasis Switch", WM8770_DACCTRL2, 2, 1, 0),
SOC_ENUM("DAC3 Phase", dac_phase[2]),
SOC_DOUBLE_R_TLV("DAC4 Playback Volume", WM8770_DAC4LVOL,
WM8770_DAC4RVOL, 0, 255, 0, dac_dig_tlv),
SOC_SINGLE("DAC4 Deemphasis Switch", WM8770_DACCTRL2, 3, 1, 0),
SOC_ENUM("DAC4 Phase", dac_phase[3]),
SOC_DOUBLE_R_TLV("Capture Volume", WM8770_ADCLCTRL, WM8770_ADCRCTRL,
0, 31, 0, adc_tlv),
SOC_DOUBLE_R("Capture Switch", WM8770_ADCLCTRL, WM8770_ADCRCTRL,
5, 1, 1),
SOC_SINGLE("ADC 128x Oversampling Switch", WM8770_MSTRCTRL, 3, 1, 0),
SOC_SINGLE("ADC Highpass Filter Switch", WM8770_IFACECTRL, 8, 1, 1)
};
static const char *ain_text[] = {
"AIN1", "AIN2", "AIN3", "AIN4",
"AIN5", "AIN6", "AIN7", "AIN8"
};
static SOC_ENUM_DOUBLE_DECL(ain_enum,
WM8770_ADCMUX, 0, 4, ain_text);
static const struct snd_kcontrol_new ain_mux =
SOC_DAPM_ENUM("Capture Mux", ain_enum);
static const struct snd_kcontrol_new vout1_mix_controls[] = {
SOC_DAPM_SINGLE("DAC1 Switch", WM8770_OUTMUX1, 0, 1, 0),
SOC_DAPM_SINGLE("AUX1 Switch", WM8770_OUTMUX1, 1, 1, 0),
SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX1, 2, 1, 0)
};
static const struct snd_kcontrol_new vout2_mix_controls[] = {
SOC_DAPM_SINGLE("DAC2 Switch", WM8770_OUTMUX1, 3, 1, 0),
SOC_DAPM_SINGLE("AUX2 Switch", WM8770_OUTMUX1, 4, 1, 0),
SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX1, 5, 1, 0)
};
static const struct snd_kcontrol_new vout3_mix_controls[] = {
SOC_DAPM_SINGLE("DAC3 Switch", WM8770_OUTMUX2, 0, 1, 0),
SOC_DAPM_SINGLE("AUX3 Switch", WM8770_OUTMUX2, 1, 1, 0),
SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX2, 2, 1, 0)
};
static const struct snd_kcontrol_new vout4_mix_controls[] = {
SOC_DAPM_SINGLE("DAC4 Switch", WM8770_OUTMUX2, 3, 1, 0),
SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX2, 4, 1, 0)
};
static const struct snd_soc_dapm_widget wm8770_dapm_widgets[] = {
SND_SOC_DAPM_INPUT("AUX1"),
SND_SOC_DAPM_INPUT("AUX2"),
SND_SOC_DAPM_INPUT("AUX3"),
SND_SOC_DAPM_INPUT("AIN1"),
SND_SOC_DAPM_INPUT("AIN2"),
SND_SOC_DAPM_INPUT("AIN3"),
SND_SOC_DAPM_INPUT("AIN4"),
SND_SOC_DAPM_INPUT("AIN5"),
SND_SOC_DAPM_INPUT("AIN6"),
SND_SOC_DAPM_INPUT("AIN7"),
SND_SOC_DAPM_INPUT("AIN8"),
SND_SOC_DAPM_MUX("Capture Mux", WM8770_ADCMUX, 8, 1, &ain_mux),
SND_SOC_DAPM_ADC("ADC", "Capture", WM8770_PWDNCTRL, 1, 1),
SND_SOC_DAPM_DAC("DAC1", "Playback", WM8770_PWDNCTRL, 2, 1),
SND_SOC_DAPM_DAC("DAC2", "Playback", WM8770_PWDNCTRL, 3, 1),
SND_SOC_DAPM_DAC("DAC3", "Playback", WM8770_PWDNCTRL, 4, 1),
SND_SOC_DAPM_DAC("DAC4", "Playback", WM8770_PWDNCTRL, 5, 1),
SND_SOC_DAPM_SUPPLY("VOUT12 Supply", SND_SOC_NOPM, 0, 0,
vout12supply_event, SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_SUPPLY("VOUT34 Supply", SND_SOC_NOPM, 0, 0,
vout34supply_event, SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_MIXER("VOUT1 Mixer", SND_SOC_NOPM, 0, 0,
vout1_mix_controls, ARRAY_SIZE(vout1_mix_controls)),
SND_SOC_DAPM_MIXER("VOUT2 Mixer", SND_SOC_NOPM, 0, 0,
vout2_mix_controls, ARRAY_SIZE(vout2_mix_controls)),
SND_SOC_DAPM_MIXER("VOUT3 Mixer", SND_SOC_NOPM, 0, 0,
vout3_mix_controls, ARRAY_SIZE(vout3_mix_controls)),
SND_SOC_DAPM_MIXER("VOUT4 Mixer", SND_SOC_NOPM, 0, 0,
vout4_mix_controls, ARRAY_SIZE(vout4_mix_controls)),
SND_SOC_DAPM_OUTPUT("VOUT1"),
SND_SOC_DAPM_OUTPUT("VOUT2"),
SND_SOC_DAPM_OUTPUT("VOUT3"),
SND_SOC_DAPM_OUTPUT("VOUT4")
};
static const struct snd_soc_dapm_route wm8770_intercon[] = {
{ "Capture Mux", "AIN1", "AIN1" },
{ "Capture Mux", "AIN2", "AIN2" },
{ "Capture Mux", "AIN3", "AIN3" },
{ "Capture Mux", "AIN4", "AIN4" },
{ "Capture Mux", "AIN5", "AIN5" },
{ "Capture Mux", "AIN6", "AIN6" },
{ "Capture Mux", "AIN7", "AIN7" },
{ "Capture Mux", "AIN8", "AIN8" },
{ "ADC", NULL, "Capture Mux" },
{ "VOUT1 Mixer", NULL, "VOUT12 Supply" },
{ "VOUT1 Mixer", "DAC1 Switch", "DAC1" },
{ "VOUT1 Mixer", "AUX1 Switch", "AUX1" },
{ "VOUT1 Mixer", "Bypass Switch", "Capture Mux" },
{ "VOUT2 Mixer", NULL, "VOUT12 Supply" },
{ "VOUT2 Mixer", "DAC2 Switch", "DAC2" },
{ "VOUT2 Mixer", "AUX2 Switch", "AUX2" },
{ "VOUT2 Mixer", "Bypass Switch", "Capture Mux" },
{ "VOUT3 Mixer", NULL, "VOUT34 Supply" },
{ "VOUT3 Mixer", "DAC3 Switch", "DAC3" },
{ "VOUT3 Mixer", "AUX3 Switch", "AUX3" },
{ "VOUT3 Mixer", "Bypass Switch", "Capture Mux" },
{ "VOUT4 Mixer", NULL, "VOUT34 Supply" },
{ "VOUT4 Mixer", "DAC4 Switch", "DAC4" },
{ "VOUT4 Mixer", "Bypass Switch", "Capture Mux" },
{ "VOUT1", NULL, "VOUT1 Mixer" },
{ "VOUT2", NULL, "VOUT2 Mixer" },
{ "VOUT3", NULL, "VOUT3 Mixer" },
{ "VOUT4", NULL, "VOUT4 Mixer" }
};
static int vout12supply_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
switch (event) {
case SND_SOC_DAPM_PRE_PMU:
snd_soc_component_update_bits(component, WM8770_OUTMUX1, 0x180, 0);
break;
case SND_SOC_DAPM_POST_PMD:
snd_soc_component_update_bits(component, WM8770_OUTMUX1, 0x180, 0x180);
break;
}
return 0;
}
static int vout34supply_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
switch (event) {
case SND_SOC_DAPM_PRE_PMU:
snd_soc_component_update_bits(component, WM8770_OUTMUX2, 0x180, 0);
break;
case SND_SOC_DAPM_POST_PMD:
snd_soc_component_update_bits(component, WM8770_OUTMUX2, 0x180, 0x180);
break;
}
return 0;
}
static int wm8770_reset(struct snd_soc_component *component)
{
return snd_soc_component_write(component, WM8770_RESET, 0);
}
static int wm8770_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
struct snd_soc_component *component;
int iface, master;
component = dai->component;
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBP_CFP:
master = 0x100;
break;
case SND_SOC_DAIFMT_CBC_CFC:
master = 0;
break;
default:
return -EINVAL;
}
iface = 0;
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
iface |= 0x2;
break;
case SND_SOC_DAIFMT_RIGHT_J:
break;
case SND_SOC_DAIFMT_LEFT_J:
iface |= 0x1;
break;
default:
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
break;
case SND_SOC_DAIFMT_IB_IF:
iface |= 0xc;
break;
case SND_SOC_DAIFMT_IB_NF:
iface |= 0x8;
break;
case SND_SOC_DAIFMT_NB_IF:
iface |= 0x4;
break;
default:
return -EINVAL;
}
snd_soc_component_update_bits(component, WM8770_IFACECTRL, 0xf, iface);
snd_soc_component_update_bits(component, WM8770_MSTRCTRL, 0x100, master);
return 0;
}
static const int mclk_ratios[] = {
128,
192,
256,
384,
512,
768
};
static int wm8770_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component;
struct wm8770_priv *wm8770;
int i;
int iface;
int shift;
int ratio;
component = dai->component;
wm8770 = snd_soc_component_get_drvdata(component);
iface = 0;
switch (params_width(params)) {
case 16:
break;
case 20:
iface |= 0x10;
break;
case 24:
iface |= 0x20;
break;
case 32:
iface |= 0x30;
break;
}
switch (substream->stream) {
case SNDRV_PCM_STREAM_PLAYBACK:
i = 0;
shift = 4;
break;
case SNDRV_PCM_STREAM_CAPTURE:
i = 2;
shift = 0;
break;
default:
return -EINVAL;
}
if (snd_soc_component_read(component, WM8770_MSTRCTRL) & 0x100) {
for (; i < ARRAY_SIZE(mclk_ratios); ++i) {
ratio = wm8770->sysclk / params_rate(params);
if (ratio == mclk_ratios[i])
break;
}
if (i == ARRAY_SIZE(mclk_ratios)) {
dev_err(component->dev,
"Unable to configure MCLK ratio %d/%d\n",
wm8770->sysclk, params_rate(params));
return -EINVAL;
}
dev_dbg(component->dev, "MCLK is %dfs\n", mclk_ratios[i]);
snd_soc_component_update_bits(component, WM8770_MSTRCTRL, 0x7 << shift,
i << shift);
}
snd_soc_component_update_bits(component, WM8770_IFACECTRL, 0x30, iface);
return 0;
}
static int wm8770_mute(struct snd_soc_dai *dai, int mute, int direction)
{
struct snd_soc_component *component;
component = dai->component;
return snd_soc_component_update_bits(component, WM8770_DACMUTE, 0x10,
!!mute << 4);
}
static int wm8770_set_sysclk(struct snd_soc_dai *dai,
int clk_id, unsigned int freq, int dir)
{
struct snd_soc_component *component;
struct wm8770_priv *wm8770;
component = dai->component;
wm8770 = snd_soc_component_get_drvdata(component);
wm8770->sysclk = freq;
return 0;
}
static int wm8770_set_bias_level(struct snd_soc_component *component,
enum snd_soc_bias_level level)
{
int ret;
struct snd_soc_dapm_context *dapm = snd_soc_component_to_dapm(component);
struct wm8770_priv *wm8770;
wm8770 = snd_soc_component_get_drvdata(component);
switch (level) {
case SND_SOC_BIAS_ON:
break;
case SND_SOC_BIAS_PREPARE:
break;
case SND_SOC_BIAS_STANDBY:
if (snd_soc_dapm_get_bias_level(dapm) == SND_SOC_BIAS_OFF) {
ret = regulator_bulk_enable(ARRAY_SIZE(wm8770->supplies),
wm8770->supplies);
if (ret) {
dev_err(component->dev,
"Failed to enable supplies: %d\n",
ret);
return ret;
}
regcache_sync(wm8770->regmap);
snd_soc_component_write(component, WM8770_PWDNCTRL, 0);
}
break;
case SND_SOC_BIAS_OFF:
snd_soc_component_write(component, WM8770_PWDNCTRL, 1);
regulator_bulk_disable(ARRAY_SIZE(wm8770->supplies),
wm8770->supplies);
break;
}
return 0;
}
#define WM8770_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
static const struct snd_soc_dai_ops wm8770_dai_ops = {
.mute_stream = wm8770_mute,
.hw_params = wm8770_hw_params,
.set_fmt = wm8770_set_fmt,
.set_sysclk = wm8770_set_sysclk,
.no_capture_mute = 1,
};
static struct snd_soc_dai_driver wm8770_dai = {
.name = "wm8770-hifi",
.playback = {
.stream_name = "Playback",
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_192000,
.formats = WM8770_FORMATS
},
.capture = {
.stream_name = "Capture",
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_96000,
.formats = WM8770_FORMATS
},
.ops = &wm8770_dai_ops,
.symmetric_rate = 1
};
static int wm8770_probe(struct snd_soc_component *component)
{
struct wm8770_priv *wm8770;
int ret;
wm8770 = snd_soc_component_get_drvdata(component);
wm8770->component = component;
ret = regulator_bulk_enable(ARRAY_SIZE(wm8770->supplies),
wm8770->supplies);
if (ret) {
dev_err(component->dev, "Failed to enable supplies: %d\n", ret);
return ret;
}
ret = wm8770_reset(component);
if (ret < 0) {
dev_err(component->dev, "Failed to issue reset: %d\n", ret);
goto err_reg_enable;
}
snd_soc_component_update_bits(component, WM8770_MSDIGVOL, 0x100, 0x100);
snd_soc_component_update_bits(component, WM8770_MSALGVOL, 0x100, 0x100);
snd_soc_component_update_bits(component, WM8770_VOUT1RVOL, 0x100, 0x100);
snd_soc_component_update_bits(component, WM8770_VOUT2RVOL, 0x100, 0x100);
snd_soc_component_update_bits(component, WM8770_VOUT3RVOL, 0x100, 0x100);
snd_soc_component_update_bits(component, WM8770_VOUT4RVOL, 0x100, 0x100);
snd_soc_component_update_bits(component, WM8770_DAC1RVOL, 0x100, 0x100);
snd_soc_component_update_bits(component, WM8770_DAC2RVOL, 0x100, 0x100);
snd_soc_component_update_bits(component, WM8770_DAC3RVOL, 0x100, 0x100);
snd_soc_component_update_bits(component, WM8770_DAC4RVOL, 0x100, 0x100);
snd_soc_component_update_bits(component, WM8770_DACMUTE, 0x10, 0x10);
err_reg_enable:
regulator_bulk_disable(ARRAY_SIZE(wm8770->supplies), wm8770->supplies);
return ret;
}
static const struct snd_soc_component_driver soc_component_dev_wm8770 = {
.probe = wm8770_probe,
.set_bias_level = wm8770_set_bias_level,
.controls = wm8770_snd_controls,
.num_controls = ARRAY_SIZE(wm8770_snd_controls),
.dapm_widgets = wm8770_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(wm8770_dapm_widgets),
.dapm_routes = wm8770_intercon,
.num_dapm_routes = ARRAY_SIZE(wm8770_intercon),
.use_pmdown_time = 1,
.endianness = 1,
};
static const struct of_device_id wm8770_of_match[] = {
{ .compatible = "wlf,wm8770", },
{ }
};
MODULE_DEVICE_TABLE(of, wm8770_of_match);
static const struct regmap_config wm8770_regmap = {
.reg_bits = 7,
.val_bits = 9,
.max_register = WM8770_RESET,
.reg_defaults = wm8770_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(wm8770_reg_defaults),
.cache_type = REGCACHE_MAPLE,
.volatile_reg = wm8770_volatile_reg,
};
static int wm8770_spi_probe(struct spi_device *spi)
{
struct wm8770_priv *wm8770;
int ret, i;
wm8770 = devm_kzalloc(&spi->dev, sizeof(struct wm8770_priv),
GFP_KERNEL);
if (!wm8770)
return -ENOMEM;
for (i = 0; i < ARRAY_SIZE(wm8770->supplies); i++)
wm8770->supplies[i].supply = wm8770_supply_names[i];
ret = devm_regulator_bulk_get(&spi->dev, ARRAY_SIZE(wm8770->supplies),
wm8770->supplies);
if (ret) {
dev_err(&spi->dev, "Failed to request supplies: %d\n", ret);
return ret;
}
wm8770->disable_nb[0].notifier_call = wm8770_regulator_event_0;
wm8770->disable_nb[1].notifier_call = wm8770_regulator_event_1;
wm8770->disable_nb[2].notifier_call = wm8770_regulator_event_2;
for (i = 0; i < ARRAY_SIZE(wm8770->supplies); i++) {
ret = devm_regulator_register_notifier(
wm8770->supplies[i].consumer,
&wm8770->disable_nb[i]);
if (ret) {
dev_err(&spi->dev,
"Failed to register regulator notifier: %d\n",
ret);
}
}
wm8770->regmap = devm_regmap_init_spi(spi, &wm8770_regmap);
if (IS_ERR(wm8770->regmap))
return PTR_ERR(wm8770->regmap);
spi_set_drvdata(spi, wm8770);
ret = devm_snd_soc_register_component(&spi->dev,
&soc_component_dev_wm8770, &wm8770_dai, 1);
return ret;
}
static struct spi_driver wm8770_spi_driver = {
.driver = {
.name = "wm8770",
.of_match_table = wm8770_of_match,
},
.probe = wm8770_spi_probe,
};
module_spi_driver(wm8770_spi_driver);
MODULE_DESCRIPTION("ASoC WM8770 driver");
MODULE_AUTHOR("Dimitris Papastamos <dp@opensource.wolfsonmicro.com>");
MODULE_LICENSE("GPL");
