// SPDX-License-Identifier: GPL-2.0
//
// ALSA SoC Texas Instruments TAS2770 20-W Digital Input Mono Class-D
// Audio Amplifier with Speaker I/V Sense
//
// Copyright (C) 2016-2017 Texas Instruments Incorporated - https://www.ti.com/
// Author: Tracy Yi <[email protected]>
// Frank Shi <[email protected]>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/gpio/consumer.h>
#include <linux/regulator/consumer.h>
#include <linux/firmware.h>
#include <linux/regmap.h>
#include <linux/of.h>
#include <linux/slab.h>
#include <sound/soc.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/initval.h>
#include <sound/tlv.h>
#include "tas2770.h"
#define TAS2770_MDELAY 0xFFFFFFFE
static void tas2770_reset(struct tas2770_priv *tas2770)
{
if (tas2770->reset_gpio) {
gpiod_set_value_cansleep(tas2770->reset_gpio, 0);
msleep(20);
gpiod_set_value_cansleep(tas2770->reset_gpio, 1);
usleep_range(1000, 2000);
}
snd_soc_component_write(tas2770->component, TAS2770_SW_RST,
TAS2770_RST);
usleep_range(1000, 2000);
}
static int tas2770_update_pwr_ctrl(struct tas2770_priv *tas2770)
{
struct snd_soc_component *component = tas2770->component;
unsigned int val;
int ret;
if (tas2770->dac_powered)
val = tas2770->unmuted ?
TAS2770_PWR_CTRL_ACTIVE : TAS2770_PWR_CTRL_MUTE;
else
val = TAS2770_PWR_CTRL_SHUTDOWN;
ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
TAS2770_PWR_CTRL_MASK, val);
if (ret < 0)
return ret;
return 0;
}
#ifdef CONFIG_PM
static int tas2770_codec_suspend(struct snd_soc_component *component)
{
struct tas2770_priv *tas2770 = snd_soc_component_get_drvdata(component);
int ret = 0;
regcache_cache_only(tas2770->regmap, true);
regcache_mark_dirty(tas2770->regmap);
if (tas2770->sdz_gpio) {
gpiod_set_value_cansleep(tas2770->sdz_gpio, 0);
} else {
ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
TAS2770_PWR_CTRL_MASK,
TAS2770_PWR_CTRL_SHUTDOWN);
if (ret < 0) {
regcache_cache_only(tas2770->regmap, false);
regcache_sync(tas2770->regmap);
return ret;
}
ret = 0;
}
return ret;
}
static int tas2770_codec_resume(struct snd_soc_component *component)
{
struct tas2770_priv *tas2770 = snd_soc_component_get_drvdata(component);
int ret;
if (tas2770->sdz_gpio) {
gpiod_set_value_cansleep(tas2770->sdz_gpio, 1);
usleep_range(1000, 2000);
} else {
ret = tas2770_update_pwr_ctrl(tas2770);
if (ret < 0)
return ret;
}
regcache_cache_only(tas2770->regmap, false);
return regcache_sync(tas2770->regmap);
}
#else
#define tas2770_codec_suspend NULL
#define tas2770_codec_resume NULL
#endif
static const char * const tas2770_ASI1_src[] = {
"I2C offset", "Left", "Right", "LeftRightDiv2",
};
static SOC_ENUM_SINGLE_DECL(
tas2770_ASI1_src_enum, TAS2770_TDM_CFG_REG2,
4, tas2770_ASI1_src);
static const struct snd_kcontrol_new tas2770_asi1_mux =
SOC_DAPM_ENUM("ASI1 Source", tas2770_ASI1_src_enum);
static int tas2770_dac_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);
struct tas2770_priv *tas2770 =
snd_soc_component_get_drvdata(component);
int ret;
switch (event) {
case SND_SOC_DAPM_POST_PMU:
tas2770->dac_powered = 1;
ret = tas2770_update_pwr_ctrl(tas2770);
break;
case SND_SOC_DAPM_PRE_PMD:
tas2770->dac_powered = 0;
ret = tas2770_update_pwr_ctrl(tas2770);
break;
default:
dev_err(tas2770->dev, "Not supported evevt\n");
return -EINVAL;
}
return ret;
}
static const struct snd_kcontrol_new isense_switch =
SOC_DAPM_SINGLE("Switch", TAS2770_PWR_CTRL, 3, 1, 1);
static const struct snd_kcontrol_new vsense_switch =
SOC_DAPM_SINGLE("Switch", TAS2770_PWR_CTRL, 2, 1, 1);
static const struct snd_soc_dapm_widget tas2770_dapm_widgets[] = {
SND_SOC_DAPM_AIF_IN("ASI1", "ASI1 Playback", 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_MUX("ASI1 Sel", SND_SOC_NOPM, 0, 0, &tas2770_asi1_mux),
SND_SOC_DAPM_SWITCH("ISENSE", TAS2770_PWR_CTRL, 3, 1, &isense_switch),
SND_SOC_DAPM_SWITCH("VSENSE", TAS2770_PWR_CTRL, 2, 1, &vsense_switch),
SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, tas2770_dac_event,
SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
SND_SOC_DAPM_OUTPUT("OUT"),
SND_SOC_DAPM_SIGGEN("VMON"),
SND_SOC_DAPM_SIGGEN("IMON")
};
static const struct snd_soc_dapm_route tas2770_audio_map[] = {
{"ASI1 Sel", "I2C offset", "ASI1"},
{"ASI1 Sel", "Left", "ASI1"},
{"ASI1 Sel", "Right", "ASI1"},
{"ASI1 Sel", "LeftRightDiv2", "ASI1"},
{"DAC", NULL, "ASI1 Sel"},
{"OUT", NULL, "DAC"},
{"ISENSE", "Switch", "IMON"},
{"VSENSE", "Switch", "VMON"},
};
static int tas2770_mute(struct snd_soc_dai *dai, int mute, int direction)
{
struct snd_soc_component *component = dai->component;
struct tas2770_priv *tas2770 =
snd_soc_component_get_drvdata(component);
tas2770->unmuted = !mute;
return tas2770_update_pwr_ctrl(tas2770);
}
static int tas2770_set_bitwidth(struct tas2770_priv *tas2770, int bitwidth)
{
int ret;
struct snd_soc_component *component = tas2770->component;
switch (bitwidth) {
case SNDRV_PCM_FORMAT_S16_LE:
ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
TAS2770_TDM_CFG_REG2_RXW_MASK,
TAS2770_TDM_CFG_REG2_RXW_16BITS);
tas2770->v_sense_slot = tas2770->i_sense_slot + 2;
break;
case SNDRV_PCM_FORMAT_S24_LE:
ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
TAS2770_TDM_CFG_REG2_RXW_MASK,
TAS2770_TDM_CFG_REG2_RXW_24BITS);
tas2770->v_sense_slot = tas2770->i_sense_slot + 4;
break;
case SNDRV_PCM_FORMAT_S32_LE:
ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
TAS2770_TDM_CFG_REG2_RXW_MASK,
TAS2770_TDM_CFG_REG2_RXW_32BITS);
tas2770->v_sense_slot = tas2770->i_sense_slot + 4;
break;
default:
return -EINVAL;
}
if (ret < 0)
return ret;
ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG5,
TAS2770_TDM_CFG_REG5_VSNS_MASK |
TAS2770_TDM_CFG_REG5_50_MASK,
TAS2770_TDM_CFG_REG5_VSNS_ENABLE |
tas2770->v_sense_slot);
if (ret < 0)
return ret;
ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG6,
TAS2770_TDM_CFG_REG6_ISNS_MASK |
TAS2770_TDM_CFG_REG6_50_MASK,
TAS2770_TDM_CFG_REG6_ISNS_ENABLE |
tas2770->i_sense_slot);
if (ret < 0)
return ret;
return 0;
}
static int tas2770_set_samplerate(struct tas2770_priv *tas2770, int samplerate)
{
struct snd_soc_component *component = tas2770->component;
int ramp_rate_val;
int ret;
switch (samplerate) {
case 48000:
ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ |
TAS2770_TDM_CFG_REG0_31_44_1_48KHZ;
break;
case 44100:
ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ |
TAS2770_TDM_CFG_REG0_31_44_1_48KHZ;
break;
case 96000:
ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ |
TAS2770_TDM_CFG_REG0_31_88_2_96KHZ;
break;
case 88200:
ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ |
TAS2770_TDM_CFG_REG0_31_88_2_96KHZ;
break;
case 192000:
ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ |
TAS2770_TDM_CFG_REG0_31_176_4_192KHZ;
break;
case 176400:
ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ |
TAS2770_TDM_CFG_REG0_31_176_4_192KHZ;
break;
default:
return -EINVAL;
}
ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG0,
TAS2770_TDM_CFG_REG0_SMP_MASK |
TAS2770_TDM_CFG_REG0_31_MASK,
ramp_rate_val);
if (ret < 0)
return ret;
return 0;
}
static int tas2770_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 tas2770_priv *tas2770 =
snd_soc_component_get_drvdata(component);
int ret;
ret = tas2770_set_bitwidth(tas2770, params_format(params));
if (ret)
return ret;
return tas2770_set_samplerate(tas2770, params_rate(params));
}
static int tas2770_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
struct snd_soc_component *component = dai->component;
struct tas2770_priv *tas2770 =
snd_soc_component_get_drvdata(component);
u8 tdm_rx_start_slot = 0, invert_fpol = 0, fpol_preinv = 0, asi_cfg_1 = 0;
int ret;
switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
case SND_SOC_DAIFMT_CBC_CFC:
break;
default:
dev_err(tas2770->dev, "ASI invalid DAI clocking\n");
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_IF:
invert_fpol = 1;
fallthrough;
case SND_SOC_DAIFMT_NB_NF:
asi_cfg_1 |= TAS2770_TDM_CFG_REG1_RX_RSING;
break;
case SND_SOC_DAIFMT_IB_IF:
invert_fpol = 1;
fallthrough;
case SND_SOC_DAIFMT_IB_NF:
asi_cfg_1 |= TAS2770_TDM_CFG_REG1_RX_FALING;
break;
default:
dev_err(tas2770->dev, "ASI format Inverse is not found\n");
return -EINVAL;
}
ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG1,
TAS2770_TDM_CFG_REG1_RX_MASK,
asi_cfg_1);
if (ret < 0)
return ret;
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
tdm_rx_start_slot = 1;
fpol_preinv = 0;
break;
case SND_SOC_DAIFMT_DSP_A:
tdm_rx_start_slot = 0;
fpol_preinv = 1;
break;
case SND_SOC_DAIFMT_DSP_B:
tdm_rx_start_slot = 1;
fpol_preinv = 1;
break;
case SND_SOC_DAIFMT_LEFT_J:
tdm_rx_start_slot = 0;
fpol_preinv = 1;
break;
default:
dev_err(tas2770->dev,
"DAI Format is not found, fmt=0x%x\n", fmt);
return -EINVAL;
}
ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG1,
TAS2770_TDM_CFG_REG1_MASK,
(tdm_rx_start_slot << TAS2770_TDM_CFG_REG1_51_SHIFT));
if (ret < 0)
return ret;
ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG0,
TAS2770_TDM_CFG_REG0_FPOL_MASK,
(fpol_preinv ^ invert_fpol)
? TAS2770_TDM_CFG_REG0_FPOL_RSING
: TAS2770_TDM_CFG_REG0_FPOL_FALING);
if (ret < 0)
return ret;
return 0;
}
static int tas2770_set_dai_tdm_slot(struct snd_soc_dai *dai,
unsigned int tx_mask,
unsigned int rx_mask,
int slots, int slot_width)
{
struct snd_soc_component *component = dai->component;
int left_slot, right_slot;
int ret;
if (tx_mask == 0 || rx_mask != 0)
return -EINVAL;
left_slot = __ffs(tx_mask);
tx_mask &= ~(1 << left_slot);
if (tx_mask == 0) {
right_slot = left_slot;
} else {
right_slot = __ffs(tx_mask);
tx_mask &= ~(1 << right_slot);
}
if (tx_mask != 0 || left_slot >= slots || right_slot >= slots)
return -EINVAL;
ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG3,
TAS2770_TDM_CFG_REG3_30_MASK,
(left_slot << TAS2770_TDM_CFG_REG3_30_SHIFT));
if (ret < 0)
return ret;
ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG3,
TAS2770_TDM_CFG_REG3_RXS_MASK,
(right_slot << TAS2770_TDM_CFG_REG3_RXS_SHIFT));
if (ret < 0)
return ret;
switch (slot_width) {
case 16:
ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
TAS2770_TDM_CFG_REG2_RXS_MASK,
TAS2770_TDM_CFG_REG2_RXS_16BITS);
break;
case 24:
ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
TAS2770_TDM_CFG_REG2_RXS_MASK,
TAS2770_TDM_CFG_REG2_RXS_24BITS);
break;
case 32:
ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
TAS2770_TDM_CFG_REG2_RXS_MASK,
TAS2770_TDM_CFG_REG2_RXS_32BITS);
break;
case 0:
/* Do not change slot width */
ret = 0;
break;
default:
ret = -EINVAL;
}
if (ret < 0)
return ret;
return 0;
}
static const struct snd_soc_dai_ops tas2770_dai_ops = {
.mute_stream = tas2770_mute,
.hw_params = tas2770_hw_params,
.set_fmt = tas2770_set_fmt,
.set_tdm_slot = tas2770_set_dai_tdm_slot,
.no_capture_mute = 1,
};
#define TAS2770_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
#define TAS2770_RATES (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\
SNDRV_PCM_RATE_96000 |\
SNDRV_PCM_RATE_192000\
)
static struct snd_soc_dai_driver tas2770_dai_driver[] = {
{
.name = "tas2770 ASI1",
.id = 0,
.playback = {
.stream_name = "ASI1 Playback",
.channels_min = 1,
.channels_max = 2,
.rates = TAS2770_RATES,
.formats = TAS2770_FORMATS,
},
.capture = {
.stream_name = "ASI1 Capture",
.channels_min = 0,
.channels_max = 2,
.rates = TAS2770_RATES,
.formats = TAS2770_FORMATS,
},
.ops = &tas2770_dai_ops,
.symmetric_rate = 1,
},
};
static const struct regmap_config tas2770_i2c_regmap;
static int tas2770_codec_probe(struct snd_soc_component *component)
{
struct tas2770_priv *tas2770 =
snd_soc_component_get_drvdata(component);
tas2770->component = component;
if (tas2770->sdz_gpio) {
gpiod_set_value_cansleep(tas2770->sdz_gpio, 1);
usleep_range(1000, 2000);
}
tas2770_reset(tas2770);
regmap_reinit_cache(tas2770->regmap, &tas2770_i2c_regmap);
return 0;
}
static DECLARE_TLV_DB_SCALE(tas2770_digital_tlv, 1100, 50, 0);
static DECLARE_TLV_DB_SCALE(tas2770_playback_volume, -12750, 50, 0);
static const struct snd_kcontrol_new tas2770_snd_controls[] = {
SOC_SINGLE_TLV("Speaker Playback Volume", TAS2770_PLAY_CFG_REG2,
0, TAS2770_PLAY_CFG_REG2_VMAX, 1, tas2770_playback_volume),
SOC_SINGLE_TLV("Amp Gain Volume", TAS2770_PLAY_CFG_REG0, 0, 0x14, 0,
tas2770_digital_tlv),
};
static const struct snd_soc_component_driver soc_component_driver_tas2770 = {
.probe = tas2770_codec_probe,
.suspend = tas2770_codec_suspend,
.resume = tas2770_codec_resume,
.controls = tas2770_snd_controls,
.num_controls = ARRAY_SIZE(tas2770_snd_controls),
.dapm_widgets = tas2770_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(tas2770_dapm_widgets),
.dapm_routes = tas2770_audio_map,
.num_dapm_routes = ARRAY_SIZE(tas2770_audio_map),
.idle_bias_on = 1,
.endianness = 1,
};
static int tas2770_register_codec(struct tas2770_priv *tas2770)
{
return devm_snd_soc_register_component(tas2770->dev,
&soc_component_driver_tas2770,
tas2770_dai_driver, ARRAY_SIZE(tas2770_dai_driver));
}
static const struct reg_default tas2770_reg_defaults[] = {
{ TAS2770_PAGE, 0x00 },
{ TAS2770_SW_RST, 0x00 },
{ TAS2770_PWR_CTRL, 0x0e },
{ TAS2770_PLAY_CFG_REG0, 0x10 },
{ TAS2770_PLAY_CFG_REG1, 0x01 },
{ TAS2770_PLAY_CFG_REG2, 0x00 },
{ TAS2770_MSC_CFG_REG0, 0x07 },
{ TAS2770_TDM_CFG_REG1, 0x02 },
{ TAS2770_TDM_CFG_REG2, 0x0a },
{ TAS2770_TDM_CFG_REG3, 0x10 },
{ TAS2770_INT_MASK_REG0, 0xfc },
{ TAS2770_INT_MASK_REG1, 0xb1 },
{ TAS2770_INT_CFG, 0x05 },
{ TAS2770_MISC_IRQ, 0x81 },
{ TAS2770_CLK_CGF, 0x0c },
};
static bool tas2770_volatile(struct device *dev, unsigned int reg)
{
switch (reg) {
case TAS2770_PAGE: /* regmap implementation requires this */
case TAS2770_SW_RST: /* always clears after write */
case TAS2770_BO_PRV_REG0:/* has a self clearing bit */
case TAS2770_LVE_INT_REG0:
case TAS2770_LVE_INT_REG1:
case TAS2770_LAT_INT_REG0:/* Sticky interrupt flags */
case TAS2770_LAT_INT_REG1:/* Sticky interrupt flags */
case TAS2770_VBAT_MSB:
case TAS2770_VBAT_LSB:
case TAS2770_TEMP_MSB:
case TAS2770_TEMP_LSB:
return true;
}
return false;
}
static bool tas2770_writeable(struct device *dev, unsigned int reg)
{
switch (reg) {
case TAS2770_LVE_INT_REG0:
case TAS2770_LVE_INT_REG1:
case TAS2770_LAT_INT_REG0:
case TAS2770_LAT_INT_REG1:
case TAS2770_VBAT_MSB:
case TAS2770_VBAT_LSB:
case TAS2770_TEMP_MSB:
case TAS2770_TEMP_LSB:
case TAS2770_TDM_CLK_DETC:
case TAS2770_REV_AND_GPID:
return false;
}
return true;
}
static const struct regmap_range_cfg tas2770_regmap_ranges[] = {
{
.range_min = 0,
.range_max = 1 * 128,
.selector_reg = TAS2770_PAGE,
.selector_mask = 0xff,
.selector_shift = 0,
.window_start = 0,
.window_len = 128,
},
};
static const struct regmap_config tas2770_i2c_regmap = {
.reg_bits = 8,
.val_bits = 8,
.writeable_reg = tas2770_writeable,
.volatile_reg = tas2770_volatile,
.reg_defaults = tas2770_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(tas2770_reg_defaults),
.cache_type = REGCACHE_RBTREE,
.ranges = tas2770_regmap_ranges,
.num_ranges = ARRAY_SIZE(tas2770_regmap_ranges),
.max_register = 1 * 128,
};
static int tas2770_parse_dt(struct device *dev, struct tas2770_priv *tas2770)
{
int rc = 0;
rc = fwnode_property_read_u32(dev->fwnode, "ti,imon-slot-no",
&tas2770->i_sense_slot);
if (rc) {
dev_info(tas2770->dev, "Property %s is missing setting default slot\n",
"ti,imon-slot-no");
tas2770->i_sense_slot = 0;
}
rc = fwnode_property_read_u32(dev->fwnode, "ti,vmon-slot-no",
&tas2770->v_sense_slot);
if (rc) {
dev_info(tas2770->dev, "Property %s is missing setting default slot\n",
"ti,vmon-slot-no");
tas2770->v_sense_slot = 2;
}
tas2770->sdz_gpio = devm_gpiod_get_optional(dev, "shutdown", GPIOD_OUT_HIGH);
if (IS_ERR(tas2770->sdz_gpio)) {
if (PTR_ERR(tas2770->sdz_gpio) == -EPROBE_DEFER)
return -EPROBE_DEFER;
tas2770->sdz_gpio = NULL;
}
return 0;
}
static int tas2770_i2c_probe(struct i2c_client *client)
{
struct tas2770_priv *tas2770;
int result;
tas2770 = devm_kzalloc(&client->dev, sizeof(struct tas2770_priv),
GFP_KERNEL);
if (!tas2770)
return -ENOMEM;
tas2770->dev = &client->dev;
i2c_set_clientdata(client, tas2770);
dev_set_drvdata(&client->dev, tas2770);
tas2770->regmap = devm_regmap_init_i2c(client, &tas2770_i2c_regmap);
if (IS_ERR(tas2770->regmap)) {
result = PTR_ERR(tas2770->regmap);
dev_err(&client->dev, "Failed to allocate register map: %d\n",
result);
return result;
}
if (client->dev.of_node) {
result = tas2770_parse_dt(&client->dev, tas2770);
if (result) {
dev_err(tas2770->dev, "%s: Failed to parse devicetree\n",
__func__);
return result;
}
}
tas2770->reset_gpio = devm_gpiod_get_optional(tas2770->dev, "reset",
GPIOD_OUT_HIGH);
if (IS_ERR(tas2770->reset_gpio)) {
if (PTR_ERR(tas2770->reset_gpio) == -EPROBE_DEFER) {
tas2770->reset_gpio = NULL;
return -EPROBE_DEFER;
}
}
result = tas2770_register_codec(tas2770);
if (result)
dev_err(tas2770->dev, "Register codec failed.\n");
return result;
}
static const struct i2c_device_id tas2770_i2c_id[] = {
{ "tas2770"},
{ }
};
MODULE_DEVICE_TABLE(i2c, tas2770_i2c_id);
#if defined(CONFIG_OF)
static const struct of_device_id tas2770_of_match[] = {
{ .compatible = "ti,tas2770" },
{},
};
MODULE_DEVICE_TABLE(of, tas2770_of_match);
#endif
static struct i2c_driver tas2770_i2c_driver = {
.driver = {
.name = "tas2770",
.of_match_table = of_match_ptr(tas2770_of_match),
},
.probe = tas2770_i2c_probe,
.id_table = tas2770_i2c_id,
};
module_i2c_driver(tas2770_i2c_driver);
MODULE_AUTHOR("Shi Fu <[email protected]>");
MODULE_DESCRIPTION("TAS2770 I2C Smart Amplifier driver");
MODULE_LICENSE("GPL v2");
Codebase Browser
linux