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linux/sound/soc/codecs/cs35l34.c
Rob Herring 340d79a14d
ASoC: Explicitly include correct DT includes 
The DT of_device.h and of_platform.h date back to the separate
of_platform_bus_type before it was merged into the regular platform bus.
As part of that merge prepping Arm DT support 13 years ago, they
"temporarily" include each other. They also include platform_device.h
and of.h. As a result, there's a pretty much random mix of those include
files used throughout the tree. In order to detangle these headers and
replace the implicit includes with struct declarations, users need to
explicitly include the correct includes.

Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Reviewed-by: Claudiu Beznea <claudiu.beznea@tuxon.dev> # for at91
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20231006-dt-asoc-header-cleanups-v3-1-13a4f0f7fee6@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
2023-10-09 13:13:56 +01:00

1243 lines
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// SPDX-License-Identifier: GPL-2.0-only
/*
* cs35l34.c -- CS35l34 ALSA SoC audio driver
*
* Copyright 2016 Cirrus Logic, Inc.
*
* Author: Paul Handrigan <Paul.Handrigan@cirrus.com>
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>
#include <linux/regulator/machine.h>
#include <linux/pm_runtime.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/of_irq.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <sound/initval.h>
#include <sound/tlv.h>
#include <sound/cs35l34.h>
#include "cs35l34.h"
#include "cirrus_legacy.h"
#define PDN_DONE_ATTEMPTS 10
#define CS35L34_START_DELAY 50
struct cs35l34_private {
struct snd_soc_component *component;
struct cs35l34_platform_data pdata;
struct regmap *regmap;
struct regulator_bulk_data core_supplies[2];
int num_core_supplies;
int mclk_int;
bool tdm_mode;
struct gpio_desc *reset_gpio; /* Active-low reset GPIO */
};
static const struct reg_default cs35l34_reg[] = {
{CS35L34_PWRCTL1, 0x01},
{CS35L34_PWRCTL2, 0x19},
{CS35L34_PWRCTL3, 0x01},
{CS35L34_ADSP_CLK_CTL, 0x08},
{CS35L34_MCLK_CTL, 0x11},
{CS35L34_AMP_INP_DRV_CTL, 0x01},
{CS35L34_AMP_DIG_VOL_CTL, 0x12},
{CS35L34_AMP_DIG_VOL, 0x00},
{CS35L34_AMP_ANLG_GAIN_CTL, 0x0F},
{CS35L34_PROTECT_CTL, 0x06},
{CS35L34_AMP_KEEP_ALIVE_CTL, 0x04},
{CS35L34_BST_CVTR_V_CTL, 0x00},
{CS35L34_BST_PEAK_I, 0x10},
{CS35L34_BST_RAMP_CTL, 0x87},
{CS35L34_BST_CONV_COEF_1, 0x24},
{CS35L34_BST_CONV_COEF_2, 0x24},
{CS35L34_BST_CONV_SLOPE_COMP, 0x4E},
{CS35L34_BST_CONV_SW_FREQ, 0x08},
{CS35L34_CLASS_H_CTL, 0x0D},
{CS35L34_CLASS_H_HEADRM_CTL, 0x0D},
{CS35L34_CLASS_H_RELEASE_RATE, 0x08},
{CS35L34_CLASS_H_FET_DRIVE_CTL, 0x41},
{CS35L34_CLASS_H_STATUS, 0x05},
{CS35L34_VPBR_CTL, 0x0A},
{CS35L34_VPBR_VOL_CTL, 0x90},
{CS35L34_VPBR_TIMING_CTL, 0x6A},
{CS35L34_PRED_MAX_ATTEN_SPK_LOAD, 0x95},
{CS35L34_PRED_BROWNOUT_THRESH, 0x1C},
{CS35L34_PRED_BROWNOUT_VOL_CTL, 0x00},
{CS35L34_PRED_BROWNOUT_RATE_CTL, 0x10},
{CS35L34_PRED_WAIT_CTL, 0x10},
{CS35L34_PRED_ZVP_INIT_IMP_CTL, 0x08},
{CS35L34_PRED_MAN_SAFE_VPI_CTL, 0x80},
{CS35L34_VPBR_ATTEN_STATUS, 0x00},
{CS35L34_PRED_BRWNOUT_ATT_STATUS, 0x00},
{CS35L34_SPKR_MON_CTL, 0xC6},
{CS35L34_ADSP_I2S_CTL, 0x00},
{CS35L34_ADSP_TDM_CTL, 0x00},
{CS35L34_TDM_TX_CTL_1_VMON, 0x00},
{CS35L34_TDM_TX_CTL_2_IMON, 0x04},
{CS35L34_TDM_TX_CTL_3_VPMON, 0x03},
{CS35L34_TDM_TX_CTL_4_VBSTMON, 0x07},
{CS35L34_TDM_TX_CTL_5_FLAG1, 0x08},
{CS35L34_TDM_TX_CTL_6_FLAG2, 0x09},
{CS35L34_TDM_TX_SLOT_EN_1, 0x00},
{CS35L34_TDM_TX_SLOT_EN_2, 0x00},
{CS35L34_TDM_TX_SLOT_EN_3, 0x00},
{CS35L34_TDM_TX_SLOT_EN_4, 0x00},
{CS35L34_TDM_RX_CTL_1_AUDIN, 0x40},
{CS35L34_TDM_RX_CTL_3_ALIVE, 0x04},
{CS35L34_MULT_DEV_SYNCH1, 0x00},
{CS35L34_MULT_DEV_SYNCH2, 0x80},
{CS35L34_PROT_RELEASE_CTL, 0x00},
{CS35L34_DIAG_MODE_REG_LOCK, 0x00},
{CS35L34_DIAG_MODE_CTL_1, 0x00},
{CS35L34_DIAG_MODE_CTL_2, 0x00},
{CS35L34_INT_MASK_1, 0xFF},
{CS35L34_INT_MASK_2, 0xFF},
{CS35L34_INT_MASK_3, 0xFF},
{CS35L34_INT_MASK_4, 0xFF},
{CS35L34_INT_STATUS_1, 0x30},
{CS35L34_INT_STATUS_2, 0x05},
{CS35L34_INT_STATUS_3, 0x00},
{CS35L34_INT_STATUS_4, 0x00},
{CS35L34_OTP_TRIM_STATUS, 0x00},
};
static bool cs35l34_volatile_register(struct device *dev, unsigned int reg)
{
switch (reg) {
case CS35L34_DEVID_AB:
case CS35L34_DEVID_CD:
case CS35L34_DEVID_E:
case CS35L34_FAB_ID:
case CS35L34_REV_ID:
case CS35L34_INT_STATUS_1:
case CS35L34_INT_STATUS_2:
case CS35L34_INT_STATUS_3:
case CS35L34_INT_STATUS_4:
case CS35L34_CLASS_H_STATUS:
case CS35L34_VPBR_ATTEN_STATUS:
case CS35L34_OTP_TRIM_STATUS:
return true;
default:
return false;
}
}
static bool cs35l34_readable_register(struct device *dev, unsigned int reg)
{
switch (reg) {
case CS35L34_DEVID_AB:
case CS35L34_DEVID_CD:
case CS35L34_DEVID_E:
case CS35L34_FAB_ID:
case CS35L34_REV_ID:
case CS35L34_PWRCTL1:
case CS35L34_PWRCTL2:
case CS35L34_PWRCTL3:
case CS35L34_ADSP_CLK_CTL:
case CS35L34_MCLK_CTL:
case CS35L34_AMP_INP_DRV_CTL:
case CS35L34_AMP_DIG_VOL_CTL:
case CS35L34_AMP_DIG_VOL:
case CS35L34_AMP_ANLG_GAIN_CTL:
case CS35L34_PROTECT_CTL:
case CS35L34_AMP_KEEP_ALIVE_CTL:
case CS35L34_BST_CVTR_V_CTL:
case CS35L34_BST_PEAK_I:
case CS35L34_BST_RAMP_CTL:
case CS35L34_BST_CONV_COEF_1:
case CS35L34_BST_CONV_COEF_2:
case CS35L34_BST_CONV_SLOPE_COMP:
case CS35L34_BST_CONV_SW_FREQ:
case CS35L34_CLASS_H_CTL:
case CS35L34_CLASS_H_HEADRM_CTL:
case CS35L34_CLASS_H_RELEASE_RATE:
case CS35L34_CLASS_H_FET_DRIVE_CTL:
case CS35L34_CLASS_H_STATUS:
case CS35L34_VPBR_CTL:
case CS35L34_VPBR_VOL_CTL:
case CS35L34_VPBR_TIMING_CTL:
case CS35L34_PRED_MAX_ATTEN_SPK_LOAD:
case CS35L34_PRED_BROWNOUT_THRESH:
case CS35L34_PRED_BROWNOUT_VOL_CTL:
case CS35L34_PRED_BROWNOUT_RATE_CTL:
case CS35L34_PRED_WAIT_CTL:
case CS35L34_PRED_ZVP_INIT_IMP_CTL:
case CS35L34_PRED_MAN_SAFE_VPI_CTL:
case CS35L34_VPBR_ATTEN_STATUS:
case CS35L34_PRED_BRWNOUT_ATT_STATUS:
case CS35L34_SPKR_MON_CTL:
case CS35L34_ADSP_I2S_CTL:
case CS35L34_ADSP_TDM_CTL:
case CS35L34_TDM_TX_CTL_1_VMON:
case CS35L34_TDM_TX_CTL_2_IMON:
case CS35L34_TDM_TX_CTL_3_VPMON:
case CS35L34_TDM_TX_CTL_4_VBSTMON:
case CS35L34_TDM_TX_CTL_5_FLAG1:
case CS35L34_TDM_TX_CTL_6_FLAG2:
case CS35L34_TDM_TX_SLOT_EN_1:
case CS35L34_TDM_TX_SLOT_EN_2:
case CS35L34_TDM_TX_SLOT_EN_3:
case CS35L34_TDM_TX_SLOT_EN_4:
case CS35L34_TDM_RX_CTL_1_AUDIN:
case CS35L34_TDM_RX_CTL_3_ALIVE:
case CS35L34_MULT_DEV_SYNCH1:
case CS35L34_MULT_DEV_SYNCH2:
case CS35L34_PROT_RELEASE_CTL:
case CS35L34_DIAG_MODE_REG_LOCK:
case CS35L34_DIAG_MODE_CTL_1:
case CS35L34_DIAG_MODE_CTL_2:
case CS35L34_INT_MASK_1:
case CS35L34_INT_MASK_2:
case CS35L34_INT_MASK_3:
case CS35L34_INT_MASK_4:
case CS35L34_INT_STATUS_1:
case CS35L34_INT_STATUS_2:
case CS35L34_INT_STATUS_3:
case CS35L34_INT_STATUS_4:
case CS35L34_OTP_TRIM_STATUS:
return true;
default:
return false;
}
}
static bool cs35l34_precious_register(struct device *dev, unsigned int reg)
{
switch (reg) {
case CS35L34_INT_STATUS_1:
case CS35L34_INT_STATUS_2:
case CS35L34_INT_STATUS_3:
case CS35L34_INT_STATUS_4:
return true;
default:
return false;
}
}
static int cs35l34_sdin_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 cs35l34_private *priv = snd_soc_component_get_drvdata(component);
int ret;
switch (event) {
case SND_SOC_DAPM_PRE_PMU:
if (priv->tdm_mode)
regmap_update_bits(priv->regmap, CS35L34_PWRCTL3,
CS35L34_PDN_TDM, 0x00);
ret = regmap_update_bits(priv->regmap, CS35L34_PWRCTL1,
CS35L34_PDN_ALL, 0);
if (ret < 0) {
dev_err(component->dev, "Cannot set Power bits %d\n", ret);
return ret;
}
usleep_range(5000, 5100);
break;
case SND_SOC_DAPM_POST_PMD:
if (priv->tdm_mode) {
regmap_update_bits(priv->regmap, CS35L34_PWRCTL3,
CS35L34_PDN_TDM, CS35L34_PDN_TDM);
}
ret = regmap_update_bits(priv->regmap, CS35L34_PWRCTL1,
CS35L34_PDN_ALL, CS35L34_PDN_ALL);
break;
default:
pr_err("Invalid event = 0x%x\n", event);
}
return 0;
}
static int cs35l34_set_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;
struct cs35l34_private *priv = snd_soc_component_get_drvdata(component);
unsigned int reg, bit_pos;
int slot, slot_num;
if (slot_width != 8)
return -EINVAL;
priv->tdm_mode = true;
/* scan rx_mask for aud slot */
slot = ffs(rx_mask) - 1;
if (slot >= 0)
snd_soc_component_update_bits(component, CS35L34_TDM_RX_CTL_1_AUDIN,
CS35L34_X_LOC, slot);
/* scan tx_mask: vmon(2 slots); imon (2 slots); vpmon (1 slot)
* vbstmon (1 slot)
*/
slot = ffs(tx_mask) - 1;
slot_num = 0;
/* disable vpmon/vbstmon: enable later if set in tx_mask */
snd_soc_component_update_bits(component, CS35L34_TDM_TX_CTL_3_VPMON,
CS35L34_X_STATE | CS35L34_X_LOC,
CS35L34_X_STATE | CS35L34_X_LOC);
snd_soc_component_update_bits(component, CS35L34_TDM_TX_CTL_4_VBSTMON,
CS35L34_X_STATE | CS35L34_X_LOC,
CS35L34_X_STATE | CS35L34_X_LOC);
/* disconnect {vp,vbst}_mon routes: eanble later if set in tx_mask*/
while (slot >= 0) {
/* configure VMON_TX_LOC */
if (slot_num == 0)
snd_soc_component_update_bits(component, CS35L34_TDM_TX_CTL_1_VMON,
CS35L34_X_STATE | CS35L34_X_LOC, slot);
/* configure IMON_TX_LOC */
if (slot_num == 4) {
snd_soc_component_update_bits(component, CS35L34_TDM_TX_CTL_2_IMON,
CS35L34_X_STATE | CS35L34_X_LOC, slot);
}
/* configure VPMON_TX_LOC */
if (slot_num == 3) {
snd_soc_component_update_bits(component, CS35L34_TDM_TX_CTL_3_VPMON,
CS35L34_X_STATE | CS35L34_X_LOC, slot);
}
/* configure VBSTMON_TX_LOC */
if (slot_num == 7) {
snd_soc_component_update_bits(component,
CS35L34_TDM_TX_CTL_4_VBSTMON,
CS35L34_X_STATE | CS35L34_X_LOC, slot);
}
/* Enable the relevant tx slot */
reg = CS35L34_TDM_TX_SLOT_EN_4 - (slot/8);
bit_pos = slot - ((slot / 8) * (8));
snd_soc_component_update_bits(component, reg,
1 << bit_pos, 1 << bit_pos);
tx_mask &= ~(1 << slot);
slot = ffs(tx_mask) - 1;
slot_num++;
}
return 0;
}
static int cs35l34_main_amp_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 cs35l34_private *priv = snd_soc_component_get_drvdata(component);
switch (event) {
case SND_SOC_DAPM_POST_PMU:
regmap_update_bits(priv->regmap, CS35L34_BST_CVTR_V_CTL,
CS35L34_BST_CVTL_MASK, priv->pdata.boost_vtge);
usleep_range(5000, 5100);
regmap_update_bits(priv->regmap, CS35L34_PROTECT_CTL,
CS35L34_MUTE, 0);
break;
case SND_SOC_DAPM_POST_PMD:
regmap_update_bits(priv->regmap, CS35L34_BST_CVTR_V_CTL,
CS35L34_BST_CVTL_MASK, 0);
regmap_update_bits(priv->regmap, CS35L34_PROTECT_CTL,
CS35L34_MUTE, CS35L34_MUTE);
usleep_range(5000, 5100);
break;
default:
pr_err("Invalid event = 0x%x\n", event);
}
return 0;
}
static DECLARE_TLV_DB_SCALE(dig_vol_tlv, -10200, 50, 0);
static DECLARE_TLV_DB_SCALE(amp_gain_tlv, 300, 100, 0);
static const struct snd_kcontrol_new cs35l34_snd_controls[] = {
SOC_SINGLE_SX_TLV("Digital Volume", CS35L34_AMP_DIG_VOL,
0, 0x34, 0xE4, dig_vol_tlv),
SOC_SINGLE_TLV("Amp Gain Volume", CS35L34_AMP_ANLG_GAIN_CTL,
0, 0xF, 0, amp_gain_tlv),
};
static int cs35l34_mclk_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 cs35l34_private *priv = snd_soc_component_get_drvdata(component);
int ret, i;
unsigned int reg;
switch (event) {
case SND_SOC_DAPM_PRE_PMD:
ret = regmap_read(priv->regmap, CS35L34_AMP_DIG_VOL_CTL,
&reg);
if (ret != 0) {
pr_err("%s regmap read failure %d\n", __func__, ret);
return ret;
}
if (reg & CS35L34_AMP_DIGSFT)
msleep(40);
else
usleep_range(2000, 2100);
for (i = 0; i < PDN_DONE_ATTEMPTS; i++) {
ret = regmap_read(priv->regmap, CS35L34_INT_STATUS_2,
&reg);
if (ret != 0) {
pr_err("%s regmap read failure %d\n",
__func__, ret);
return ret;
}
if (reg & CS35L34_PDN_DONE)
break;
usleep_range(5000, 5100);
}
if (i == PDN_DONE_ATTEMPTS)
pr_err("%s Device did not power down properly\n",
__func__);
break;
default:
pr_err("Invalid event = 0x%x\n", event);
break;
}
return 0;
}
static const struct snd_soc_dapm_widget cs35l34_dapm_widgets[] = {
SND_SOC_DAPM_AIF_IN_E("SDIN", NULL, 0, CS35L34_PWRCTL3,
1, 1, cs35l34_sdin_event,
SND_SOC_DAPM_PRE_PMU |
SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_AIF_OUT("SDOUT", NULL, 0, CS35L34_PWRCTL3, 2, 1),
SND_SOC_DAPM_SUPPLY("EXTCLK", CS35L34_PWRCTL3, 7, 1,
cs35l34_mclk_event, SND_SOC_DAPM_PRE_PMD),
SND_SOC_DAPM_OUTPUT("SPK"),
SND_SOC_DAPM_INPUT("VP"),
SND_SOC_DAPM_INPUT("VPST"),
SND_SOC_DAPM_INPUT("ISENSE"),
SND_SOC_DAPM_INPUT("VSENSE"),
SND_SOC_DAPM_ADC("VMON ADC", NULL, CS35L34_PWRCTL2, 7, 1),
SND_SOC_DAPM_ADC("IMON ADC", NULL, CS35L34_PWRCTL2, 6, 1),
SND_SOC_DAPM_ADC("VPMON ADC", NULL, CS35L34_PWRCTL3, 3, 1),
SND_SOC_DAPM_ADC("VBSTMON ADC", NULL, CS35L34_PWRCTL3, 4, 1),
SND_SOC_DAPM_ADC("CLASS H", NULL, CS35L34_PWRCTL2, 5, 1),
SND_SOC_DAPM_ADC("BOOST", NULL, CS35L34_PWRCTL2, 2, 1),
SND_SOC_DAPM_OUT_DRV_E("Main AMP", CS35L34_PWRCTL2, 0, 1, NULL, 0,
cs35l34_main_amp_event, SND_SOC_DAPM_POST_PMU |
SND_SOC_DAPM_POST_PMD),
};
static const struct snd_soc_dapm_route cs35l34_audio_map[] = {
{"SDIN", NULL, "AMP Playback"},
{"BOOST", NULL, "SDIN"},
{"CLASS H", NULL, "BOOST"},
{"Main AMP", NULL, "CLASS H"},
{"SPK", NULL, "Main AMP"},
{"VPMON ADC", NULL, "CLASS H"},
{"VBSTMON ADC", NULL, "CLASS H"},
{"SPK", NULL, "VPMON ADC"},
{"SPK", NULL, "VBSTMON ADC"},
{"IMON ADC", NULL, "ISENSE"},
{"VMON ADC", NULL, "VSENSE"},
{"SDOUT", NULL, "IMON ADC"},
{"SDOUT", NULL, "VMON ADC"},
{"AMP Capture", NULL, "SDOUT"},
{"SDIN", NULL, "EXTCLK"},
{"SDOUT", NULL, "EXTCLK"},
};
struct cs35l34_mclk_div {
int mclk;
int srate;
u8 adsp_rate;
};
static struct cs35l34_mclk_div cs35l34_mclk_coeffs[] = {
/* MCLK, Sample Rate, adsp_rate */
{5644800, 11025, 0x1},
{5644800, 22050, 0x4},
{5644800, 44100, 0x7},
{6000000, 8000, 0x0},
{6000000, 11025, 0x1},
{6000000, 12000, 0x2},
{6000000, 16000, 0x3},
{6000000, 22050, 0x4},
{6000000, 24000, 0x5},
{6000000, 32000, 0x6},
{6000000, 44100, 0x7},
{6000000, 48000, 0x8},
{6144000, 8000, 0x0},
{6144000, 11025, 0x1},
{6144000, 12000, 0x2},
{6144000, 16000, 0x3},
{6144000, 22050, 0x4},
{6144000, 24000, 0x5},
{6144000, 32000, 0x6},
{6144000, 44100, 0x7},
{6144000, 48000, 0x8},
};
static int cs35l34_get_mclk_coeff(int mclk, int srate)
{
int i;
for (i = 0; i < ARRAY_SIZE(cs35l34_mclk_coeffs); i++) {
if (cs35l34_mclk_coeffs[i].mclk == mclk &&
cs35l34_mclk_coeffs[i].srate == srate)
return i;
}
return -EINVAL;
}
static int cs35l34_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
{
struct snd_soc_component *component = codec_dai->component;
struct cs35l34_private *priv = snd_soc_component_get_drvdata(component);
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
regmap_update_bits(priv->regmap, CS35L34_ADSP_CLK_CTL,
0x80, 0x80);
break;
case SND_SOC_DAIFMT_CBS_CFS:
regmap_update_bits(priv->regmap, CS35L34_ADSP_CLK_CTL,
0x80, 0x00);
break;
default:
return -EINVAL;
}
return 0;
}
static int cs35l34_pcm_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 cs35l34_private *priv = snd_soc_component_get_drvdata(component);
int srate = params_rate(params);
int ret;
int coeff = cs35l34_get_mclk_coeff(priv->mclk_int, srate);
if (coeff < 0) {
dev_err(component->dev, "ERROR: Invalid mclk %d and/or srate %d\n",
priv->mclk_int, srate);
return coeff;
}
ret = regmap_update_bits(priv->regmap, CS35L34_ADSP_CLK_CTL,
CS35L34_ADSP_RATE, cs35l34_mclk_coeffs[coeff].adsp_rate);
if (ret != 0)
dev_err(component->dev, "Failed to set clock state %d\n", ret);
return ret;
}
static const unsigned int cs35l34_src_rates[] = {
8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000
};
static const struct snd_pcm_hw_constraint_list cs35l34_constraints = {
.count = ARRAY_SIZE(cs35l34_src_rates),
.list = cs35l34_src_rates,
};
static int cs35l34_pcm_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
snd_pcm_hw_constraint_list(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_RATE, &cs35l34_constraints);
return 0;
}
static int cs35l34_set_tristate(struct snd_soc_dai *dai, int tristate)
{
struct snd_soc_component *component = dai->component;
if (tristate)
snd_soc_component_update_bits(component, CS35L34_PWRCTL3,
CS35L34_PDN_SDOUT, CS35L34_PDN_SDOUT);
else
snd_soc_component_update_bits(component, CS35L34_PWRCTL3,
CS35L34_PDN_SDOUT, 0);
return 0;
}
static int cs35l34_dai_set_sysclk(struct snd_soc_dai *dai,
int clk_id, unsigned int freq, int dir)
{
struct snd_soc_component *component = dai->component;
struct cs35l34_private *cs35l34 = snd_soc_component_get_drvdata(component);
unsigned int value;
switch (freq) {
case CS35L34_MCLK_5644:
value = CS35L34_MCLK_RATE_5P6448;
cs35l34->mclk_int = freq;
break;
case CS35L34_MCLK_6:
value = CS35L34_MCLK_RATE_6P0000;
cs35l34->mclk_int = freq;
break;
case CS35L34_MCLK_6144:
value = CS35L34_MCLK_RATE_6P1440;
cs35l34->mclk_int = freq;
break;
case CS35L34_MCLK_11289:
value = CS35L34_MCLK_DIV | CS35L34_MCLK_RATE_5P6448;
cs35l34->mclk_int = freq / 2;
break;
case CS35L34_MCLK_12:
value = CS35L34_MCLK_DIV | CS35L34_MCLK_RATE_6P0000;
cs35l34->mclk_int = freq / 2;
break;
case CS35L34_MCLK_12288:
value = CS35L34_MCLK_DIV | CS35L34_MCLK_RATE_6P1440;
cs35l34->mclk_int = freq / 2;
break;
default:
dev_err(component->dev, "ERROR: Invalid Frequency %d\n", freq);
cs35l34->mclk_int = 0;
return -EINVAL;
}
regmap_update_bits(cs35l34->regmap, CS35L34_MCLK_CTL,
CS35L34_MCLK_DIV | CS35L34_MCLK_RATE_MASK, value);
return 0;
}
static const struct snd_soc_dai_ops cs35l34_ops = {
.startup = cs35l34_pcm_startup,
.set_tristate = cs35l34_set_tristate,
.set_fmt = cs35l34_set_dai_fmt,
.hw_params = cs35l34_pcm_hw_params,
.set_sysclk = cs35l34_dai_set_sysclk,
.set_tdm_slot = cs35l34_set_tdm_slot,
};
static struct snd_soc_dai_driver cs35l34_dai = {
.name = "cs35l34",
.id = 0,
.playback = {
.stream_name = "AMP Playback",
.channels_min = 1,
.channels_max = 8,
.rates = CS35L34_RATES,
.formats = CS35L34_FORMATS,
},
.capture = {
.stream_name = "AMP Capture",
.channels_min = 1,
.channels_max = 8,
.rates = CS35L34_RATES,
.formats = CS35L34_FORMATS,
},
.ops = &cs35l34_ops,
.symmetric_rate = 1,
};
static int cs35l34_boost_inductor(struct cs35l34_private *cs35l34,
unsigned int inductor)
{
struct snd_soc_component *component = cs35l34->component;
switch (inductor) {
case 1000: /* 1 uH */
regmap_write(cs35l34->regmap, CS35L34_BST_CONV_COEF_1, 0x24);
regmap_write(cs35l34->regmap, CS35L34_BST_CONV_COEF_2, 0x24);
regmap_write(cs35l34->regmap, CS35L34_BST_CONV_SLOPE_COMP,
0x4E);
regmap_write(cs35l34->regmap, CS35L34_BST_CONV_SW_FREQ, 0);
break;
case 1200: /* 1.2 uH */
regmap_write(cs35l34->regmap, CS35L34_BST_CONV_COEF_1, 0x20);
regmap_write(cs35l34->regmap, CS35L34_BST_CONV_COEF_2, 0x20);
regmap_write(cs35l34->regmap, CS35L34_BST_CONV_SLOPE_COMP,
0x47);
regmap_write(cs35l34->regmap, CS35L34_BST_CONV_SW_FREQ, 1);
break;
case 1500: /* 1.5uH */
regmap_write(cs35l34->regmap, CS35L34_BST_CONV_COEF_1, 0x20);
regmap_write(cs35l34->regmap, CS35L34_BST_CONV_COEF_2, 0x20);
regmap_write(cs35l34->regmap, CS35L34_BST_CONV_SLOPE_COMP,
0x3C);
regmap_write(cs35l34->regmap, CS35L34_BST_CONV_SW_FREQ, 2);
break;
case 2200: /* 2.2uH */
regmap_write(cs35l34->regmap, CS35L34_BST_CONV_COEF_1, 0x19);
regmap_write(cs35l34->regmap, CS35L34_BST_CONV_COEF_2, 0x25);
regmap_write(cs35l34->regmap, CS35L34_BST_CONV_SLOPE_COMP,
0x23);
regmap_write(cs35l34->regmap, CS35L34_BST_CONV_SW_FREQ, 3);
break;
default:
dev_err(component->dev, "%s Invalid Inductor Value %d uH\n",
__func__, inductor);
return -EINVAL;
}
return 0;
}
static int cs35l34_probe(struct snd_soc_component *component)
{
int ret = 0;
struct cs35l34_private *cs35l34 = snd_soc_component_get_drvdata(component);
pm_runtime_get_sync(component->dev);
/* Set over temperature warning attenuation to 6 dB */
regmap_update_bits(cs35l34->regmap, CS35L34_PROTECT_CTL,
CS35L34_OTW_ATTN_MASK, 0x8);
/* Set Power control registers 2 and 3 to have everything
* powered down at initialization
*/
regmap_write(cs35l34->regmap, CS35L34_PWRCTL2, 0xFD);
regmap_write(cs35l34->regmap, CS35L34_PWRCTL3, 0x1F);
/* Set mute bit at startup */
regmap_update_bits(cs35l34->regmap, CS35L34_PROTECT_CTL,
CS35L34_MUTE, CS35L34_MUTE);
/* Set Platform Data */
if (cs35l34->pdata.boost_peak)
regmap_update_bits(cs35l34->regmap, CS35L34_BST_PEAK_I,
CS35L34_BST_PEAK_MASK,
cs35l34->pdata.boost_peak);
if (cs35l34->pdata.gain_zc_disable)
regmap_update_bits(cs35l34->regmap, CS35L34_PROTECT_CTL,
CS35L34_GAIN_ZC_MASK, 0);
else
regmap_update_bits(cs35l34->regmap, CS35L34_PROTECT_CTL,
CS35L34_GAIN_ZC_MASK, CS35L34_GAIN_ZC_MASK);
if (cs35l34->pdata.aif_half_drv)
regmap_update_bits(cs35l34->regmap, CS35L34_ADSP_CLK_CTL,
CS35L34_ADSP_DRIVE, 0);
if (cs35l34->pdata.digsft_disable)
regmap_update_bits(cs35l34->regmap, CS35L34_AMP_DIG_VOL_CTL,
CS35L34_AMP_DIGSFT, 0);
if (cs35l34->pdata.amp_inv)
regmap_update_bits(cs35l34->regmap, CS35L34_AMP_DIG_VOL_CTL,
CS35L34_INV, CS35L34_INV);
if (cs35l34->pdata.boost_ind)
ret = cs35l34_boost_inductor(cs35l34, cs35l34->pdata.boost_ind);
if (cs35l34->pdata.i2s_sdinloc)
regmap_update_bits(cs35l34->regmap, CS35L34_ADSP_I2S_CTL,
CS35L34_I2S_LOC_MASK,
cs35l34->pdata.i2s_sdinloc << CS35L34_I2S_LOC_SHIFT);
if (cs35l34->pdata.tdm_rising_edge)
regmap_update_bits(cs35l34->regmap, CS35L34_ADSP_TDM_CTL,
1, 1);
pm_runtime_put_sync(component->dev);
return ret;
}
static const struct snd_soc_component_driver soc_component_dev_cs35l34 = {
.probe = cs35l34_probe,
.dapm_widgets = cs35l34_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(cs35l34_dapm_widgets),
.dapm_routes = cs35l34_audio_map,
.num_dapm_routes = ARRAY_SIZE(cs35l34_audio_map),
.controls = cs35l34_snd_controls,
.num_controls = ARRAY_SIZE(cs35l34_snd_controls),
.idle_bias_on = 1,
.use_pmdown_time = 1,
.endianness = 1,
};
static struct regmap_config cs35l34_regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = CS35L34_MAX_REGISTER,
.reg_defaults = cs35l34_reg,
.num_reg_defaults = ARRAY_SIZE(cs35l34_reg),
.volatile_reg = cs35l34_volatile_register,
.readable_reg = cs35l34_readable_register,
.precious_reg = cs35l34_precious_register,
.cache_type = REGCACHE_MAPLE,
.use_single_read = true,
.use_single_write = true,
};
static int cs35l34_handle_of_data(struct i2c_client *i2c_client,
struct cs35l34_platform_data *pdata)
{
struct device_node *np = i2c_client->dev.of_node;
unsigned int val;
if (of_property_read_u32(np, "cirrus,boost-vtge-millivolt",
&val) >= 0) {
/* Boost Voltage has a maximum of 8V */
if (val > 8000 || (val < 3300 && val > 0)) {
dev_err(&i2c_client->dev,
"Invalid Boost Voltage %d mV\n", val);
return -EINVAL;
}
if (val == 0)
pdata->boost_vtge = 0; /* Use VP */
else
pdata->boost_vtge = ((val - 3300)/100) + 1;
} else {
dev_warn(&i2c_client->dev,
"Boost Voltage not specified. Using VP\n");
}
if (of_property_read_u32(np, "cirrus,boost-ind-nanohenry", &val) >= 0) {
pdata->boost_ind = val;
} else {
dev_err(&i2c_client->dev, "Inductor not specified.\n");
return -EINVAL;
}
if (of_property_read_u32(np, "cirrus,boost-peak-milliamp", &val) >= 0) {
if (val > 3840 || val < 1200) {
dev_err(&i2c_client->dev,
"Invalid Boost Peak Current %d mA\n", val);
return -EINVAL;
}
pdata->boost_peak = ((val - 1200)/80) + 1;
}
pdata->aif_half_drv = of_property_read_bool(np,
"cirrus,aif-half-drv");
pdata->digsft_disable = of_property_read_bool(np,
"cirrus,digsft-disable");
pdata->gain_zc_disable = of_property_read_bool(np,
"cirrus,gain-zc-disable");
pdata->amp_inv = of_property_read_bool(np, "cirrus,amp-inv");
if (of_property_read_u32(np, "cirrus,i2s-sdinloc", &val) >= 0)
pdata->i2s_sdinloc = val;
if (of_property_read_u32(np, "cirrus,tdm-rising-edge", &val) >= 0)
pdata->tdm_rising_edge = val;
return 0;
}
static irqreturn_t cs35l34_irq_thread(int irq, void *data)
{
struct cs35l34_private *cs35l34 = data;
struct snd_soc_component *component = cs35l34->component;
unsigned int sticky1, sticky2, sticky3, sticky4;
unsigned int mask1, mask2, mask3, mask4, current1;
/* ack the irq by reading all status registers */
regmap_read(cs35l34->regmap, CS35L34_INT_STATUS_4, &sticky4);
regmap_read(cs35l34->regmap, CS35L34_INT_STATUS_3, &sticky3);
regmap_read(cs35l34->regmap, CS35L34_INT_STATUS_2, &sticky2);
regmap_read(cs35l34->regmap, CS35L34_INT_STATUS_1, &sticky1);
regmap_read(cs35l34->regmap, CS35L34_INT_MASK_4, &mask4);
regmap_read(cs35l34->regmap, CS35L34_INT_MASK_3, &mask3);
regmap_read(cs35l34->regmap, CS35L34_INT_MASK_2, &mask2);
regmap_read(cs35l34->regmap, CS35L34_INT_MASK_1, &mask1);
if (!(sticky1 & ~mask1) && !(sticky2 & ~mask2) && !(sticky3 & ~mask3)
&& !(sticky4 & ~mask4))
return IRQ_NONE;
regmap_read(cs35l34->regmap, CS35L34_INT_STATUS_1, &current1);
if (sticky1 & CS35L34_CAL_ERR) {
dev_err(component->dev, "Cal error\n");
/* error is no longer asserted; safe to reset */
if (!(current1 & CS35L34_CAL_ERR)) {
dev_dbg(component->dev, "Cal error release\n");
regmap_update_bits(cs35l34->regmap,
CS35L34_PROT_RELEASE_CTL,
CS35L34_CAL_ERR_RLS, 0);
regmap_update_bits(cs35l34->regmap,
CS35L34_PROT_RELEASE_CTL,
CS35L34_CAL_ERR_RLS,
CS35L34_CAL_ERR_RLS);
regmap_update_bits(cs35l34->regmap,
CS35L34_PROT_RELEASE_CTL,
CS35L34_CAL_ERR_RLS, 0);
/* note: amp will re-calibrate on next resume */
}
}
if (sticky1 & CS35L34_ALIVE_ERR)
dev_err(component->dev, "Alive error\n");
if (sticky1 & CS35L34_AMP_SHORT) {
dev_crit(component->dev, "Amp short error\n");
/* error is no longer asserted; safe to reset */
if (!(current1 & CS35L34_AMP_SHORT)) {
dev_dbg(component->dev,
"Amp short error release\n");
regmap_update_bits(cs35l34->regmap,
CS35L34_PROT_RELEASE_CTL,
CS35L34_SHORT_RLS, 0);
regmap_update_bits(cs35l34->regmap,
CS35L34_PROT_RELEASE_CTL,
CS35L34_SHORT_RLS,
CS35L34_SHORT_RLS);
regmap_update_bits(cs35l34->regmap,
CS35L34_PROT_RELEASE_CTL,
CS35L34_SHORT_RLS, 0);
}
}
if (sticky1 & CS35L34_OTW) {
dev_crit(component->dev, "Over temperature warning\n");
/* error is no longer asserted; safe to reset */
if (!(current1 & CS35L34_OTW)) {
dev_dbg(component->dev,
"Over temperature warning release\n");
regmap_update_bits(cs35l34->regmap,
CS35L34_PROT_RELEASE_CTL,
CS35L34_OTW_RLS, 0);
regmap_update_bits(cs35l34->regmap,
CS35L34_PROT_RELEASE_CTL,
CS35L34_OTW_RLS,
CS35L34_OTW_RLS);
regmap_update_bits(cs35l34->regmap,
CS35L34_PROT_RELEASE_CTL,
CS35L34_OTW_RLS, 0);
}
}
if (sticky1 & CS35L34_OTE) {
dev_crit(component->dev, "Over temperature error\n");
/* error is no longer asserted; safe to reset */
if (!(current1 & CS35L34_OTE)) {
dev_dbg(component->dev,
"Over temperature error release\n");
regmap_update_bits(cs35l34->regmap,
CS35L34_PROT_RELEASE_CTL,
CS35L34_OTE_RLS, 0);
regmap_update_bits(cs35l34->regmap,
CS35L34_PROT_RELEASE_CTL,
CS35L34_OTE_RLS,
CS35L34_OTE_RLS);
regmap_update_bits(cs35l34->regmap,
CS35L34_PROT_RELEASE_CTL,
CS35L34_OTE_RLS, 0);
}
}
if (sticky3 & CS35L34_BST_HIGH) {
dev_crit(component->dev, "VBST too high error; powering off!\n");
regmap_update_bits(cs35l34->regmap, CS35L34_PWRCTL2,
CS35L34_PDN_AMP, CS35L34_PDN_AMP);
regmap_update_bits(cs35l34->regmap, CS35L34_PWRCTL1,
CS35L34_PDN_ALL, CS35L34_PDN_ALL);
}
if (sticky3 & CS35L34_LBST_SHORT) {
dev_crit(component->dev, "LBST short error; powering off!\n");
regmap_update_bits(cs35l34->regmap, CS35L34_PWRCTL2,
CS35L34_PDN_AMP, CS35L34_PDN_AMP);
regmap_update_bits(cs35l34->regmap, CS35L34_PWRCTL1,
CS35L34_PDN_ALL, CS35L34_PDN_ALL);
}
return IRQ_HANDLED;
}
static const char * const cs35l34_core_supplies[] = {
"VA",
"VP",
};
static int cs35l34_i2c_probe(struct i2c_client *i2c_client)
{
struct cs35l34_private *cs35l34;
struct cs35l34_platform_data *pdata =
dev_get_platdata(&i2c_client->dev);
int i, devid;
int ret;
unsigned int reg;
cs35l34 = devm_kzalloc(&i2c_client->dev, sizeof(*cs35l34), GFP_KERNEL);
if (!cs35l34)
return -ENOMEM;
i2c_set_clientdata(i2c_client, cs35l34);
cs35l34->regmap = devm_regmap_init_i2c(i2c_client, &cs35l34_regmap);
if (IS_ERR(cs35l34->regmap)) {
ret = PTR_ERR(cs35l34->regmap);
dev_err(&i2c_client->dev, "regmap_init() failed: %d\n", ret);
return ret;
}
cs35l34->num_core_supplies = ARRAY_SIZE(cs35l34_core_supplies);
for (i = 0; i < ARRAY_SIZE(cs35l34_core_supplies); i++)
cs35l34->core_supplies[i].supply = cs35l34_core_supplies[i];
ret = devm_regulator_bulk_get(&i2c_client->dev,
cs35l34->num_core_supplies,
cs35l34->core_supplies);
if (ret != 0) {
dev_err(&i2c_client->dev,
"Failed to request core supplies %d\n", ret);
return ret;
}
ret = regulator_bulk_enable(cs35l34->num_core_supplies,
cs35l34->core_supplies);
if (ret != 0) {
dev_err(&i2c_client->dev,
"Failed to enable core supplies: %d\n", ret);
return ret;
}
if (pdata) {
cs35l34->pdata = *pdata;
} else {
pdata = devm_kzalloc(&i2c_client->dev, sizeof(*pdata),
GFP_KERNEL);
if (!pdata) {
ret = -ENOMEM;
goto err_regulator;
}
if (i2c_client->dev.of_node) {
ret = cs35l34_handle_of_data(i2c_client, pdata);
if (ret != 0)
goto err_regulator;
}
cs35l34->pdata = *pdata;
}
ret = devm_request_threaded_irq(&i2c_client->dev, i2c_client->irq, NULL,
cs35l34_irq_thread, IRQF_ONESHOT | IRQF_TRIGGER_LOW,
"cs35l34", cs35l34);
if (ret != 0)
dev_err(&i2c_client->dev, "Failed to request IRQ: %d\n", ret);
cs35l34->reset_gpio = devm_gpiod_get_optional(&i2c_client->dev,
"reset-gpios", GPIOD_OUT_LOW);
if (IS_ERR(cs35l34->reset_gpio)) {
ret = PTR_ERR(cs35l34->reset_gpio);
goto err_regulator;
}
gpiod_set_value_cansleep(cs35l34->reset_gpio, 1);
msleep(CS35L34_START_DELAY);
devid = cirrus_read_device_id(cs35l34->regmap, CS35L34_DEVID_AB);
if (devid < 0) {
ret = devid;
dev_err(&i2c_client->dev, "Failed to read device ID: %d\n", ret);
goto err_reset;
}
if (devid != CS35L34_CHIP_ID) {
dev_err(&i2c_client->dev,
"CS35l34 Device ID (%X). Expected ID %X\n",
devid, CS35L34_CHIP_ID);
ret = -ENODEV;
goto err_reset;
}
ret = regmap_read(cs35l34->regmap, CS35L34_REV_ID, &reg);
if (ret < 0) {
dev_err(&i2c_client->dev, "Get Revision ID failed\n");
goto err_reset;
}
dev_info(&i2c_client->dev,
"Cirrus Logic CS35l34 (%x), Revision: %02X\n", devid,
reg & 0xFF);
/* Unmask critical interrupts */
regmap_update_bits(cs35l34->regmap, CS35L34_INT_MASK_1,
CS35L34_M_CAL_ERR | CS35L34_M_ALIVE_ERR |
CS35L34_M_AMP_SHORT | CS35L34_M_OTW |
CS35L34_M_OTE, 0);
regmap_update_bits(cs35l34->regmap, CS35L34_INT_MASK_3,
CS35L34_M_BST_HIGH | CS35L34_M_LBST_SHORT, 0);
pm_runtime_set_autosuspend_delay(&i2c_client->dev, 100);
pm_runtime_use_autosuspend(&i2c_client->dev);
pm_runtime_set_active(&i2c_client->dev);
pm_runtime_enable(&i2c_client->dev);
ret = devm_snd_soc_register_component(&i2c_client->dev,
&soc_component_dev_cs35l34, &cs35l34_dai, 1);
if (ret < 0) {
dev_err(&i2c_client->dev,
"%s: Register component failed\n", __func__);
goto err_reset;
}
return 0;
err_reset:
gpiod_set_value_cansleep(cs35l34->reset_gpio, 0);
err_regulator:
regulator_bulk_disable(cs35l34->num_core_supplies,
cs35l34->core_supplies);
return ret;
}
static void cs35l34_i2c_remove(struct i2c_client *client)
{
struct cs35l34_private *cs35l34 = i2c_get_clientdata(client);
gpiod_set_value_cansleep(cs35l34->reset_gpio, 0);
pm_runtime_disable(&client->dev);
regulator_bulk_disable(cs35l34->num_core_supplies,
cs35l34->core_supplies);
}
static int __maybe_unused cs35l34_runtime_resume(struct device *dev)
{
struct cs35l34_private *cs35l34 = dev_get_drvdata(dev);
int ret;
ret = regulator_bulk_enable(cs35l34->num_core_supplies,
cs35l34->core_supplies);
if (ret != 0) {
dev_err(dev, "Failed to enable core supplies: %d\n",
ret);
return ret;
}
regcache_cache_only(cs35l34->regmap, false);
gpiod_set_value_cansleep(cs35l34->reset_gpio, 1);
msleep(CS35L34_START_DELAY);
ret = regcache_sync(cs35l34->regmap);
if (ret != 0) {
dev_err(dev, "Failed to restore register cache\n");
goto err;
}
return 0;
err:
regcache_cache_only(cs35l34->regmap, true);
regulator_bulk_disable(cs35l34->num_core_supplies,
cs35l34->core_supplies);
return ret;
}
static int __maybe_unused cs35l34_runtime_suspend(struct device *dev)
{
struct cs35l34_private *cs35l34 = dev_get_drvdata(dev);
regcache_cache_only(cs35l34->regmap, true);
regcache_mark_dirty(cs35l34->regmap);
gpiod_set_value_cansleep(cs35l34->reset_gpio, 0);
regulator_bulk_disable(cs35l34->num_core_supplies,
cs35l34->core_supplies);
return 0;
}
static const struct dev_pm_ops cs35l34_pm_ops = {
SET_RUNTIME_PM_OPS(cs35l34_runtime_suspend,
cs35l34_runtime_resume,
NULL)
};
static const struct of_device_id cs35l34_of_match[] = {
{.compatible = "cirrus,cs35l34"},
{},
};
MODULE_DEVICE_TABLE(of, cs35l34_of_match);
static const struct i2c_device_id cs35l34_id[] = {
{"cs35l34", 0},
{}
};
MODULE_DEVICE_TABLE(i2c, cs35l34_id);
static struct i2c_driver cs35l34_i2c_driver = {
.driver = {
.name = "cs35l34",
.pm = &cs35l34_pm_ops,
.of_match_table = cs35l34_of_match,
},
.id_table = cs35l34_id,
.probe = cs35l34_i2c_probe,
.remove = cs35l34_i2c_remove,
};
static int __init cs35l34_modinit(void)
{
int ret;
ret = i2c_add_driver(&cs35l34_i2c_driver);
if (ret != 0) {
pr_err("Failed to register CS35l34 I2C driver: %d\n", ret);
return ret;
}
return 0;
}
module_init(cs35l34_modinit);
static void __exit cs35l34_exit(void)
{
i2c_del_driver(&cs35l34_i2c_driver);
}
module_exit(cs35l34_exit);
MODULE_DESCRIPTION("ASoC CS35l34 driver");
MODULE_AUTHOR("Paul Handrigan, Cirrus Logic Inc, <Paul.Handrigan@cirrus.com>");
MODULE_LICENSE("GPL");
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