diff options
Diffstat (limited to 'sound/soc/codecs/cs35l34.c')
| -rw-r--r-- | sound/soc/codecs/cs35l34.c | 1240 |
1 files changed, 1240 insertions, 0 deletions
diff --git a/sound/soc/codecs/cs35l34.c b/sound/soc/codecs/cs35l34.c new file mode 100644 index 000000000..57d125c03 --- /dev/null +++ b/sound/soc/codecs/cs35l34.c @@ -0,0 +1,1240 @@ +// 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_device.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/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, + ®); + 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, + ®); + 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_RBTREE, + + .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, ¤t1); + + 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", 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, ®); + 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_new = 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"); |