Re: [alsa-devel] [PATCH v2 1/2] ASoC: Add support for CS35L32 Boosted Amplifier

On 8/1/14, 9:45 AM, Brian Austin wrote:

This patch adds support for the Cirrus Logic CS35L32 Boosted Amplifier I2S output provides monitor data to the SOC/CODEC/DSP for speaker protection algorithms

Changes for v2:

• Interrupt Status registers added to regmap volatile
• Use Speaker for volume control name
• Zero Cross Switch rename
• Remove Gain Manager from DTS and add to kcontrols
• Add VP-Supply to regulator list
• Remove uneeded DAPM event
• Specify MCLK rates as numbers
• Move probe/remove code to device level probe/remove
• Move regmap_register_patch to after REV_ID check

Signed-off-by: Brian Austin brian.austin@cirrus.com

include/dt-bindings/sound/cs35l32.h | 26 ++ sound/soc/codecs/Kconfig | 5 + sound/soc/codecs/Makefile | 2 + sound/soc/codecs/cs35l32.c | 643 +++++++++++++++++++++++++++++++++++ sound/soc/codecs/cs35l32.h | 93 +++++ 5 files changed, 769 insertions(+) create mode 100644 include/dt-bindings/sound/cs35l32.h create mode 100644 sound/soc/codecs/cs35l32.c create mode 100644 sound/soc/codecs/cs35l32.h

diff --git a/include/dt-bindings/sound/cs35l32.h b/include/dt-bindings/sound/cs35l32.h new file mode 100644 index 0000000..0c6d6a3 --- /dev/null +++ b/include/dt-bindings/sound/cs35l32.h @@ -0,0 +1,26 @@ +#ifndef __DT_CS35L32_H +#define __DT_CS35L32_H

+#define CS35L32_BOOST_MGR_AUTO 0 +#define CS35L32_BOOST_MGR_AUTO_AUDIO 1 +#define CS35L32_BOOST_MGR_BYPASS 2 +#define CS35L32_BOOST_MGR_FIXED 3

+#define CS35L32_DATA_CFG_LR_VP 0 +#define CS35L32_DATA_CFG_LR_STAT 1 +#define CS35L32_DATA_CFG_LR 2 +#define CS35L32_DATA_CFG_LR_VPSTAT 3

+#define CS35L32_BATT_THRESH_3_1V 0 +#define CS35L32_BATT_THRESH_3_2V 1 +#define CS35L32_BATT_THRESH_3_3V 2 +#define CS35L32_BATT_THRESH_3_4V 3

+#define CS35L32_BATT_RECOV_3_1V 0 +#define CS35L32_BATT_RECOV_3_2V 1 +#define CS35L32_BATT_RECOV_3_3V 2 +#define CS35L32_BATT_RECOV_3_4V 3 +#define CS35L32_BATT_RECOV_3_5V 4 +#define CS35L32_BATT_RECOV_3_6V 5

+#endif /* __DT_CS35L32_H */ diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig index 8838838..77e5383 100644 --- a/sound/soc/codecs/Kconfig +++ b/sound/soc/codecs/Kconfig @@ -43,6 +43,7 @@ config SND_SOC_ALL_CODECS select SND_SOC_ALC5623 if I2C select SND_SOC_ALC5632 if I2C select SND_SOC_CQ0093VC if MFD_DAVINCI_VOICECODEC

• select SND_SOC_CS35L32 if I2C select SND_SOC_CS42L51_I2C if I2C select SND_SOC_CS42L52 if I2C && INPUT select SND_SOC_CS42L56 if I2C && INPUT

@@ -323,6 +324,10 @@ config SND_SOC_ALC5632 config SND_SOC_CQ0093VC tristate

+config SND_SOC_CS35L32

• tristate "Cirrus Logic CS35L32 CODEC"
• depends on I2C

config SND_SOC_CS42L51 tristate

diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile index 20afe0f..1dacefb 100644 --- a/sound/soc/codecs/Makefile +++ b/sound/soc/codecs/Makefile @@ -32,6 +32,7 @@ snd-soc-ak4671-objs := ak4671.o snd-soc-ak5386-objs := ak5386.o snd-soc-arizona-objs := arizona.o snd-soc-cq93vc-objs := cq93vc.o +snd-soc-cs35l32-objs := cs35l32.o snd-soc-cs42l51-objs := cs42l51.o snd-soc-cs42l51-i2c-objs := cs42l51-i2c.o snd-soc-cs42l52-objs := cs42l52.o @@ -203,6 +204,7 @@ obj-$(CONFIG_SND_SOC_ALC5623) += snd-soc-alc5623.o obj-$(CONFIG_SND_SOC_ALC5632) += snd-soc-alc5632.o obj-$(CONFIG_SND_SOC_ARIZONA) += snd-soc-arizona.o obj-$(CONFIG_SND_SOC_CQ0093VC) += snd-soc-cq93vc.o +obj-$(CONFIG_SND_SOC_CS35L32) += snd-soc-cs35l32.o obj-$(CONFIG_SND_SOC_CS42L51) += snd-soc-cs42l51.o obj-$(CONFIG_SND_SOC_CS42L51_I2C) += snd-soc-cs42l51-i2c.o obj-$(CONFIG_SND_SOC_CS42L52) += snd-soc-cs42l52.o diff --git a/sound/soc/codecs/cs35l32.c b/sound/soc/codecs/cs35l32.c new file mode 100644 index 0000000..5e23e19 --- /dev/null +++ b/sound/soc/codecs/cs35l32.c @@ -0,0 +1,643 @@ +/*

• • cs35l32.c -- CS35L32 ALSA SoC audio driver
• • Copyright 2014 CirrusLogic, Inc.
• • Author: Brian Austin brian.austin@cirrus.com
• • This program is free software; you can redistribute it and/or modify
• • it under the terms of the GNU General Public License version 2 as
• • published by the Free Software Foundation.
• */

+#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/version.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/i2c.h> +#include <linux/gpio.h> +#include <linux/regmap.h> +#include <linux/slab.h> +#include <linux/platform_device.h> +#include <linux/regulator/consumer.h> +#include <linux/gpio/consumer.h> +#include <linux/of_device.h> +#include <linux/slab.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> +#include <sound/soc-dapm.h> +#include <sound/initval.h> +#include <sound/tlv.h> +#include <dt-bindings/sound/cs35l32.h>

+#include "cs35l32.h"

+#define CS35L32_NUM_SUPPLIES 2 +static const char *const cs35l32_supply_names[CS35L32_NUM_SUPPLIES] = {

• "VA",
• "VP",

+};

+struct cs35l32_private {

• struct regmap *regmap;
• struct snd_soc_codec *codec;
• struct regulator_bulk_data supplies[CS35L32_NUM_SUPPLIES];
• struct cs35l32_platform_data pdata;
• struct gpio_desc *reset_gpio;

+};

+static const struct reg_default cs35l32_reg_defaults[] = {

• { 0x06, 0x04 }, /* Power Ctl 1 */
• { 0x07, 0xE8 }, /* Power Ctl 2 */
• { 0x08, 0x40 }, /* Clock Ctl */
• { 0x09, 0x20 }, /* Low Battery Threshold */
• { 0x0A, 0x00 }, /* Voltage Monitor [RO] */
• { 0x0B, 0x40 }, /* Conv Peak Curr Protection CTL */
• { 0x0C, 0x07 }, /* IMON Scaling */
• { 0x0D, 0x03 }, /* Audio/LED Pwr Manager */
• { 0x0F, 0x20 }, /* Serial Port Control */
• { 0x10, 0x14 }, /* Class D Amp CTL */
• { 0x11, 0x00 }, /* Protection Release CTL */
• { 0x12, 0xFF }, /* Interrupt Mask 1 */
• { 0x13, 0xFF }, /* Interrupt Mask 2 */
• { 0x14, 0xFF }, /* Interrupt Mask 3 */
• { 0x19, 0x00 }, /* LED Flash Mode Current */
• { 0x1A, 0x00 }, /* LED Movie Mode Current */
• { 0x1B, 0x20 }, /* LED Flash Timer */
• { 0x1C, 0x00 }, /* LED Flash Inhibit Current */

+};

+static bool cs35l32_readable_register(struct device *dev, unsigned int reg) +{

• switch (reg) {
• case CS35L32_DEVID_AB:
• case CS35L32_DEVID_CD:
• case CS35L32_DEVID_E:
• case CS35L32_FAB_ID:
• case CS35L32_REV_ID:
• case CS35L32_PWRCTL1:
• case CS35L32_PWRCTL2:
• case CS35L32_CLK_CTL:
• case CS35L32_BATT_THRESHOLD:
• case CS35L32_VMON:
• case CS35L32_BST_CPCP_CTL:
• case CS35L32_IMON_SCALING:
• case CS35L32_AUDIO_LED_MNGR:
• case CS35L32_ADSP_CTL:
• case CS35L32_CLASSD_CTL:
• case CS35L32_PROTECT_CTL:
• case CS35L32_INT_MASK_1:
• case CS35L32_INT_MASK_2:
• case CS35L32_INT_MASK_3:
• case CS35L32_INT_STATUS_1:
• case CS35L32_INT_STATUS_2:
• case CS35L32_INT_STATUS_3:
• case CS35L32_LED_STATUS:
• case CS35L32_FLASH_MODE:
• case CS35L32_MOVIE_MODE:
• case CS35L32_FLASH_TIMER:
• case CS35L32_FLASH_INHIBIT:

• return true;
  

• default:

• return false;
  

• }

+}

+static bool cs35l32_volatile_register(struct device *dev, unsigned int reg) +{

• switch (reg) {
• case CS35L32_DEVID_AB:
• case CS35L32_DEVID_CD:
• case CS35L32_DEVID_E:
• case CS35L32_FAB_ID:
• case CS35L32_REV_ID:
• case CS35L32_INT_STATUS_1:
• case CS35L32_INT_STATUS_2:
• case CS35L32_INT_STATUS_3:
• case CS35L32_LED_STATUS:

• return 1;
  

• default:

• return 0;
  

• }

+}

+static bool cs35l32_precious_register(struct device *dev, unsigned int reg) +{

• switch (reg) {
• case CS35L32_INT_STATUS_1:
• case CS35L32_INT_STATUS_2:
• case CS35L32_INT_STATUS_3:
• case CS35L32_LED_STATUS:

• return 1;
  

• default:

• return 0;
  

• }

+}

+static DECLARE_TLV_DB_SCALE(classd_ctl_tlv, 900, 300, 0);

+static const struct snd_kcontrol_new imon_ctl =

• SOC_DAPM_SINGLE("Switch", CS35L32_PWRCTL2, 6, 1, 1);

+static const struct snd_kcontrol_new vmon_ctl =

• SOC_DAPM_SINGLE("Switch", CS35L32_PWRCTL2, 7, 1, 1);

+static const struct snd_kcontrol_new vpmon_ctl =

• SOC_DAPM_SINGLE("Switch", CS35L32_PWRCTL2, 5, 1, 1);

+static const struct snd_kcontrol_new cs35l32_snd_controls[] = {

• SOC_SINGLE_TLV("Speaker Volume", CS35L32_CLASSD_CTL,

•        3, 0x04, 1, classd_ctl_tlv),
  

• SOC_SINGLE("Zero Cross Switch", CS35L32_CLASSD_CTL, 2, 1, 0),
• SOC_SINGLE("Gain Manager Switch", CS35L32_AUDIO_LED_MNGR, 3, 1, 0),

+};

+static const struct snd_soc_dapm_widget cs35l32_dapm_widgets[] = {

• SND_SOC_DAPM_SUPPLY("BOOST", CS35L32_PWRCTL1, 2, 1, NULL, 0),
• SND_SOC_DAPM_OUT_DRV("Speaker", CS35L32_PWRCTL1, 7, 1, NULL, 0),
• SND_SOC_DAPM_AIF_OUT("SDOUT", NULL, 0, CS35L32_PWRCTL2, 3, 1),
• SND_SOC_DAPM_INPUT("VP"),
• SND_SOC_DAPM_INPUT("ISENSE"),
• SND_SOC_DAPM_INPUT("VSENSE"),
• SND_SOC_DAPM_SWITCH("VMON ADC", CS35L32_PWRCTL2, 7, 1, &vmon_ctl),
• SND_SOC_DAPM_SWITCH("IMON ADC", CS35L32_PWRCTL2, 6, 1, &imon_ctl),
• SND_SOC_DAPM_SWITCH("VPMON ADC", CS35L32_PWRCTL2, 5, 1, &vpmon_ctl),

+};

+static const struct snd_soc_dapm_route cs35l32_audio_map[] = {

• {"Speaker", NULL, "BOOST"},
• {"VMON ADC", NULL, "VSENSE"},
• {"IMON ADC", NULL, "ISENSE"},
• {"VPMON ADC", NULL, "VP"},
• {"SDOUT", "Switch", "VMON ADC"},
• {"SDOUT", "Switch", "IMON ADC"},
• {"SDOUT", "Switch", "VPMON ADC"},
• {"Capture", NULL, "SDOUT"},

+};

+static int cs35l32_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt) +{

• struct snd_soc_codec *codec = codec_dai->codec;
• switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
• case SND_SOC_DAIFMT_CBM_CFM:

• snd_soc_update_bits(codec, CS35L32_ADSP_CTL,
  

• 		    CS35L32_ADSP_MASTER_MASK,
  

• 		CS35L32_ADSP_MASTER_MASK);
  

• break;
  

• case SND_SOC_DAIFMT_CBS_CFS:

• snd_soc_update_bits(codec, CS35L32_ADSP_CTL,
  

• 		    CS35L32_ADSP_MASTER_MASK, 0);
  

• break;
  

• default:

• return -EINVAL;
  

• }
• return 0;

+}

+static int cs35l32_set_tristate(struct snd_soc_dai *dai, int tristate) +{

• struct snd_soc_codec *codec = dai->codec;
• return snd_soc_update_bits(codec, CS35L32_PWRCTL2,

• 			CS35L32_SDOUT_3ST, tristate << 3);
  

+}

+static const struct snd_soc_dai_ops cs35l32_ops = {

• .set_fmt = cs35l32_set_dai_fmt,
• .set_tristate = cs35l32_set_tristate,

+};

+static struct snd_soc_dai_driver cs35l32_dai[] = {

• {

• .name = "cs35l32-monitor",
  

• .id = 0,
  

• .capture = {
  

• 	.stream_name = "Capture",
  

• 	.channels_min = 2,
  

• 	.channels_max = 2,
  

• 	.rates = CS35L32_RATES,
  

• 	.formats = CS35L32_FORMATS,
  

• },
  

• .ops = &cs35l32_ops,
  

• .symmetric_rates = 1,
  

• }

+};

+static int cs35l32_codec_set_sysclk(struct snd_soc_codec *codec,

• 	      int clk_id, int source, unsigned int freq, int dir)
  

+{

• switch (freq) {
• case 6000000:

• snd_soc_update_bits(codec, CS35L32_CLK_CTL,
  

• 		    CS35L32_MCLK_DIV2_MASK, 0);
  

• snd_soc_update_bits(codec, CS35L32_CLK_CTL,
  

• 		    CS35L32_MCLK_RATIO_MASK,
  

• 			CS35L32_MCLK_RATIO);
  

• break;
  

• case 12000000:

• snd_soc_update_bits(codec, CS35L32_CLK_CTL,
  

• 		    CS35L32_MCLK_DIV2_MASK,
  

• 			CS35L32_MCLK_DIV2_MASK);
  

• snd_soc_update_bits(codec, CS35L32_CLK_CTL,
  

• 		    CS35L32_MCLK_RATIO_MASK,
  

• 			CS35L32_MCLK_RATIO);
  

• break;
  

• case 6144000:

• snd_soc_update_bits(codec, CS35L32_CLK_CTL,
  

• 		    CS35L32_MCLK_DIV2_MASK, 0);
  

• snd_soc_update_bits(codec, CS35L32_CLK_CTL,
  

• 		    CS35L32_MCLK_RATIO_MASK, 0);
  

• break;
  

• case 12288000:

• snd_soc_update_bits(codec, CS35L32_CLK_CTL,
  

• 		    CS35L32_MCLK_DIV2_MASK,
  

• 			CS35L32_MCLK_DIV2_MASK);
  

• snd_soc_update_bits(codec, CS35L32_CLK_CTL,
  

• 		    CS35L32_MCLK_RATIO_MASK, 0);
  

• break;
  

• default:

• return -EINVAL;
  

• }
• return 0;

+}

+static struct snd_soc_codec_driver soc_codec_dev_cs35l32 = {

• .set_sysclk = cs35l32_codec_set_sysclk,
• .dapm_widgets = cs35l32_dapm_widgets,
• .num_dapm_widgets = ARRAY_SIZE(cs35l32_dapm_widgets),
• .dapm_routes = cs35l32_audio_map,
• .num_dapm_routes = ARRAY_SIZE(cs35l32_audio_map),
• .controls = cs35l32_snd_controls,
• .num_controls = ARRAY_SIZE(cs35l32_snd_controls),

+};

+/* Current and threshold powerup sequence Pg37 in datasheet */ +static const struct reg_default cs35l32_monitor_patch[] = {

• { 0x00, 0x99 },
• { 0x48, 0x17 },
• { 0x49, 0x56 },
• { 0x43, 0x01 },
• { 0x3B, 0x62 },
• { 0x3C, 0x80 },
• { 0x00, 0x00 },

+};

+static struct regmap_config cs35l32_regmap = {

• .reg_bits = 8,
• .val_bits = 8,
• .max_register = CS35L32_MAX_REGISTER,
• .reg_defaults = cs35l32_reg_defaults,
• .num_reg_defaults = ARRAY_SIZE(cs35l32_reg_defaults),
• .volatile_reg = cs35l32_volatile_register,
• .readable_reg = cs35l32_readable_register,
• .precious_reg = cs35l32_precious_register,
• .cache_type = REGCACHE_RBTREE,

+};

+static int cs35l32_handle_of_data(struct i2c_client *i2c_client,

• 		    struct cs35l32_platform_data *pdata)
  

+{

• struct device_node *np = i2c_client->dev.of_node;
• unsigned int val;
• if (of_property_read_u32(np, "cirrus,sdout-share", &val) >= 0)

• pdata->sdout_share = val;
  

• of_property_read_u32(np, "cirrus,boost-manager", &val);
• switch (val) {
• case CS35L32_BOOST_MGR_AUTO:
• case CS35L32_BOOST_MGR_AUTO_AUDIO:
• case CS35L32_BOOST_MGR_BYPASS:
• case CS35L32_BOOST_MGR_FIXED:

• pdata->boost_mng = val;
  

• break;
  

• default:

• dev_err(&i2c_client->dev,
  

• 	"Wrong cirrus,boost-manager DT value %d\n", val);
  

• pdata->boost_mng = CS35L32_BOOST_MGR_BYPASS;
  

• }
• of_property_read_u32(np, "cirrus,sdout-datacfg", &val);
• switch (val) {
• case CS35L32_DATA_CFG_LR_VP:
• case CS35L32_DATA_CFG_LR_STAT:
• case CS35L32_DATA_CFG_LR:
• case CS35L32_DATA_CFG_LR_VPSTAT:

• pdata->sdout_datacfg = val;
  

• break;
  

• default:

• dev_err(&i2c_client->dev,
  

• 	"Wrong cirrus,sdout-datacfg DT value %d\n", val);
  

• pdata->sdout_datacfg = CS35L32_DATA_CFG_LR;
  

• }
• of_property_read_u32(np, "cirrus,battery-threshold", &val);
• switch (val) {
• case CS35L32_BATT_THRESH_3_1V:
• case CS35L32_BATT_THRESH_3_2V:
• case CS35L32_BATT_THRESH_3_3V:
• case CS35L32_BATT_THRESH_3_4V:

• pdata->batt_thresh = val;
  

• break;
  

• default:

• dev_err(&i2c_client->dev,
  

• 	"Wrong cirrus,battery-threshold DT value %d\n", val);
  

• pdata->batt_thresh = CS35L32_BATT_THRESH_3_3V;
  

• }
• of_property_read_u32(np, "cirrus,battery-recovery", &val);
• switch (val) {
• case CS35L32_BATT_RECOV_3_1V:
• case CS35L32_BATT_RECOV_3_2V:
• case CS35L32_BATT_RECOV_3_3V:
• case CS35L32_BATT_RECOV_3_4V:
• case CS35L32_BATT_RECOV_3_5V:
• case CS35L32_BATT_RECOV_3_6V:

• pdata->batt_recov = val;
  

• break;
  

• default:

• dev_err(&i2c_client->dev,
  

• 	"Wrong cirrus,battery-recovery DT value %d\n", val);
  

• pdata->batt_recov = CS35L32_BATT_RECOV_3_4V;
  

• }
• return 0;

+}

+static int cs35l32_i2c_probe(struct i2c_client *i2c_client,

• 		       const struct i2c_device_id *id)
  

+{

• struct cs35l32_private *cs35l32;
• struct cs35l32_platform_data *pdata =

• dev_get_platdata(&i2c_client->dev);
  

• int ret, i;
• unsigned int devid = 0;
• unsigned int reg;
• cs35l32 = devm_kzalloc(&i2c_client->dev, sizeof(struct cs35l32_private),

• 	       GFP_KERNEL);
  

• if (!cs35l32) {

• dev_err(&i2c_client->dev, "could not allocate codec\n");
  

• return -ENOMEM;
  

• }
• i2c_set_clientdata(i2c_client, cs35l32);
• cs35l32->regmap = devm_regmap_init_i2c(i2c_client, &cs35l32_regmap);
• if (IS_ERR(cs35l32->regmap)) {

• ret = PTR_ERR(cs35l32->regmap);
  

• dev_err(&i2c_client->dev, "regmap_init() failed: %d\n", ret);
  

• return ret;
  

• }
• if (pdata) {

• cs35l32->pdata = *pdata;
  

• } else {

• pdata = devm_kzalloc(&i2c_client->dev,
  

• 		     sizeof(struct cs35l32_platform_data),
  

• 		GFP_KERNEL);
  

• if (!pdata) {
  

• 	dev_err(&i2c_client->dev, "could not allocate pdata\n");
  

• 	return -ENOMEM;
  

• }
  

• if (i2c_client->dev.of_node) {
  

• 	ret = cs35l32_handle_of_data(i2c_client,
  

• 				     &cs35l32->pdata);
  

• 	if (ret != 0)
  

• 		return ret;
  

Doesn't cs35l32_handle_of_data() always return 0?

• }
  

• }
• for (i = 0; i < ARRAY_SIZE(cs35l32->supplies); i++)

• cs35l32->supplies[i].supply = cs35l32_supply_names[i];
  

• ret = devm_regulator_bulk_get(&i2c_client->dev,

• 		      ARRAY_SIZE(cs35l32->supplies),
  

• 		      cs35l32->supplies);
  

• if (ret != 0) {

• dev_err(&i2c_client->dev,
  

• 	"Failed to request supplies: %d\n", ret);
  

• return ret;
  

• }
• ret = regulator_bulk_enable(ARRAY_SIZE(cs35l32->supplies),

• 		    cs35l32->supplies);
  

• if (ret != 0) {

• dev_err(&i2c_client->dev,
  

• 	"Failed to enable supplies: %d\n", ret);
  

• return ret;
  

• }
• /* Reset the Device */
• cs35l32->reset_gpio = devm_gpiod_get(&i2c_client->dev,

• "reset-gpios");
  

• if (IS_ERR(cs35l32->reset_gpio)) {

• ret = PTR_ERR(cs35l32->reset_gpio);
  

• if (ret != -ENOENT && ret != -ENOSYS)
  

• 	return ret;
  

• cs35l32->reset_gpio = NULL;
  

• } else {

• ret = gpiod_direction_output(cs35l32->reset_gpio, 0);
  

• if (ret)
  

• 	return ret;
  

• gpiod_set_value_cansleep(cs35l32->reset_gpio, 1);
  

• }
• /* initialize codec */
• ret = regmap_read(cs35l32->regmap, CS35L32_DEVID_AB, &reg);
• devid = (reg & 0xFF) << 12;
• ret = regmap_read(cs35l32->regmap, CS35L32_DEVID_CD, &reg);
• devid |= (reg & 0xFF) << 4;
• ret = regmap_read(cs35l32->regmap, CS35L32_DEVID_E, &reg);
• devid |= (reg & 0xF0) >> 4;
• if (devid != CS35L32_CHIP_ID) {

• ret = -ENODEV;
  

• dev_err(&i2c_client->dev,
  

• 	"CS35L32 Device ID (%X). Expected %X\n",
  

• 	devid, CS35L32_CHIP_ID);
  

• return ret;
  

• }
• ret = regmap_read(cs35l32->regmap, CS35L32_REV_ID, &reg);
• if (ret < 0) {

• dev_err(&i2c_client->dev, "Get Revision ID failed\n");
  

• return ret;
  

• }
• ret = regmap_register_patch(cs35l32->regmap, cs35l32_monitor_patch,

• 		    ARRAY_SIZE(cs35l32_monitor_patch));
  

• if (ret < 0) {

• dev_err(&i2c_client->dev, "Failed to apply errata patch\n");
  

• return ret;
  

• }
• dev_info(&i2c_client->dev,

•  "Cirrus Logic CS35L32, Revision: %02X\n", reg & 0xFF);
  

• /* Setup VBOOST Management */
• if (cs35l32->pdata.boost_mng)

• regmap_update_bits(cs35l32->regmap, CS35L32_AUDIO_LED_MNGR,
  

• 		   CS35L32_BOOST_MASK,
  

• 		cs35l32->pdata.boost_mng);
  

• /* Setup ADSP Format Config */
• if (cs35l32->pdata.sdout_share)

• regmap_update_bits(cs35l32->regmap, CS35L32_ADSP_CTL,
  

• 		    CS35L32_ADSP_SHARE_MASK,
  

• 		cs35l32->pdata.sdout_share << 3);
  

• /* Setup ADSP Data Configuration */
• if (cs35l32->pdata.sdout_datacfg)

• regmap_update_bits(cs35l32->regmap, CS35L32_ADSP_CTL,
  

• 		   CS35L32_ADSP_DATACFG_MASK,
  

• 		cs35l32->pdata.sdout_datacfg << 4);
  

• /* Setup Low Battery Recovery */
• if (cs35l32->pdata.batt_recov)

• regmap_update_bits(cs35l32->regmap, CS35L32_BATT_THRESHOLD,
  

• 		   CS35L32_BATT_REC_MASK,
  

• 		cs35l32->pdata.batt_recov << 1);
  

• /* Setup Low Battery Threshold */
• if (cs35l32->pdata.batt_thresh)

• regmap_update_bits(cs35l32->regmap, CS35L32_BATT_THRESHOLD,
  

• 		   CS35L32_BATT_THRESH_MASK,
  

• 		cs35l32->pdata.batt_thresh << 4);
  

• /* Power down the AMP */
• regmap_update_bits(cs35l32->regmap, CS35L32_PWRCTL1, CS35L32_PDN_AMP,

• 	    CS35L32_PDN_AMP);
  

• /* Clear MCLK Error Bit since we don't have the clock yet */
• ret = regmap_read(cs35l32->regmap, CS35L32_INT_STATUS_1, &reg);
• ret = snd_soc_register_codec(&i2c_client->dev,

• 	&soc_codec_dev_cs35l32, cs35l32_dai,
  

• 	ARRAY_SIZE(cs35l32_dai));
  

• if (ret < 0)

• return ret;
  

• return 0;

Should be able to just "return ret" here.

Dinh