[PATCH v2 1/2] ASoC: Add support for CS35L32 Boosted Amplifier

[PATCH v2 1/2] ASoC: Add support for CS35L32 Boosted Amplifier

[Brian Austin]

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-jGc1dHjMKG3QT0dZR+AlfA@public.gmane.org>
---
 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-jGc1dHjMKG3QT0dZR+AlfA@public.gmane.org>
+ *
+ * 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;
+		}
+	}
+
+	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;
+}
+
+static int cs35l32_i2c_remove(struct i2c_client *i2c_client)
+{
+	struct cs35l32_private *cs35l32 = i2c_get_clientdata(i2c_client);
+
+	snd_soc_unregister_codec(&i2c_client->dev);
+
+	/* Hold down reset */
+	if (cs35l32->reset_gpio)
+		gpiod_set_value_cansleep(cs35l32->reset_gpio, 0);
+
+	regulator_bulk_free(ARRAY_SIZE(cs35l32->supplies), cs35l32->supplies);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM_RUNTIME
+static int cs35l32_runtime_suspend(struct device *dev)
+{
+	struct cs35l32_private *cs35l32 = dev_get_drvdata(dev);
+
+	regcache_cache_only(cs35l32->regmap, true);
+	regcache_mark_dirty(cs35l32->regmap);
+
+	/* Hold down reset */
+	if (cs35l32->reset_gpio)
+		gpiod_set_value_cansleep(cs35l32->reset_gpio, 0);
+
+	/* remove power */
+	regulator_bulk_disable(ARRAY_SIZE(cs35l32->supplies),
+			       cs35l32->supplies);
+
+	return 0;
+}
+
+static int cs35l32_runtime_resume(struct device *dev)
+{
+	struct cs35l32_private *cs35l32 = dev_get_drvdata(dev);
+	int ret;
+
+	/* Enable power */
+	ret = regulator_bulk_enable(ARRAY_SIZE(cs35l32->supplies),
+				    cs35l32->supplies);
+	if (ret != 0) {
+		dev_err(dev, "Failed to enable supplies: %d\n",
+			ret);
+		return ret;
+	}
+
+	if (cs35l32->reset_gpio)
+		gpiod_set_value_cansleep(cs35l32->reset_gpio, 1);
+
+	regcache_cache_only(cs35l32->regmap, false);
+	regcache_sync(cs35l32->regmap);
+
+	return 0;
+}
+#endif
+
+static const struct dev_pm_ops cs35l32_runtime_pm = {
+	SET_RUNTIME_PM_OPS(cs35l32_runtime_suspend, cs35l32_runtime_resume,
+			   NULL)
+};
+
+static const struct of_device_id cs35l32_of_match[] = {
+	{ .compatible = "cirrus,cs35l32", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, cs35l32_of_match);
+
+
+static const struct i2c_device_id cs35l32_id[] = {
+	{"cs35l32", 0},
+	{}
+};
+
+MODULE_DEVICE_TABLE(i2c, cs35l32_id);
+
+static struct i2c_driver cs35l32_i2c_driver = {
+	.driver = {
+		   .name = "cs35l32",
+		   .owner = THIS_MODULE,
+		   .pm = &cs35l32_runtime_pm,
+		   .of_match_table = cs35l32_of_match,
+		   },
+	.id_table = cs35l32_id,
+	.probe = cs35l32_i2c_probe,
+	.remove = cs35l32_i2c_remove,
+};
+
+module_i2c_driver(cs35l32_i2c_driver);
+
+MODULE_DESCRIPTION("ASoC CS35L32 driver");
+MODULE_AUTHOR("Brian Austin, Cirrus Logic Inc, <brian.austin-jGc1dHjMKG3QT0dZR+AlfA@public.gmane.org>");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/codecs/cs35l32.h b/sound/soc/codecs/cs35l32.h
new file mode 100644
index 0000000..31ab804
--- /dev/null
+++ b/sound/soc/codecs/cs35l32.h
@@ -0,0 +1,93 @@
+/*
+ * cs35l32.h -- CS35L32 ALSA SoC audio driver
+ *
+ * Copyright 2014 CirrusLogic, Inc.
+ *
+ * Author: Brian Austin <brian.austin-jGc1dHjMKG3QT0dZR+AlfA@public.gmane.org>
+ *
+ * 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.
+ *
+ */
+
+#ifndef __CS35L32_H__
+#define __CS35L32_H__
+
+struct cs35l32_platform_data {
+	/* Low Battery Threshold */
+	unsigned int batt_thresh;
+	/* Low Battery Recovery */
+	unsigned int batt_recov;
+	/* LED Current Management*/
+	unsigned int led_mng;
+	/* Audio Gain w/ LED */
+	unsigned int audiogain_mng;
+	/* Boost Management */
+	unsigned int boost_mng;
+	/* Data CFG for DUAL device */
+	unsigned int sdout_datacfg;
+	/* SDOUT Sharing */
+	unsigned int sdout_share;
+};
+
+#define CS35L32_CHIP_ID		0x00035A32
+#define CS35L32_DEVID_AB	0x01	/* Device ID A & B [RO] */
+#define CS35L32_DEVID_CD	0x02    /* Device ID C & D [RO] */
+#define CS35L32_DEVID_E		0x03    /* Device ID E [RO] */
+#define CS35L32_FAB_ID		0x04	/* Fab ID [RO] */
+#define CS35L32_REV_ID		0x05	/* Revision ID [RO] */
+#define CS35L32_PWRCTL1		0x06    /* Power Ctl 1 */
+#define CS35L32_PWRCTL2		0x07    /* Power Ctl 2 */
+#define CS35L32_CLK_CTL		0x08	/* Clock Ctl */
+#define CS35L32_BATT_THRESHOLD	0x09	/* Low Battery Threshold */
+#define CS35L32_VMON		0x0A	/* Voltage Monitor [RO] */
+#define CS35L32_BST_CPCP_CTL	0x0B	/* Conv Peak Curr Protection CTL */
+#define CS35L32_IMON_SCALING	0x0C	/* IMON Scaling */
+#define CS35L32_AUDIO_LED_MNGR	0x0D	/* Audio/LED Pwr Manager */
+#define CS35L32_ADSP_CTL	0x0F	/* Serial Port Control */
+#define CS35L32_CLASSD_CTL	0x10	/* Class D Amp CTL */
+#define CS35L32_PROTECT_CTL	0x11	/* Protection Release CTL */
+#define CS35L32_INT_MASK_1	0x12	/* Interrupt Mask 1 */
+#define CS35L32_INT_MASK_2	0x13	/* Interrupt Mask 2 */
+#define CS35L32_INT_MASK_3	0x14	/* Interrupt Mask 3 */
+#define CS35L32_INT_STATUS_1	0x15	/* Interrupt Status 1 [RO] */
+#define CS35L32_INT_STATUS_2	0x16	/* Interrupt Status 2 [RO] */
+#define CS35L32_INT_STATUS_3	0x17	/* Interrupt Status 3 [RO] */
+#define CS35L32_LED_STATUS	0x18	/* LED Lighting Status [RO] */
+#define CS35L32_FLASH_MODE	0x19	/* LED Flash Mode Current */
+#define CS35L32_MOVIE_MODE	0x1A	/* LED Movie Mode Current */
+#define CS35L32_FLASH_TIMER	0x1B	/* LED Flash Timer */
+#define CS35L32_FLASH_INHIBIT	0x1C	/* LED Flash Inhibit Current */
+#define CS35L32_MAX_REGISTER	0x1C
+
+#define CS35L32_MCLK_DIV2	0x01
+#define CS35L32_MCLK_RATIO	0x01
+#define CS35L32_MCLKDIS		0x80
+#define CS35L32_PDN_ALL		0x01
+#define CS35L32_PDN_AMP		0x80
+#define CS35L32_PDN_BOOST	0x04
+#define CS35L32_PDN_IMON	0x40
+#define CS35L32_PDN_VMON	0x80
+#define CS35L32_PDN_VPMON	0x20
+#define CS35L32_PDN_ADSP	0x08
+
+#define CS35L32_MCLK_DIV2_MASK		0x40
+#define CS35L32_MCLK_RATIO_MASK		0x01
+#define CS35L32_MCLK_MASK		0x41
+#define CS35L32_ADSP_MASTER_MASK	0x40
+#define CS35L32_BOOST_MASK		0x03
+#define CS35L32_GAIN_MGR_MASK		0x08
+#define CS35L32_ADSP_SHARE_MASK		0x08
+#define CS35L32_ADSP_DATACFG_MASK	0x30
+#define CS35L32_SDOUT_3ST		0x80
+#define CS35L32_BATT_REC_MASK		0x0E
+#define CS35L32_BATT_THRESH_MASK	0x30
+
+#define CS35L32_RATES (SNDRV_PCM_RATE_48000)
+#define CS35L32_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
+			SNDRV_PCM_FMTBIT_S24_LE | \
+			SNDRV_PCM_FMTBIT_S32_LE)
+
+
+#endif
-- 
1.7.9.5

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[PATCH v2 2/2] Documentation: dt: bindings: sound: Add bindings file for CS35L32

[Brian Austin]

This patch adds device tree bindings file for the Cirrus Logic CS35L32

Changes for v2:
- Remove Gain Manager from DT and move to driver kcontrol
- Add VP-Supply for regulator

Signed-off-by: Brian Austin <brian.austin-jGc1dHjMKG3QT0dZR+AlfA@public.gmane.org>
---
 .../devicetree/bindings/sound/cs35l32.txt          |   62 ++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/cs35l32.txt

diff --git a/Documentation/devicetree/bindings/sound/cs35l32.txt b/Documentation/devicetree/bindings/sound/cs35l32.txt
new file mode 100644
index 0000000..1417d3f
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/cs35l32.txt
@@ -0,0 +1,62 @@
+CS35L32 audio CODEC
+
+Required properties:
+
+  - compatible : "cirrus,cs35l32"
+
+  - reg : the I2C address of the device for I2C. Address is determined by the level
+  of the AD0 pin. Level 0 is 0x40 while Level 1 is 0x41.
+
+  - VA-supply, VP-supply : power supplies for the device,
+  as covered in Documentation/devicetree/bindings/regulator/regulator.txt.
+
+Optional properties:
+
+  - reset-gpios : a GPIO spec for the reset pin. If specified, it will be
+  deasserted before communication to the codec starts.
+
+  - cirrus,boost-manager : Boost voltage control.
+  0 = Automatically managed.  Boost-converter output voltage is the higher
+  of the two: Class G or adaptive LED voltage.
+  1 = Automatically managed irrespective of audio, adapting for low-power
+  dissipation when LEDs are ON, and operating in Fixed-Boost Bypass Mode
+  if LEDs are OFF (VBST = VP).
+  2 = (Default) Boost voltage fixed in Bypass Mode (VBST = VP).
+  3 = Boost voltage fixed at 5 V.
+
+  - cirrus,sdout-datacfg : Data configuration for dual CS35L32 applications only.
+  Determines the data packed in a two-CS35L32 configuration.
+  0 = Left/right channels VMON[11:0], IMON[11:0], VPMON[7:0].
+  1 = Left/right channels VMON[11:0], IMON[11:0], STATUS.
+  2 = (Default) left/right channels VMON[15:0], IMON [15:0].
+  3 = Left/right channels VPMON[7:0], STATUS.
+
+  - cirrus,sdout-share : SDOUT sharing. Determines whether one or two CS35L32
+  devices are on board sharing SDOUT.
+  0 = (Default) One IC.
+  1 = Two IC's.
+
+  - cirrus,battery-recovery : Low battery nominal recovery threshold, rising VP.
+  0 = 3.1V
+  1 = 3.2V
+  2 = 3.3V (Default)
+  3 = 3.4V
+
+  - cirrus,battery-threshold : Low battery nominal threshold, falling VP.
+  0 = 3.1V
+  1 = 3.2V
+  2 = 3.3V
+  3 = 3.4V (Default)
+  4 = 3.5V
+  5 = 3.6V
+
+Example:
+
+codec: codec@40 {
+	compatible = "cirrus,cs35l32";
+	reg = <0x40>;
+	reset-gpios = <&gpio 10 0>;
+	cirrus,boost-manager = <0x03>;
+	cirrus,sdout-datacfg = <0x02>;
+	VA-supply = <&reg_audio>;
+};
-- 
1.7.9.5

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

[Dinh Nguyen]

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-jGc1dHjMKG3QT0dZR+AlfA@public.gmane.org>
> ---
>  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-jGc1dHjMKG3QT0dZR+AlfA@public.gmane.org>
> + *
> + * 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
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Re: [PATCH v2 1/2] ASoC: Add support for CS35L32 Boosted Amplifier

[Austin, Brian]

> On Aug 2, 2014, at 17:12, "Dinh Nguyen" <dinh.linux-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> 
> 
>> 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-jGc1dHjMKG3QT0dZR+AlfA@public.gmane.org>
>> ---
>> 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-jGc1dHjMKG3QT0dZR+AlfA@public.gmane.org>
>> + *
>> + * 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?
> 
Yes, I can remove this check

>> +        }
>> +    }
>> +
>> +    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

Fair enough.
I'll send a v3 on Monday 

Thanks Dinh
-Brian --
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Re: [PATCH v2 1/2] ASoC: Add support for CS35L32 Boosted Amplifier

[Brian Austin]

On Sat, 2 Aug 2014, Dinh Nguyen wrote:

> 
> 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-jGc1dHjMKG3QT0dZR+AlfA@public.gmane.org>
> > ---

> > +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?
> 
I thought about this and I think I am going to keep this check incase I 
change anything about handle_of_data and would like to check the return 
value. I don't think it causes anything bad to keep it. I always like to  
have this check just in case.

 > > +		}
> > +	}
> > +
> > +	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.

I will change this but related to the regulator in case 
snd_soc_register_codec fails.

Thanks,
Brian
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