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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * LM4857 AMP driver4 *5 * Copyright 2007 Wolfson Microelectronics PLC.6 * Author: Graeme Gregory7 * graeme.gregory@wolfsonmicro.com8 * Copyright 2011 Lars-Peter Clausen <lars@metafoo.de>9 */10 11#include <linux/init.h>12#include <linux/module.h>13#include <linux/i2c.h>14#include <linux/regmap.h>15#include <linux/slab.h>16 17#include <sound/core.h>18#include <sound/soc.h>19#include <sound/tlv.h>20 21static const struct reg_default lm4857_default_regs[] = {22 { 0x0, 0x00 },23 { 0x1, 0x00 },24 { 0x2, 0x00 },25 { 0x3, 0x00 },26};27 28/* The register offsets in the cache array */29#define LM4857_MVOL 030#define LM4857_LVOL 131#define LM4857_RVOL 232#define LM4857_CTRL 333 34/* the shifts required to set these bits */35#define LM4857_3D 536#define LM4857_WAKEUP 537#define LM4857_EPGAIN 438 39static const unsigned int lm4857_mode_values[] = {40 0,41 6,42 7,43 8,44 9,45};46 47static const char * const lm4857_mode_texts[] = {48 "Off",49 "Earpiece",50 "Loudspeaker",51 "Loudspeaker + Headphone",52 "Headphone",53};54 55static SOC_VALUE_ENUM_SINGLE_AUTODISABLE_DECL(lm4857_mode_enum,56 LM4857_CTRL, 0, 0xf, lm4857_mode_texts, lm4857_mode_values);57 58static const struct snd_kcontrol_new lm4857_mode_ctrl =59 SOC_DAPM_ENUM("Mode", lm4857_mode_enum);60 61static const struct snd_soc_dapm_widget lm4857_dapm_widgets[] = {62 SND_SOC_DAPM_INPUT("IN"),63 64 SND_SOC_DAPM_DEMUX("Mode", SND_SOC_NOPM, 0, 0, &lm4857_mode_ctrl),65 66 SND_SOC_DAPM_OUTPUT("LS"),67 SND_SOC_DAPM_OUTPUT("HP"),68 SND_SOC_DAPM_OUTPUT("EP"),69};70 71static const DECLARE_TLV_DB_SCALE(stereo_tlv, -4050, 150, 0);72static const DECLARE_TLV_DB_SCALE(mono_tlv, -3450, 150, 0);73 74static const struct snd_kcontrol_new lm4857_controls[] = {75 SOC_SINGLE_TLV("Left Playback Volume", LM4857_LVOL, 0, 31, 0,76 stereo_tlv),77 SOC_SINGLE_TLV("Right Playback Volume", LM4857_RVOL, 0, 31, 0,78 stereo_tlv),79 SOC_SINGLE_TLV("Mono Playback Volume", LM4857_MVOL, 0, 31, 0,80 mono_tlv),81 SOC_SINGLE("Spk 3D Playback Switch", LM4857_LVOL, LM4857_3D, 1, 0),82 SOC_SINGLE("HP 3D Playback Switch", LM4857_RVOL, LM4857_3D, 1, 0),83 SOC_SINGLE("Fast Wakeup Playback Switch", LM4857_CTRL,84 LM4857_WAKEUP, 1, 0),85 SOC_SINGLE("Earpiece 6dB Playback Switch", LM4857_CTRL,86 LM4857_EPGAIN, 1, 0),87};88 89static const struct snd_soc_dapm_route lm4857_routes[] = {90 { "Mode", NULL, "IN" },91 { "LS", "Loudspeaker", "Mode" },92 { "LS", "Loudspeaker + Headphone", "Mode" },93 { "HP", "Headphone", "Mode" },94 { "HP", "Loudspeaker + Headphone", "Mode" },95 { "EP", "Earpiece", "Mode" },96};97 98static const struct snd_soc_component_driver lm4857_component_driver = {99 .controls = lm4857_controls,100 .num_controls = ARRAY_SIZE(lm4857_controls),101 .dapm_widgets = lm4857_dapm_widgets,102 .num_dapm_widgets = ARRAY_SIZE(lm4857_dapm_widgets),103 .dapm_routes = lm4857_routes,104 .num_dapm_routes = ARRAY_SIZE(lm4857_routes),105};106 107static const struct regmap_config lm4857_regmap_config = {108 .val_bits = 6,109 .reg_bits = 2,110 111 .max_register = LM4857_CTRL,112 113 .cache_type = REGCACHE_FLAT,114 .reg_defaults = lm4857_default_regs,115 .num_reg_defaults = ARRAY_SIZE(lm4857_default_regs),116};117 118static int lm4857_i2c_probe(struct i2c_client *i2c)119{120 struct regmap *regmap;121 122 regmap = devm_regmap_init_i2c(i2c, &lm4857_regmap_config);123 if (IS_ERR(regmap))124 return PTR_ERR(regmap);125 126 return devm_snd_soc_register_component(&i2c->dev,127 &lm4857_component_driver, NULL, 0);128}129 130static const struct i2c_device_id lm4857_i2c_id[] = {131 { "lm4857" },132 { }133};134MODULE_DEVICE_TABLE(i2c, lm4857_i2c_id);135 136static struct i2c_driver lm4857_i2c_driver = {137 .driver = {138 .name = "lm4857",139 },140 .probe = lm4857_i2c_probe,141 .id_table = lm4857_i2c_id,142};143 144module_i2c_driver(lm4857_i2c_driver);145 146MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");147MODULE_DESCRIPTION("LM4857 amplifier driver");148MODULE_LICENSE("GPL");149