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910714d4e7
While being less compact, using named initializers allows to more easily see which members of the structs are assigned which value without having to lookup the declaration of the struct. And it's also more robust against changes to the struct definition. The mentioned robustness is relevant for a planned change to struct i2c_device_id that replaces .driver_data by an anonymous union. While touching all these arrays, unify indention and usage of commas. This patch doesn't modify the compiled arrays, only their representation in source form benefits. The former was confirmed with x86 and arm64 builds. Signed-off-by: Uwe Kleine-König (The Capable Hub) <u.kleine-koenig@baylibre.com> Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com> Reviewed-by: Linus Walleij <linusw@kernel.org> Link: https://patch.msgid.link/ae2ff4898eb340bd8bcafb7b75443eb4a0ce3e76.1778692164.git.u.kleine-koenig@baylibre.com Signed-off-by: Mark Brown <broonie@kernel.org>
149 lines
3.7 KiB
C
149 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* LM4857 AMP driver
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*
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* Copyright 2007 Wolfson Microelectronics PLC.
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* Author: Graeme Gregory
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* graeme.gregory@wolfsonmicro.com
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* Copyright 2011 Lars-Peter Clausen <lars@metafoo.de>
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/i2c.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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#include <sound/core.h>
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#include <sound/soc.h>
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#include <sound/tlv.h>
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static const struct reg_default lm4857_default_regs[] = {
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{ 0x0, 0x00 },
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{ 0x1, 0x00 },
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{ 0x2, 0x00 },
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{ 0x3, 0x00 },
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};
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/* The register offsets in the cache array */
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#define LM4857_MVOL 0
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#define LM4857_LVOL 1
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#define LM4857_RVOL 2
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#define LM4857_CTRL 3
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/* the shifts required to set these bits */
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#define LM4857_3D 5
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#define LM4857_WAKEUP 5
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#define LM4857_EPGAIN 4
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static const unsigned int lm4857_mode_values[] = {
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0,
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6,
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7,
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8,
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9,
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};
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static const char * const lm4857_mode_texts[] = {
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"Off",
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"Earpiece",
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"Loudspeaker",
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"Loudspeaker + Headphone",
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"Headphone",
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};
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static SOC_VALUE_ENUM_SINGLE_AUTODISABLE_DECL(lm4857_mode_enum,
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LM4857_CTRL, 0, 0xf, lm4857_mode_texts, lm4857_mode_values);
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static const struct snd_kcontrol_new lm4857_mode_ctrl =
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SOC_DAPM_ENUM("Mode", lm4857_mode_enum);
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static const struct snd_soc_dapm_widget lm4857_dapm_widgets[] = {
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SND_SOC_DAPM_INPUT("IN"),
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SND_SOC_DAPM_DEMUX("Mode", SND_SOC_NOPM, 0, 0, &lm4857_mode_ctrl),
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SND_SOC_DAPM_OUTPUT("LS"),
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SND_SOC_DAPM_OUTPUT("HP"),
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SND_SOC_DAPM_OUTPUT("EP"),
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};
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static const DECLARE_TLV_DB_SCALE(stereo_tlv, -4050, 150, 0);
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static const DECLARE_TLV_DB_SCALE(mono_tlv, -3450, 150, 0);
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static const struct snd_kcontrol_new lm4857_controls[] = {
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SOC_SINGLE_TLV("Left Playback Volume", LM4857_LVOL, 0, 31, 0,
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stereo_tlv),
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SOC_SINGLE_TLV("Right Playback Volume", LM4857_RVOL, 0, 31, 0,
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stereo_tlv),
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SOC_SINGLE_TLV("Mono Playback Volume", LM4857_MVOL, 0, 31, 0,
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mono_tlv),
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SOC_SINGLE("Spk 3D Playback Switch", LM4857_LVOL, LM4857_3D, 1, 0),
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SOC_SINGLE("HP 3D Playback Switch", LM4857_RVOL, LM4857_3D, 1, 0),
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SOC_SINGLE("Fast Wakeup Playback Switch", LM4857_CTRL,
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LM4857_WAKEUP, 1, 0),
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SOC_SINGLE("Earpiece 6dB Playback Switch", LM4857_CTRL,
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LM4857_EPGAIN, 1, 0),
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};
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static const struct snd_soc_dapm_route lm4857_routes[] = {
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{ "Mode", NULL, "IN" },
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{ "LS", "Loudspeaker", "Mode" },
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{ "LS", "Loudspeaker + Headphone", "Mode" },
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{ "HP", "Headphone", "Mode" },
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{ "HP", "Loudspeaker + Headphone", "Mode" },
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{ "EP", "Earpiece", "Mode" },
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};
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static const struct snd_soc_component_driver lm4857_component_driver = {
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.controls = lm4857_controls,
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.num_controls = ARRAY_SIZE(lm4857_controls),
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.dapm_widgets = lm4857_dapm_widgets,
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.num_dapm_widgets = ARRAY_SIZE(lm4857_dapm_widgets),
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.dapm_routes = lm4857_routes,
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.num_dapm_routes = ARRAY_SIZE(lm4857_routes),
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};
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static const struct regmap_config lm4857_regmap_config = {
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.val_bits = 6,
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.reg_bits = 2,
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.max_register = LM4857_CTRL,
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.cache_type = REGCACHE_FLAT,
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.reg_defaults = lm4857_default_regs,
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.num_reg_defaults = ARRAY_SIZE(lm4857_default_regs),
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};
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static int lm4857_i2c_probe(struct i2c_client *i2c)
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{
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struct regmap *regmap;
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regmap = devm_regmap_init_i2c(i2c, &lm4857_regmap_config);
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if (IS_ERR(regmap))
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return PTR_ERR(regmap);
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return devm_snd_soc_register_component(&i2c->dev,
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&lm4857_component_driver, NULL, 0);
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}
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static const struct i2c_device_id lm4857_i2c_id[] = {
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{ .name = "lm4857" },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, lm4857_i2c_id);
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static struct i2c_driver lm4857_i2c_driver = {
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.driver = {
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.name = "lm4857",
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},
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.probe = lm4857_i2c_probe,
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.id_table = lm4857_i2c_id,
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};
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module_i2c_driver(lm4857_i2c_driver);
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MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
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MODULE_DESCRIPTION("LM4857 amplifier driver");
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MODULE_LICENSE("GPL");
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