mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-08-09 06:14:34 +02:00
Uwe Kleine-König (The Capable Hub)andMark Brown
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>
233 lines
6.3 KiB
C
233 lines
6.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* MAX9768 AMP driver
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*
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* Copyright (C) 2011, 2012 by Wolfram Sang, Pengutronix e.K.
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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/slab.h>
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#include <linux/gpio/consumer.h>
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#include <linux/regmap.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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#include <sound/max9768.h>
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/* "Registers" */
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#define MAX9768_VOL 0
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#define MAX9768_CTRL 3
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/* Commands */
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#define MAX9768_CTRL_PWM 0x15
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#define MAX9768_CTRL_FILTERLESS 0x16
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struct max9768 {
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struct regmap *regmap;
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struct gpio_desc *mute;
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struct gpio_desc *shdn;
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u32 flags;
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};
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static const struct reg_default max9768_default_regs[] = {
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{ 0, 0 },
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{ 3, MAX9768_CTRL_FILTERLESS},
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};
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static int max9768_get_gpio(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_soc_component *c = snd_kcontrol_chip(kcontrol);
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struct max9768 *max9768 = snd_soc_component_get_drvdata(c);
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int val = gpiod_get_value_cansleep(max9768->mute);
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ucontrol->value.integer.value[0] = !val;
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return 0;
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}
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static int max9768_set_gpio(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_soc_component *c = snd_kcontrol_chip(kcontrol);
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struct max9768 *max9768 = snd_soc_component_get_drvdata(c);
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bool val = !ucontrol->value.integer.value[0];
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int ret;
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if (val != gpiod_get_value_cansleep(max9768->mute))
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ret = 1;
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else
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ret = 0;
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gpiod_set_value_cansleep(max9768->mute, val);
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return ret;
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}
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static const DECLARE_TLV_DB_RANGE(volume_tlv,
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0, 0, TLV_DB_SCALE_ITEM(-16150, 0, 0),
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1, 1, TLV_DB_SCALE_ITEM(-9280, 0, 0),
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2, 2, TLV_DB_SCALE_ITEM(-9030, 0, 0),
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3, 3, TLV_DB_SCALE_ITEM(-8680, 0, 0),
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4, 4, TLV_DB_SCALE_ITEM(-8430, 0, 0),
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5, 5, TLV_DB_SCALE_ITEM(-8080, 0, 0),
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6, 6, TLV_DB_SCALE_ITEM(-7830, 0, 0),
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7, 7, TLV_DB_SCALE_ITEM(-7470, 0, 0),
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8, 8, TLV_DB_SCALE_ITEM(-7220, 0, 0),
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9, 9, TLV_DB_SCALE_ITEM(-6870, 0, 0),
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10, 10, TLV_DB_SCALE_ITEM(-6620, 0, 0),
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11, 11, TLV_DB_SCALE_ITEM(-6270, 0, 0),
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12, 12, TLV_DB_SCALE_ITEM(-6020, 0, 0),
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13, 13, TLV_DB_SCALE_ITEM(-5670, 0, 0),
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14, 14, TLV_DB_SCALE_ITEM(-5420, 0, 0),
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15, 17, TLV_DB_SCALE_ITEM(-5060, 250, 0),
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18, 18, TLV_DB_SCALE_ITEM(-4370, 0, 0),
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19, 19, TLV_DB_SCALE_ITEM(-4210, 0, 0),
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20, 20, TLV_DB_SCALE_ITEM(-3960, 0, 0),
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21, 21, TLV_DB_SCALE_ITEM(-3760, 0, 0),
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22, 22, TLV_DB_SCALE_ITEM(-3600, 0, 0),
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23, 23, TLV_DB_SCALE_ITEM(-3340, 0, 0),
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24, 24, TLV_DB_SCALE_ITEM(-3150, 0, 0),
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25, 25, TLV_DB_SCALE_ITEM(-2980, 0, 0),
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26, 26, TLV_DB_SCALE_ITEM(-2720, 0, 0),
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27, 27, TLV_DB_SCALE_ITEM(-2520, 0, 0),
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28, 30, TLV_DB_SCALE_ITEM(-2350, 190, 0),
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31, 31, TLV_DB_SCALE_ITEM(-1750, 0, 0),
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32, 34, TLV_DB_SCALE_ITEM(-1640, 100, 0),
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35, 37, TLV_DB_SCALE_ITEM(-1310, 110, 0),
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38, 39, TLV_DB_SCALE_ITEM(-990, 100, 0),
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40, 40, TLV_DB_SCALE_ITEM(-710, 0, 0),
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41, 41, TLV_DB_SCALE_ITEM(-600, 0, 0),
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42, 42, TLV_DB_SCALE_ITEM(-500, 0, 0),
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43, 43, TLV_DB_SCALE_ITEM(-340, 0, 0),
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44, 44, TLV_DB_SCALE_ITEM(-190, 0, 0),
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45, 45, TLV_DB_SCALE_ITEM(-50, 0, 0),
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46, 46, TLV_DB_SCALE_ITEM(50, 0, 0),
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47, 50, TLV_DB_SCALE_ITEM(120, 40, 0),
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51, 57, TLV_DB_SCALE_ITEM(290, 50, 0),
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58, 58, TLV_DB_SCALE_ITEM(650, 0, 0),
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59, 62, TLV_DB_SCALE_ITEM(700, 60, 0),
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63, 63, TLV_DB_SCALE_ITEM(950, 0, 0)
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);
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static const struct snd_kcontrol_new max9768_volume[] = {
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SOC_SINGLE_TLV("Playback Volume", MAX9768_VOL, 0, 63, 0, volume_tlv),
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};
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static const struct snd_kcontrol_new max9768_mute[] = {
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SOC_SINGLE_BOOL_EXT("Playback Switch", 0, max9768_get_gpio, max9768_set_gpio),
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};
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static const struct snd_soc_dapm_widget max9768_dapm_widgets[] = {
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SND_SOC_DAPM_INPUT("IN"),
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SND_SOC_DAPM_OUTPUT("OUT+"),
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SND_SOC_DAPM_OUTPUT("OUT-"),
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};
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static const struct snd_soc_dapm_route max9768_dapm_routes[] = {
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{ "OUT+", NULL, "IN" },
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{ "OUT-", NULL, "IN" },
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};
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static int max9768_probe(struct snd_soc_component *component)
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{
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struct max9768 *max9768 = snd_soc_component_get_drvdata(component);
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int ret;
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if (max9768->flags & MAX9768_FLAG_CLASSIC_PWM) {
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ret = regmap_write(max9768->regmap, MAX9768_CTRL,
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MAX9768_CTRL_PWM);
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if (ret)
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return ret;
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}
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if (max9768->mute) {
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ret = snd_soc_add_component_controls(component, max9768_mute,
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ARRAY_SIZE(max9768_mute));
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if (ret)
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return ret;
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}
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return 0;
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}
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static const struct snd_soc_component_driver max9768_component_driver = {
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.probe = max9768_probe,
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.controls = max9768_volume,
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.num_controls = ARRAY_SIZE(max9768_volume),
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.dapm_widgets = max9768_dapm_widgets,
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.num_dapm_widgets = ARRAY_SIZE(max9768_dapm_widgets),
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.dapm_routes = max9768_dapm_routes,
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.num_dapm_routes = ARRAY_SIZE(max9768_dapm_routes),
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};
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static const struct regmap_config max9768_i2c_regmap_config = {
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.reg_bits = 2,
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.val_bits = 6,
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.max_register = 3,
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.reg_defaults = max9768_default_regs,
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.num_reg_defaults = ARRAY_SIZE(max9768_default_regs),
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.cache_type = REGCACHE_RBTREE,
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};
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static int max9768_i2c_probe(struct i2c_client *client)
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{
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struct max9768 *max9768;
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struct max9768_pdata *pdata = client->dev.platform_data;
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max9768 = devm_kzalloc(&client->dev, sizeof(*max9768), GFP_KERNEL);
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if (!max9768)
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return -ENOMEM;
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/* Mute on powerup to avoid clicks */
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max9768->mute = devm_gpiod_get_optional(&client->dev,
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"mute",
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GPIOD_OUT_HIGH);
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if (IS_ERR(max9768->mute))
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return PTR_ERR(max9768->mute);
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gpiod_set_consumer_name(max9768->mute, "MAX9768 Mute");
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/* Activate chip by releasing shutdown, enables I2C */
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max9768->shdn = devm_gpiod_get_optional(&client->dev,
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"shutdown",
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GPIOD_OUT_HIGH);
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if (IS_ERR(max9768->shdn))
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return PTR_ERR(max9768->shdn);
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gpiod_set_consumer_name(max9768->shdn, "MAX9768 Shutdown");
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if (pdata)
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max9768->flags = pdata->flags;
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i2c_set_clientdata(client, max9768);
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max9768->regmap = devm_regmap_init_i2c(client, &max9768_i2c_regmap_config);
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if (IS_ERR(max9768->regmap))
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return PTR_ERR(max9768->regmap);
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return devm_snd_soc_register_component(&client->dev,
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&max9768_component_driver, NULL, 0);
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}
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static const struct i2c_device_id max9768_i2c_id[] = {
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{ .name = "max9768" },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, max9768_i2c_id);
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static struct i2c_driver max9768_i2c_driver = {
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.driver = {
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.name = "max9768",
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},
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.probe = max9768_i2c_probe,
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.id_table = max9768_i2c_id,
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};
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module_i2c_driver(max9768_i2c_driver);
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MODULE_AUTHOR("Wolfram Sang <kernel@pengutronix.de>");
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MODULE_DESCRIPTION("ASoC MAX9768 amplifier driver");
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MODULE_LICENSE("GPL v2");
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