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1// SPDX-License-Identifier: GPL-2.0-only2//3// rt1015p.c -- RT1015P ALSA SoC audio amplifier driver4//5// Copyright 2020 The Linux Foundation. All rights reserved.6 7#include <linux/acpi.h>8#include <linux/delay.h>9#include <linux/device.h>10#include <linux/err.h>11#include <linux/gpio/consumer.h>12#include <linux/kernel.h>13#include <linux/module.h>14#include <linux/of.h>15#include <linux/platform_device.h>16#include <sound/pcm.h>17#include <sound/soc.h>18#include <sound/soc-dai.h>19#include <sound/soc-dapm.h>20 21struct rt1015p_priv {22 struct gpio_desc *sdb;23 bool calib_done;24};25 26static int rt1015p_sdb_event(struct snd_soc_dapm_widget *w,27 struct snd_kcontrol *kcontrol, int event)28{29 struct snd_soc_component *component =30 snd_soc_dapm_to_component(w->dapm);31 struct rt1015p_priv *rt1015p =32 snd_soc_component_get_drvdata(component);33 34 if (!rt1015p->sdb)35 return 0;36 37 switch (event) {38 case SND_SOC_DAPM_PRE_PMU:39 gpiod_set_value_cansleep(rt1015p->sdb, 1);40 dev_dbg(component->dev, "set sdb to 1");41 42 if (!rt1015p->calib_done) {43 msleep(300);44 rt1015p->calib_done = true;45 }46 break;47 case SND_SOC_DAPM_POST_PMD:48 gpiod_set_value_cansleep(rt1015p->sdb, 0);49 dev_dbg(component->dev, "set sdb to 0");50 break;51 default:52 break;53 }54 55 return 0;56}57 58static const struct snd_soc_dapm_widget rt1015p_dapm_widgets[] = {59 SND_SOC_DAPM_OUTPUT("Speaker"),60 SND_SOC_DAPM_OUT_DRV_E("SDB", SND_SOC_NOPM, 0, 0, NULL, 0,61 rt1015p_sdb_event,62 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),63};64 65static const struct snd_soc_dapm_route rt1015p_dapm_routes[] = {66 {"SDB", NULL, "HiFi Playback"},67 {"Speaker", NULL, "SDB"},68};69 70#ifdef CONFIG_PM71static int rt1015p_suspend(struct snd_soc_component *component)72{73 struct rt1015p_priv *rt1015p = snd_soc_component_get_drvdata(component);74 75 rt1015p->calib_done = false;76 return 0;77}78#else79#define rt1015p_suspend NULL80#endif81 82static const struct snd_soc_component_driver rt1015p_component_driver = {83 .suspend = rt1015p_suspend,84 .dapm_widgets = rt1015p_dapm_widgets,85 .num_dapm_widgets = ARRAY_SIZE(rt1015p_dapm_widgets),86 .dapm_routes = rt1015p_dapm_routes,87 .num_dapm_routes = ARRAY_SIZE(rt1015p_dapm_routes),88 .idle_bias_on = 1,89 .use_pmdown_time = 1,90 .endianness = 1,91};92 93static struct snd_soc_dai_driver rt1015p_dai_driver = {94 .name = "HiFi",95 .playback = {96 .stream_name = "HiFi Playback",97 .formats = SNDRV_PCM_FMTBIT_S24 |98 SNDRV_PCM_FMTBIT_S32,99 .rates = SNDRV_PCM_RATE_48000,100 .channels_min = 1,101 .channels_max = 2,102 },103};104 105static int rt1015p_platform_probe(struct platform_device *pdev)106{107 struct rt1015p_priv *rt1015p;108 109 rt1015p = devm_kzalloc(&pdev->dev, sizeof(*rt1015p), GFP_KERNEL);110 if (!rt1015p)111 return -ENOMEM;112 113 rt1015p->sdb = devm_gpiod_get_optional(&pdev->dev,114 "sdb", GPIOD_OUT_LOW);115 if (IS_ERR(rt1015p->sdb))116 return PTR_ERR(rt1015p->sdb);117 118 dev_set_drvdata(&pdev->dev, rt1015p);119 120 return devm_snd_soc_register_component(&pdev->dev,121 &rt1015p_component_driver,122 &rt1015p_dai_driver, 1);123}124 125#ifdef CONFIG_OF126static const struct of_device_id rt1015p_device_id[] = {127 { .compatible = "realtek,rt1015p" },128 { .compatible = "realtek,rt1019p" },129 {}130};131MODULE_DEVICE_TABLE(of, rt1015p_device_id);132#endif133 134#ifdef CONFIG_ACPI135static const struct acpi_device_id rt1015p_acpi_match[] = {136 { "RTL1015", 0},137 { "RTL1019", 0},138 { },139};140MODULE_DEVICE_TABLE(acpi, rt1015p_acpi_match);141#endif142 143static struct platform_driver rt1015p_platform_driver = {144 .driver = {145 .name = "rt1015p",146 .of_match_table = of_match_ptr(rt1015p_device_id),147 .acpi_match_table = ACPI_PTR(rt1015p_acpi_match),148 },149 .probe = rt1015p_platform_probe,150};151module_platform_driver(rt1015p_platform_driver);152 153MODULE_DESCRIPTION("ASoC RT1015P driver");154MODULE_LICENSE("GPL v2");155