From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- sound/soc/codecs/simple-amplifier.c | 110 ++++++++++++++++++++++++++++++++++++ 1 file changed, 110 insertions(+) create mode 100644 sound/soc/codecs/simple-amplifier.c (limited to 'sound/soc/codecs/simple-amplifier.c') diff --git a/sound/soc/codecs/simple-amplifier.c b/sound/soc/codecs/simple-amplifier.c new file mode 100644 index 0000000000..d306c585b5 --- /dev/null +++ b/sound/soc/codecs/simple-amplifier.c @@ -0,0 +1,110 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2017 BayLibre, SAS. + * Author: Jerome Brunet + */ + +#include +#include +#include +#include + +#define DRV_NAME "simple-amplifier" + +struct simple_amp { + struct gpio_desc *gpiod_enable; +}; + +static int drv_event(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *control, int event) +{ + struct snd_soc_component *c = snd_soc_dapm_to_component(w->dapm); + struct simple_amp *priv = snd_soc_component_get_drvdata(c); + int val; + + switch (event) { + case SND_SOC_DAPM_POST_PMU: + val = 1; + break; + case SND_SOC_DAPM_PRE_PMD: + val = 0; + break; + default: + WARN(1, "Unexpected event"); + return -EINVAL; + } + + gpiod_set_value_cansleep(priv->gpiod_enable, val); + + return 0; +} + +static const struct snd_soc_dapm_widget simple_amp_dapm_widgets[] = { + SND_SOC_DAPM_INPUT("INL"), + SND_SOC_DAPM_INPUT("INR"), + SND_SOC_DAPM_OUT_DRV_E("DRV", SND_SOC_NOPM, 0, 0, NULL, 0, drv_event, + (SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD)), + SND_SOC_DAPM_OUTPUT("OUTL"), + SND_SOC_DAPM_OUTPUT("OUTR"), + SND_SOC_DAPM_REGULATOR_SUPPLY("VCC", 20, 0), +}; + +static const struct snd_soc_dapm_route simple_amp_dapm_routes[] = { + { "DRV", NULL, "INL" }, + { "DRV", NULL, "INR" }, + { "OUTL", NULL, "VCC" }, + { "OUTR", NULL, "VCC" }, + { "OUTL", NULL, "DRV" }, + { "OUTR", NULL, "DRV" }, +}; + +static const struct snd_soc_component_driver simple_amp_component_driver = { + .dapm_widgets = simple_amp_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(simple_amp_dapm_widgets), + .dapm_routes = simple_amp_dapm_routes, + .num_dapm_routes = ARRAY_SIZE(simple_amp_dapm_routes), +}; + +static int simple_amp_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct simple_amp *priv; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (priv == NULL) + return -ENOMEM; + platform_set_drvdata(pdev, priv); + + priv->gpiod_enable = devm_gpiod_get_optional(dev, "enable", + GPIOD_OUT_LOW); + if (IS_ERR(priv->gpiod_enable)) + return dev_err_probe(dev, PTR_ERR(priv->gpiod_enable), + "Failed to get 'enable' gpio"); + + return devm_snd_soc_register_component(dev, + &simple_amp_component_driver, + NULL, 0); +} + +#ifdef CONFIG_OF +static const struct of_device_id simple_amp_ids[] = { + { .compatible = "dioo,dio2125", }, + { .compatible = "simple-audio-amplifier", }, + { } +}; +MODULE_DEVICE_TABLE(of, simple_amp_ids); +#endif + +static struct platform_driver simple_amp_driver = { + .driver = { + .name = DRV_NAME, + .of_match_table = of_match_ptr(simple_amp_ids), + }, + .probe = simple_amp_probe, +}; + +module_platform_driver(simple_amp_driver); + +MODULE_DESCRIPTION("ASoC Simple Audio Amplifier driver"); +MODULE_AUTHOR("Jerome Brunet "); +MODULE_LICENSE("GPL"); -- cgit v1.2.3