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/aw8738.c | 104 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 104 insertions(+) create mode 100644 sound/soc/codecs/aw8738.c (limited to 'sound/soc/codecs/aw8738.c') diff --git a/sound/soc/codecs/aw8738.c b/sound/soc/codecs/aw8738.c new file mode 100644 index 0000000000..0fe8af1603 --- /dev/null +++ b/sound/soc/codecs/aw8738.c @@ -0,0 +1,104 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include +#include +#include +#include + +struct aw8738_priv { + struct gpio_desc *gpiod_mode; + unsigned int mode; +}; + +static int aw8738_drv_event(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *kcontrol, int event) +{ + struct snd_soc_component *c = snd_soc_dapm_to_component(w->dapm); + struct aw8738_priv *aw = snd_soc_component_get_drvdata(c); + int i; + + switch (event) { + case SND_SOC_DAPM_POST_PMU: + for (i = 0; i < aw->mode; i++) { + gpiod_set_value_cansleep(aw->gpiod_mode, 0); + udelay(2); + gpiod_set_value_cansleep(aw->gpiod_mode, 1); + udelay(2); + } + msleep(40); + break; + case SND_SOC_DAPM_PRE_PMD: + gpiod_set_value_cansleep(aw->gpiod_mode, 0); + usleep_range(1000, 2000); + break; + default: + WARN(1, "Unexpected event"); + return -EINVAL; + } + + return 0; +} + +static const struct snd_soc_dapm_widget aw8738_dapm_widgets[] = { + SND_SOC_DAPM_INPUT("IN"), + SND_SOC_DAPM_OUT_DRV_E("DRV", SND_SOC_NOPM, 0, 0, NULL, 0, aw8738_drv_event, + SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), + SND_SOC_DAPM_OUTPUT("OUT"), +}; + +static const struct snd_soc_dapm_route aw8738_dapm_routes[] = { + { "DRV", NULL, "IN" }, + { "OUT", NULL, "DRV" }, +}; + +static const struct snd_soc_component_driver aw8738_component_driver = { + .dapm_widgets = aw8738_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(aw8738_dapm_widgets), + .dapm_routes = aw8738_dapm_routes, + .num_dapm_routes = ARRAY_SIZE(aw8738_dapm_routes), +}; + +static int aw8738_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct aw8738_priv *aw; + int ret; + + aw = devm_kzalloc(dev, sizeof(*aw), GFP_KERNEL); + if (!aw) + return -ENOMEM; + platform_set_drvdata(pdev, aw); + + aw->gpiod_mode = devm_gpiod_get(dev, "mode", GPIOD_OUT_LOW); + if (IS_ERR(aw->gpiod_mode)) + return dev_err_probe(dev, PTR_ERR(aw->gpiod_mode), + "Failed to get 'mode' gpio"); + + ret = device_property_read_u32(dev, "awinic,mode", &aw->mode); + if (ret) + return -EINVAL; + + return devm_snd_soc_register_component(&pdev->dev, + &aw8738_component_driver, + NULL, 0); +} + +#ifdef CONFIG_OF +static const struct of_device_id aw8738_of_match[] = { + { .compatible = "awinic,aw8738" }, + { } +}; +MODULE_DEVICE_TABLE(of, aw8738_of_match); +#endif + +static struct platform_driver aw8738_driver = { + .probe = aw8738_probe, + .driver = { + .name = "aw8738", + .of_match_table = of_match_ptr(aw8738_of_match), + }, +}; +module_platform_driver(aw8738_driver); + +MODULE_DESCRIPTION("Awinic AW8738 Amplifier Driver"); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3