From aa3b7fcf76967e89e51e547495672b9a88f087c3 Mon Sep 17 00:00:00 2001 From: jonathan Date: Sun, 7 Jun 2020 23:19:31 +0200 Subject: [PATCH 55/78] ASoC: aw8738: Add AW8738 codec driver --- sound/soc/codecs/Kconfig | 5 ++ sound/soc/codecs/Makefile | 2 + sound/soc/codecs/aw8738.c | 105 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 112 insertions(+) create mode 100644 sound/soc/codecs/aw8738.c diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig index 87968e9d1..7a3a824b3 100644 --- a/sound/soc/codecs/Kconfig +++ b/sound/soc/codecs/Kconfig @@ -50,6 +50,7 @@ config SND_SOC_ALL_CODECS imply SND_SOC_AK5558 imply SND_SOC_ALC5623 imply SND_SOC_ALC5632 + imply SND_SOC_AW8738 imply SND_SOC_BT_SCO imply SND_SOC_BD28623 imply SND_SOC_CQ0093VC @@ -525,6 +526,10 @@ config SND_SOC_ALC5632 tristate depends on I2C +config SND_SOC_AW8738 + tristate "Awinic AW8738 CODEC" + depends on GPIOLIB + config SND_SOC_BD28623 tristate "ROHM BD28623 CODEC" help diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile index d7ad2ee9b..22871e826 100644 --- a/sound/soc/codecs/Makefile +++ b/sound/soc/codecs/Makefile @@ -41,6 +41,7 @@ snd-soc-ak4671-objs := ak4671.o snd-soc-ak5386-objs := ak5386.o snd-soc-ak5558-objs := ak5558.o snd-soc-arizona-objs := arizona.o +snd-soc-aw8738-objs := aw8738.o snd-soc-bd28623-objs := bd28623.o snd-soc-bt-sco-objs := bt-sco.o snd-soc-cpcap-objs := cpcap.o @@ -352,6 +353,7 @@ obj-$(CONFIG_SND_SOC_ALC5623) += snd-soc-alc5623.o obj-$(CONFIG_SND_SOC_ALC5632) += snd-soc-alc5632.o obj-$(CONFIG_SND_SOC_ARIZONA) += snd-soc-arizona.o obj-$(CONFIG_SND_SOC_BD28623) += snd-soc-bd28623.o +obj-$(CONFIG_SND_SOC_AW8738) += snd-soc-aw8738.o obj-$(CONFIG_SND_SOC_BT_SCO) += snd-soc-bt-sco.o obj-$(CONFIG_SND_SOC_CQ0093VC) += snd-soc-cq93vc.o obj-$(CONFIG_SND_SOC_CPCAP) += snd-soc-cpcap.o diff --git a/sound/soc/codecs/aw8738.c b/sound/soc/codecs/aw8738.c new file mode 100644 index 000000000..a1861b502 --- /dev/null +++ b/sound/soc/codecs/aw8738.c @@ -0,0 +1,105 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include +#include +#include +#include + +struct aw8738_priv { + struct gpio_desc *enable_gpio; + unsigned int mode; +}; + +static int aw8738_drv_event(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *kcontrol, int event) +{ + struct snd_soc_component *comp = snd_soc_dapm_to_component(w->dapm); + struct aw8738_priv *aw8738 = snd_soc_component_get_drvdata(comp); + int i; + + switch (event) { + case SND_SOC_DAPM_POST_PMU: + for (i = 0; i < aw8738->mode; i++) { + gpiod_set_value_cansleep(aw8738->enable_gpio, 0); + udelay(2); + gpiod_set_value_cansleep(aw8738->enable_gpio, 1); + udelay(2); + } + + msleep(40); + break; + case SND_SOC_DAPM_PRE_PMD: + gpiod_set_value_cansleep(aw8738->enable_gpio, 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 aw8738_priv *aw8738; + int ret; + + aw8738 = devm_kzalloc(&pdev->dev, sizeof(*aw8738), GFP_KERNEL); + if (!aw8738) + return -ENOMEM; + + aw8738->enable_gpio = devm_gpiod_get(&pdev->dev, "enable", GPIOD_OUT_LOW); + if (IS_ERR(aw8738->enable_gpio)) + return PTR_ERR(aw8738->enable_gpio); + + ret = device_property_read_u32(&pdev->dev, "aw8738,mode", &aw8738->mode); + if (ret) + return -EINVAL; + + dev_set_drvdata(&pdev->dev, aw8738); + + return devm_snd_soc_register_component(&pdev->dev, + &aw8738_component_driver, + NULL, 0); +} + +#ifdef CONFIG_OF +static const struct of_device_id aw8738_device_id[] = { + { .compatible = "awinic,aw8738" }, + { } +}; +MODULE_DEVICE_TABLE(of, aw8738_device_id); +#endif + +static struct platform_driver aw8738_driver = { + .driver = { + .name = "aw8738", + .of_match_table = of_match_ptr(aw8738_device_id), + }, + .probe = aw8738_probe, +}; +module_platform_driver(aw8738_driver); + +MODULE_DESCRIPTION("Awinic AW8738 Amplifier Driver"); +MODULE_LICENSE("GPL v2"); -- 2.31.1