From: Alvin Šipraga Date: Wed, 10 Sep 2025 09:34:06 +0000 (+0200) Subject: ASoC: codecs: pcm1754: add pcm1754 dac driver X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=1217b573978482ae7d21dc5c0bf5aa5007b24f90;p=users%2Fhch%2Fmisc.git ASoC: codecs: pcm1754: add pcm1754 dac driver The Texas Instruments PCM1754[1] is a simple stereo DAC without any digital management interface but soft mute, PCM input format and 44.1 kHz digital de-emphasis can be configured via strapping pins. Only soft mute and PCM input format selection is currently exposed via optional GPIOs in the driver. [1]: https://www.ti.com/product/PCM1754 Signed-off-by: Alvin Šipraga Co-developed-by: Stefan Kerkmann Signed-off-by: Stefan Kerkmann Link: https://patch.msgid.link/20250910-v6-12-topic-pcm1754-v2-2-0917dbe73c65@pengutronix.de Signed-off-by: Mark Brown --- diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig index 6d7e4725d89c..423cc02f76bc 100644 --- a/sound/soc/codecs/Kconfig +++ b/sound/soc/codecs/Kconfig @@ -177,6 +177,7 @@ config SND_SOC_ALL_CODECS imply SND_SOC_NAU8825 imply SND_SOC_HDMI_CODEC imply SND_SOC_PCM1681 + imply SND_SOC_PCM1754 imply SND_SOC_PCM1789_I2C imply SND_SOC_PCM179X_I2C imply SND_SOC_PCM179X_SPI @@ -1426,6 +1427,10 @@ config SND_SOC_PCM1681 tristate "Texas Instruments PCM1681 CODEC" depends on I2C +config SND_SOC_PCM1754 + tristate "Texas Instruments PCM1754 CODEC" + depends on GPIOLIB + config SND_SOC_PCM1789 tristate diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile index a68c3d192a1b..af177e271dda 100644 --- a/sound/soc/codecs/Makefile +++ b/sound/soc/codecs/Makefile @@ -201,6 +201,7 @@ snd-soc-ntp8918-y := ntp8918.o snd-soc-ntpfw-y := ntpfw.o snd-soc-hdmi-codec-y := hdmi-codec.o snd-soc-pcm1681-y := pcm1681.o +snd-soc-pcm1754-y := pcm1754.o snd-soc-pcm1789-codec-y := pcm1789.o snd-soc-pcm1789-i2c-y := pcm1789-i2c.o snd-soc-pcm179x-codec-y := pcm179x.o @@ -621,6 +622,7 @@ obj-$(CONFIG_SND_SOC_NTP8918) += snd-soc-ntp8918.o obj-$(CONFIG_SND_SOC_NTPFW) += snd-soc-ntpfw.o obj-$(CONFIG_SND_SOC_HDMI_CODEC) += snd-soc-hdmi-codec.o obj-$(CONFIG_SND_SOC_PCM1681) += snd-soc-pcm1681.o +obj-$(CONFIG_SND_SOC_PCM1754) += snd-soc-pcm1754.o obj-$(CONFIG_SND_SOC_PCM179X) += snd-soc-pcm179x-codec.o obj-$(CONFIG_SND_SOC_PCM1789_I2C) += snd-soc-pcm1789-i2c.o obj-$(CONFIG_SND_SOC_PCM1789) += snd-soc-pcm1789-codec.o diff --git a/sound/soc/codecs/pcm1754.c b/sound/soc/codecs/pcm1754.c new file mode 100644 index 000000000000..b68a528000be --- /dev/null +++ b/sound/soc/codecs/pcm1754.c @@ -0,0 +1,185 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * PCM1754 DAC ASoC codec driver + * + * Copyright (c) 2022 Alvin Å ipraga + * Copyright (c) 2025 Stefan Kerkmann + */ + +#include +#include +#include + +#include +#include + +struct pcm1754_priv { + unsigned int format; + struct gpio_desc *gpiod_mute; + struct gpio_desc *gpiod_format; +}; + +static int pcm1754_set_dai_fmt(struct snd_soc_dai *codec_dai, + unsigned int format) +{ + struct snd_soc_component *component = codec_dai->component; + struct pcm1754_priv *priv = snd_soc_component_get_drvdata(component); + + priv->format = format; + + return 0; +} + +static int pcm1754_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *codec_dai) +{ + struct snd_soc_component *component = codec_dai->component; + struct pcm1754_priv *priv = snd_soc_component_get_drvdata(component); + int format; + + switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) { + case SND_SOC_DAIFMT_RIGHT_J: + switch (params_width(params)) { + case 16: + format = 1; + break; + default: + return -EINVAL; + } + break; + case SND_SOC_DAIFMT_I2S: + switch (params_width(params)) { + case 16: + fallthrough; + case 24: + format = 0; + break; + default: + return -EINVAL; + } + break; + default: + dev_err(component->dev, "Invalid DAI format\n"); + return -EINVAL; + } + + gpiod_set_value_cansleep(priv->gpiod_format, format); + + return 0; +} + +static int pcm1754_mute_stream(struct snd_soc_dai *dai, int mute, int stream) +{ + struct pcm1754_priv *priv = snd_soc_component_get_drvdata(dai->component); + + gpiod_set_value_cansleep(priv->gpiod_mute, mute); + + return 0; +} + +static const struct snd_soc_dai_ops pcm1754_dai_ops = { + .set_fmt = pcm1754_set_dai_fmt, + .hw_params = pcm1754_hw_params, + .mute_stream = pcm1754_mute_stream, +}; + +static const struct snd_soc_dai_driver pcm1754_dai = { + .name = "pcm1754", + .playback = { + .stream_name = "Playback", + .channels_min = 2, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_CONTINUOUS, + .rate_min = 5000, + .rate_max = 200000, + .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE + }, + .ops = &pcm1754_dai_ops, +}; + +static const struct snd_soc_dapm_widget pcm1754_dapm_widgets[] = { + SND_SOC_DAPM_REGULATOR_SUPPLY("VCC", 0, 0), + + SND_SOC_DAPM_DAC("DAC1", "Channel 1 Playback", SND_SOC_NOPM, 0, 0), + SND_SOC_DAPM_DAC("DAC2", "Channel 2 Playback", SND_SOC_NOPM, 0, 0), + + SND_SOC_DAPM_OUTPUT("VOUTL"), + SND_SOC_DAPM_OUTPUT("VOUTR"), +}; + +static const struct snd_soc_dapm_route pcm1754_dapm_routes[] = { + { "DAC1", NULL, "Playback" }, + { "DAC2", NULL, "Playback" }, + + { "DAC1", NULL, "VCC" }, + { "DAC2", NULL, "VCC" }, + + { "VOUTL", NULL, "DAC1" }, + { "VOUTR", NULL, "DAC2" }, +}; + +static const struct snd_soc_component_driver soc_component_dev_pcm1754 = { + .dapm_widgets = pcm1754_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(pcm1754_dapm_widgets), + .dapm_routes = pcm1754_dapm_routes, + .num_dapm_routes = ARRAY_SIZE(pcm1754_dapm_routes), +}; + +static int pcm1754_probe(struct platform_device *pdev) +{ + struct pcm1754_priv *priv; + struct device *dev = &pdev->dev; + struct snd_soc_dai_driver *dai_drv; + int ret; + + dai_drv = devm_kmemdup(dev, &pcm1754_dai, sizeof(*dai_drv), GFP_KERNEL); + if (!dai_drv) + return -ENOMEM; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->gpiod_mute = devm_gpiod_get_optional(dev, "mute", GPIOD_OUT_HIGH); + if (IS_ERR(priv->gpiod_mute)) + return dev_err_probe(dev, PTR_ERR(priv->gpiod_mute), + "failed to get mute gpio"); + + priv->gpiod_format = devm_gpiod_get_optional(dev, "format", GPIOD_OUT_LOW); + if (IS_ERR(priv->gpiod_format)) + return dev_err_probe(dev, PTR_ERR(priv->gpiod_format), + "failed to get format gpio"); + + dev_set_drvdata(dev, priv); + + ret = devm_snd_soc_register_component( + &pdev->dev, &soc_component_dev_pcm1754, dai_drv, 1); + if (ret) + return dev_err_probe(dev, ret, "failed to register"); + + return 0; +} + +#ifdef CONFIG_OF +static const struct of_device_id pcm1754_of_match[] = { + { .compatible = "ti,pcm1754" }, + { } +}; +MODULE_DEVICE_TABLE(of, pcm1754_of_match); +#endif + +static struct platform_driver pcm1754_codec_driver = { + .driver = { + .name = "pcm1754-codec", + .of_match_table = of_match_ptr(pcm1754_of_match), + }, + .probe = pcm1754_probe, +}; + +module_platform_driver(pcm1754_codec_driver); + +MODULE_DESCRIPTION("ASoC PCM1754 driver"); +MODULE_AUTHOR("Alvin Å ipraga "); +MODULE_AUTHOR("Stefan Kerkmann "); +MODULE_LICENSE("GPL");