The patch

ASoC: ssm2305: Add amplifier driver

has been applied to the asoc tree at

https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git

All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying to this mail.

Thanks, Mark

From 74f24d8728ef12276d58e3d73283cc1d76db7507 Mon Sep 17 00:00:00 2001

From: Marco Felsch m.felsch@pengutronix.de Date: Thu, 17 May 2018 15:55:18 +0200 Subject: [PATCH] ASoC: ssm2305: Add amplifier driver

The ssm2305 is a simple Class-D audio amplifier. A application can turn on/off the device by a gpio. It's also possible to hardwire the shutdown pin.

Tested on a i.MX6 based custom board.

Signed-off-by: Marco Felsch m.felsch@pengutronix.de Reviewed-by: Lars-Peter Clausen lars@metafoo.de Signed-off-by: Mark Brown broonie@kernel.org --- .../devicetree/bindings/sound/adi,ssm2305.txt | 14 +++ sound/soc/codecs/Kconfig | 7 ++ sound/soc/codecs/Makefile | 2 + sound/soc/codecs/ssm2305.c | 104 ++++++++++++++++++ 4 files changed, 127 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/adi,ssm2305.txt create mode 100644 sound/soc/codecs/ssm2305.c

diff --git a/Documentation/devicetree/bindings/sound/adi,ssm2305.txt b/Documentation/devicetree/bindings/sound/adi,ssm2305.txt new file mode 100644 index 000000000000..a9c9d83c8a30 --- /dev/null +++ b/Documentation/devicetree/bindings/sound/adi,ssm2305.txt @@ -0,0 +1,14 @@ +Analog Devices SSM2305 Speaker Amplifier +======================================== + +Required properties: + - compatible : "adi,ssm2305" + - shutdown-gpios : The gpio connected to the shutdown pin. + The gpio signal is ACTIVE_LOW. + +Example: + +ssm2305: analog-amplifier { + compatible = "adi,ssm2305"; + shutdown-gpios = <&gpio3 20 GPIO_ACTIVE_LOW>; +}; diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig index 83c51c5a4d08..a3e7c44c6586 100644 --- a/sound/soc/codecs/Kconfig +++ b/sound/soc/codecs/Kconfig @@ -145,6 +145,7 @@ config SND_SOC_ALL_CODECS select SND_SOC_SI476X if MFD_SI476X_CORE select SND_SOC_SIRF_AUDIO_CODEC select SND_SOC_SPDIF + select SND_SOC_SSM2305 select SND_SOC_SSM2518 if I2C select SND_SOC_SSM2602_SPI if SPI_MASTER select SND_SOC_SSM2602_I2C if I2C @@ -896,6 +897,12 @@ config SND_SOC_SIRF_AUDIO_CODEC config SND_SOC_SPDIF tristate "S/PDIF CODEC"

+config SND_SOC_SSM2305 + tristate "Analog Devices SSM2305 Class-D Amplifier" + help + Enable support for Analog Devices SSM2305 filterless + high-efficiency mono Class-D audio power amplifiers. + config SND_SOC_SSM2518 tristate

diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile index 1ac49b9abec6..4c85f3391705 100644 --- a/sound/soc/codecs/Makefile +++ b/sound/soc/codecs/Makefile @@ -156,6 +156,7 @@ snd-soc-si476x-objs := si476x.o snd-soc-sirf-audio-codec-objs := sirf-audio-codec.o snd-soc-spdif-tx-objs := spdif_transmitter.o snd-soc-spdif-rx-objs := spdif_receiver.o +snd-soc-ssm2305-objs := ssm2305.o snd-soc-ssm2518-objs := ssm2518.o snd-soc-ssm2602-objs := ssm2602.o snd-soc-ssm2602-spi-objs := ssm2602-spi.o @@ -410,6 +411,7 @@ obj-$(CONFIG_SND_SOC_SIGMADSP_REGMAP) += snd-soc-sigmadsp-regmap.o obj-$(CONFIG_SND_SOC_SI476X) += snd-soc-si476x.o obj-$(CONFIG_SND_SOC_SPDIF) += snd-soc-spdif-rx.o snd-soc-spdif-tx.o obj-$(CONFIG_SND_SOC_SIRF_AUDIO_CODEC) += sirf-audio-codec.o +obj-$(CONFIG_SND_SOC_SSM2305) += snd-soc-ssm2305.o obj-$(CONFIG_SND_SOC_SSM2518) += snd-soc-ssm2518.o obj-$(CONFIG_SND_SOC_SSM2602) += snd-soc-ssm2602.o obj-$(CONFIG_SND_SOC_SSM2602_SPI) += snd-soc-ssm2602-spi.o diff --git a/sound/soc/codecs/ssm2305.c b/sound/soc/codecs/ssm2305.c new file mode 100644 index 000000000000..39d8b01cd852 --- /dev/null +++ b/sound/soc/codecs/ssm2305.c @@ -0,0 +1,104 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Analog Devices SSM2305 Amplifier Driver + * + * Copyright (C) 2018 Pengutronix, Marco Felsch kernel@pengutronix.de + */ + +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <sound/soc.h> + +#define DRV_NAME "ssm2305" + +struct ssm2305 { + /* shutdown gpio */ + struct gpio_desc *gpiod_shutdown; +}; + +static int ssm2305_power_event(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *kctrl, int event) +{ + struct snd_soc_component *c = snd_soc_dapm_to_component(w->dapm); + struct ssm2305 *data = snd_soc_component_get_drvdata(c); + + gpiod_set_value_cansleep(data->gpiod_shutdown, + SND_SOC_DAPM_EVENT_ON(event)); + + return 0; +} + +static const struct snd_soc_dapm_widget ssm2305_dapm_widgets[] = { + /* Stereo input/output */ + SND_SOC_DAPM_INPUT("L_IN"), + SND_SOC_DAPM_INPUT("R_IN"), + SND_SOC_DAPM_OUTPUT("L_OUT"), + SND_SOC_DAPM_OUTPUT("R_OUT"), + + SND_SOC_DAPM_SUPPLY("Power", SND_SOC_NOPM, 0, 0, ssm2305_power_event, + SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD), +}; + +static const struct snd_soc_dapm_route ssm2305_dapm_routes[] = { + { "L_OUT", NULL, "L_IN" }, + { "R_OUT", NULL, "R_IN" }, + { "L_IN", NULL, "Power" }, + { "R_IN", NULL, "Power" }, +}; + +static const struct snd_soc_component_driver ssm2305_component_driver = { + .dapm_widgets = ssm2305_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(ssm2305_dapm_widgets), + .dapm_routes = ssm2305_dapm_routes, + .num_dapm_routes = ARRAY_SIZE(ssm2305_dapm_routes), +}; + +static int ssm2305_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct ssm2305 *priv; + int err; + + /* Allocate the private data */ + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + platform_set_drvdata(pdev, priv); + + /* Get shutdown gpio */ + priv->gpiod_shutdown = devm_gpiod_get(dev, "shutdown", + GPIOD_OUT_LOW); + if (IS_ERR(priv->gpiod_shutdown)) { + err = PTR_ERR(priv->gpiod_shutdown); + if (err != -EPROBE_DEFER) + dev_err(dev, "Failed to get 'shutdown' gpio: %d\n", + err); + return err; + } + + return devm_snd_soc_register_component(dev, &ssm2305_component_driver, + NULL, 0); +} + +#ifdef CONFIG_OF +static const struct of_device_id ssm2305_of_match[] = { + { .compatible = "adi,ssm2305", }, + { } +}; +MODULE_DEVICE_TABLE(of, ssm2305_of_match); +#endif + +static struct platform_driver ssm2305_driver = { + .driver = { + .name = DRV_NAME, + .of_match_table = of_match_ptr(ssm2305_of_match), + }, + .probe = ssm2305_probe, +}; + +module_platform_driver(ssm2305_driver); + +MODULE_DESCRIPTION("ASoC SSM2305 amplifier driver"); +MODULE_AUTHOR("Marco Felsch m.felsch@pengutronix.de"); +MODULE_LICENSE("GPL v2");