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104 lines
2.6 KiB
104 lines
2.6 KiB
// SPDX-License-Identifier: GPL-2.0 |
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// |
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// Analog Devices SSM2305 Amplifier Driver |
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// |
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// Copyright (C) 2018 Pengutronix, Marco Felsch <[email protected]> |
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// |
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#include <linux/gpio/consumer.h> |
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#include <linux/module.h> |
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#include <sound/soc.h> |
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#define DRV_NAME "ssm2305" |
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struct ssm2305 { |
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/* shutdown gpio */ |
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struct gpio_desc *gpiod_shutdown; |
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}; |
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static int ssm2305_power_event(struct snd_soc_dapm_widget *w, |
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struct snd_kcontrol *kctrl, int event) |
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{ |
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struct snd_soc_component *c = snd_soc_dapm_to_component(w->dapm); |
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struct ssm2305 *data = snd_soc_component_get_drvdata(c); |
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gpiod_set_value_cansleep(data->gpiod_shutdown, |
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SND_SOC_DAPM_EVENT_ON(event)); |
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return 0; |
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} |
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static const struct snd_soc_dapm_widget ssm2305_dapm_widgets[] = { |
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/* Stereo input/output */ |
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SND_SOC_DAPM_INPUT("L_IN"), |
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SND_SOC_DAPM_INPUT("R_IN"), |
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SND_SOC_DAPM_OUTPUT("L_OUT"), |
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SND_SOC_DAPM_OUTPUT("R_OUT"), |
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SND_SOC_DAPM_SUPPLY("Power", SND_SOC_NOPM, 0, 0, ssm2305_power_event, |
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SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD), |
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}; |
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static const struct snd_soc_dapm_route ssm2305_dapm_routes[] = { |
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{ "L_OUT", NULL, "L_IN" }, |
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{ "R_OUT", NULL, "R_IN" }, |
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{ "L_IN", NULL, "Power" }, |
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{ "R_IN", NULL, "Power" }, |
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}; |
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static const struct snd_soc_component_driver ssm2305_component_driver = { |
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.dapm_widgets = ssm2305_dapm_widgets, |
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.num_dapm_widgets = ARRAY_SIZE(ssm2305_dapm_widgets), |
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.dapm_routes = ssm2305_dapm_routes, |
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.num_dapm_routes = ARRAY_SIZE(ssm2305_dapm_routes), |
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}; |
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static int ssm2305_probe(struct platform_device *pdev) |
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{ |
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struct device *dev = &pdev->dev; |
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struct ssm2305 *priv; |
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int err; |
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/* Allocate the private data */ |
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); |
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if (!priv) |
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return -ENOMEM; |
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platform_set_drvdata(pdev, priv); |
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/* Get shutdown gpio */ |
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priv->gpiod_shutdown = devm_gpiod_get(dev, "shutdown", |
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GPIOD_OUT_LOW); |
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if (IS_ERR(priv->gpiod_shutdown)) { |
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err = PTR_ERR(priv->gpiod_shutdown); |
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if (err != -EPROBE_DEFER) |
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dev_err(dev, "Failed to get 'shutdown' gpio: %d\n", |
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err); |
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return err; |
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} |
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return devm_snd_soc_register_component(dev, &ssm2305_component_driver, |
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NULL, 0); |
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} |
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#ifdef CONFIG_OF |
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static const struct of_device_id ssm2305_of_match[] = { |
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{ .compatible = "adi,ssm2305", }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(of, ssm2305_of_match); |
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#endif |
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static struct platform_driver ssm2305_driver = { |
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.driver = { |
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.name = DRV_NAME, |
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.of_match_table = of_match_ptr(ssm2305_of_match), |
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}, |
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.probe = ssm2305_probe, |
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}; |
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module_platform_driver(ssm2305_driver); |
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MODULE_DESCRIPTION("ASoC SSM2305 amplifier driver"); |
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MODULE_AUTHOR("Marco Felsch <[email protected]>"); |
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MODULE_LICENSE("GPL v2");
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