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104 lines
2.6 KiB
104 lines
2.6 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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#include <linux/gpio/consumer.h> |
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#include <linux/module.h> |
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#include <linux/regulator/consumer.h> |
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#include <sound/soc.h> |
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struct aw8738_priv { |
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struct gpio_desc *gpiod_mode; |
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unsigned int mode; |
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}; |
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static int aw8738_drv_event(struct snd_soc_dapm_widget *w, |
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struct snd_kcontrol *kcontrol, 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 aw8738_priv *aw = snd_soc_component_get_drvdata(c); |
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int i; |
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switch (event) { |
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case SND_SOC_DAPM_POST_PMU: |
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for (i = 0; i < aw->mode; i++) { |
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gpiod_set_value_cansleep(aw->gpiod_mode, 0); |
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udelay(2); |
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gpiod_set_value_cansleep(aw->gpiod_mode, 1); |
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udelay(2); |
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} |
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msleep(40); |
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break; |
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case SND_SOC_DAPM_PRE_PMD: |
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gpiod_set_value_cansleep(aw->gpiod_mode, 0); |
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usleep_range(1000, 2000); |
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break; |
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default: |
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WARN(1, "Unexpected event"); |
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return -EINVAL; |
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} |
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return 0; |
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} |
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static const struct snd_soc_dapm_widget aw8738_dapm_widgets[] = { |
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SND_SOC_DAPM_INPUT("IN"), |
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SND_SOC_DAPM_OUT_DRV_E("DRV", SND_SOC_NOPM, 0, 0, NULL, 0, aw8738_drv_event, |
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SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), |
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SND_SOC_DAPM_OUTPUT("OUT"), |
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}; |
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static const struct snd_soc_dapm_route aw8738_dapm_routes[] = { |
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{ "DRV", NULL, "IN" }, |
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{ "OUT", NULL, "DRV" }, |
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}; |
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static const struct snd_soc_component_driver aw8738_component_driver = { |
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.dapm_widgets = aw8738_dapm_widgets, |
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.num_dapm_widgets = ARRAY_SIZE(aw8738_dapm_widgets), |
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.dapm_routes = aw8738_dapm_routes, |
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.num_dapm_routes = ARRAY_SIZE(aw8738_dapm_routes), |
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}; |
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static int aw8738_probe(struct platform_device *pdev) |
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{ |
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struct device *dev = &pdev->dev; |
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struct aw8738_priv *aw; |
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int ret; |
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aw = devm_kzalloc(dev, sizeof(*aw), GFP_KERNEL); |
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if (!aw) |
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return -ENOMEM; |
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platform_set_drvdata(pdev, aw); |
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aw->gpiod_mode = devm_gpiod_get(dev, "mode", GPIOD_OUT_LOW); |
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if (IS_ERR(aw->gpiod_mode)) |
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return dev_err_probe(dev, PTR_ERR(aw->gpiod_mode), |
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"Failed to get 'mode' gpio"); |
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ret = device_property_read_u32(dev, "awinic,mode", &aw->mode); |
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if (ret) |
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return -EINVAL; |
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return devm_snd_soc_register_component(&pdev->dev, |
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&aw8738_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 aw8738_of_match[] = { |
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{ .compatible = "awinic,aw8738" }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(of, aw8738_of_match); |
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#endif |
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static struct platform_driver aw8738_driver = { |
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.probe = aw8738_probe, |
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.driver = { |
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.name = "aw8738", |
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.of_match_table = of_match_ptr(aw8738_of_match), |
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}, |
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}; |
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module_platform_driver(aw8738_driver); |
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MODULE_DESCRIPTION("Awinic AW8738 Amplifier Driver"); |
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MODULE_LICENSE("GPL v2");
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