1 // SPDX-License-Identifier: GPL-2.0-only
3  * dmic.c  --  SoC audio for Generic Digital MICs
18 #include <sound/soc-dapm.h>
27 struct dmic {  struct
31 	/* Delay after DMIC mode switch */
38 	struct snd_soc_component *component = dai->component;  in dmic_daiops_trigger()
39 	struct dmic *dmic = snd_soc_component_get_drvdata(component);  in dmic_daiops_trigger()  argument
43 		if (dmic->modeswitch_delay)  in dmic_daiops_trigger()
44 			mdelay(dmic->modeswitch_delay);  in dmic_daiops_trigger()
58 	struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);  in dmic_aif_event()
59 	struct dmic *dmic = snd_soc_component_get_drvdata(component);  in dmic_aif_event()  local
64 		if (dmic->gpio_en)  in dmic_aif_event()
65 			gpiod_set_value_cansleep(dmic->gpio_en, 1);  in dmic_aif_event()
67 		if (dmic->vref) {  in dmic_aif_event()
68 			ret = regulator_enable(dmic->vref);  in dmic_aif_event()
73 		if (dmic->wakeup_delay)  in dmic_aif_event()
74 			msleep(dmic->wakeup_delay);  in dmic_aif_event()
77 		if (dmic->gpio_en)  in dmic_aif_event()
78 			gpiod_set_value_cansleep(dmic->gpio_en, 0);  in dmic_aif_event()
80 		if (dmic->vref)  in dmic_aif_event()
81 			ret = regulator_disable(dmic->vref);  in dmic_aif_event()
90 	.name = "dmic-hifi",
110 	struct dmic *dmic;  in dmic_component_probe()  local
112 	dmic = devm_kzalloc(component->dev, sizeof(*dmic), GFP_KERNEL);  in dmic_component_probe()
113 	if (!dmic)  in dmic_component_probe()
114 		return -ENOMEM;  in dmic_component_probe()
116 	dmic->vref = devm_regulator_get_optional(component->dev, "vref");  in dmic_component_probe()
117 	if (IS_ERR(dmic->vref)) {  in dmic_component_probe()
118 		if (PTR_ERR(dmic->vref) != -ENODEV)  in dmic_component_probe()
119 			return dev_err_probe(component->dev, PTR_ERR(dmic->vref),  in dmic_component_probe()
121 		dmic->vref = NULL;  in dmic_component_probe()
124 	dmic->gpio_en = devm_gpiod_get_optional(component->dev,  in dmic_component_probe()
126 	if (IS_ERR(dmic->gpio_en))  in dmic_component_probe()
127 		return PTR_ERR(dmic->gpio_en);  in dmic_component_probe()
129 	device_property_read_u32(component->dev, "wakeup-delay-ms",  in dmic_component_probe()
130 				 &dmic->wakeup_delay);  in dmic_component_probe()
131 	device_property_read_u32(component->dev, "modeswitch-delay-ms",  in dmic_component_probe()
132 				 &dmic->modeswitch_delay);  in dmic_component_probe()
134 		dmic->wakeup_delay  = wakeup_delay;  in dmic_component_probe()
136 		dmic->modeswitch_delay  = modeswitch_delay;  in dmic_component_probe()
138 	if (dmic->modeswitch_delay > MAX_MODESWITCH_DELAY)  in dmic_component_probe()
139 		dmic->modeswitch_delay = MAX_MODESWITCH_DELAY;  in dmic_component_probe()
141 	snd_soc_component_set_drvdata(component, dmic);  in dmic_component_probe()
147 	SND_SOC_DAPM_AIF_OUT_E("DMIC AIF", "Capture", 0,
150 	SND_SOC_DAPM_INPUT("DMic"),
154 	{"DMIC AIF", NULL, "DMic"},
174 	if (pdev->dev.of_node) {  in dmic_dev_probe()
175 		err = of_property_read_u32(pdev->dev.of_node, "num-channels", &chans);  in dmic_dev_probe()
176 		if (err && (err != -EINVAL))  in dmic_dev_probe()
181 				return -EINVAL;  in dmic_dev_probe()
183 			dai_drv = devm_kzalloc(&pdev->dev, sizeof(*dai_drv), GFP_KERNEL);  in dmic_dev_probe()
185 				return -ENOMEM;  in dmic_dev_probe()
188 			dai_drv->capture.channels_max = chans;  in dmic_dev_probe()
192 	return devm_snd_soc_register_component(&pdev->dev,  in dmic_dev_probe()
196 MODULE_ALIAS("platform:dmic-codec");
199 	{.compatible = "dmic-codec"},
206 		.name = "dmic-codec",
214 MODULE_DESCRIPTION("Generic DMIC driver");