1 // SPDX-License-Identifier: GPL-2.0-only
3  * dmic.c  --  SoC audio for Generic Digital MICs
17 #include <sound/soc-dapm.h>
26 struct dmic {  struct
29 	/* Delay after DMIC mode switch */
36 	struct snd_soc_component *component = dai->component;  in dmic_daiops_trigger()
37 	struct dmic *dmic = snd_soc_component_get_drvdata(component);  in dmic_daiops_trigger()  argument
41 		if (dmic->modeswitch_delay)  in dmic_daiops_trigger()
42 			mdelay(dmic->modeswitch_delay);  in dmic_daiops_trigger()
56 	struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);  in dmic_aif_event()
57 	struct dmic *dmic = snd_soc_component_get_drvdata(component);  in dmic_aif_event()  local
61 		if (dmic->gpio_en)  in dmic_aif_event()
62 			gpiod_set_value_cansleep(dmic->gpio_en, 1);  in dmic_aif_event()
64 		if (dmic->wakeup_delay)  in dmic_aif_event()
65 			msleep(dmic->wakeup_delay);  in dmic_aif_event()
68 		if (dmic->gpio_en)  in dmic_aif_event()
69 			gpiod_set_value_cansleep(dmic->gpio_en, 0);  in dmic_aif_event()
77 	.name = "dmic-hifi",
92 	struct dmic *dmic;  in dmic_component_probe()  local
94 	dmic = devm_kzalloc(component->dev, sizeof(*dmic), GFP_KERNEL);  in dmic_component_probe()
95 	if (!dmic)  in dmic_component_probe()
96 		return -ENOMEM;  in dmic_component_probe()
98 	dmic->gpio_en = devm_gpiod_get_optional(component->dev,  in dmic_component_probe()
100 	if (IS_ERR(dmic->gpio_en))  in dmic_component_probe()
101 		return PTR_ERR(dmic->gpio_en);  in dmic_component_probe()
103 	device_property_read_u32(component->dev, "wakeup-delay-ms",  in dmic_component_probe()
104 				 &dmic->wakeup_delay);  in dmic_component_probe()
105 	device_property_read_u32(component->dev, "modeswitch-delay-ms",  in dmic_component_probe()
106 				 &dmic->modeswitch_delay);  in dmic_component_probe()
108 		dmic->wakeup_delay  = wakeup_delay;  in dmic_component_probe()
110 		dmic->modeswitch_delay  = modeswitch_delay;  in dmic_component_probe()
112 	if (dmic->modeswitch_delay > MAX_MODESWITCH_DELAY)  in dmic_component_probe()
113 		dmic->modeswitch_delay = MAX_MODESWITCH_DELAY;  in dmic_component_probe()
115 	snd_soc_component_set_drvdata(component, dmic);  in dmic_component_probe()
121 	SND_SOC_DAPM_AIF_OUT_E("DMIC AIF", "Capture", 0,
124 	SND_SOC_DAPM_INPUT("DMic"),
128 	{"DMIC AIF", NULL, "DMic"},
149 	if (pdev->dev.of_node) {  in dmic_dev_probe()
150 		err = of_property_read_u32(pdev->dev.of_node, "num-channels", &chans);  in dmic_dev_probe()
151 		if (err && (err != -EINVAL))  in dmic_dev_probe()
156 				return -EINVAL;  in dmic_dev_probe()
158 			dai_drv = devm_kzalloc(&pdev->dev, sizeof(*dai_drv), GFP_KERNEL);  in dmic_dev_probe()
160 				return -ENOMEM;  in dmic_dev_probe()
163 			dai_drv->capture.channels_max = chans;  in dmic_dev_probe()
167 	return devm_snd_soc_register_component(&pdev->dev,  in dmic_dev_probe()
171 MODULE_ALIAS("platform:dmic-codec");
174 	{.compatible = "dmic-codec"},
181 		.name = "dmic-codec",
189 MODULE_DESCRIPTION("Generic DMIC driver");