sound/soc/mediatek/mt8186/mt8186-afe-gpio.c

Source file repositories/reference/linux-study-clean/sound/soc/mediatek/mt8186/mt8186-afe-gpio.c

File Facts

System
Linux kernel
Corpus path
sound/soc/mediatek/mt8186/mt8186-afe-gpio.c
Extension
.c
Size
6519 bytes
Lines
238
Domain
Driver Families
Bucket
sound/soc
Inferred role
Driver Families: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct audio_gpio_attr {
	const char *name;
	bool gpio_prepare;
	struct pinctrl_state *gpioctrl;
};

static struct audio_gpio_attr aud_gpios[MT8186_AFE_GPIO_GPIO_NUM] = {
	[MT8186_AFE_GPIO_CLK_MOSI_OFF] = {"aud_clk_mosi_off", false, NULL},
	[MT8186_AFE_GPIO_CLK_MOSI_ON] = {"aud_clk_mosi_on", false, NULL},
	[MT8186_AFE_GPIO_CLK_MISO_OFF] = {"aud_clk_miso_off", false, NULL},
	[MT8186_AFE_GPIO_CLK_MISO_ON] = {"aud_clk_miso_on", false, NULL},
	[MT8186_AFE_GPIO_DAT_MISO_OFF] = {"aud_dat_miso_off", false, NULL},
	[MT8186_AFE_GPIO_DAT_MISO_ON] = {"aud_dat_miso_on", false, NULL},
	[MT8186_AFE_GPIO_DAT_MOSI_OFF] = {"aud_dat_mosi_off", false, NULL},
	[MT8186_AFE_GPIO_DAT_MOSI_ON] = {"aud_dat_mosi_on", false, NULL},
	[MT8186_AFE_GPIO_I2S0_OFF] = {"aud_gpio_i2s0_off", false, NULL},
	[MT8186_AFE_GPIO_I2S0_ON] = {"aud_gpio_i2s0_on", false, NULL},
	[MT8186_AFE_GPIO_I2S1_OFF] = {"aud_gpio_i2s1_off", false, NULL},
	[MT8186_AFE_GPIO_I2S1_ON] = {"aud_gpio_i2s1_on", false, NULL},
	[MT8186_AFE_GPIO_I2S2_OFF] = {"aud_gpio_i2s2_off", false, NULL},
	[MT8186_AFE_GPIO_I2S2_ON] = {"aud_gpio_i2s2_on", false, NULL},
	[MT8186_AFE_GPIO_I2S3_OFF] = {"aud_gpio_i2s3_off", false, NULL},
	[MT8186_AFE_GPIO_I2S3_ON] = {"aud_gpio_i2s3_on", false, NULL},
	[MT8186_AFE_GPIO_TDM_OFF] = {"aud_gpio_tdm_off", false, NULL},
	[MT8186_AFE_GPIO_TDM_ON] = {"aud_gpio_tdm_on", false, NULL},
	[MT8186_AFE_GPIO_PCM_OFF] = {"aud_gpio_pcm_off", false, NULL},
	[MT8186_AFE_GPIO_PCM_ON] = {"aud_gpio_pcm_on", false, NULL},
};

static DEFINE_MUTEX(gpio_request_mutex);

int mt8186_afe_gpio_init(struct device *dev)
{
	int i, j, ret;

	aud_pinctrl = devm_pinctrl_get(dev);
	if (IS_ERR(aud_pinctrl)) {
		ret = PTR_ERR(aud_pinctrl);
		dev_err(dev, "%s(), ret %d, cannot get aud_pinctrl!\n",
			__func__, ret);
		return ret;
	}

	for (i = 0; i < ARRAY_SIZE(aud_gpios); i++) {
		aud_gpios[i].gpioctrl = pinctrl_lookup_state(aud_pinctrl,
							     aud_gpios[i].name);
		if (IS_ERR(aud_gpios[i].gpioctrl)) {
			ret = PTR_ERR(aud_gpios[i].gpioctrl);
			dev_dbg(dev, "%s(), pinctrl_lookup_state %s fail, ret %d\n",
				 __func__, aud_gpios[i].name, ret);
		} else {
			aud_gpios[i].gpio_prepare = true;
		}
	}

	/* gpio status init */
	for (i = MT8186_DAI_ADDA; i <= MT8186_DAI_TDM_IN; i++) {
		for (j = 0; j <= 1; j++)
			mt8186_afe_gpio_request(dev, false, i, j);
	}

	return 0;
}
EXPORT_SYMBOL_GPL(mt8186_afe_gpio_init);

static int mt8186_afe_gpio_select(struct device *dev,
				  enum mt8186_afe_gpio type)
{
	int ret = 0;

	if (type < 0 || type >= MT8186_AFE_GPIO_GPIO_NUM) {
		dev_dbg(dev, "%s(), error, invalid gpio type %d\n",
			__func__, type);
		return -EINVAL;
	}

	if (!aud_gpios[type].gpio_prepare) {
		dev_dbg(dev, "%s(), error, gpio type %d not prepared\n",
			__func__, type);
		return -EIO;
	}

	ret = pinctrl_select_state(aud_pinctrl,
				   aud_gpios[type].gpioctrl);
	if (ret) {
		dev_dbg(dev, "%s(), error, can not set gpio type %d\n",
			__func__, type);
		return ret;
	}

Annotation

Implementation Notes