/**
* mmc_gpiod_request_cd - request a gpio descriptor for card-detection
* @host: mmc host
* @con_id: function within the GPIO consumer
* @idx: index of the GPIO to obtain in the consumer
* @override_active_level: ignore %GPIO_ACTIVE_LOW flag
* @debounce: debounce time in microseconds
* @gpio_invert: will return whether the GPIO line is inverted or not, set
* to NULL to ignore
*
* Use this function in place of mmc_gpio_request_cd() to use the GPIO
* descriptor API. Note that it is paired with mmc_gpiod_free_cd() not
* mmc_gpio_free_cd(). Note also that it must be called prior to mmc_add_host()
* otherwise the caller must also call mmc_gpiod_request_cd_irq().
*
* Returns zero on success, else an error.
*/
int mmc_gpiod_request_cd(struct mmc_host *host, const char *con_id,
unsigned int idx, bool override_active_level,
unsigned int debounce, bool *gpio_invert)
{
struct mmc_gpio *ctx;
struct gpio_desc *desc;
int ret;
ret = mmc_gpio_alloc(host);
if (ret < 0)
return ret;
ctx = host->slot.handler_priv;
if (!con_id)
con_id = ctx->cd_label;
desc = devm_gpiod_get_index(host->parent, con_id, idx, GPIOD_IN);
if (IS_ERR(desc))
return PTR_ERR(desc);
if (debounce) {
ret = gpiod_set_debounce(desc, debounce);
if (ret < 0)
return ret;
}
if (gpio_invert)
*gpio_invert = !gpiod_is_active_low(desc);
ctx->override_cd_active_level = override_active_level;
ctx->cd_gpio = desc;
return 0;
}
/**
* mmc_gpiod_request_ro - request a gpio descriptor for write protection
* @host: mmc host
* @con_id: function within the GPIO consumer
* @idx: index of the GPIO to obtain in the consumer
* @debounce: debounce time in microseconds
* @gpio_invert: will return whether the GPIO line is inverted or not,
* set to NULL to ignore
*
* Returns zero on success, else an error.
*/
int mmc_gpiod_request_ro(struct mmc_host *host, const char *con_id,
unsigned int idx,
unsigned int debounce, bool *gpio_invert)
{
struct mmc_gpio *ctx = host->slot.handler_priv;
struct gpio_desc *desc;
int ret;
desc = devm_gpiod_get_index(host->parent, con_id, idx, GPIOD_IN);
if (IS_ERR(desc))
return PTR_ERR(desc);
if (debounce) {
ret = gpiod_set_debounce(desc, debounce);
if (ret < 0)
return ret;
}
if (gpio_invert)
*gpio_invert = !gpiod_is_active_low(desc);
ctx->ro_gpio = desc;
return 0;
}
static int cs53l30_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
const struct device_node *np = client->dev.of_node;
struct device *dev = &client->dev;
struct cs53l30_private *cs53l30;
unsigned int devid = 0;
unsigned int reg;
int ret = 0, i;
u8 val;
cs53l30 = devm_kzalloc(dev, sizeof(*cs53l30), GFP_KERNEL);
if (!cs53l30)
return -ENOMEM;
for (i = 0; i < ARRAY_SIZE(cs53l30->supplies); i++)
cs53l30->supplies[i].supply = cs53l30_supply_names[i];
ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(cs53l30->supplies),
cs53l30->supplies);
if (ret) {
dev_err(dev, "failed to get supplies: %d\n", ret);
return ret;
}
ret = regulator_bulk_enable(ARRAY_SIZE(cs53l30->supplies),
cs53l30->supplies);
if (ret) {
dev_err(dev, "failed to enable supplies: %d\n", ret);
return ret;
}
/* Reset the Device */
cs53l30->reset_gpio = devm_gpiod_get_optional(dev, "reset",
GPIOD_OUT_LOW);
if (IS_ERR(cs53l30->reset_gpio)) {
ret = PTR_ERR(cs53l30->reset_gpio);
goto error;
}
gpiod_set_value_cansleep(cs53l30->reset_gpio, 1);
i2c_set_clientdata(client, cs53l30);
cs53l30->mclk_rate = 0;
cs53l30->regmap = devm_regmap_init_i2c(client, &cs53l30_regmap);
if (IS_ERR(cs53l30->regmap)) {
ret = PTR_ERR(cs53l30->regmap);
dev_err(dev, "regmap_init() failed: %d\n", ret);
goto error;
}
/* Initialize codec */
ret = regmap_read(cs53l30->regmap, CS53L30_DEVID_AB, ®);
devid = reg << 12;
ret = regmap_read(cs53l30->regmap, CS53L30_DEVID_CD, ®);
devid |= reg << 4;
ret = regmap_read(cs53l30->regmap, CS53L30_DEVID_E, ®);
devid |= (reg & 0xF0) >> 4;
if (devid != CS53L30_DEVID) {
ret = -ENODEV;
dev_err(dev, "Device ID (%X). Expected %X\n",
devid, CS53L30_DEVID);
goto error;
}
ret = regmap_read(cs53l30->regmap, CS53L30_REVID, ®);
if (ret < 0) {
dev_err(dev, "failed to get Revision ID: %d\n", ret);
goto error;
}
/* Check if MCLK provided */
cs53l30->mclk = devm_clk_get(dev, "mclk");
if (IS_ERR(cs53l30->mclk)) {
if (PTR_ERR(cs53l30->mclk) != -ENOENT) {
ret = PTR_ERR(cs53l30->mclk);
goto error;
}
/* Otherwise mark the mclk pointer to NULL */
cs53l30->mclk = NULL;
}
/* Fetch the MUTE control */
cs53l30->mute_gpio = devm_gpiod_get_optional(dev, "mute",
GPIOD_OUT_HIGH);
if (IS_ERR(cs53l30->mute_gpio)) {
ret = PTR_ERR(cs53l30->mute_gpio);
goto error;
}
if (cs53l30->mute_gpio) {
/* Enable MUTE controls via MUTE pin */
regmap_write(cs53l30->regmap, CS53L30_MUTEP_CTL1,
CS53L30_MUTEP_CTL1_MUTEALL);
/* Flip the polarity of MUTE pin */
if (gpiod_is_active_low(cs53l30->mute_gpio))
regmap_update_bits(cs53l30->regmap, CS53L30_MUTEP_CTL2,
CS53L30_MUTE_PIN_POLARITY, 0);
}
if (!of_property_read_u8(np, "cirrus,micbias-lvl", &val))
regmap_update_bits(cs53l30->regmap, CS53L30_MICBIAS_CTL,
CS53L30_MIC_BIAS_CTRL_MASK, val);
if (of_property_read_bool(np, "cirrus,use-sdout2"))
cs53l30->use_sdout2 = true;
dev_info(dev, "Cirrus Logic CS53L30, Revision: %02X\n", reg & 0xFF);
ret = snd_soc_register_codec(dev, &cs53l30_driver, &cs53l30_dai, 1);
if (ret) {
dev_err(dev, "failed to register codec: %d\n", ret);
goto error;
}
return 0;
error:
regulator_bulk_disable(ARRAY_SIZE(cs53l30->supplies),
cs53l30->supplies);
return ret;
}
