Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 04561eac authored by Daniel Mack's avatar Daniel Mack Committed by Mark Brown
Browse files

ASoC: codecs: adau1701: add DT bindings 



Apart from pure matching, the bindings also support setting the the
reset gpio line.

Signed-off-by: default avatarDaniel Mack <zonque@gmail.com>
Acked-by: default avatarLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 47f5b692

Documentation/devicetree/bindings/sound/adi,adau1701.txt

0 → 100644
+23 −0
Original line number Diff line number Diff line 
Analog Devices ADAU1701



Required properties:



 - compatible:		Should contain "adi,adau1701"

 - reg:			The i2c address. Value depends on the state of ADDR0

			and ADDR1, as wired in hardware.



Optional properties:



 - reset-gpio: 		A GPIO spec to define which pin is connected to the

			chip's !RESET pin. If specified, the driver will

			assert a hardware reset at probe time.



Examples:



	i2c_bus {

		adau1701@34 {

			compatible = "adi,adau1701";

			reg = <0x34>;

			reset-gpio = <&gpio 23 0>;

		};

	};

sound/soc/codecs/adau1701.c

+34 −1
Original line number Diff line number Diff line
@@ -13,6 +13,9 @@ 
#include <linux/i2c.h>

#include <linux/delay.h>

#include <linux/slab.h>

#include <linux/of.h>

#include <linux/of_gpio.h>

#include <linux/of_device.h>

#include <sound/core.h>

#include <sound/pcm.h>

#include <sound/pcm_params.h>
@@ -452,6 +455,14 @@ static struct snd_soc_dai_driver adau1701_dai = { 
	.symmetric_rates = 1,

};



#ifdef CONFIG_OF

static const struct of_device_id adau1701_dt_ids[] = {

	{ .compatible = "adi,adau1701", },

	{ }

};

MODULE_DEVICE_TABLE(of, adau1701_dt_ids);

#endif



static int adau1701_probe(struct snd_soc_codec *codec)

{

	int ret;
@@ -494,12 +505,33 @@ static int adau1701_i2c_probe(struct i2c_client *client, 
			      const struct i2c_device_id *id)

{

	struct adau1701 *adau1701;

	struct device *dev = &client->dev;

	int gpio_nreset = -EINVAL;

	int ret;



	adau1701 = devm_kzalloc(&client->dev, sizeof(*adau1701), GFP_KERNEL);

	adau1701 = devm_kzalloc(dev, sizeof(*adau1701), GFP_KERNEL);

	if (!adau1701)

		return -ENOMEM;



	if (dev->of_node) {

		gpio_nreset = of_get_named_gpio(dev->of_node, "reset-gpio", 0);

		if (gpio_nreset < 0 && gpio_nreset != -ENOENT)

			return gpio_nreset;

	}



	if (gpio_is_valid(gpio_nreset)) {

		ret = devm_gpio_request_one(dev, gpio_nreset, GPIOF_OUT_INIT_LOW,

					    "ADAU1701 Reset");

		if (ret < 0)

			return ret;



		/* minimum reset time is 20ns */

		udelay(1);

		gpio_set_value(gpio_nreset, 1);

		/* power-up time may be as long as 85ms */

		mdelay(85);

	}



	i2c_set_clientdata(client, adau1701);

	ret = snd_soc_register_codec(&client->dev, &adau1701_codec_drv,

			&adau1701_dai, 1);
@@ -522,6 +554,7 @@ static struct i2c_driver adau1701_i2c_driver = { 
	.driver = {

		.name	= "adau1701",

		.owner	= THIS_MODULE,

		.of_match_table	= of_match_ptr(adau1701_dt_ids),

	},

	.probe		= adau1701_i2c_probe,

	.remove		= adau1701_i2c_remove,