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Commit a31ebc34 authored by Daniel Mack's avatar Daniel Mack Committed by Mark Brown
Browse files

ALSA: ASoC: add DT bindings for CS4271 



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

Signed-off-by: default avatarDaniel Mack <zonque@gmail.com>
Cc: Alexander Sverdlin <subaparts@yandex.ru>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent eb4d5fc1

Documentation/devicetree/bindings/sound/cs4271.txt

0 → 100644
+36 −0
Original line number Diff line number Diff line 
Cirrus Logic CS4271 DT bindings



This driver supports both the I2C and the SPI bus.



Required properties:



 - compatible: "cirrus,cs4271"



For required properties on SPI, please consult

Documentation/devicetree/bindings/spi/spi-bus.txt



Required properties on I2C:



 - reg: the i2c address





Optional properties:



 - reset-gpio: 	a GPIO spec to define which pin is connected to the chip's

		!RESET pin



Examples:



	codec_i2c: cs4271@10 {

		compatible = "cirrus,cs4271";

		reg = <0x10>;

		reset-gpio = <&gpio 23 0>;

	};



	codec_spi: cs4271@0 {

		compatible = "cirrus,cs4271";

		reg = <0x0>;

		reset-gpio = <&gpio 23 0>;

		spi-max-frequency = <6000000>;

	};

sound/soc/codecs/cs4271.c

+21 −3
Original line number Diff line number Diff line
@@ -22,12 +22,14 @@ 
#include <linux/module.h>

#include <linux/slab.h>

#include <linux/delay.h>

#include <sound/pcm.h>

#include <sound/soc.h>

#include <sound/tlv.h>

#include <linux/gpio.h>

#include <linux/i2c.h>

#include <linux/spi/spi.h>

#include <linux/of_device.h>

#include <linux/of_gpio.h>

#include <sound/pcm.h>

#include <sound/soc.h>

#include <sound/tlv.h>

#include <sound/cs4271.h>



#define CS4271_PCM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
@@ -458,6 +460,14 @@ static int cs4271_soc_resume(struct snd_soc_codec *codec) 
#define cs4271_soc_resume	NULL

#endif /* CONFIG_PM */



#ifdef CONFIG_OF

static const struct of_device_id cs4271_dt_ids[] = {

	{ .compatible = "cirrus,cs4271", },

	{ }

};

MODULE_DEVICE_TABLE(of, cs4271_dt_ids);

#endif



static int cs4271_probe(struct snd_soc_codec *codec)

{

	struct cs4271_private *cs4271 = snd_soc_codec_get_drvdata(codec);
@@ -465,6 +475,12 @@ static int cs4271_probe(struct snd_soc_codec *codec) 
	int ret;

	int gpio_nreset = -EINVAL;



#ifdef CONFIG_OF

	if (of_match_device(cs4271_dt_ids, codec->dev))

		gpio_nreset = of_get_named_gpio(codec->dev->of_node,

						"reset-gpio", 0);

#endif



	if (cs4271plat && gpio_is_valid(cs4271plat->gpio_nreset))

		gpio_nreset = cs4271plat->gpio_nreset;
@@ -569,6 +585,7 @@ static struct spi_driver cs4271_spi_driver = { 
	.driver = {

		.name	= "cs4271",

		.owner	= THIS_MODULE,

		.of_match_table = of_match_ptr(cs4271_dt_ids),

	},

	.probe		= cs4271_spi_probe,

	.remove		= __devexit_p(cs4271_spi_remove),
@@ -608,6 +625,7 @@ static struct i2c_driver cs4271_i2c_driver = { 
	.driver = {

		.name	= "cs4271",

		.owner	= THIS_MODULE,

		.of_match_table = of_match_ptr(cs4271_dt_ids),

	},

	.id_table	= cs4271_i2c_id,

	.probe		= cs4271_i2c_probe,