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ALSA: ASoC: add DT bindings for CS4271

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

Signed-off-by: Daniel Mack <zonque@gmail.com>
Cc: Alexander Sverdlin <subaparts@yandex.ru>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Daniel Mack 2012-09-28 01:36:44 +02:00 committed by Mark Brown
parent eb4d5fc1f0
commit a31ebc349d
2 changed files with 57 additions and 3 deletions
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36
Documentation/devicetree/bindings/sound/cs4271.txt Normal file
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@ -0,0 +1,36 @@
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>;
};

24
sound/soc/codecs/cs4271.c
View File

@ -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,