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ASoC: codecs: adau1701: add DT bindings

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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>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Daniel Mack 2013-05-23 15:46:05 +02:00 committed by Mark Brown
parent 47f5b692e0
commit 04561eacaa
2 changed files with 57 additions and 1 deletions
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23
Documentation/devicetree/bindings/sound/adi,adau1701.txt Normal file
View File

@ -0,0 +1,23 @@
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>;
};
};

35
sound/soc/codecs/adau1701.c
View File

@ -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,