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ASoC: cs42l73: Add Device Tree support for CS42L73 

This patch adds support for device tree for the CS42L73 CODEC

Signed-off-by: Brian Austin <brian.austin@cirrus.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Brian Austin 2013-10-18 14:30:01 -05:00 committed by Mark Brown
parent f9ca060680
commit 7b09eea529
2 changed files with 49 additions and 2 deletions
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22
Documentation/devicetree/bindings/sound/cs42l73.txt Normal file
View File

@ -0,0 +1,22 @@
CS42L73 audio CODEC
Required properties:
- compatible : "cirrus,cs42l73"
- reg : the I2C address of the device for I2C
Optional properties:
- reset_gpio : a GPIO spec for the reset pin.
- chgfreq : Charge Pump Frequency values 0x00-0x0F
Example:
codec: cs42l73@4a {
compatible = "cirrus,cs42l73";
reg = <0x4a>;
reset_gpio = <&gpio 10 0>;
chgfreq = <0x05>;
};

29
sound/soc/codecs/cs42l73.c
View File

@ -17,7 +17,7 @@
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/of_gpio.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
@ -1416,6 +1416,7 @@ static int cs42l73_i2c_probe(struct i2c_client *i2c_client,
int ret;
unsigned int devid = 0;
unsigned int reg;
u32 val32;
cs42l73 = devm_kzalloc(&i2c_client->dev, sizeof(struct cs42l73_private),
GFP_KERNEL);
@ -1431,8 +1432,25 @@ static int cs42l73_i2c_probe(struct i2c_client *i2c_client,
return ret;
}
if (pdata)
if (pdata) {
cs42l73->pdata = *pdata;
} else {
pdata = devm_kzalloc(&i2c_client->dev,
sizeof(struct cs42l73_platform_data),
GFP_KERNEL);
if (!pdata) {
dev_err(&i2c_client->dev, "could not allocate pdata\n");
return -ENOMEM;
}
if (i2c_client->dev.of_node) {
if (of_property_read_u32(i2c_client->dev.of_node,
"chgfreq", &val32) >= 0)
pdata->chgfreq = val32;
}
pdata->reset_gpio = of_get_named_gpio(i2c_client->dev.of_node,
"reset-gpio", 0);
cs42l73->pdata = *pdata;
}
i2c_set_clientdata(i2c_client, cs42l73);
@ -1493,6 +1511,12 @@ static int cs42l73_i2c_remove(struct i2c_client *client)
return 0;
}
static const struct of_device_id cs42l73_of_match[] = {
{ .compatible = "cirrus,cs42l73", },
{},
};
MODULE_DEVICE_TABLE(of, cs42l73_of_match);
static const struct i2c_device_id cs42l73_id[] = {
{"cs42l73", 0},
{}
@ -1504,6 +1528,7 @@ static struct i2c_driver cs42l73_i2c_driver = {
.driver = {
.name = "cs42l73",
.owner = THIS_MODULE,
.of_match_table = cs42l73_of_match,
},
.id_table = cs42l73_id,
.probe = cs42l73_i2c_probe,