ASoC: codecs: adau1701: add DT bindings
Apart from pure matching, the bindings also support setting the the
reset gpio line.
Signed-off-by: Daniel Mack <[email protected]>
Acked-by: Lars-Peter Clausen <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
diff --git a/sound/soc/codecs/adau1701.c b/sound/soc/codecs/adau1701.c
index 95e1677..3fc1763 100644
--- a/sound/soc/codecs/adau1701.c
+++ b/sound/soc/codecs/adau1701.c
@@ -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 @@
.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 @@
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 @@
.driver = {
.name = "adau1701",
.owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(adau1701_dt_ids),
},
.probe = adau1701_i2c_probe,
.remove = adau1701_i2c_remove,
