ASoC: codecs: adau1373: add powerdown gpio

If the powerdown GPIO is specified, we use it for reset. Otherwise,
fallback to a software reset.

Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Link: https://patch.msgid.link/20241028-adau1373-shutdown-v2-4-647f56bbd182@analog.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/adau1373.c b/sound/soc/codecs/adau1373.c
index 9568ff933e12ba939134a696c8d9c16a2ef04795..16b9b265834179087252157a164765c56ed292eb 100644 (file)
--- a/sound/soc/codecs/adau1373.c
+++ b/sound/soc/codecs/adau1373.c
@@ -8,6 +8,7 @@
 
 #include <linux/module.h>
 #include <linux/init.h>
+#include <linux/gpio/consumer.h>
 #include <linux/delay.h>
 #include <linux/pm.h>
 #include <linux/property.h>
@@ -1485,6 +1486,11 @@ static const struct snd_soc_component_driver adau1373_component_driver = {
        .endianness             = 1,
 };
 
+static void adau1373_reset(void *reset_gpio)
+{
+       gpiod_set_value_cansleep(reset_gpio, 1);
+}
+
 static int adau1373_parse_fw(struct device *dev, struct adau1373 *adau1373)
 {
        int ret, drc_count;
@@ -1547,6 +1553,7 @@ static int adau1373_parse_fw(struct device *dev, struct adau1373 *adau1373)
 static int adau1373_i2c_probe(struct i2c_client *client)
 {
        struct adau1373 *adau1373;
+       struct gpio_desc *gpiod;
        int ret;
 
        adau1373 = devm_kzalloc(&client->dev, sizeof(*adau1373), GFP_KERNEL);
@@ -1558,7 +1565,26 @@ static int adau1373_i2c_probe(struct i2c_client *client)
        if (IS_ERR(adau1373->regmap))
                return PTR_ERR(adau1373->regmap);
 
-       regmap_write(adau1373->regmap, ADAU1373_SOFT_RESET, 0x00);
+       /*
+        * If the powerdown GPIO is specified, we use it for reset. Otherwise
+        * a software reset is done.
+        */
+       gpiod = devm_gpiod_get_optional(&client->dev, "powerdown",
+                                       GPIOD_OUT_HIGH);
+       if (IS_ERR(gpiod))
+               return PTR_ERR(gpiod);
+
+       if (gpiod) {
+               gpiod_set_value_cansleep(gpiod, 0);
+               fsleep(10);
+
+               ret = devm_add_action_or_reset(&client->dev, adau1373_reset,
+                                              gpiod);
+               if (ret)
+                       return ret;
+       } else {
+               regmap_write(adau1373->regmap, ADAU1373_SOFT_RESET, 0x00);
+       }
 
        dev_set_drvdata(&client->dev, adau1373);