ASoC: ak4458: add optional reset control to instead of gpio

Add optional reset control instead of GPIO to manage codec
PDN pin.

As there is reference counter for reset control, so need
to remove one ak4458_reset in runtime resume to make the
reference counter balance.

Signed-off-by: Viorel Suman <viorel.suman@nxp.com>
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://lore.kernel.org/r/1665664611-21350-1-git-send-email-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/ak4458.c b/sound/soc/codecs/ak4458.c
index 1db7355..8c69c8c 100644 (file)
--- a/sound/soc/codecs/ak4458.c
+++ b/sound/soc/codecs/ak4458.c
@@ -13,6 +13,7 @@
 #include <linux/of_gpio.h>
 #include <linux/pm_runtime.h>
 #include <linux/regulator/consumer.h>
+#include <linux/reset.h>
 #include <linux/slab.h>
 #include <sound/initval.h>
 #include <sound/pcm_params.h>
@@ -46,6 +47,7 @@ struct ak4458_priv {
        struct device *dev;
        struct regmap *regmap;
        struct gpio_desc *reset_gpiod;
+       struct reset_control *reset;
        struct gpio_desc *mute_gpiod;
        int digfil;     /* SSLOW, SD, SLOW bits */
        int fs;         /* sampling rate */
@@ -633,6 +635,12 @@ static void ak4458_reset(struct ak4458_priv *ak4458, bool active)
        if (ak4458->reset_gpiod) {
                gpiod_set_value_cansleep(ak4458->reset_gpiod, active);
                usleep_range(1000, 2000);
+       } else if (!IS_ERR_OR_NULL(ak4458->reset)) {
+               if (active)
+                       reset_control_assert(ak4458->reset);
+               else
+                       reset_control_deassert(ak4458->reset);
+               usleep_range(1000, 2000);
        }
 }
 
@@ -668,7 +676,6 @@ static int __maybe_unused ak4458_runtime_resume(struct device *dev)
        if (ak4458->mute_gpiod)
                gpiod_set_value_cansleep(ak4458->mute_gpiod, 1);
 
-       ak4458_reset(ak4458, true);
        ak4458_reset(ak4458, false);
 
        regcache_cache_only(ak4458->regmap, false);
@@ -748,6 +755,10 @@ static int ak4458_i2c_probe(struct i2c_client *i2c)
 
        ak4458->drvdata = of_device_get_match_data(&i2c->dev);
 
+       ak4458->reset = devm_reset_control_get_optional_shared(ak4458->dev, NULL);
+       if (IS_ERR(ak4458->reset))
+               return PTR_ERR(ak4458->reset);
+
        ak4458->reset_gpiod = devm_gpiod_get_optional(ak4458->dev, "reset",
                                                      GPIOD_OUT_LOW);
        if (IS_ERR(ak4458->reset_gpiod))