[PATCH 02/11] ASoC: max98373: switch to using gpiod API

[Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>]

Switch the driver from legacy gpio API that is deprecated to the newer
gpiod API that respects line polarities described in ACPI/DT.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
---
 sound/soc/codecs/max98373-i2c.c | 39 +++++++++++++++++++--------------
 sound/soc/codecs/max98373.c     | 18 ---------------
 sound/soc/codecs/max98373.h     |  1 -
 3 files changed, 22 insertions(+), 36 deletions(-)

diff --git a/sound/soc/codecs/max98373-i2c.c b/sound/soc/codecs/max98373-i2c.c
index 3e04c7f0cce4..969cdca83bc1 100644
--- a/sound/soc/codecs/max98373-i2c.c
+++ b/sound/soc/codecs/max98373-i2c.c
@@ -3,12 +3,12 @@
 
 #include <linux/acpi.h>
 #include <linux/delay.h>
-#include <linux/gpio.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
 #include <linux/i2c.h>
 #include <linux/module.h>
 #include <linux/mod_devicetable.h>
 #include <linux/of.h>
-#include <linux/of_gpio.h>
 #include <linux/pm_runtime.h>
 #include <linux/regmap.h>
 #include <linux/slab.h>
@@ -520,14 +520,13 @@ static int max98373_i2c_probe(struct i2c_client *i2c)
 	int ret = 0;
 	int reg = 0;
 	int i;
-	struct max98373_priv *max98373 = NULL;
+	struct max98373_priv *max98373;
+	struct gpio_desc *reset_gpio;
 
 	max98373 = devm_kzalloc(&i2c->dev, sizeof(*max98373), GFP_KERNEL);
+	if (!max98373)
+		return -ENOMEM;
 
-	if (!max98373) {
-		ret = -ENOMEM;
-		return ret;
-	}
 	i2c_set_clientdata(i2c, max98373);
 
 	/* update interleave mode info */
@@ -557,17 +556,23 @@ static int max98373_i2c_probe(struct i2c_client *i2c)
 	max98373_slot_config(&i2c->dev, max98373);
 
 	/* Power on device */
-	if (gpio_is_valid(max98373->reset_gpio)) {
-		ret = devm_gpio_request(&i2c->dev, max98373->reset_gpio,
-					"MAX98373_RESET");
-		if (ret) {
-			dev_err(&i2c->dev, "%s: Failed to request gpio %d\n",
-				__func__, max98373->reset_gpio);
-			return -EINVAL;
-		}
-		gpio_direction_output(max98373->reset_gpio, 0);
+	/* Acquire and assert reset line */
+	reset_gpio = devm_gpiod_get_optional(&i2c->dev, "maxim,reset",
+					     GPIOD_OUT_HIGH);
+	ret = PTR_ERR_OR_ZERO(reset_gpio);
+	if (ret) {
+		dev_err(&i2c->dev, "%s: Failed to request reset gpio: %d\n",
+			__func__, ret);
+		return ret;
+	}
+
+	gpiod_set_consumer_name(reset_gpio, "MAX98373_RESET");
+
+	if (reset_gpio) {
+		/* Keep line asserted to reset device */
 		msleep(50);
-		gpio_direction_output(max98373->reset_gpio, 1);
+		/* Deassert reset line */
+		gpiod_set_value_cansleep(reset_gpio, 0);
 		msleep(20);
 	}
 
diff --git a/sound/soc/codecs/max98373.c b/sound/soc/codecs/max98373.c
index f90a6a7ba83b..401546c1084e 100644
--- a/sound/soc/codecs/max98373.c
+++ b/sound/soc/codecs/max98373.c
@@ -12,9 +12,6 @@
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
 #include <sound/soc.h>
-#include <linux/gpio.h>
-#include <linux/of.h>
-#include <linux/of_gpio.h>
 #include <sound/tlv.h>
 #include "max98373.h"
 
@@ -478,21 +475,6 @@ void max98373_slot_config(struct device *dev,
 		max98373->i_slot = value & 0xF;
 	else
 		max98373->i_slot = 1;
-	if (dev->of_node) {
-		max98373->reset_gpio = of_get_named_gpio(dev->of_node,
-						"maxim,reset-gpio", 0);
-		if (!gpio_is_valid(max98373->reset_gpio)) {
-			dev_err(dev, "Looking up %s property in node %s failed %d\n",
-				"maxim,reset-gpio", dev->of_node->full_name,
-				max98373->reset_gpio);
-		} else {
-			dev_dbg(dev, "maxim,reset-gpio=%d",
-				max98373->reset_gpio);
-		}
-	} else {
-		/* this makes reset_gpio as invalid */
-		max98373->reset_gpio = -1;
-	}
 
 	if (!device_property_read_u32(dev, "maxim,spkfb-slot-no", &value))
 		max98373->spkfb_slot = value & 0xF;
diff --git a/sound/soc/codecs/max98373.h b/sound/soc/codecs/max98373.h
index e1810b3b1620..7b259789e1be 100644
--- a/sound/soc/codecs/max98373.h
+++ b/sound/soc/codecs/max98373.h
@@ -213,7 +213,6 @@ struct max98373_cache {
 
 struct max98373_priv {
 	struct regmap *regmap;
-	int reset_gpio;
 	unsigned int v_slot;
 	unsigned int i_slot;
 	unsigned int spkfb_slot;
-- 
2.38.1.431.g37b22c650d-goog