ASoC: tlv320aic3x: Add reset inverted DT property

Add reset inverted property to allow reset signal
as active high instead of the default active low
polarity.

Change-Id: I27ae32ba296f71b1d989837ada8b4ad8766ba8ba
Signed-off-by: Rajesha Kini <rkini@codeaurora.org>
Signed-off-by: Gustavo Solaira <gustavos@codeaurora.org>

Documentation/devicetree/bindings/sound/tlv320aic3x.txt

@@ -17,7 +17,8 @@ Required properties:
 
 Optional properties:
 
-- gpio-reset - gpio pin number used for codec reset
+- gpio-reset - gpio pin number used for codec reset, default active low
+- reset-inverted - set the reset gpio mode as active high
 - ai3x-gpio-func - <array of 2 int> - AIC3X_GPIO1 & AIC3X_GPIO2 Functionality
 				    - Not supported on tlv320aic3104
 - ai3x-micbias-vg - MicBias Voltage required.

sound/soc/codecs/tlv320aic3x.c

@@ -84,6 +84,7 @@ struct aic3x_priv {
 	struct list_head list;
 	int master;
 	int gpio_reset;
+	bool reset_inverted;
 	int power;
 #define AIC3X_MODEL_3X 0
 #define AIC3X_MODEL_33 1
@@ -1355,7 +1356,8 @@ static int aic3x_regulator_event(struct notifier_block *nb,
 		 * of the supplies was disabled
 		 */
 		if (gpio_is_valid(aic3x->gpio_reset))
-			gpio_set_value(aic3x->gpio_reset, 0);
+			gpio_set_value(aic3x->gpio_reset,
+				       aic3x->reset_inverted);
 		regcache_mark_dirty(aic3x->regmap);
 	}
 
@@ -1377,7 +1379,8 @@ static int aic3x_set_power(struct snd_soc_codec *codec, int power)
 
 		if (gpio_is_valid(aic3x->gpio_reset)) {
 			udelay(1);
-			gpio_set_value(aic3x->gpio_reset, 1);
+			gpio_set_value(aic3x->gpio_reset,
+				       !aic3x->reset_inverted);
 		}
 
 		/* Sync reg_cache with the hardware */
@@ -1810,6 +1813,9 @@ static int aic3x_i2c_probe(struct i2c_client *i2c,
 		else
 			aic3x->gpio_reset = -1;
 
+		aic3x->reset_inverted =
+			of_property_read_bool(np, "reset-inverted");
+
 		if (of_property_read_u32_array(np, "ai3x-gpio-func",
 					ai3x_setup->gpio_func, 2) >= 0) {
 			aic3x->setup = ai3x_setup;
@@ -1846,7 +1852,8 @@ static int aic3x_i2c_probe(struct i2c_client *i2c,
 		ret = gpio_request(aic3x->gpio_reset, "tlv320aic3x reset");
 		if (ret != 0)
 			goto err;
-		gpio_direction_output(aic3x->gpio_reset, 0);
+		gpio_direction_output(aic3x->gpio_reset,
+				      aic3x->reset_inverted);
 	}
 
 	for (i = 0; i < ARRAY_SIZE(aic3x->supplies); i++)
@@ -1894,7 +1901,7 @@ static int aic3x_i2c_remove(struct i2c_client *client)
 	snd_soc_unregister_codec(&client->dev);
 	if (gpio_is_valid(aic3x->gpio_reset) &&
 	    !aic3x_is_shared_reset(aic3x)) {
-		gpio_set_value(aic3x->gpio_reset, 0);
+		gpio_set_value(aic3x->gpio_reset, aic3x->reset_inverted);
 		gpio_free(aic3x->gpio_reset);
 	}
 	return 0;