mfd: twl6040: Switch to using gpiod API

This patch switches the dirver from legacy gpio API to a newer gpiod
API so that we can eventually drop the former.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20220926054421.1546436-4-dmitry.torokhov@gmail.com

drivers/mfd/twl6040.c

@@ -17,9 +17,8 @@
 #include <linux/platform_device.h>
 #include <linux/of.h>
 #include <linux/of_irq.h>
-#include <linux/of_gpio.h>
 #include <linux/of_platform.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/delay.h>
 #include <linux/i2c.h>
 #include <linux/regmap.h>
@@ -251,7 +250,7 @@ static int twl6040_power_up_automatic(struct twl6040 *twl6040)
 {
 	int time_left;
 
-	gpio_set_value(twl6040->audpwron, 1);
+	gpiod_set_value_cansleep(twl6040->audpwron, 1);
 
 	time_left = wait_for_completion_timeout(&twl6040->ready,
 						msecs_to_jiffies(144));
@@ -262,7 +261,7 @@ static int twl6040_power_up_automatic(struct twl6040 *twl6040)
 		intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID);
 		if (!(intid & TWL6040_READYINT)) {
 			dev_err(twl6040->dev, "automatic power-up failed\n");
-			gpio_set_value(twl6040->audpwron, 0);
+			gpiod_set_value_cansleep(twl6040->audpwron, 0);
 			return -ETIMEDOUT;
 		}
 	}
@@ -290,7 +289,7 @@ int twl6040_power(struct twl6040 *twl6040, int on)
 		/* Allow writes to the chip */
 		regcache_cache_only(twl6040->regmap, false);
 
-		if (gpio_is_valid(twl6040->audpwron)) {
+		if (twl6040->audpwron) {
 			/* use automatic power-up sequence */
 			ret = twl6040_power_up_automatic(twl6040);
 			if (ret) {
@@ -337,9 +336,9 @@ int twl6040_power(struct twl6040 *twl6040, int on)
 		if (--twl6040->power_count)
 			goto out;
 
-		if (gpio_is_valid(twl6040->audpwron)) {
+		if (twl6040->audpwron) {
 			/* use AUDPWRON line */
-			gpio_set_value(twl6040->audpwron, 0);
+			gpiod_set_value_cansleep(twl6040->audpwron, 0);
 
 			/* power-down sequence latency */
 			usleep_range(500, 700);
@@ -711,18 +710,16 @@ static int twl6040_probe(struct i2c_client *client)
 	}
 
 	/* ERRATA: Automatic power-up is not possible in ES1.0 */
-	if (twl6040_get_revid(twl6040) > TWL6040_REV_ES1_0)
-		twl6040->audpwron = of_get_named_gpio(node,
-						      "ti,audpwron-gpio", 0);
-	else
-		twl6040->audpwron = -EINVAL;
-
-	if (gpio_is_valid(twl6040->audpwron)) {
-		ret = devm_gpio_request_one(&client->dev, twl6040->audpwron,
-					    GPIOF_OUT_INIT_LOW, "audpwron");
+	if (twl6040_get_revid(twl6040) > TWL6040_REV_ES1_0) {
+		twl6040->audpwron = devm_gpiod_get_optional(&client->dev,
+							    "ti,audpwron",
+							    GPIOD_OUT_LOW);
+		ret = PTR_ERR_OR_ZERO(twl6040->audpwron);
 		if (ret)
 			goto gpio_err;
 
+		gpiod_set_consumer_name(twl6040->audpwron, "audpwron");
+
 		/* Clear any pending interrupt */
 		twl6040_reg_read(twl6040, TWL6040_REG_INTID);
 	}

include/linux/mfd/twl6040.h

@@ -196,13 +196,14 @@ struct twl6040_gpo_data {
 };
 
 struct twl6040_platform_data {
-	int audpwron_gpio;	/* audio power-on gpio */
+	struct gpio_desc *audpwron_gpio;	/* audio power-on gpio */
 
 	struct twl6040_codec_data *codec;
 	struct twl6040_vibra_data *vibra;
 	struct twl6040_gpo_data *gpo;
 };
 
+struct gpio_desc;
 struct regmap;
 struct regmap_irq_chips_data;
 
@@ -218,7 +219,7 @@ struct twl6040 {
 	struct mfd_cell cells[TWL6040_CELLS];
 	struct completion ready;
 
-	int audpwron;
+	struct gpio_desc *audpwron;
 	int power_count;
 	int rev;