From 73d4a5423ecee8e108056134c53f82c7a95a90d5 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Nuno=20S=C3=A1?= <nuno.sa@analog.com>
Date: Tue, 30 Aug 2022 21:13:10 -0700
Subject: [PATCH] Input: adp5588-keys - add regulator support
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Support feeding VCC through a regulator.

Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20220829131553.690063-10-nuno.sa@analog.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/keyboard/adp5588-keys.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/input/keyboard/adp5588-keys.c b/drivers/input/keyboard/adp5588-keys.c
index 950abc1..1db6b28 100644
--- a/drivers/input/keyboard/adp5588-keys.c
+++ b/drivers/input/keyboard/adp5588-keys.c
@@ -24,6 +24,7 @@
 #include <linux/pinctrl/pinconf-generic.h>
 #include <linux/platform_device.h>
 #include <linux/pm.h>
+#include <linux/regulator/consumer.h>
 #include <linux/slab.h>
 #include <linux/timekeeping.h>
 
@@ -712,12 +713,18 @@ static int adp5588_fw_parse(struct adp5588_kpad *kpad)
 	return 0;
 }
 
+static void adp5588_disable_regulator(void *reg)
+{
+	regulator_disable(reg);
+}
+
 static int adp5588_probe(struct i2c_client *client,
 			 const struct i2c_device_id *id)
 {
 	struct adp5588_kpad *kpad;
 	struct input_dev *input;
 	struct gpio_desc *gpio;
+	struct regulator *vcc;
 	unsigned int revid;
 	int ret;
 	int error;
@@ -743,6 +750,19 @@ static int adp5588_probe(struct i2c_client *client,
 	if (error)
 		return error;
 
+	vcc = devm_regulator_get(&client->dev, "vcc");
+	if (IS_ERR(vcc))
+		return PTR_ERR(vcc);
+
+	error = regulator_enable(vcc);
+	if (error)
+		return error;
+
+	error = devm_add_action_or_reset(&client->dev,
+					 adp5588_disable_regulator, vcc);
+	if (error)
+		return error;
+
 	gpio = devm_gpiod_get_optional(&client->dev, "reset", GPIOD_OUT_HIGH);
 	if (IS_ERR(gpio))
 		return PTR_ERR(gpio);
-- 
2.7.4