linux-kernel - [PATCH v4 09/10] input: keyboard: adp5588-keys: add regulator support

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Date:   Mon, 29 Aug 2022 15:15:52 +0200
From:   Nuno Sá <nuno.sa@...log.com>
To:     <linux-kernel@...r.kernel.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        <devicetree@...r.kernel.org>, <linux-gpio@...r.kernel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        <linux-input@...r.kernel.org>,
        Nuno Sá <nuno.sa@...log.com>
CC:     Andy Shevchenko <andy.shevchenko@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Michael Hennerich <michael.hennerich@...log.com>
Subject: [PATCH v4 09/10] input: keyboard: adp5588-keys: add regulator support

Support feeding VCC through a regulator.

Signed-off-by: Nuno Sá <nuno.sa@...log.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>
---
 drivers/input/keyboard/adp5588-keys.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/input/keyboard/adp5588-keys.c b/drivers/input/keyboard/adp5588-keys.c
index b2bb7c6702e1..0e6f4a47bb9c 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>
 
@@ -711,12 +712,18 @@ 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;
@@ -742,6 +749,18 @@ 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);
+
+	ret = regulator_enable(vcc);
+	if (ret)
+		return ret;
+
+	ret = devm_add_action_or_reset(&client->dev, adp5588_disable_regulator, vcc);
+	if (ret)
+		return ret;
+
 	gpio = devm_gpiod_get_optional(&client->dev, "reset", GPIOD_OUT_HIGH);
 	if (IS_ERR(gpio))
 		return PTR_ERR(gpio);
-- 
2.37.2