[PATCH v4 08/10] input: keyboard: adp5588-keys: add optional reset gpio

From: "Nuno Sá" <nuno.sa@analog.com>
To: linux-kernel@vger.kernel.org,
	"Bartosz Golaszewski" <brgl@bgdev.pl>,
	"Dmitry Torokhov" <dmitry.torokhov@gmail.com>,
	devicetree@vger.kernel.org, linux-gpio@vger.kernel.org,
	"Linus Walleij" <linus.walleij@linaro.org>,
	linux-input@vger.kernel.org, "Nuno Sá" <nuno.sa@analog.com>
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>,
	Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Michael Hennerich <michael.hennerich@analog.com>
Subject: [PATCH v4 08/10] input: keyboard: adp5588-keys: add optional reset gpio
Date: Mon, 29 Aug 2022 15:15:51 +0200	[thread overview]
Message-ID: <20220829131553.690063-9-nuno.sa@analog.com> (raw)
In-Reply-To: <20220829131553.690063-1-nuno.sa@analog.com>

Optionally reset the device during probe.

Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
---
 drivers/input/keyboard/adp5588-keys.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/input/keyboard/adp5588-keys.c b/drivers/input/keyboard/adp5588-keys.c
index 3a234ec37fd4..b2bb7c6702e1 100644
--- a/drivers/input/keyboard/adp5588-keys.c
+++ b/drivers/input/keyboard/adp5588-keys.c
@@ -11,6 +11,7 @@
 #include <linux/bits.h>
 #include <linux/delay.h>
 #include <linux/errno.h>
+#include <linux/gpio/consumer.h>
 #include <linux/gpio/driver.h>
 #include <linux/i2c.h>
 #include <linux/input.h>
@@ -715,6 +716,7 @@ static int adp5588_probe(struct i2c_client *client,
 {
 	struct adp5588_kpad *kpad;
 	struct input_dev *input;
+	struct gpio_desc *gpio;
 	unsigned int revid;
 	int ret;
 	int error;
@@ -740,6 +742,16 @@ static int adp5588_probe(struct i2c_client *client,
 	if (error)
 		return error;
 
+	gpio = devm_gpiod_get_optional(&client->dev, "reset", GPIOD_OUT_HIGH);
+	if (IS_ERR(gpio))
+		return PTR_ERR(gpio);
+
+	if (gpio) {
+		fsleep(30);
+		gpiod_set_value_cansleep(gpio, 0);
+		fsleep(60);
+	}
+
 	ret = adp5588_read(client, DEV_ID);
 	if (ret < 0)
 		return ret;
-- 
2.37.2

