Input: adp5588-keys - add optional reset gpio

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>
Link: https://lore.kernel.org/r/20220829131553.690063-9-nuno.sa@analog.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/keyboard/adp5588-keys.c b/drivers/input/keyboard/adp5588-keys.c
index 565123e5894bbebfcb60143d4c0b54a07d11becc..950abc1c25a33ccc93488694bcd400d73957c490 100644 (file)
--- 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>
@@ -716,6 +717,7 @@ 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;
@@ -741,6 +743,16 @@ 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;