linux-kernel - [PATCH v2] iio: adis: set GPIO reset pin direction

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Message-Id: <20210708095425.13295-1-detegr@rbx.email>
Date:   Thu,  8 Jul 2021 12:54:29 +0300
From:   Antti Keränen <detegr@....email>
To:     linux-iio@...r.kernel.org
Cc:     Antti Keränen <detegr@....email>,
        Hannu Hartikainen <hannu@...k.in>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Michael Hennerich <Michael.Hennerich@...log.com>,
        Nuno Sa <nuno.sa@...log.com>,
        Jonathan Cameron <jic23@...nel.org>,
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v2] iio: adis: set GPIO reset pin direction

Set reset pin direction to output as the reset pin needs to be an active
low output pin.

Co-developed-by: Hannu Hartikainen <hannu@...k.in>
Signed-off-by: Hannu Hartikainen <hannu@...k.in>
Signed-off-by: Antti Keränen <detegr@....email>
---
Removed unnecessary toggling of the pin as requested by Lars-Peter. I
missed out on the conversation, but I agree this is better.

 drivers/iio/imu/adis.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/iio/imu/adis.c b/drivers/iio/imu/adis.c
index 319b64b2fd88..f8b7837d8b8f 100644
--- a/drivers/iio/imu/adis.c
+++ b/drivers/iio/imu/adis.c
@@ -415,12 +415,11 @@ int __adis_initial_startup(struct adis *adis)
 	int ret;
 
 	/* check if the device has rst pin low */
-	gpio = devm_gpiod_get_optional(&adis->spi->dev, "reset", GPIOD_ASIS);
+	gpio = devm_gpiod_get_optional(&adis->spi->dev, "reset", GPIOD_OUT_HIGH);
 	if (IS_ERR(gpio))
 		return PTR_ERR(gpio);
 
 	if (gpio) {
-		gpiod_set_value_cansleep(gpio, 1);
 		msleep(10);
 		/* bring device out of reset */
 		gpiod_set_value_cansleep(gpio, 0);
-- 
2.32.0