From: "Nuno Sá" <nuno.sa@analog.com>
To: <linux-iio@vger.kernel.org>
Cc: Jonathan Cameron <jic23@kernel.org>,
Lars-Peter Clausen <lars@metafoo.de>,
Drew Fustini <drew@pdp7.com>
Subject: [PATCH 1/2] iio: ltc2983: add support for optional reset gpio
Date: Fri, 20 Aug 2021 08:55:34 +0200 [thread overview]
Message-ID: <20210820065535.6994-1-nuno.sa@analog.com> (raw)
Check if an optional reset gpio is present and if so, make sure to reset
the device.
Signed-off-by: Nuno Sá <nuno.sa@analog.com>
---
drivers/iio/temperature/ltc2983.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/iio/temperature/ltc2983.c b/drivers/iio/temperature/ltc2983.c
index 3b4a0e60e605..37903e9fb90f 100644
--- a/drivers/iio/temperature/ltc2983.c
+++ b/drivers/iio/temperature/ltc2983.c
@@ -1470,6 +1470,7 @@ static int ltc2983_probe(struct spi_device *spi)
{
struct ltc2983_data *st;
struct iio_dev *indio_dev;
+ struct gpio_desc *gpio;
const char *name = spi_get_device_id(spi)->name;
int ret;
@@ -1494,6 +1495,16 @@ static int ltc2983_probe(struct spi_device *spi)
if (ret)
return ret;
+ gpio = devm_gpiod_get_optional(&st->spi->dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(gpio))
+ return PTR_ERR(gpio);
+
+ if (gpio) {
+ /* bring device out of reset */
+ usleep_range(1000, 1005);
+ gpiod_set_value_cansleep(gpio, 0);
+ }
+
ret = ltc2983_setup(st, true);
if (ret)
return ret;
--
2.33.0
next reply other threads:[~2021-08-20 6:52 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-20 6:55 Nuno Sá [this message]
2021-08-20 6:55 ` [PATCH 2/2] iio: ltc2983: fail probe if no channels are given Nuno Sá
2021-08-20 8:22 ` Alexandru Ardelean
2021-08-20 8:21 ` [PATCH 1/2] iio: ltc2983: add support for optional reset gpio Alexandru Ardelean
2021-08-20 9:29 ` Sa, Nuno
2021-08-20 18:58 ` Alexandru Ardelean
2021-08-23 7:04 ` Sa, Nuno
2021-08-25 8:24 ` Sa, Nuno
2021-08-23 11:14 ` Andy Shevchenko
2021-08-23 12:51 ` Nuno Sá
2021-08-23 14:27 ` Andy Shevchenko
2021-08-23 14:51 ` Nuno Sá
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