From 08808b3ef384974b1eaf4975de707f93f8cda62d Mon Sep 17 00:00:00 2001 From: =?utf8?q?Uwe=20Kleine-K=C3=B6nig?= Date: Thu, 27 Feb 2025 12:35:28 +0100 Subject: [PATCH] iio: adc: ad7192: Grab direct mode for calibration MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit While a calibration is running, better don't make the device do anything else. To enforce that, grab direct mode during calibration. Fixes: 42776c14c692 ("staging: iio: adc: ad7192: Add system calibration support") Signed-off-by: Uwe Kleine-König Link: https://patch.msgid.link/8aade802afca6a89641e24c1ae1d4b8d82cff58d.1740655250.git.u.kleine-koenig@baylibre.com Signed-off-by: Jonathan Cameron --- drivers/iio/adc/ad7192.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/iio/adc/ad7192.c b/drivers/iio/adc/ad7192.c index f6150b905286f..15dc6e6854e83 100644 --- a/drivers/iio/adc/ad7192.c +++ b/drivers/iio/adc/ad7192.c @@ -257,6 +257,9 @@ static ssize_t ad7192_write_syscalib(struct iio_dev *indio_dev, if (ret) return ret; + if (!iio_device_claim_direct(indio_dev)) + return -EBUSY; + temp = st->syscalib_mode[chan->channel]; if (sys_calib) { if (temp == AD7192_SYSCALIB_ZERO_SCALE) @@ -267,6 +270,8 @@ static ssize_t ad7192_write_syscalib(struct iio_dev *indio_dev, chan->address); } + iio_device_release_direct(indio_dev); + return ret ? ret : len; } -- 2.47.3