[PATCH 4/9] iio: adc: rzt2h: claim direct mode on single reads
From: Cosmin Tanislav <cosmin-gabriel.tanislav.xa@renesas.com>
Date: 2026-08-28 15:01:17
Also in:
linux-iio, linux-renesas-soc, lkml
Subsystem:
iio subsystem and drivers, renesas rz/t2h / rz/n2h a/d driver, the rest · Maintainers:
Jonathan Cameron, Cosmin Tanislav, Linus Torvalds
Claim direct mode around the single read to prevent it from conflicting with an ongoing buffered read. Signed-off-by: Cosmin Tanislav <cosmin-gabriel.tanislav.xa@renesas.com> --- drivers/iio/adc/rzt2h_adc.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/adc/rzt2h_adc.c b/drivers/iio/adc/rzt2h_adc.c
index 995308a419f1..95bcebdc02cb 100644
--- a/drivers/iio/adc/rzt2h_adc.c
+++ b/drivers/iio/adc/rzt2h_adc.c@@ -158,8 +158,13 @@ static int rzt2h_adc_read_raw(struct iio_dev *indio_dev, struct rzt2h_adc *adc = iio_priv(indio_dev); switch (mask) { - case IIO_CHAN_INFO_RAW: + case IIO_CHAN_INFO_RAW: { + IIO_DEV_ACQUIRE_DIRECT_MODE(indio_dev, claim); + if (IIO_DEV_ACQUIRE_FAILED(claim)) + return -EBUSY; + return rzt2h_adc_read_single(adc, chan->channel, val); + } case IIO_CHAN_INFO_SCALE: *val = 1800; *val2 = 12;
--
2.55.0