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iio: temperature: ltc2983: Fix n_wires default bypassing rotation check

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commit 434c150752 upstream.

When adi,number-of-wires is absent, n_wires is left at 0. The binding
documents a default of 2 wires, matching the hardware default. However
the current-rotate validation checks n_wires == 2 || n_wires == 3, so
with n_wires = 0 the guard is bypassed and adi,current-rotate is accepted
for a 2-wire RTD.

Initialize n_wires = 2 to match the binding default and ensure the
rotation check fires correctly when the property is absent.

Fixes: f110f3188e ("iio: temperature: Add support for LTC2983")
Signed-off-by: Liviu Stan <liviu.stan@analog.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Liviu Stan
2026-07-18 16:53:09 +02:00
committed by Greg Kroah-Hartman
parent b50344ab20
commit e16258913b
1 changed files with 1 additions and 1 deletions
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drivers/iio/temperature/ltc2983.c
+1 -1
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@@ -741,7 +741,7 @@ ltc2983_rtd_new(const struct fwnode_handle *child, struct ltc2983_data *st,
struct ltc2983_rtd *rtd;
int ret = 0;
struct device *dev = &st->spi->dev;
u32 excitation_current = 0, n_wires = 0;
u32 excitation_current = 0, n_wires = 2;
rtd = devm_kzalloc(dev, sizeof(*rtd), GFP_KERNEL);
if (!rtd)