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| author | David Lechner <dlechner@baylibre.com> | 2025-05-05 21:28:40 +0300 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2025-05-15 19:14:11 +0300 |
| commit | 7cdfbc0113d087348b8e65dd79276d0f57b89a10 (patch) | |
| tree | c3a55a215eae841fe0cb795f50a2c2d9e323d30f /tools/perf/scripts/python/task-analyzer.py | |
| parent | 499a8cee812588905cc940837e69918c1649a19e (diff) | |
| download | linux-7cdfbc0113d087348b8e65dd79276d0f57b89a10.tar.xz | |
iio: adc: ad7944: mask high bits on direct read
Apply a mask to the raw value received over the SPI bus for unsigned
direct reads. As we found recently, SPI controllers may not set unused
bits to 0 when reading with bits_per_word != {8,16,32}. The ad7944 uses
bits_per_word of 14 and 18, so we need to mask the value to be sure we
returning the correct value to userspace during a direct read.
Fixes: d1efcf8871db ("iio: adc: ad7944: add driver for AD7944/AD7985/AD7986")
Signed-off-by: David Lechner <dlechner@baylibre.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Link: https://patch.msgid.link/20250505-iio-adc-ad7944-max-high-bits-on-direct-read-v1-1-b173facceefe@baylibre.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'tools/perf/scripts/python/task-analyzer.py')
0 files changed, 0 insertions, 0 deletions