diff options
| author | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-02-06 19:03:09 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-08 14:40:24 +0200 |
| commit | b5db33a81ee7acf557dabf03ada137e6e5d5a278 (patch) | |
| tree | c1e4bec8585d6920f19aeee303a9a0eb1f5173bc /drivers/staging | |
| parent | f5b01abf5f6529936d2c7932f8567100faaae635 (diff) | |
staging:iio:adc:ad7280a: Fix handing of device address bit reversing.
[ Upstream commit f281e4ddbbc0b60f061bc18a2834e9363ba85f9f ]
The bit reversal was wrong for bits 1 and 3 of the 5 bits.
Result is driver failure to probe if you have more than 2 daisy-chained
devices. Discovered via QEMU based device emulation.
Fixes tag is for when this moved from a macro to a function, but it
was broken before that.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Fixes: 065a7c0b1fec ("Staging: iio: adc: ad7280a.c: Fixed Macro argument reuse")
Reviewed-by: Marcelo Schmitt <marcelo.schmitt1@gmail.com>
Link: https://lore.kernel.org/r/20220206190328.333093-2-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/staging')
| -rw-r--r-- | drivers/staging/iio/adc/ad7280a.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/staging/iio/adc/ad7280a.c b/drivers/staging/iio/adc/ad7280a.c index fef0055b8990..20183b2ea127 100644 --- a/drivers/staging/iio/adc/ad7280a.c +++ b/drivers/staging/iio/adc/ad7280a.c @@ -107,9 +107,9 @@ static unsigned int ad7280a_devaddr(unsigned int addr) { return ((addr & 0x1) << 4) | - ((addr & 0x2) << 3) | + ((addr & 0x2) << 2) | (addr & 0x4) | - ((addr & 0x8) >> 3) | + ((addr & 0x8) >> 2) | ((addr & 0x10) >> 4); } |