24 Mar
2022
24 Mar
'22
4:59 p.m.
Hi Tim,
On Thu, Mar 24, 2022 at 12:32 PM Tim Harvey tharvey@gateworks.com wrote:
commit 7c84319af9c7 ("dm: gpio: Correct use of -ENODEV in drivers") changed the return code for an I2C NAK from -ENODEV to -EREMOTEIO.
I think we should be consistent with Linux and return -ENXIO for the NACK case: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Docu...
"ENXIO Returned by I2C adapters to indicate that the address phase of a transfer didn't get an ACK. While it might just mean an I2C device was temporarily not responding, usually it means there's nothing listening at that address."