board/shields: x-nucleo-iks01a3: (FIX) use INT2 for LSM6DSO DRDY

[avisconti]

On LSM6DSO sensor the INT1 pin is used for both generating the drdy
interrupt and for switching to I3C hotjoin mode just after reset if
it is at logical '1' level. If you reset the x_nucleo_shield3 board
the LSM6DSO enter in hot join, as INT1 '1' level is preserved by
the level shifter.

This commit switch to INT2 to generate DRDY interrupt, so that INT1
always remain to logical '0' level.

Fixes: #20933

Signed-off-by: Armando Visconti [email protected]

[erwango]

@avisconti, is that fixing an already known issue ?

[avisconti]

@avisconti, is that fixing an already known issue ?

@erwango
Yes, it is a known issue on LSM6DSO and the fact that it is entering I3C hot join state by mistake. This is due to the fact that when INT1 is used as source for DRDY interrupt the '1' is preserved by the level shifter (if any, but on shield3 we have it) and if you press the reset button the INT1 pin is configured as input and the '1' is switching the sensor to hot join state.
Solution prposed by this commit: use INT2 as source of drdy interrrupts, so that int1 remains always to '0'.

[avisconti]

@pabigot
Maybe you can test it on your solution (nrf52_pca10040) as well. Thanks!

[pabigot]

Works with nrf52_pca10040 and iks01a3 shield. Soft reset and reflash both run without locking up.

[erwango]

@avisconti, can you create a matching issue so we can get this in v2.1 ?

[avisconti]

@avisconti, can you create a matching issue so we can get this in v2.1 ?

Yes, sure.

[avisconti]

Just repushed including the reference to the #20933 bug in the commit message.