Re: [PATCH v2] iio: sx9310: Prefer async probe

From: Stephen Boyd
Date: Tue Sep 01 2020 - 12:02:22 EST


Quoting Douglas Anderson (2020-09-01 08:19:43)
> On one board I found that:
> probe of 5-0028 returned 1 after 259547 usecs
>
> While some of this time is attributable to the pile of i2c transfers
> that we do at probe time, the lion's share (over 200 ms) is sitting
> waiting in the polling loop in sx9310_init_compensation() waiting for
> the hardware to indicate that it's done.
>
> There's no reason to block probe of all other devices on our probe.
> Turn on async probe.
>
> Signed-off-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
> ---

Reviewed-by: Stephen Boyd <swboyd@xxxxxxxxxxxx>