linux-kernel - Re: [PATCH v2] iio: sx9310: Prefer async probe

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Date:   Sun, 6 Sep 2020 16:22:34 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Daniel Campello <campello@...omium.org>
Cc:     Stephen Boyd <swboyd@...omium.org>,
        Douglas Anderson <dianders@...omium.org>,
        Alexandru Ardelean <alexandru.ardelean@...log.com>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        linux-iio <linux-iio@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] iio: sx9310: Prefer async probe

On Tue, 1 Sep 2020 11:01:29 -0600
Daniel Campello <campello@...omium.org> wrote:

> On Tue, Sep 1, 2020 at 9:43 AM Stephen Boyd <swboyd@...omium.org> wrote:
> >
> > 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@...omium.org>
> > > ---  
> >
> > Reviewed-by: Stephen Boyd <swboyd@...omium.org>  
> 
> Reviewed-by: Daniel Campello <campello@...omium.org>
Applied to the togreg branch of iio.git and pushed out as testing for
the autobuilders to poke at it.

thanks,

Jonathan