linux-kernel - Re: [PATCH 0/3] stagging:iio:meter: Add essential IIO API structures for ADE7854

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Date:   Mon, 23 Apr 2018 20:42:55 -0300
From:   Rodrigo Siqueira <rodrigosiqueiramelo@...il.com>
To:     Jonathan Cameron <jic23@...nel.org>
Cc:     Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        John Syne <john3909@...il.com>, linux-iio@...r.kernel.org,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/3] stagging:iio:meter: Add essential IIO API structures
 for ADE7854

Hi Jonathan,

Thanks for all the feedbacks and sorry for some basic mistakes, I will
work on the second version based on all your comments.

Best Regards
Rodrigo Siqueira

On 04/21, Jonathan Cameron wrote:
> On Sat, 21 Apr 2018 08:54:45 -0300
> Rodrigo Siqueira <rodrigosiqueiramelo@...il.com> wrote:
> 
> > This patchset aims to update ADE7854 by adding the required IIO API
> > components. The first patch adds the iio_chan_spec for handling seven
> > different registers (all of them with a similar behavior). The second
> > patch appends the read_raw function defined by the IIO API. Finally, the
> > third patch adds the write_raw function and remove the attributes used
> > for handling the seven registers. This patchset has the contribution of
> > John Syne, which was responsible for mapping the correct ABI name per
> > element in the ADE7854; additionally, John provided codes that helped to
> > shape these patches.
> > 
> > Rodrigo Siqueira (3):
> >   stagging:iio:meter: Add iio_chan_spec
> >   stagging:iio:meter: Add ade7854_read_raw function
> >   stagging:iio:meter: Add ade7854_write_raw function
> > 
> >  drivers/staging/iio/meter/ade7854.c | 129 ++++++++++++++++++++--------
> >  1 file changed, 94 insertions(+), 35 deletions(-)
> > 
> Hi Rodrigo,
> 
> Please don't do it like this.   The original discussion with John
> involved the addition of an extra chunk of core logic so we would have
> the ability to specify the channel without using extended_name.
> 
> Extended name is not intended to differentiate between channels (it
> isn't in general enough to do so - though it works in this little
> corner case of sysfs attributes like you have here).
> 
> So the plan is to add another field to the iio_chan_spec structure
> to allow for the complexity we need.  See the long discussions
> over how we represent the myriad of channels in here.
> 
> If you need some pointers, feel free to ask but it may take
> me a little while to put together a full description of what needs
> doing.
> 
> I'll put a few more direct comments in the individual patches.
> 
> Thanks,
> 
> Jonathan
>