linux-kernel - RE: [PATCH v7 1/6] typec: tcpm: Add core support for sink side PPS

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Message-ID: <2E89032DDAA8B9408CB92943514A0337014C1E6D83@SW-EX-MBX01.diasemi.com>
Date:   Mon, 23 Apr 2018 12:47:47 +0000
From:   Adam Thomson <Adam.Thomson.Opensource@...semi.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Adam Thomson <Adam.Thomson.Opensource@...semi.com>
CC:     Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Sebastian Reichel <sre@...nel.org>,
        Hans de Goede <hdegoede@...hat.com>, Jun Li <jun.li@....com>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Support Opensource <Support.Opensource@...semi.com>
Subject: RE: [PATCH v7 1/6] typec: tcpm: Add core support for sink side PPS

On 23 April 2018 12:28, Greg Kroah-Hartman wrote:

> On Mon, Apr 23, 2018 at 11:06:25AM +0000, Adam Thomson wrote:
> > On 23 April 2018 09:25, Greg Kroah-Hartman wrote:
> >
> > > On Mon, Apr 23, 2018 at 07:49:38AM +0000, Adam Thomson wrote:
> > > > On 22 April 2018 21:58, Adam Thomson wrote:
> > > >
> > > > > On 22 April 2018 15:05, Greg Kroah-Hartman wrote:
> > > > >
> > > > > > On Fri, Mar 23, 2018 at 10:12:20AM +0000, Adam Thomson wrote:
> > > > > > > This commit adds code to handle requesting of PPS APDOs. Switching
> > > > > > > between standard PDOs and APDOs, and re-requesting an APDO to
> > > > > > > modify operating voltage/current will be triggered by an
> > > > > > > external call into TCPM.
> > > > > > >
> > > > > > > Signed-off-by: Adam Thomson
> <Adam.Thomson.Opensource@...semi.com>
> > > > > > > Acked-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
> > > > > > > Reviewed-by: Guenter Roeck <linux@...ck-us.net>
> > > > > > > ---
> > > > > > >  drivers/usb/typec/tcpm.c | 517
> > > > > > ++++++++++++++++++++++++++++++++++++++++++++++-
> > > > > > >  include/linux/usb/pd.h   |   4 +-
> > > > > > >  include/linux/usb/tcpm.h |   1 +
> > > > > > >  3 files changed, 509 insertions(+), 13 deletions(-)
> > > > > >
> > > > > > This patch adds build warnings to the tree, so I can't take it, sorry.
> > > > > > Please fix up and resend.
> > > > >
> > > > > No problem. Sorry for that. Will take a look and resolve the warnings.
> > > >
> > > > Sadly this is going to be a bit more than 'resolve the warnings' task now as Jun
> > > > Li's patch set has now made it in before me which means I need to rebase PDO
> > > > Selection because of his changes. :(
> > >
> > > Someone was going to have to do that, sorry :(
> >
> > Just as an FYI, this patch will produce warnings until the associated
> > power_supply interface patch (number 5 in the series previously sent) is
> > included as that makes use of the new API. Not sure how I can get around that
> > so I guess we have to wait on Sebastian to give the nod for the rest of the
> > power_supply patches before this can make it through.
> 
> That's not good.  There has to be a way to prevent a build warning from
> happening...

If we're ok with '__maybe_unused' then I can add that. Wasn't sure if something
like that would be acceptable for this scenario.