linux-kernel - Re: [PATCH] serial: st-asc: Use new GPIOD API to obtain RTS pin

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Date:   Wed, 08 Feb 2017 21:42:47 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Greg KH <greg@...ah.com>
Cc:     kbuild test robot <lkp@...el.com>,
        Lee Jones <lee.jones@...aro.org>, kbuild-all@...org,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Alexander Stein <alexander.stein@...tec-electronic.com>
Subject: Re: [PATCH] serial: st-asc: Use new GPIOD API to obtain RTS pin

On Wed, 2017-02-08 at 18:47 +0100, Greg KH wrote:
> On Wed, Feb 08, 2017 at 06:31:10PM +0200, Andy Shevchenko wrote:
> > On Wed, 2017-02-08 at 21:48 +0800, kbuild test robot wrote:
> > > Hi Lee,
> > > 
> > > [auto build test ERROR on tty/tty-testing]
> > > [cannot apply to v4.10-rc7 next-20170208]
> > > [if your patch is applied to the wrong git tree, please drop us a
> > > note
> > > to help improve the system]
> > > 
> > > url:    https://github.com/0day-ci/linux/commits/Lee-Jones/serial-
> > > st-a
> > > sc-Use-new-GPIOD-API-to-obtain-RTS-pin/20170208-180609
> > > base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
> > > .git
> > >  tty-testing
> > > config: x86_64-allmodconfig (attached as .config)
> > > compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
> > > reproduce:
> > >         # save the attached .config to linux build tree
> > >         make ARCH=x86_64 
> > > 
> > 
> > It requires to have immutable branch in one of the subsystem which
> > the
> > other one can pull.
> 
> Which sucks, and is why you should not do api changes this way!

Not only me :-)

If above will not work we may do something like below for this cycle:

static inline ... devm_get_gpiod_from_child()
{
 return devm_fwnode_get_gpiod_from_child(..., GPIO_AS_IS, "?");
}

in GPIO tree.

-- 
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Intel Finland Oy