Re: [PATCH RESEND] backlight: pwm_bl: don't use GPIOF_* with gpiod_get_direction

From: Daniel Vetter <daniel@ffwll.ch>
To: Simon Horman <horms@verge.net.au>
Cc: Wolfram Sang <wsa+renesas@sang-engineering.com>,
	linux-pwm@vger.kernel.org,
	Daniel Thompson <daniel.thompson@linaro.org>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
	Jingoo Han <jingoohan1@gmail.com>,
	linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
	linux-renesas-soc@vger.kernel.org,
	Thierry Reding <thierry.reding@gmail.com>,
	linux-fbdev@vger.kernel.org, Lee Jones <lee.jones@linaro.org>
Subject: Re: [PATCH RESEND] backlight: pwm_bl: don't use GPIOF_* with gpiod_get_direction
Date: Fri, 13 Apr 2018 18:08:24 +0200	[thread overview]
Message-ID: <20180413160824.GD31310@phenom.ffwll.local> (raw)
In-Reply-To: <20180411073215.fzvh4ejj2kd7wam3@verge.net.au>

On Wed, Apr 11, 2018 at 09:32:16AM +0200, Simon Horman wrote:
> On Tue, Apr 10, 2018 at 02:32:40PM +0200, Wolfram Sang wrote:
> > The documentation was wrong, gpiod_get_direction() returns 0/1 instead
> > of the GPIOF_* flags. The docs were fixed with commit 94fc73094abe47
> > ("gpio: correct docs about return value of gpiod_get_direction"). Now,
> > fix this user (until a better, system-wide solution is in place).
> > 
> > Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
> > Acked-by: Daniel Thompson <daniel.thompson@linaro.org>
> 
> Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
> 
> > ---
> > 
> > Changes since V1:
> > 	* rebased to top-of-linus-tree
> > 	* added tag from Daniel, thanks!
> > 
> > Through which tree does this need to go?

I think Daniel Thompson has one ...
-Daniel

> > 
> >  drivers/video/backlight/pwm_bl.c | 6 +++---
> >  1 file changed, 3 insertions(+), 3 deletions(-)
> > 
> > diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
> > index 1c2289ddd555..0fa7d2bd0e48 100644
> > --- a/drivers/video/backlight/pwm_bl.c
> > +++ b/drivers/video/backlight/pwm_bl.c
> > @@ -301,14 +301,14 @@ static int pwm_backlight_probe(struct platform_device *pdev)
> >  
> >  	/*
> >  	 * If the GPIO is not known to be already configured as output, that
> > -	 * is, if gpiod_get_direction returns either GPIOF_DIR_IN or -EINVAL,
> > -	 * change the direction to output and set the GPIO as active.
> > +	 * is, if gpiod_get_direction returns either 1 or -EINVAL, change the
> > +	 * direction to output and set the GPIO as active.
> >  	 * Do not force the GPIO to active when it was already output as it
> >  	 * could cause backlight flickering or we would enable the backlight too
> >  	 * early. Leave the decision of the initial backlight state for later.
> >  	 */
> >  	if (pb->enable_gpio &&
> > -	    gpiod_get_direction(pb->enable_gpio) != GPIOF_DIR_OUT)
> > +	    gpiod_get_direction(pb->enable_gpio) != 0)
> >  		gpiod_direction_output(pb->enable_gpio, 1);
> >  
> >  	pb->power_supply = devm_regulator_get(&pdev->dev, "power");
> > -- 
> > 2.11.0
> > 
> _______________________________________________
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> dri-devel@lists.freedesktop.org
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch