linux-kernel - Re: [PATCH v7 2/3] pwm_backlight: use power sequences

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Date:	Fri, 19 Oct 2012 18:31:53 +0900
From:	Alex Courbot <acourbot@...dia.com>
To:	Tony Prisk <linux@...sktech.co.nz>
CC:	Stephen Warren <swarren@...dia.com>,
	Thierry Reding <thierry.reding@...onic-design.de>,
	Simon Glass <sjg@...omium.org>,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Anton Vorontsov <cbou@...l.ru>,
	David Woodhouse <dwmw2@...radead.org>,
	Arnd Bergmann <arnd@...db.de>,
	"linux-fbdev@...r.kernel.org" <linux-fbdev@...r.kernel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	Leela Krishna Amudala <l.krishna@...sung.com>,
	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>
Subject: Re: [PATCH v7 2/3] pwm_backlight: use power sequences

On Friday 19 October 2012 17:20:36 Tony Prisk wrote:
> On Fri, 2012-10-19 at 18:06 +0900, Alexandre Courbot wrote:
> > +static void pwm_backlight_on(struct backlight_device *bl)
> > +{
> > +     struct pwm_bl_data *pb = dev_get_drvdata(&bl->dev);
> > +     int ret;
> > +
> > +     if (pb->enabled)
> > +             return;
> > +
> > +     if (pb->power_on_seq) {
> > +             ret = power_seq_run(pb->power_on_seq);
> > +             if (ret < 0) {
> > +                     dev_err(&bl->dev, "cannot run power on
> > sequence\n");
> > +                     return;
> > +             }
> > +     } else {
> > +             /* legacy framework */
> > +             pwm_config(pb->pwm, 0, pb->period);
> > +             pwm_disable(pb->pwm);
> 
> Is this right? pwm_disable() in the backlight_on function?

Now everybody will notice that I never really tested the legacy interface. >_<

Thanks, this was totally wrong indeed.

Alex.

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