linux-kernel - Re: [PATCH 1/2] fb: backlight: HX8357: Make IM pins optionnal

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Date:	Fri, 12 Jul 2013 11:11:23 +0200
From:	Maxime Ripard <maxime.ripard@...e-electrons.com>
To:	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>
Cc:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	linux-fbdev@...r.kernel.org, jimwall@...om, brian@...stalfontz.com,
	linux-kernel@...r.kernel.org, Richard Purdie <rpurdie@...ys.net>,
	Florian Tobias Schandinat <FlorianSchandinat@....de>
Subject: Re: [PATCH 1/2] fb: backlight: HX8357: Make IM pins optionnal

On Tue, Jun 25, 2013 at 03:50:15PM +0200, Maxime Ripard wrote:
> > >  };
> > >  
> > >  static u8 hx8357_seq_power[] = {
> > > @@ -250,9 +251,11 @@ static int hx8357_lcd_init(struct lcd_device *lcdev)
> > >  	 * Set the interface selection pins to SPI mode, with three
> > >  	 * wires
> > >  	 */
> > > -	gpio_set_value_cansleep(lcd->im_pins[0], 1);
> > > -	gpio_set_value_cansleep(lcd->im_pins[1], 0);
> > > -	gpio_set_value_cansleep(lcd->im_pins[2], 1);
> > > +	if (lcd->use_im_pins) {
> > > +		gpio_set_value_cansleep(lcd->im_pins[0], 1);
> > > +		gpio_set_value_cansleep(lcd->im_pins[1], 0);
> > > +		gpio_set_value_cansleep(lcd->im_pins[2], 1);
> > > +	}
> > 
> > base on the dt probe you may have gpios betwee 0 to HX8357_NUM_IM_PINS
> > 
> > so this look wrong
> 
> How so?
> 
> HX8357_NUM_IM_PINS is defined to 3, the probe checks to see if we
> actually have HX8357_NUM_IM_PINS, otherwise returns an error, what is
> wrong in setting these pins here?

Ping?

I'd really like to get this merged, could you clarify what you want?

Thanks,
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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