[PATCH 1/3] mmc: mvsdio: Support inverted CD and WP GPIO lines

[Andrew Lunn]

On Mon, Apr 22, 2013 at 04:03:15PM -0400, Chris Ball wrote:
> Hi Simon,
> 
> On Mon, Apr 22 2013, Simon Baatz wrote:
> > diff --git a/drivers/mmc/host/mvsdio.c b/drivers/mmc/host/mvsdio.c
> > index 145cdaf..d444efd 100644
> > --- a/drivers/mmc/host/mvsdio.c
> > +++ b/drivers/mmc/host/mvsdio.c
> > @@ -691,6 +691,7 @@ static int __init mvsd_probe(struct platform_device *pdev)
> >  	struct resource *r;
> >  	int ret, irq;
> >  	int gpio_card_detect, gpio_write_protect;
> > +	enum of_gpio_flags gpio_flags;
> >  	struct pinctrl *pinctrl;
> >  
> >  	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > @@ -731,8 +732,17 @@ static int __init mvsd_probe(struct platform_device *pdev)
> >  		}
> >  
> >  		host->base_clock = clk_get_rate(host->clk) / 2;
> > -		gpio_card_detect = of_get_named_gpio(np, "cd-gpios", 0);
> > -		gpio_write_protect = of_get_named_gpio(np, "wp-gpios", 0);
> > +		gpio_card_detect = of_get_named_gpio_flags(np, "cd-gpios", 0,
> > +						     &gpio_flags);
> > +		if (gpio_is_valid(gpio_card_detect) &&
> > +		    !(gpio_flags & OF_GPIO_ACTIVE_LOW))
> > +			mmc->caps2 |= MMC_CAP2_CD_ACTIVE_HIGH;
> > +
> > +		gpio_write_protect = of_get_named_gpio_flags(np, "wp-gpios", 0,
> > +						       &gpio_flags);
> > +		if (gpio_is_valid(gpio_write_protect) &&
> > +		    !(gpio_flags & OF_GPIO_ACTIVE_LOW))
> > +			mmc->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH;
> >  	} else {
> >  		const struct mvsdio_platform_data *mvsd_data;
> >  		mvsd_data = pdev->dev.platform_data;
> 
> The core function mmc_of_parse() (new in 3.9) will do all of this DT
> parsing for you, and will also take care of the driver's later calls
> to mmc_gpio_request_{cd,wp}().  Could you try using that function
> instead, please?

Hi Chris, Simon

I have a vague recollection that Thomas Petazzoni already did this
conversion. Take a look in linux-next, or maybe Jason can point you at
a branch.

  Andrew