[PATCH v2] arm: omap3evm: Add support for an MT9M032 based camera board.

[martin at neutronstar.dyndns.org]

On Sun, Sep 18, 2011 at 12:08:20AM +0200, Laurent Pinchart wrote:
> On Sunday 18 September 2011 00:00:16 Sylwester Nawrocki wrote:
> > On 09/17/2011 11:34 AM, Martin Hostettler wrote:
> > > Adds board support for an MT9M032 based camera to omap3evm.
> > 
> > ...
> > 
> > > +
> > > +static int __init camera_init(void)
> > > +{
> > > +	int ret = -EINVAL;
> > > +
> > > +	omap_mux_init_gpio(nCAM_VD_SEL, OMAP_PIN_OUTPUT);
> > > +	if (gpio_request(nCAM_VD_SEL, "nCAM_VD_SEL")<  0) {
> > > +		pr_err("omap3evm-camera: Failed to get GPIO nCAM_VD_SEL(%d)\n",
> > > +		       nCAM_VD_SEL);
> > > +		goto err;
> > > +	}
> > > +	if (gpio_direction_output(nCAM_VD_SEL, 1)<  0) {
> > > +		pr_err("omap3evm-camera: Failed to set GPIO nCAM_VD_SEL(%d)
> > > direction\n", +		       nCAM_VD_SEL);
> > > +		goto err_vdsel;
> > > +	}
> > 
> > How about replacing gpio_request + gpio_direction_output with:
> > 
> > 	gpio_request_one(nCAM_VD_SEL, GPIOF_OUT_INIT_HIGH, "nCAM_VD_SEL");
> 
> I'd even propose gpio_request_array().
> 

Nice interface. Apart from a bit less detailed error reporting it nicely
simplifies the code. I'll make a new patch using that soon.

 - Martin Hostettler