Regarding irq_of_parse_and_map

[Vijay Nikam]

I checked and read the
Documentation/powerpc/dts-bindings/fsl/8xxx_gpio.txt and
booting-without-of.txt. It is different then what I read before from
booting-without-of.txt ... perhaps as it is old and came with BSP. Am
I right ? ? ?

> Don't specify this explicitly.  Please base new development off of the
> device tree that is in upstream Linux, not the very old tree in your BSP.

May I know the reason why I should not specify it explicitly ? ? ?
Also what would be the problem if I do in the same way as it is given
in BSP mpc8313erdb.dts ? ? ?

And should I use gpio-controller as a gpio device node ? ? ?

Kindly please acknowledge ... thank you ...

Kind Regards,
Vijay Nikam

On 2/17/09, Scott Wood <scottwood at freescale.com> wrote:
> Vijay Nikam wrote:
> > I added the gpio node as follows to mpc8313erdb.dts;
> >
> > gpio at c00 {
> >        linux,phandle = <c00>;
> >
>
> Don't specify this explicitly.  Please base new development off of the
> device tree that is in upstream Linux, not the very old tree in your BSP.
>
> >        device_type = "gpio";
> >
>
> No device_type.
>
> > The only thing I need to know what should I write at 'compatible' tag
> > ? ? ? the compatible tag format is "manufacturer,model" the
> > manufacturer is 'fsl' i.e. I think freescale but the model, as it is
> > the model number where I can find this model ? ? ? Please let me know
> > ... thanks ...
> >
>
> compatible = "fsl,mpc8313-gpio", "fsl,mpc8349-gpio";
>
> > Also I would like to ask if the above device node is written according
> > to bindings ... I think it should be right as I referred
> > 'bootingwithout-of.txt' ... but please correct me if I am worng ? ? ?
> >
>
> See also
> Documentation/powerpc/dts-bindings/fsl/8xxx_gpio.txt.
>
> Also note that current Linux has a driver in
> arch/powerpc/sysdev/mpc8xxx_gpio.c.
>
> -Scott
>