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Re: [PATCH v2 2/2] of: changesets: Introduce changeset helper methods

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Hi Geert,

> On Sep 21, 2015, at 15:47 , Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> 
> Hi Pantelis,
> 
> On Mon, Sep 21, 2015 at 2:36 PM, Pantelis Antoniou
> <pantelis.antoniou@konsulko.com> wrote:
>>> On Sep 21, 2015, at 15:35 , Geert Uytterhoeven <geert@linux-m68k.org> wrote:
>>> On Wed, Sep 16, 2015 at 6:11 PM, Pantelis Antoniou
>>> <pantelis.antoniou@konsulko.com> wrote:
>>>> Changesets are very powerful, but the lack of a helper API
>>>> makes using them cumbersome. Introduce a simple copy based
>>>> API that makes things considerably easier.
>>>> 
>>>> To wit, adding a property using the raw API.
>>>> 
>>>>       struct property *prop;
>>>>       prop = kzalloc(sizeof(*prop)), GFP_KERNEL);
>>>>       prop->name = kstrdup("compatible");
>>>>       prop->value = kstrdup("foo,bar");
>>>>       prop->length = strlen(prop->value) + 1;
>>>>       of_changeset_add_property(ocs, np, prop);
>>>> 
>>>> while using the helper API
>>>> 
>>>>       of_changeset_add_property_string(ocs, np, "compatible",
>>>>                       "foo,bar");
>>> 
>>> What about removing properties?
>> 
>> Once upon a time there was that capability. It was removed after we didn’t have
>> a good use for them yet. Do you have any? I’d be happy to re-add it :)
> 
> Aliases?
> 
> If an overlay removes e.g. a serial port, it should remove its alias, too.
> 

Well, that case is handled. Addition of a property results in removal of a property when
the overlay is reverted.

This is an accessor API that makes things simpler than what’s internally used at
overlays.

We’re talking about removal of a property/node as part of application.

> Gr{oetje,eeting}s,
> 
>                        Geert
> 

Regards

— Pantelis

> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
> 
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                -- Linus Torvalds

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[PATCH v2 0/2] of: Dynamic DT updates Pantelis Antoniou <pantelis.antoniou@konsulko.com> - 2015-09-16 18:20 +0200
  [PATCH v2 2/2] of: changesets: Introduce changeset helper methods Pantelis Antoniou <pantelis.antoniou@konsulko.com> - 2015-09-16 18:20 +0200
    Re: [PATCH v2 2/2] of: changesets: Introduce changeset helper methods Rob Herring <robh@kernel.org> - 2015-09-17 16:20 +0200
      Re: [PATCH v2 2/2] of: changesets: Introduce changeset helper methods Pantelis Antoniou <pantelis.antoniou@konsulko.com> - 2015-09-18 11:20 +0200
        Re: [PATCH v2 2/2] of: changesets: Introduce changeset helper methods Rob Herring <robh@kernel.org> - 2015-09-18 16:30 +0200
    Re: [PATCH v2 2/2] of: changesets: Introduce changeset helper methods Pantelis Antoniou <pantelis.antoniou@konsulko.com> - 2015-09-21 14:40 +0200
      Re: [PATCH v2 2/2] of: changesets: Introduce changeset helper methods Pantelis Antoniou <pantelis.antoniou@konsulko.com> - 2015-09-21 14:50 +0200
        Re: [PATCH v2 2/2] of: changesets: Introduce changeset helper methods Geert Uytterhoeven <geert@linux-m68k.org> - 2015-09-21 15:10 +0200
          Re: [PATCH v2 2/2] of: changesets: Introduce changeset helper methods Pantelis Antoniou <pantelis.antoniou@konsulko.com> - 2015-09-21 15:20 +0200
      Re: [PATCH v2 2/2] of: changesets: Introduce changeset helper methods Geert Uytterhoeven <geert@linux-m68k.org> - 2015-09-21 14:50 +0200
    Re: [PATCH v2 2/2] of: changesets: Introduce changeset helper methods Geert Uytterhoeven <geert@linux-m68k.org> - 2015-09-21 14:40 +0200
  [PATCH v2 1/2] of: dynamic: Add __of_node_dupv() Pantelis Antoniou <pantelis.antoniou@konsulko.com> - 2015-09-16 18:20 +0200
  Re: [PATCH v2 0/2] of: Dynamic DT updates Rob Herring <robherring2@gmail.com> - 2015-09-16 18:50 +0200
    Re: [PATCH v2 0/2] of: Dynamic DT updates Pantelis Antoniou <pantelis.antoniou@konsulko.com> - 2015-09-16 21:10 +0200

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