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

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Message-ID: <CAMuHMdUDXZFun7+y3axnz6HKiNaeJnPkVG6Qhq6y4=mcCpPL2w@mail.gmail.com>
Date:	Mon, 21 Sep 2015 14:47:15 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Pantelis Antoniou <pantelis.antoniou@...sulko.com>
Cc:	Rob Herring <robherring2@...il.com>,
	Frank Rowand <frowand.list@...il.com>,
	Matt Porter <mporter@...sulko.com>,
	Koen Kooi <koen@...inion.thruhere.net>,
	Guenter Roeck <linux@...ck-us.net>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 2/2] of: changesets: Introduce changeset helper methods

Hi Pantelis,

On Mon, Sep 21, 2015 at 2:36 PM, Pantelis Antoniou
<pantelis.antoniou@...sulko.com> wrote:
>> On Sep 21, 2015, at 15:35 , Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
>> On Wed, Sep 16, 2015 at 6:11 PM, Pantelis Antoniou
>> <pantelis.antoniou@...sulko.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.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-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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