Re: [PATCH v4 2/3] ARM: mvebu: Add quirk for i2c

[Wolfram Sang <wsa@the-dreams.de>]

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On Tue, Jan 07, 2014 at 11:38:53AM -0700, Jason Gunthorpe wrote:
> On Tue, Jan 07, 2014 at 05:35:03PM +0100, Gregory CLEMENT wrote:
> > +static struct property i2c_offload_broken = {
> > +	.name = "offload-broken",
> > +};
> > +
> > +static void __init i2c_quirk(void)
> > +{
> > +	struct device_node *np;
> > +	u32 dev, rev;
> > +
> > +	/*
> > +	 * Only revisons more recent than A0 support the offload
> > +	 * mechanism. We can exit only if we are sure that we can
> > +	 * get the SoC revision and it is more recent than A0.
> > +	 */
> > +	if (mvebu_get_soc_id(&rev, &dev) == 0 && dev > MV78XX0_A0_REV)
> > +		return;
> > +
> > +	for_each_compatible_node(np, NULL, "marvell,mv78230-i2c")
> > +		of_add_property(np, &i2c_offload_broken);
> 
> I like this approach.

Sorry, but I don't.

> However, when I first read this I thought it should be a -a0 specific
> compatible string, not a 'offload-broken' property - any idea what the
> DT consensus is here? I've seen both approach in use ..

I prefer the replacement of the compatible string. If it should really
be a seperate property, then it should be a vendor specific property. It
is not generic, at all.


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