Thread (9 messages) 9 messages, 4 authors, 2011-08-29

How to handle named resources with DT?

From: David Gibson <hidden>
Date: 2011-08-27 14:37:36
Also in: linux-devicetree, linux-omap

Possibly related (same subject, not in this thread)

On Fri, Aug 26, 2011 at 05:41:29PM +0200, Arnd Bergmann wrote:
On Friday 26 August 2011, Arnd Bergmann wrote:
quoted
On Friday 26 August 2011, David Gibson wrote:
quoted
If you open code it this way then yes, it's silly.  But what about
something like this:

static struct of_device_id foodevice_of_match[] __devinitdata = {
        { .compatible = "foocorp,foodevice1234",
          .resource_names = {"base_regs", "extra_regs", }, },
        { .compatible = "foocorp,foodevice1239",
          .resource_names = {"base_regs", "extra_regs", "more_regs", }, }, 
        { },
};
Hmm, I hadn't thought of that. This looks quite nice indeed. No objections
to this from my side.
Ah well, one objection on second thought:

This assumes that there is just one type of resource, but named resources
may be used for iomem, ioport and irq resources. If you have multiple
IRQs and multiple IOMEM resources, I don't see how the index in the 
resource_names array can be used for both of them.
Details, shmetails, so you have both 'reg_names' and 'interrupt_names'.

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson
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