linux-kernel - Re: [PATCH V2] ARM: Xilinx: Adding Xilinx board support

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Date:	Tue, 14 Jun 2011 23:37:29 -0600
From:	Grant Likely <grant.likely@...retlab.ca>
To:	Barry Song <21cnbao@...il.com>
Cc:	johnlinn@...cast.net, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, linux@....linux.org.uk,
	arnd@...db.de, nicolas.pitre@...aro.org,
	John Linn <john.linn@...inx.com>
Subject: Re: [PATCH V2] ARM: Xilinx: Adding Xilinx board support

On Tue, Jun 14, 2011 at 9:23 PM, Barry Song <21cnbao@...il.com> wrote:
> 2011/5/18  <johnlinn@...cast.net>:
>> +static struct of_device_id zynq_of_bus_ids[] __initdata = {
>> +       { .compatible = "simple-bus", },
>> +       {}
>> +};
>> +
>> +/**
>> + * xilinx_init_machine() - System specific initialization, intended to be
>> + *                        called from board specific initialization.
>> + */
>> +void __init xilinx_init_machine(void)
>> +{
>> +#ifdef CONFIG_CACHE_L2X0
>> +       /*
>> +        * 64KB way size, 8-way associativity, parity disabled
>> +        */
>> +       l2x0_init(PL310_L2CC_BASE, 0x02060000, 0xF0F0FFFF);
>> +#endif
>> +
>> +       of_platform_bus_probe(NULL, zynq_of_bus_ids, NULL);
>> +}
>
> it looks to me a common machine init function is calling a
> chip/board-special device probing. xilinx_init_machine  is calling
> zynq_of_bus_ids. what will happen if we add a new different with zynq?

The bus_ids are actually pretty generic.  I've got a patch in my tree
which I'll be posting soon that creates a generic bus id table that
most platforms can use.

g.
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