"ARM: MX3: fix CPU revision number detection" breaks QONG support

[Wolfgang Denk]

Dear Daniel Mack,

In message <20091211234714.GT28375 at buzzloop.caiaq.de> you wrote:
> 
> Yes, Vaentin Lonchamp (cc) also reported that problem. The problem seems
> to be related to things the bootloader does to your board, and I'm not
> sure yet where the difference is between the MX31 LiteKit and others. My
> suspect was that the clocks are not set up properly, but they have been
> reported to be ok. What fails is a single register access. Maybe access
> to this function block needs to be enabled or unlocked or something?

I don't think this is a boot loader issue.

In Linux, the kernel hangs here:

	/* read SREV register from IIM module */
	srev = __raw_readl(IO_ADDRESS(IIM_BASE_ADDR) + MXC_IIMSREV);

In U-Boot, I can read this register just fine:

	=> md 5001c024 1
	5001c024: 00000028    (...

In Linux, the IO_ADDRESS() makes this a read from 0xFC11C024, which
hangs.

So if this is a clock thing, then it must be a clock being disabled by
Linux.

Best regards,

Wolfgang Denk

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