[PATCH RESEND] mfd: anatop: permit adata be NULL when access register

[Samuel Ortiz]

Hi Richard,

On Mon, Jun 04, 2012 at 09:56:29AM +0800, Richard Zhao wrote:
> From: Richard Zhao <richard.zhao at linaro.org>
> 
> It makes anatop register access easier. Anatop has many misc registers,
> which may not be a specific driver.
> 
> There's only one anatop device for a running system, so we use a global
> variable to store struct anatop.
Even though I understand it's quite unlikely that you'll never get 2 anatop
blocks on the same system, the below patch is not really nice.
Please make your driver support N > 1 instances of your hardware, even though
it's only for the sake of code cleanness.

Cheers,
Samuel.

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