[U-Boot] [PATCH 2/2] mmc: Split device init to decouple OCR-polling delay

[Andy Fleming]

On Sat, Oct 20, 2012 at 10:16 PM, Simon Glass <sjg at chromium.org> wrote:

> From: Che-Liang Chiou <clchiou at chromium.org>
>
> Most of time that MMC driver spends on initializing a device is polling
> OCR (operation conditions register).  To decouple this polling loop,
> device init is split into two parts: The first part fires the OCR query
> command, and the second part polls the result.  So the caller is now no
> longer bound to the OCR-polling delay; he may fire the query, go
> somewhere and then come back later for the result.
>
> To use this, call mmc_set_preinit() on any device which needs this.
>
> This can save significant amounts of time on boot (e.g. 200ms) by
> hiding the MMC init time behind other init.
>
> Signed-off-by: Che-Liang Chiou <clchiou at chromium.org>
> Signed-off-by: Simon Glass <sjg at chromium.org>
>
>

Could you rebase this on my latest tree? It failed to apply for reasons
which weren't immediately clear to me, and it's a non-trivial chunk that
failed.

Thanks,
Andy