[U-Boot] [PATCH v2] sunxi: mmc: Fix clk-delay settings
Ian Campbell
ijc+uboot at hellion.org.uk
Thu Sep 24 17:13:12 CEST 2015
On Thu, 2015-09-24 at 16:31 +0200, Hans de Goede wrote:
> In recent allwinner kernel sources the mmc/sdio clk-delay settings have
> been slightly tweaked, and for sun9i they are completely different then
> what we are using.
>
> This commit brings us in sync with what allwinner does, fixing problems
> accessing sdcards on some A33 devices (and likely others).
>
> For pre sun9i hardware this makes the following changes:
> -At 400Khz change the sample delay from 7 to 0 (first introduced in A31
> sdk)
> -At 50 Mhz change the sample delay from 5 to 4 (first introduced in A23
> sdk)
> -Above 50 MHz change the out delay from 2 to 1 (first introduced in A20
> sdk)
>
> Signed-off-by: Hans de Goede <hdegoede at redhat.com>
Acked-by: Ian Campbell <ijc at hellion.org.uk>
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