Re: [PATCH v5 0/4] mmc: sdhci-of-aspeed: Support toggling SD bus signal

Joel Stanley
2021-05-25T07:55:59Z

On Mon, 24 May 2021 at 07:33, Steven Lee <steven_lee@aspeedtech.com> wrote:
>
> AST2600-A2 EVB has the reference design for enabling SD bus
> power and toggling SD bus signal voltage between 3.3v and 1.8v by
> GPIO regulators.
> This patch series adds sdhci node and gpio regulators in a new dts file
> for AST2600-A2 EVB.
> The description of the reference design of AST2600-A2 EVB is added
> in the new dts file.
>
> This patch also include a helper for updating AST2600 sdhci capability
> registers.

The device trees look good:

Reviewed-by: Joel Stanley <joel@jms.id.au>

I've applied patches 1-3 to the aspeed tree for v5.14. I made a little
fix to patch 3 as it needed to add the new device tree to the
makefile.

When I was testing on my A2 EVB I saw this:

[ 1.436219] sdhci-aspeed 1e750100.sdhci: Requested out of range
phase tap 192 for 9 degrees of phase compensation at 1562500Hz,
clamping to tap 15
[ 1.450913] sdhci-aspeed 1e750100.sdhci: Requested out of range
phase tap 963 for 45 degrees of phase compensation at 1562500Hz,
clamping to tap 15

Do you know what is happening there?

Cheers,

Joel