[RFC PATCH] ARM: dts: meson8b-odroidc1: add microSD support

Linus Lüssing linus.luessing at c0d3.blue
Sat Mar 17 10:11:25 PDT 2018

Hi Martin,

Sorry for the late reply.

On Mon, Mar 12, 2018 at 10:00:17PM +0100, Martin Blumenstingl wrote:
> >> Not sure whether this error message could potentially point to some
> >> error in the changes in here.
> > these errors may be a problem with the meson-mx-sdio (MMC) driver
> > can you please show the output of /sys/kernel/debug/mmc0/ios ?
> some users on IRC have successfully tested this patch (together with
> the two patches from my series which fix the GPIO handling)
> can you please re-send this patch so Kevin can queue it for the next
> development cycle?

Glad to hear! I also just retried it with a 4.16-rc5 kernel and
your latest fixes and microSD still works for me, too :-).

Regarding the error message, I can't reproduce it anymore. With
the 4.16-rc5 kernel I did not see it. Nevertheless, here's the
output of mmc/ios:

$ cat /sys/kernel/debug/mmc0/ios
clock:		50000000 Hz
actual clock:	39843750 Hz
vdd:		21 (3.3 ~ 3.4 V)
bus mode:	2 (push-pull)
chip select:	0 (don't care)
power mode:	2 (on)
bus width:	2 (4 bits)
timing spec:	2 (sd high-speed)
signal voltage:	0 (3.30 V)
driver type:	0 (driver type B)

Out of curiousity, is the "actual clock" supposed to be so
much lower than "clock"?

Anyway, will resend the patch without the "RFC" now.

Regards, Linus

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