On Fri, 7 May 2021 at 08:44, Avri Altman [off-list ref] wrote:

quoted

In the SD spec v4.x the SD function extension registers were introduced,
together with a new set of commands (CMD48/49 and CMD58/59) to read
and write
to them.

Moreover, in v4.x a new standard function for power management features
were
added, while in v6.x a new standard function for performance
enhancements
features were added.

This series implement the basics to add support for these new features (and
includes some additional preparations in patch 1->7), by adding support for
reading and parsing these new SD registers. In the final patch we add
support
for the SD poweroff notification feature, which also add a function to write
to
these registers.

Note that, there are no HW updates need for the host to support
reading/parsing
of the these new SD registers. This has been tested with a 64GB Sandisk
Extreme
PRO UHS-I A2 card.

Tests and reviews are of course greatly appreciated!

Echoing an internal discussion about this series:
"...
That is very good that there will be a support of the extension registers of SD spec .   It may allow existing and future features to be very easily supported by hosts (like existing power off control and future TCG/RPMB related spec which is currently under definition and is going to use those registers as well..).

Thanks for sharing. I am happy to help!

..."
Therefore for entire series: Acked-by: Avri Altman [off-list ref]

Thanks for reviewing!

Kind regards
Uffe