While working on another improvement for the reset routine, I noted an
issue with an old Gen2 SDHI instance which did not have a SCC. It turned
out that we never distinguished between the SCC and non-SCC versions on
Gen2 when it came to resetting. So far, it went OK but my upcoming
change broke. So, this series fixes the underlying issue by only
resetting the SCC when one is available.
I made very fine-grained patches because this driver is so fragile.
Nonetheless, my tests on a Renesas Lager board (R-Car H2) and
Salvator-XS (R-Car M3-N) were successful. Debug output showed that
proper code paths were taken and checksumming large files worked as well
as reinserting cards. The patches are based on mmc/next and 5.11 will
do because there seems to be no issue with current kernels.
I'd be very happy about further review and testing!
Thanks and all the best,
Wolfram
Wolfram Sang (4):
mmc: renesas_sdhi: only reset SCC when its pointer is populated
mmc: renesas_sdhi: probe into TMIO after SCC parameters have been
setup
mmc: renesas_sdhi: populate SCC pointer at the proper place
mmc: renesas_sdhi: simplify reset routine a little
drivers/mmc/host/renesas_sdhi_core.c | 38 +++++++++++++---------------
1 file changed, 18 insertions(+), 20 deletions(-)
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2.28.0
