[PATCH 0/3] rockchip: sdhci: Add HS400 Enhanced Strobe support

[Alper Nebi Yasak]

I'm trying to make my gru-kevin's eMMC work properly (it times out while
tuning for HS400 and stops working when reinitialized via "mmc dev 0").
While experimenting with what works on my board I ended up implementing
HS400ES support. And while I'm at it, I decided to do it for RK3568 as
well since it turned out easy enough. Both are ported from relevant
Linux drivers.

I'm trying this with "load mmc 0:1 0xd0000000 /bigfile $size" and getting
the following speeds; and with "mmc info" the following differences:

    gru-kevin mmc0      | w/o this series           | w/ this series
    --------------------+---------------------------+-------------------
    Bus Speed           | 52000000                  | 200000000
    Mode                | MMC High Speed (52MHz)    | HS400ES (200 MHz)
    8MiB Load Speed     | ~9.5 MiB/s                | ~51.5 MiB/s
    256MiB Load Speed   | ~177.8 MiB/s              | ~114.5 MiB/s

Listing partitions, listing files, reading files and the loaded bytes
all look fine to me, but I'm not sure I haven't missed anything.


Alper Nebi Yasak (3):
  mmc: sdhci: Add HS400 Enhanced Strobe support
  rockchip: sdhci: Add HS400 Enhanced Strobe support for RK3399
  rockchip: sdhci: Add HS400 Enhanced Strobe support for RK3568

 drivers/mmc/rockchip_sdhci.c | 51 ++++++++++++++++++++++++++++++++++++
 drivers/mmc/sdhci.c          | 18 +++++++++++++
 include/sdhci.h              |  1 +
 3 files changed, 70 insertions(+)

-- 
2.33.1