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Subject[PATCH v4 0/9] Add sd/emmc support for stih407 family silicon
This series adds sd/emmc support to the sdhci-st.c driver for stih407
family silicon. The changes mainly involve configuring some extra glue
registers in the flashSS which configure the Arasan controller.

This series also adds support for UHS modes for eMMC. To allow
UHS HS200/SD104 modes to function correctly, due to the
tight timing constriants, support for delay management is also added.
Two types of delay management are supported, static delay management and
dynamic delay management, this delay management is only available
on eMMC pads on stih410 and later silicon.

This series has been tested with stih410-b2120 revd on eMMC and sd, at
various clock speeds. As part of this testing a bug was also found in the
upstream flexgen clock set_rate implementation (now fixed upstream).

max-frequency = 200Mhz
Timing buffered disk reads: 270 MB in 3.02 seconds = 89.54 MB/sec

max-frequency = 100Mhz
root@debian-armhf:~# hdparm -t /dev/mmcblk0p1
Timing buffered disk reads: 210 MB in 3.00 seconds = 70.00 MB/sec

max-frequency = 50Mhz
root@debian-armhf:~# hdparm -t /dev/mmcblk0p1
Timing buffered disk reads: 118 MB in 3.00 seconds = 39.28 MB/sec

It has also been tested on stih416-b2020 to ensure we have caused no
regressions. Finally the dt documentation has been updated to reflect
the changes in the driver code. Intrestingly it seems we are the first
upstream platform to be using some of the uhs bindings such as

Changes since v3:
- Rebased on Ulf's mmc next branch (rc5 based) (Ulf)

Changes since v2:
- Some whitespace fixups (Max)
- if (!ioaddr) suggestion (Max)
- Add stih418-b2199 suport (Max)
- Stih410 to STiH410 fixes (Max)
- rebased on v4.0-rc6 (Pete)

Changes since v1:
- Partition the changes into smaller patches to aid review process (Ulf)

Peter Griffin (9):
mmc: sdhci-st: Add macros for register offsets and bitfields for mmcss
glue regs
mmc: sdhci-st: Add support for de-asserting reset signal and top regs
mmc: sdhci-st: Add delay management functions for top registers
mmc: sdhci-st: Add st_mmcss_cconfig function to configure mmcss glue
mmc: sdhci-st: Add sdhci_st_set_uhs_signaling function.
mmc: sdhci-st: Update the quirks for this controller.
mmc: sdhci-st: Update ST SDHCI binding documentation.
ARM: STi: DT: STiH407: Add dt nodes for sdhci and emmc.
ARM: STi: DT: STiH418: Add dt nodes for sdhci and emmc.

Documentation/devicetree/bindings/mmc/sdhci-st.txt | 100 +++++-
arch/arm/boot/dts/stih407-family.dtsi | 30 ++
arch/arm/boot/dts/stih410-b2120.dts | 10 +
arch/arm/boot/dts/stih418-b2199.dts | 12 +
arch/arm/boot/dts/stihxxx-b2120.dtsi | 8 +
drivers/mmc/host/sdhci-st.c | 353 ++++++++++++++++++++-
6 files changed, 499 insertions(+), 14 deletions(-)


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