[PATCH v1 0/3] Add sdhci driver support for TH1520 SoC

[bigunclemax@gmail.com]

From: Maksim Kiselev <bigunclemax@gmail.com>

Hi friends,

This patchset is a continuation of RFC
https://lore.kernel.org/u-boot/20240330175948.80931-1-bigunclemax@gmail.com/

It extends the previous version by adding sd and emmc nodes to lpi4a DT.
And enables required options in th1520_lpi4a_defconfig.

Also I did some testing of emmc on the lpi4a board and got
following results:

EMMC - 8Gb 8GTF4R (KLM8G1GETF-B041)
Sequential read\write of 1Gb with ADMA2

MB\s            READ    WRITE
------------------------------
MMC legacy      23      22
MMC_HS          23      22
MMC_HS_52       46      38
MMC_DDR_52      86      47
MMC_HS_200      176     48
MMC_HS_400      324     48
MMC_HS_400_ES   324     48

The results obtained are quite close to the values indicated
in the Samsung's datasheet*:

330MB\s - seq READ
50MB\s - seq WRITE

* Test Condition : Bus width x8, HS400, 512KB data transfer,
w/o file system overhead, measured on Samsung’s internal board.

Best regards,
Maksim

Maksim Kiselev (3):
  mmc: snps_sdhci: Add sdhci driver support for TH1520 SoC
  riscv: dts: t-head: Add sdhci and emmc nodes
  configs: th1520_lpi4a: enable mmc controller support

 arch/riscv/dts/th1520-lichee-module-4a.dtsi |  18 +
 arch/riscv/dts/th1520.dtsi                  |  34 ++
 configs/th1520_lpi4a_defconfig              |  11 +-
 drivers/mmc/Kconfig                         |  12 +
 drivers/mmc/Makefile                        |   1 +
 drivers/mmc/snps_sdhci.c                    | 494 ++++++++++++++++++++
 6 files changed, 569 insertions(+), 1 deletion(-)
 create mode 100644 drivers/mmc/snps_sdhci.c

-- 
2.45.2