[PATCH 0/4] mmc: sdhci-cadence6: harden PHY config tables and enable Agilex5 UHS modes

[tze.yee.ng@altera.com]

From: Tze Yee Ng <tze.yee.ng@altera.com>

This series hardens the per-mode PHY/controller configuration handling in
the Cadence SD6HC (v6) driver and then enables the UHS-I higher-speed
modes (SDR104 and DDR50, plus eMMC DDR52) on the Agilex5 SoCDK and its
013B and modular variants:

  - const config tables + per-call copies, so device-tree overrides can
    no longer mutate the shared defaults and leak between controllers;
  - named enum slots for the PHY/HRS config tables, so reordering or 
    inserting an entry cannot silently reprogram the wrong register
    (no functional change);
  - program the PHY control register (0x2080) per speed mode, with a
    per-mode / per-board device-tree override;
  - add the SDR104 (emmc-hs200) and DDR50 (emmc-ddr) PHY timing for the
    Agilex5 SoCDK, 013B and modular boards and advertise the matching
    sd-uhs-* / mmc-ddr-1_8v capabilities.

Dependencies
------------ 
The driver patches (1-3) apply on top of, and depend on, the fixes 
series (series=519635): 
  "mmc: sdhci-cadence6: fix PHY programming reliability" 

The HRS05 posted-write flush and the post-adjustment settle delay from
that series are required for reliable higher-speed operation.

The device-tree patch (4) additionally depends on two Agilex5 board
patches still under review, as it extends the .dts/.dtsi files they add:

  "arm: dts: socfpga: Add MDK support with external GPIO expander"
      - Tanmay Kathpalia (series=16401)
  "arm: dts: socfpga: Add Agilex5 E-Series 013B SoCDK variant"
      - Dinesh Maniyam (series=32177)

Tze Yee Ng (4):
  mmc: sdhci-cadence6: use const PHY config tables with per-call
    overrides
  mmc: sdhci-cadence6: name PHY and controller config table slots
  mmc: sdhci-cadence6: configure PHY control register per speed mode
  arm: dts: socfpga: agilex5: add SD/eMMC UHS PHY timing

 .../arm/dts/socfpga_agilex5_socdk-u-boot.dtsi |  13 ++
 .../socfpga_agilex5_socdk_013b-u-boot.dtsi    |  24 +++-
 arch/arm/dts/socfpga_agilex5_socdk_013b.dts   |   4 +-
 arch/arm/dts/socfpga_agilex5_socdk_emmc.dts   |  13 ++
 .../arm/dts/socfpga_agilex5_socdk_modular.dts |  20 +++
 drivers/mmc/sdhci-cadence6.c                  | 136 ++++++++++++------
 6 files changed, 166 insertions(+), 44 deletions(-)

-- 
2.43.7