[PATCH v3 0/6] Support SD/SDIO controllers on RK3528

[Yao Zi]

RK3528 features two SDIO controllers and one SD/MMC controller. This
series adds essential support for their tuning clocks, document the
controller in dt-bindings and bring the SD/MMC one up on Radxa E20C
board. Both HS and SDR104 mode are verified.

- Changed from v2
  - Apply review tags
  - Rebase on top of linux-rockchip/for-next and drop applied patches
  - RK3528 devicetree
    - Fix accidentally dropped status property of saradc node
    - drop det and pwren pinctrls for SDIO{0,1} according to the
      reference design
    - Correct max-frequency for SDIO{0,1}
  - rk3528-radxa-e20c devicetree
    - Don't disable sdio for sdmmc as claimed in the hw design guide
  - Link to v2: https://lore.kernel.org/all/20250305194217.47052-1-ziyao@xxxxxxxxxxx/
- Changed from v1
  - Apply review tags
  - Rebase on top of linux-rockchip/for-next and saradc v2 series
  - rk3528 clock driver:
    - explicitly include minmax.h, replace MAX() with more robust max()
    - readability improvements
    - fix error checks: ERR_PTR(-ENODEV), instead of ERR_PTR(ENODEV), is
      returned when syscon_regmap_lookup_by_compatible() fails for missing
      such syscon
  - RK3528 devicetree
    - Add default pinctrl
    - Move the per-SoC property, rockchip,default-sample-phase, into the
      SoC devicetree
  - rk3528-radxa-e20c devicetree
    - Assign sdcard to mmc1
    - Add missing regulators
    - Apply no-sdio for the sdmmc controller
    - Sort nodes
  - Link to v1: https://lore.kernel.org/all/20250301104250.36295-1-ziyao@xxxxxxxxxxx/

Thanks for your time and review.

Yao Zi (6):
  dt-bindings: mmc: rockchip-dw-mshc: Add compatible string for RK3528
  dt-bindings: clock: Add GRF clock definition for RK3528
  clk: rockchip: Support MMC clocks in GRF region
  clk: rockchip: rk3528: Add SD/SDIO tuning clocks in GRF region
  arm64: dts: rockchip: Add SDMMC/SDIO controllers for RK3528
  arm64: dts: rockchip: Enable SD-card interface on Radxa E20C

 .../bindings/mmc/rockchip-dw-mshc.yaml        |  1 +
 .../boot/dts/rockchip/rk3528-radxa-e20c.dts   | 33 +++++++++
 arch/arm64/boot/dts/rockchip/rk3528.dtsi      | 69 +++++++++++++++++++
 drivers/clk/rockchip/clk-mmc-phase.c          | 24 +++++--
 drivers/clk/rockchip/clk-rk3528.c             | 61 ++++++++++++++--
 drivers/clk/rockchip/clk.c                    | 42 +++++++++++
 drivers/clk/rockchip/clk.h                    | 23 ++++++-
 .../dt-bindings/clock/rockchip,rk3528-cru.h   |  6 ++
 8 files changed, 248 insertions(+), 11 deletions(-)

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2.48.1