[v2,0/8] Add RZ/G3E SDHI support

Message

Biju Das Jan. 31, 2025, 11:24 a.m. UTC

The SD/MMC block on the RZ/G3E ("R9A09G047") SoC is similar to that
of the RZ/V2H, but the SD0 channel has only dedicated pins, so we must
use SD_STATUS register to control voltage and power enable (internal
regulator).

For SD1 and SD2 channel we can either use gpio regulator or internal
regulator (using SD_STATUS register) for voltage switching.

For SD0, fixed voltage(eMMC) uses fixed regulator and non-fixed voltage
(SD) uses internal regulator.

v1->v2:
 * Collected tags.
 * Documented internal regulator as optional property for both RZ/G3E and
   RZ/V2H SoCs.
 * Updated commit description for regulator used in SD0 fixed and
   non-fixed voltage case in patch#3.
 * As the node enabling of internal regulator is controlled through status,
   added a check for device availability.
 * Status of internal regulator is disabled in the SoC .dtsi. Override
   the status in the board DTS when needed.
 * Added support for enabling SDHI internal regulator in RZ/V2H
 * Added missing header file gpio.h
 * Used fixed regulator for eMMC on SD0 and dropped sd0-iovs pins for
   eMMC.
 * Sorted pinctrl nodes for sd2
 * Enabled internal regulator for SD2.
 * Added support for enabling SD on SDHI0
 * Replaced the regulator usd_vdd_3p3v->reg_3p3v.
 * Renamed the gpio-hog node sd1-pwr-en->sd1-pwr-en-hog.
 * Sorted sd1 pin ctrl nodes.

Biju Das (8):
  dt-bindings: mmc: renesas,sdhi: Document RZ/G3E support
  mmc: renesas_sdhi: Arrange local variables in reverse xmas tree order
  mmc: renesas_sdhi: Add support for RZ/G3E SoC
  arm64: dts: renesas: r9a09g047: Add SDHI0-SDHI2 nodes
  arm64: dts: renesas: r9a09g057: Add support for enabling SDHI internal
    regulator
  arm64: dts: renesas: rzg3e-smarc-som: Enable SDHI{0,2}
  arm64: dts: renesas: rzg3e-smarc-som: Add support for enable SD on
    SDHI0
  arm64: dts: renesas: r9a09g047e57-smarc: Enable SDHI1

 .../devicetree/bindings/mmc/renesas,sdhi.yaml |  16 ++
 arch/arm64/boot/dts/renesas/r9a09g047.dtsi    |  60 +++++++
 .../boot/dts/renesas/r9a09g047e57-smarc.dts   |  49 ++++++
 arch/arm64/boot/dts/renesas/r9a09g057.dtsi    |  21 +++
 .../dts/renesas/r9a09g057h44-rzv2h-evk.dts    |   4 +-
 .../boot/dts/renesas/renesas-smarc2.dtsi      |  18 ++
 .../boot/dts/renesas/rzg3e-smarc-som.dtsi     | 158 ++++++++++++++++++
 drivers/mmc/host/renesas_sdhi.h               |   1 +
 drivers/mmc/host/renesas_sdhi_core.c          | 136 ++++++++++++++-
 drivers/mmc/host/tmio_mmc.h                   |   5 +
 10 files changed, 465 insertions(+), 3 deletions(-)