[PATCH v5 0/6] mmc: sdhci-of-aspeed: Expose phase delay tuning

Andrew Jeffery andrew at aj.id.au
Tue Dec 8 12:26:09 AEDT 2020


This series implements support for the MMC core clk-phase-* devicetree bindings
in the Aspeed SD/eMMC driver. The relevant register was exposed on the AST2600
and is present for both the SD/MMC controller and the dedicated eMMC

v5 fixes some build issues identified by the kernel test robot.

v4 can be found here:


The series has had light testing on an AST2600-based platform which requires
180deg of input and output clock phase correction at HS200, as well as some
synthetic testing under qemu and KUnit.

Please review!



Andrew Jeffery (6):
  mmc: core: Add helper for parsing clock phase properties
  mmc: sdhci-of-aspeed: Expose clock phase controls
  mmc: sdhci-of-aspeed: Add AST2600 bus clock support
  mmc: sdhci-of-aspeed: Add KUnit tests for phase calculations
  MAINTAINERS: Add entry for the ASPEED SD/MMC driver
  ARM: dts: rainier: Add eMMC clock phase compensation

 MAINTAINERS                                  |   9 +
 arch/arm/boot/dts/aspeed-bmc-ibm-rainier.dts |   1 +
 drivers/mmc/core/host.c                      |  44 ++++
 drivers/mmc/host/Kconfig                     |  14 ++
 drivers/mmc/host/Makefile                    |   1 +
 drivers/mmc/host/sdhci-of-aspeed-test.c      | 100 ++++++++
 drivers/mmc/host/sdhci-of-aspeed.c           | 251 ++++++++++++++++++-
 include/linux/mmc/host.h                     |  17 ++
 8 files changed, 426 insertions(+), 11 deletions(-)
 create mode 100644 drivers/mmc/host/sdhci-of-aspeed-test.c


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