[PATCH v2 0/4] amlogic: t7: give the MMC bus pipeline clock real consumers

[Lucas Tanure <tanure@linux.com>]

The previous series for the intermittent boot hangs on the VIM4
marked sys_ampipe_nand as critical. But as Chuan Liu from Amlogic
explained, sys_ampipe_nand clocks a pipeline stage that the
hardware design inserts in the bus path between the SD/eMMC
controllers and the NIC_MATRIX fabric to help timing closure.

So the clock has real consumers: reference it from the three MMC
controller nodes and drop CLK_IS_CRITICAL instead.

The series crosses three trees; patch 4 (clk) must only land after
patches 1-3, otherwise the DMA hangs fixed by 43e1705ecab9 come back.

Changes since v1 [3]:
 - Dropped the Fixes: tag; this series is an improvement and should not
   be picked up by stable (Jerome Brunet)
 - Moved the patch 4 dependency note below the --- so it is not kept
   for posterity (Jerome Brunet)
 - Dropped the e-mail address from the Assisted-by trailer, see
   Documentation/process/coding-assistants.rst (Jerome Brunet)
 - Fixed the space-indented error path added to meson_mmc_probe() in
   patch 2, it did not pass checkpatch
 - Dropped the CLK_PIPELINE() macro from patch 2; has_pipeline_clk is a
   capability flag, not an SD_EMMC_CLOCK register field

Thanks,
Lucas

Lucas Tanure (4):
  dt-bindings: mmc: amlogic,meson-gx-mmc: document the T7 pipeline clock
  mmc: meson-gx: enable the bus pipeline clock on T7
  arm64: dts: amlogic: t7: add the pipeline clock to the MMC controllers
  clk: meson: t7: don't mark sys_ampipe_nand as critical

 .../bindings/mmc/amlogic,meson-gx-mmc.yaml    | 29 ++++++++++++++++++-
 arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi   | 15 ++++++----
 drivers/clk/meson/t7-peripherals.c            | 10 +++----
 drivers/mmc/host/meson-gx-mmc.c               | 20 +++++++++++++
 4 files changed, 62 insertions(+), 12 deletions(-)

-- 
2.55.0


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