This series of patches are based on spi for-next, and provide 3 patches to support MT7986.

V5:
 1. remove 3 patches that already applied.
 2. use devm_clk_get_optional.
 3. remove of_mtk_spi_parse_dt()

v4:
 1. fix Rob comment in v3;
 2. use "mediatek,mt7986-spi-ipm","mediatek,spi-ipm"

v3:
 1. add Rob Acked-by in "dt-bindings: spi: Add compatible for MT7986 with single mode";
 2. add a fix patch "spi: mediatek: support tick_delay without enhance_timing";
 3. fix Angelogioacchino comments;
 4. use mt7986 instead of ipm in dt-binding.

v2:
 1. rebase this series on spi for-next.
 2. fix Rob and Krzysztof comments in v1.

Leilk Liu (3):
  spi: mediatek: add spi memory support for ipm design
  dt-bindings: spi: support hclk
  spi: mediatek: support hclk

 .../bindings/spi/mediatek,spi-mt65xx.yaml     |   4 +
 drivers/spi/spi-mt65xx.c                      | 387 +++++++++++++++++-
 2 files changed, 374 insertions(+), 17 deletions(-)

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2.25.1