[PATCH v3 0/2] add the DDR clock controller on Meson8 and Meson8b

[Martin Blumenstingl]

Meson8 and Meson8b SoCs embed a DDR clock controller in their MMCBUS
registers. This series:
- adds support for this DDR clock controller (patches 0 and 1)
- wires up the DDR PLL as input for two audio clocks (patches 2 and 3)
- adds the DDR clock controller to meson8.dtsi and meson8b.dtsi

Special thanks go out to Alexandre Mergnat for switching the Amlogic
clock drivers over to parent_hws and parent_data. That made this series
a lot easier for me!

This series depends on v3 my other series from [0]:
"provide the XTAL clock via OF on Meson8/8b/8m2"


Changes since v2 at [2]:
- add #include <linux/clk-provider.h> as suggested by Stephen Boyd
- drop unused includes
- use devm_platform_ioremap_resource instead of open-coding it as
  suggested by Stephen Boyd
- drop trailing comma after sentinel element as suggested by Stephen
  Boyd
- dropped patch #3 "clk: meson: meson8b: use of_clk_hw_register to
  register the clocks" because it's now moved to my other series at
  [0]
- dropped dts changes so this series exclusively targets clk-meson

Changes since v1 at [1]:
- fixed the license of the .yaml binding and added Rob's Reviewed-by
- drop unused syscon.h include (spotted by Jerome - thanks)
- drop fast_io from regmap_config and add max_register as suggested
  by Jerome
- dropped original patch #4 "clk: meson: meson8b: add the ddr_pll
  input for the audio clocks" because I could not test that yet (that
  patch was a forward-port from Amlogic's 3.10 BSP kernel)


[0] https://patchwork.kernel.org/cover/11248377/
[1] https://patchwork.kernel.org/cover/11155553/
[2] https://patchwork.kernel.org/cover/11214227/


Martin Blumenstingl (2):
  dt-bindings: clock: add the Amlogic Meson8 DDR clock controller
    binding
  clk: meson: add a driver for the Meson8/8b/8m2 DDR clock controller

 .../clock/amlogic,meson8-ddr-clkc.yaml        |  50 ++++++
 drivers/clk/meson/Makefile                    |   2 +-
 drivers/clk/meson/meson8-ddr.c                | 149 ++++++++++++++++++
 include/dt-bindings/clock/meson8-ddr-clkc.h   |   4 +
 4 files changed, 204 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/devicetree/bindings/clock/amlogic,meson8-ddr-clkc.yaml
 create mode 100644 drivers/clk/meson/meson8-ddr.c
 create mode 100644 include/dt-bindings/clock/meson8-ddr-clkc.h

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2.24.0