add Amlogic A1 clock controller driver

add support for Amlogic A1 clock driver, the clock includes 
three parts: peripheral clocks, pll clocks, CPU clocks.
sys pll and CPU clocks will be sent in next patch.

Changes since v1 at [1]:
-place A1 config alphabetically
-add actual reason for RO ops, CLK_IS_CRITICAL, CLK_IGNORE_UNUSED
-separate the driver into two driver: peripheral and pll driver
-delete CLK_IGNORE_UNUSED flag for pwm b/c/d/e/f clock, dsp clock
-delete the change in Kconfig.platforms, address to Kevin alone
-remove the useless comments
-modify the meson pll driver to support A1 PLLs

[1] https://lkml.kernel.org/r/1569411888-98116-1-git-send-ema...

Jian Hu (3):
  dt-bindings: clock: meson: add A1 clock controller bindings
  clk: meson: add support for A1 PLL clock ops
  clk: meson: a1: add support for Amlogic A1 clock driver

 .../devicetree/bindings/clock/amlogic,a1-clkc.yaml |  143 ++
 drivers/clk/meson/Kconfig                          |   10 +
 drivers/clk/meson/Makefile                         |    1 +
 drivers/clk/meson/a1-pll.c                         |  345 +++
 drivers/clk/meson/a1-pll.h                         |   56 +
 drivers/clk/meson/a1.c                             | 2264 ++++++++++++++++++++
 drivers/clk/meson/a1.h                             |  120 ++
 drivers/clk/meson/clk-pll.c                        |   66 +-
 drivers/clk/meson/clk-pll.h                        |    1 +
 include/dt-bindings/clock/a1-clkc.h                |   98 +
 include/dt-bindings/clock/a1-pll-clkc.h            |   16 +
 11 files changed, 3114 insertions(+), 6 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/clock/amlogic,a1-clkc.yaml
 create mode 100644 drivers/clk/meson/a1-pll.c
 create mode 100644 drivers/clk/meson/a1-pll.h
 create mode 100644 drivers/clk/meson/a1.c
 create mode 100644 drivers/clk/meson/a1.h
 create mode 100644 include/dt-bindings/clock/a1-clkc.h
 create mode 100644 include/dt-bindings/clock/a1-pll-clkc.h

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1.9.1