Add real clock support for Rockchip's RK3188

This series add a clock driver infrastructure for Rockchip SoCs in general and clock-definitions for the RK3188 in particular.

Due to the lack of any usable documentation of the RK3188 clocks, the clock tree is based on my own doc [0] collected by analyzing the clock_data code in current Rockchip kernels. As a result the gathered data may contain errors. So to prevent API issues with the clock-ids, the exported ones are currently limited to well understood or really measured clocks.

The previous attempt to define parts separately in the devicetree did not really fit with the clock structure, which became apparent with more knowledge about the clock tree and this new driver framework, heavily inspired by the Samsung clock driver, fits very well for clock controllers in Rockchip SoCs.

The whole structure should support Rockchip SoCs at least down to the RK28xx (ARM9) which all share a very similar setup of their clock controllers in PLL, divider and gate handling as well as the included softreset parts.

changes since v1:
- adapt to apply on current clk-next branch
- add saradc clock
- add rk3188a cru, which has a slightly different handling of one pll value (bwadj)

[0]
https://docs.google.com/document/d/1voaR9Xk3lisCQIG3ThySOSnSHBUequljQYnceFl
r53w/edit?usp=sharing

Heiko Stuebner (11):
clk: divider: add CLK_DIVIDER_READ_ONLY flag
clk: rockchip: add basic infrastructure
clk: rockchip: add clock type for pll clocks and pll used on rk3066
clk: rockchip: add special cpu clock type
clk: rockchip: add reset controller
dt-bindings: add documentation for rk3188 clock and reset unit
clk: rockchip: add clock driver for rk3188 clocks
ARM: rockchip: Select ARCH_HAS_RESET_CONTROLLER
ARM: dts: rk3188: add cru node and update device clocks to use it
ARM: dts: rockchip: move rk3188 core input clocks into main dtsi
ARM: dts: rockchip: remove the now obsolete rk3188-clocks.dtsi

 .../bindings/clock/rockchip,rk3188-cru.txt         |  74 ++++
 arch/arm/boot/dts/rk3188-clocks.dtsi               | 289 -------------
 arch/arm/boot/dts/rk3188.dtsi                      |  80 +++-
 arch/arm/mach-rockchip/Kconfig                     |   1 +
 drivers/clk/clk-divider.c                          |  10 +-
 drivers/clk/rockchip/Makefile                      |   6 +
 drivers/clk/rockchip/clk-cpu.c                     | 434

+++++++++++++++++++ drivers/clk/rockchip/clk-pll.c |
316 ++++++++++++++ drivers/clk/rockchip/clk-rk3188.c | 479
+++++++++++++++++++++ drivers/clk/rockchip/clk.c |
168 ++++++++ drivers/clk/rockchip/clk.h | 251
+++++++++++ drivers/clk/rockchip/softrst.c | 115 +++++

 include/dt-bindings/clock/rk3188-cru.h             |  81 ++++
 include/linux/clk-provider.h                       |   4 +
 14 files changed, 2013 insertions(+), 295 deletions(-)
 create mode 100644
Documentation/devicetree/bindings/clock/rockchip,rk3188-cru.txt delete mode
100644 arch/arm/boot/dts/rk3188-clocks.dtsi
 create mode 100644 drivers/clk/rockchip/clk-cpu.c
 create mode 100644 drivers/clk/rockchip/clk-pll.c
 create mode 100644 drivers/clk/rockchip/clk-rk3188.c
 create mode 100644 drivers/clk/rockchip/clk.c
 create mode 100644 drivers/clk/rockchip/clk.h
 create mode 100644 drivers/clk/rockchip/softrst.c
 create mode 100644 include/dt-bindings/clock/rk3188-cru.h