Nah, I've found this code hard to maintain. I'm attaching simplified 
version.

Thanks,
Paul

On Wed, 1 Jul 2015, Paul Osmialowski wrote:

Hi Arnd,

Can you look at attached candidate for the third iteration? Is it any better 
now?

Thanks,
Paul

On Tue, 30 Jun 2015, Arnd Bergmann wrote:

quoted

 On Tuesday 30 June 2015 14:27:24 Paul Osmialowski wrote:

quoted

 Based on K70P256M150SF3RM.pdf K70 Sub-Family Reference Manual, Rev. 3.

 Signed-off-by: Paul Osmialowski [off-list ref]
 ---
  .../devicetree/bindings/clock/kinetis-clock.txt    |  63 +++
  arch/arm/boot/dts/kinetis.dtsi                     |  36 ++
  drivers/clk/Makefile                               |   1 +
  drivers/clk/clk-kinetis.c                          | 463 
  +++++++++++++++++++++
  4 files changed, 563 insertions(+)
  create mode 100644 
  Documentation/devicetree/bindings/clock/kinetis-clock.txt
  create mode 100644 drivers/clk/clk-kinetis.c

 diff --git a/Documentation/devicetree/bindings/clock/kinetis-clock.txt 
 b/Documentation/devicetree/bindings/clock/kinetis-clock.txt
 new file mode 100644
 index 0000000..63af6a5
 --- /dev/null
 +++ b/Documentation/devicetree/bindings/clock/kinetis-clock.txt
 @@ -0,0 +1,63 @@
 +* Clock bindings for Freescale Kinetis SoC
 +
 +Required properties:
 +- compatible: Should be "fsl,kinetis-cmu".
 +- reg: Two address ranges, one for the Clock Genetator register set,
 +	one for System Integration Module register set.
 +- Set of clock devices: one fixed-rate-root, fixed-rate clocks and 
 clock-gates.
 +
 +For clock-gate addresses see K70 Sub-Family Reference Manual, Rev. 3 
 pg. 341
 +and later. Notice that addresses are zero-based, so SIM_SCGC1 has 
 address 0,
 +SIM_SCGC2 has address 1 and so on. The second address component is the 
 bit
 +index.

 Please document the sub-nodes that are allowed, and the format
 of the clock specifiers.

quoted

 +
 +Example:
 +
 +cmu@40064000 {
 +	compatible = "fsl,kinetis-cmu";
 +	reg = <0x40064000 0x14>, <0x40047000 0x1100>;
 +
 +	mcg_outclk: fixed-rate-root@mcgout {
 +		device_type = "mcgout";
 +		#clock-cells = <0>;
 +	};
 +
 +	mcg_cclk: fixed-rate@cclk {

 '@' is a reserved character here that is used before the address
 of the device, so this has to be a hexadecimal number without leading
 '0x', and it should match the 'reg' property of the device.

quoted

 +		device_type = "cclk";
 +		#clock-cells = <0>;
 +		clocks = <&mcg_outclk>;
 +	};

 The device_type property here is not a standard identifier,
 and you don't list it as an optional or mandatory property.

 Please remove it and instead use the compatible property, the
 name or the address.

  Arnd