On 05/20/2014 10:13 PM, Tomasz Figa wrote:
> This patch introduces a driver that handles configuration of CLKOUT pin
> of Exynos SoCs that can be used to output certain clocks from inside of
> the SoC to a dedicated output pin.
>
> Signed-off-by: Tomasz Figa <t.figa@xxxxxxxxxxx>
> ---
> .../devicetree/bindings/arm/samsung/pmu.txt | 30 ++++
> drivers/clk/samsung/Makefile | 1 +
> drivers/clk/samsung/clk-exynos-clkout.c | 153 +++++++++++++++++++++
> 3 files changed, 184 insertions(+)
> create mode 100644 drivers/clk/samsung/clk-exynos-clkout.c
>
> diff --git a/Documentation/devicetree/bindings/arm/samsung/pmu.txt b/Documentation/devicetree/bindings/arm/samsung/pmu.txt
> index b562634..5ed94a9 100644
> --- a/Documentation/devicetree/bindings/arm/samsung/pmu.txt
> +++ b/Documentation/devicetree/bindings/arm/samsung/pmu.txt
> @@ -11,8 +11,38 @@ Properties:
>
> - reg : offset and length of the register set.
>
> + - #clock-cells : must be <1>, since PMU requires once cell as clock specifier.
s/once/one
> + The single specifier cell is used as index to list of clocks
> + provided by PMU, which is currently:
> + 0 : SoC clock output (CLKOUT pin)
Will it make more sense if we add a macro for this clock number that
would be referred in the device tree files?
> +Example of clock consumer :
> +
> +usb3503: usb3503@08 {
> + /* ... */
> + clock-names = "refclk";
> + clocks = <&pmu_system_controller 0>;
> + /* ... */
> };
--
Tushar Behera
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