On Sat, Jul 30, 2016 at 12:45:40AM +0200, Rafał Miłecki wrote:
> From: Rafał Miłecki <rafal@xxxxxxxxxx>
>
> This clock is present on cheaper Northstar devices like BCM53573 or
> BCM47189 using Corex-A7. This driver uses PMU (Power Management Unit)
> to calculate clock rate and allows using it in a generic (clk_*) way.
>
> Signed-off-by: Rafał Miłecki <rafal@xxxxxxxxxx>
> ---
> V2: Rebase on top of clk-next
> Use ALP as parent clock
> Improve comments
> Switch from ioremap_nocache to ioremap
> Check of_clk_add_provide result for error
> ---
> .../devicetree/bindings/clock/brcm,ns-ilp.txt | 26 ++++
> drivers/clk/bcm/Makefile | 1 +
> drivers/clk/bcm/clk-ns-ilp.c | 147 +++++++++++++++++++++
> 3 files changed, 174 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/clock/brcm,ns-ilp.txt
> create mode 100644 drivers/clk/bcm/clk-ns-ilp.c
>
> diff --git a/Documentation/devicetree/bindings/clock/brcm,ns-ilp.txt b/Documentation/devicetree/bindings/clock/brcm,ns-ilp.txt
> new file mode 100644
> index 0000000..2c862a0
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/clock/brcm,ns-ilp.txt
> @@ -0,0 +1,26 @@
> +Broadcom Northstar ILP clock
> +============================
> +
> +This binding uses the common clock binding:
> + Documentation/devicetree/bindings/clock/clock-bindings.txt
> +
> +This binding is used for ILP clock on Broadcom Northstar devices using
> +Corex-A7 CPU. ILP clock depends on ALP one and has to be calculated on
> +runtime.
> +
> +Required properties:
> +- compatible: "brcm,ns-ilp"
> +- reg: iomem address range of PMU (Power Management Unit)
PMU would imply to me there is more than just 1 clock the block
controls and the compatible should reflect that if so.
> +- reg-names: "pmu", the only needed & supported reg right now
> +- clocks: has to reference an ALP clock
> +- #clock-cells: should be <0>
> +
> +Example:
> +
> +ilp: ilp {
ilp@18012000
> + compatible = "brcm,ns-ilp";
> + reg = <0x18012000 0x1000>;
> + reg-names = "pmu";
> + clocks = <&alp>;
> + #clock-cells = <0>;
> +};
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