On Tue, Oct 01, 2019 at 02:54:33PM +0200, Lukasz Luba wrote:
> Add description for optional interrupt lines. It provides a new operation
> mode, which uses internal performance counters interrupt when overflow.
> This is more reliable than using default polling mode implemented in
> devfreq.
>
> Signed-off-by: Lukasz Luba <l.luba@xxxxxxxxxxxxxxxxxxx>
> ---
> .../bindings/memory-controllers/exynos5422-dmc.txt | 10 ++++++++++
> 1 file changed, 10 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/memory-controllers/exynos5422-dmc.txt b/Documentation/devicetree/bindings/memory-controllers/exynos5422-dmc.txt
> index 02aeb3b5a820..afc38aea6b1c 100644
> --- a/Documentation/devicetree/bindings/memory-controllers/exynos5422-dmc.txt
> +++ b/Documentation/devicetree/bindings/memory-controllers/exynos5422-dmc.txt
> @@ -31,6 +31,13 @@ Required properties for DMC device for Exynos5422:
> The register offsets are in the driver code and specyfic for this SoC
> type.
>
> +Optional properties for DMC device for Exynos5422:
> +- interrupt-parent : The parent interrupt controller.
> +- interrupts : Contains the IRQ line numbers for the DMC internal performance
> + event counters. Align with specification of the interrupt line(s) in the
> + interrupt-parent controller.
> +- interrupt-names : List of IRQ names.
Since the names are important (not the order) they are part of the
bindings and they must be listed here.
Best regards,
Krzysztof
> +
> Example:
>
> ppmu_dmc0_0: ppmu@10d00000 {
> @@ -70,4 +77,7 @@ Example:
> device-handle = <&samsung_K3QF2F20DB>;
> vdd-supply = <&buck1_reg>;
> samsung,syscon-clk = <&clock>;
> + interrupt-parent = <&combiner>;
> + interrupts = <16 0>, <16 1>;
> + interrupt-names = "drex_0", "drex_1";
> };
> --
> 2.17.1
>
