Messages in this thread Patch in this message | | | From | Geert Uytterhoeven <> | Subject | [PATCH v2 2/2] irqchip: gic: Document optional Clock and Power Domain properties | Date | Mon, 14 Sep 2015 22:06:44 +0200 |
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Depending on the GIC variant, the GIC module has one or more clock inputs. Document the optional "clocks" and "clock-names" properties, and their possible values, based on the Technical Reference Manuals. optional.
Add the optional "power-domains" property.
This will allow to describe in DT the relationship between the GIC and the Clock and/or Power Domain topology on SoCs where this is relevant and needed for proper operation.
Note: As the current GIC driver doesn't support Runtime PM yet, PM Domain constraints must be handled elsewhere in e.g. platform code.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> --- Note: v1 was Acked-by: Rob Herring <robh@kernel.org>, but I didn't add it, due to the addition of clock-names.
v2: - Add "clock-names", - Document clock inputs on various GIC variants.
Clock inputs are based on the following documentation: - "ARM11 MPCore Processor Technical Reference Manual" (r2p0), - "Cortex-A9 MPCore Technical Reference Manual" (r4p1, r2p0), - "Cortex-A15 Technical Reference Manual" (r4p0, r2p0), - "CoreLink GIC-400 Generic Interrupt Controller Technical Reference Manual" (r0p1, r0p0), - "PrimeCell Generic Interrupt Controller (PL390) Technical Reference Manual" (r0p0).
I could not find clock input information in: - "ARM1176JZF Development Chip Technical Reference Manual" (r0p0), - "Cortex-A7 MPCore processors" (r0p5, r0p3).
Other: - "brcm,brahma-b15-gic" seems to be always used together with "arm,cortex-a15-gic".
No access to datasheets: - "qcom,msm-8660-qgic", - "qcom,msm-qgic2". --- Documentation/devicetree/bindings/arm/gic.txt | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
diff --git a/Documentation/devicetree/bindings/arm/gic.txt b/Documentation/devicetree/bindings/arm/gic.txt index 24742853ba460223..cc56021eb60babea 100644 --- a/Documentation/devicetree/bindings/arm/gic.txt +++ b/Documentation/devicetree/bindings/arm/gic.txt @@ -59,6 +59,21 @@ Optional regions, used when the GIC doesn't have banked registers. The offset is cpu-offset * cpu-nr. +- clocks : List of phandle and clock-specific pairs, one for each entry + in clock-names. +- clock-names : List of names for the GIC clock input(s). Valid clock names + depend on the GIC variant: + "ic_clk" (for "arm,arm11mp-gic") + "PERIPHCLKEN" (for "arm,cortex-a15-gic") + "PERIPHCLK", "PERIPHCLKEN" (for "arm,cortex-a9-gic") + "clk" (for "arm,gic-400") + "gclk" (for "arm,pl390") + +- power-domains : A phandle and PM domain specifier as defined by bindings of + the power controller specified by phandle, used when the GIC + is part of a Power or Clock Domain. + + Example: intc: interrupt-controller@fff11000 { -- 1.9.1
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