On some SoCs, the GIC may be part of a PM Domain (hardware Power and/or Clock Domain). Document the related optional DT properties. 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@xxxxxxxxx> --- To preserve DT stability, we would like to add these properties to the affected shmobile dtsi files. On Thu, Mar 26, 2015 at 11:39 AM, Marc Zyngier <marc.zyngier@xxxxxxx> wrote: > On 25/03/15 21:19, Geert Uytterhoeven wrote: >> I would like to add the clock and GIC dependency on the clock in the DTS now, >> for reasons of DTS stability. But that means I need a temporary workaround >> to avoid the clock from being disabled, until the GIC driver handles this. >> >> I don't expect a fix for the GIC code to just show up magically. I just wanted >> you to be aware of the problem. GIC is not the only problematic module here, >> there are others, cfr. the last slide of [2]. > > As long as there is an agreement from the DT people on the presence of > that extra property in the GIC node, I'm happy with that. I'd like it to > be documented though. Full thread at http://lists.infradead.org/pipermail/linux-arm-kernel/2015-March/331876.html Documentation/devicetree/bindings/arm/gic.txt | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/Documentation/devicetree/bindings/arm/gic.txt b/Documentation/devicetree/bindings/arm/gic.txt index 2da059a4790cb3c6..b21113b35f085f27 100644 --- a/Documentation/devicetree/bindings/arm/gic.txt +++ b/Documentation/devicetree/bindings/arm/gic.txt @@ -58,6 +58,14 @@ Optional regions, used when the GIC doesn't have banked registers. The offset is cpu-offset * cpu-nr. +- 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. + +- clocks : A phandle and clock specifier as defined by bindings of + the clock controller specified by phandle, used when the GIC + is part of a Clock Domain. + Example: intc: interrupt-controller@fff11000 { -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
