Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964960AbbD0PAa (ORCPT ); Mon, 27 Apr 2015 11:00:30 -0400 Received: from baptiste.telenet-ops.be ([195.130.132.51]:55759 "EHLO baptiste.telenet-ops.be" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964851AbbD0PA1 (ORCPT ); Mon, 27 Apr 2015 11:00:27 -0400 From: Geert Uytterhoeven To: Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , Marc Zyngier Cc: devicetree@vger.kernel.org, linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sh@vger.kernel.org, linux-kernel@vger.kernel.org, Geert Uytterhoeven Subject: [PATCH] ARM: gic: Document Power and Clock Domain optional properties Date: Mon, 27 Apr 2015 17:00:11 +0200 Message-Id: <1430146811-29862-1-git-send-email-geert+renesas@glider.be> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2432 Lines: 58 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 --- 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 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 linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/