[tip:irq/core] irqchip/gic: Document optional Clock and Power Domain properties

[tip-bot for Geert Uytterhoeven <tipbot@zytor.com>]

Commit-ID:  afbbd23381767aec5717ce07736f3a165ef724cd
Gitweb:     http://git.kernel.org/tip/afbbd23381767aec5717ce07736f3a165ef724cd
Author:     Geert Uytterhoeven <geert+renesas@glider.be>
AuthorDate: Mon, 14 Sep 2015 22:06:44 +0200
Committer:  Thomas Gleixner <tglx@linutronix.de>
CommitDate: Tue, 22 Sep 2015 12:51:18 +0200

irqchip/gic: Document optional Clock and Power Domain properties

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>
Acked-by: Rob Herring <robh+dt@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Link: http://lkml.kernel.org/r/1442261204-30931-3-git-send-email-geert%2Brenesas@glider.be
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 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 2474285..cc56021 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 {