linux-kernel - [PATCH v4 04/12] devicetree: Add bindings for the ATH79 interrupt controllers

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Message-Id: <1433029955-7346-5-git-send-email-albeu@free.fr>
Date:	Sun, 31 May 2015 01:52:27 +0200
From:	Alban Bedel <albeu@...e.fr>
To:	linux-mips@...ux-mips.org
Cc:	Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jason Cooper <jason@...edaemon.net>,
	Ralf Baechle <ralf@...ux-mips.org>,
	Alban Bedel <albeu@...e.fr>,
	Andrew Bresticker <abrestic@...omium.org>,
	Qais Yousef <qais.yousef@...tec.com>,
	Gabor Juhos <juhosg@...nwrt.org>, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v4 04/12] devicetree: Add bindings for the ATH79 interrupt controllers

Signed-off-by: Alban Bedel <albeu@...e.fr>
---
v2: * Fixed the node names to respect ePAPR
    * Removed the unneeded @0 on the node name
---
 .../interrupt-controller/qca,ath79-cpu-intc.txt    | 44 ++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/qca,ath79-cpu-intc.txt

diff --git a/Documentation/devicetree/bindings/interrupt-controller/qca,ath79-cpu-intc.txt b/Documentation/devicetree/bindings/interrupt-controller/qca,ath79-cpu-intc.txt
new file mode 100644
index 0000000..aabce78
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/qca,ath79-cpu-intc.txt
@@ -0,0 +1,44 @@
+Binding for Qualcomm Atheros AR7xxx/AR9XXX CPU interrupt controller
+
+On most SoC the IRQ controller need to flush the DDR FIFO before running
+the interrupt handler of some devices. This is configured using the
+qca,ddr-wb-channels and qca,ddr-wb-channel-interrupts properties.
+
+Required Properties:
+
+- compatible: has to be "qca,<soctype>-cpu-intc", "qca,ar7100-cpu-intc"
+  as fallback
+- interrupt-controller : Identifies the node as an interrupt controller
+- #interrupt-cells : Specifies the number of cells needed to encode interrupt
+		     source, should be 1 for intc
+
+Please refer to interrupts.txt in this directory for details of the common
+Interrupt Controllers bindings used by client devices.
+
+Optional Properties:
+
+- qca,ddr-wb-channel-interrupts: List of the interrupts needing a write
+  buffer flush
+- qca,ddr-wb-channels: List of phandles to the write buffer channels for
+  each interrupt. If qca,ddr-wb-channel-interrupts is not present the interrupt
+  default to the entry's index.
+
+Example:
+
+	interrupt-controller {
+		compatible = "qca,ar9132-cpu-intc", "qca,ar7100-cpu-intc";
+
+		interrupt-controller;
+		#interrupt-cells = <1>;
+
+		qca,ddr-wb-channel-interrupts = <2>, <3>, <4>, <5>;
+		qca,ddr-wb-channels = <&ddr_ctrl 3>, <&ddr_ctrl 2>,
+					<&ddr_ctrl 0>, <&ddr_ctrl 1>;
+	};
+
+	...
+
+	ddr_ctrl: memory-controller@...00000 {
+		...
+		#qca,ddr-wb-channel-cells = <1>;
+	};
-- 
2.0.0

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