linux-kernel - [PATCH 2/2] Documentation: bcm7120-l2: Add Broadcom BCM7120-style L2 binding

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Message-Id: <1409265326-7579-3-git-send-email-f.fainelli@gmail.com>
Date:	Thu, 28 Aug 2014 15:35:26 -0700
From:	Florian Fainelli <f.fainelli@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	jason@...edaemon.net, tglx@...utronix.de,
	computersforpeace@...il.com,
	Florian Fainelli <f.fainelli@...il.com>
Subject: [PATCH 2/2] Documentation: bcm7120-l2: Add Broadcom BCM7120-style L2 binding

This patch adds the Device Tree binding document for the Broadcom
BCM7120-style Set-top-box Level 2 interrupt controller hardware.

Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
---
 .../interrupt-controller/brcm,bcm7120-l2-intc.txt  | 44 ++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/brcm,bcm7120-l2-intc.txt

diff --git a/Documentation/devicetree/bindings/interrupt-controller/brcm,bcm7120-l2-intc.txt b/Documentation/devicetree/bindings/interrupt-controller/brcm,bcm7120-l2-intc.txt
new file mode 100644
index 000000000000..3818ffed7347
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/brcm,bcm7120-l2-intc.txt
@@ -0,0 +1,44 @@
+Broadcom BCM7120-style Level 2 interrupt controller
+
+Required properties:
+
+- compatible: should be "brcm,bcm7120-l2-intc"
+- reg: specifies the base physical address and size of the registers
+- interrupt-controller: identifies the node as an interrupt controller
+- #interrupt-cells: specifies the number of cells needed to encode an interrupt
+  source, should be 1.
+- interrupt-parent: specifies the phandle to the parent interrupt controller
+  this one is cascaded from
+- interrupts: specifies the interrupt line(s) in the interrupt-parent domain
+  to be used for cascading
+- brcm,int-map-mask: 32-bits bit mask describing how the interrupts at this level
+  map to their respective parents. Should match exactly the number of interrupts
+  specified in the 'interrupts' property.
+
+Optional properties:
+
+- interrupt-names: if present, the litteral names for the parent interrupts
+  specified in the 'interrupts' property.
+
+- brcm,irq-can-wake: if present, this means the L2 controller can be used as a
+  wakeup source for system suspend/resume.
+
+- brcm,int-fwd-mask: if present, a 32-bits bit mask describing the interrupts
+  which need to be enabled in this controller to flow to the higher level
+  interrupt controller. This is typically needed for the UARTs interrupts to
+  flow through the top-level interrupt controller (e.g: ARM GIC on ARM-based
+  platforms).
+
+Example:
+
+irq0_intc: interrupt-controller@...06800 {
+	compatible = "brcm,bcm7120-l2-intc";
+	interrupt-parent = <&intc>;
+	#interrupt-cells = <1>;
+	reg = <0xf0406800 0x8>;
+	interrupt-controller;
+	interrupts = <0x0 0x42 0x0>, <0x0 0x40 0x0>;
+	interrupt-names = "upg_main", "upg_bsc";
+	brcm,int-map-mask = <0xeb8>, <0x140>;
+	brcm,int-fwd-mask = <0x7>;
+};
-- 
1.9.1

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