From d8e0364364d333feb4564bb7d7d983182b34427e Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Tue, 10 Jan 2012 22:15:45 +0000 Subject: ARM: smp_twd: add device tree support Add bindings to support DT discovery of the ARM Timer Watchdog (aka TWD). Only the timer side is converted by this patch. Acked-by: Rob Herring Signed-off-by: Marc Zyngier --- Documentation/devicetree/bindings/arm/twd.txt | 48 +++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 Documentation/devicetree/bindings/arm/twd.txt (limited to 'Documentation/devicetree/bindings') diff --git a/Documentation/devicetree/bindings/arm/twd.txt b/Documentation/devicetree/bindings/arm/twd.txt new file mode 100644 index 000000000000..75b8610939fa --- /dev/null +++ b/Documentation/devicetree/bindings/arm/twd.txt @@ -0,0 +1,48 @@ +* ARM Timer Watchdog + +ARM 11MP, Cortex-A5 and Cortex-A9 are often associated with a per-core +Timer-Watchdog (aka TWD), which provides both a per-cpu local timer +and watchdog. + +The TWD is usually attached to a GIC to deliver its two per-processor +interrupts. + +** Timer node required properties: + +- compatible : Should be one of: + "arm,cortex-a9-twd-timer" + "arm,cortex-a5-twd-timer" + "arm,arm11mp-twd-timer" + +- interrupts : One interrupt to each core + +- reg : Specify the base address and the size of the TWD timer + register window. + +Example: + + twd-timer@2c000600 { + compatible = "arm,arm11mp-twd-timer""; + reg = <0x2c000600 0x20>; + interrupts = <1 13 0xf01>; + }; + +** Watchdog node properties: + +- compatible : Should be one of: + "arm,cortex-a9-twd-wdt" + "arm,cortex-a5-twd-wdt" + "arm,arm11mp-twd-wdt" + +- interrupts : One interrupt to each core + +- reg : Specify the base address and the size of the TWD watchdog + register window. + +Example: + + twd-watchdog@2c000620 { + compatible = "arm,arm11mp-twd-wdt"; + reg = <0x2c000620 0x20>; + interrupts = <1 14 0xf01>; + }; -- cgit v1.2.3