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authorHeiko Stuebner <heiko@sntech.de>2013-04-04 05:55:10 (GMT)
committerKukjin Kim <kgene.kim@samsung.com>2013-04-04 05:56:30 (GMT)
commitf0774d41da0e607b70e54ecc50aeb6684f54c2b1 (patch)
treedc188d9b2d30ca34e3ef1d82f347c35062dc3a38 /Documentation/devicetree/bindings/interrupt-controller
parentf5a25524508e68ac670b28db9112d3962dca4703 (diff)
irqchip: s3c24xx: add devicetree support
Add the necessary code to initialize the interrupt controller thru devicetree data using the irqchip infrastructure. Signed-off-by: Heiko Stuebner <heiko@sntech.de> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Rob Herring <rob.herring@calxeda.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Diffstat (limited to 'Documentation/devicetree/bindings/interrupt-controller')
-rw-r--r--Documentation/devicetree/bindings/interrupt-controller/samsung,s3c24xx-irq.txt53
1 files changed, 53 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/interrupt-controller/samsung,s3c24xx-irq.txt b/Documentation/devicetree/bindings/interrupt-controller/samsung,s3c24xx-irq.txt
new file mode 100644
index 0000000..c54c5a9
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/samsung,s3c24xx-irq.txt
@@ -0,0 +1,53 @@
+Samsung S3C24XX Interrupt Controllers
+
+The S3C24XX SoCs contain a custom set of interrupt controllers providing a
+varying number of interrupt sources. The set consists of a main- and sub-
+controller and on newer SoCs even a second main controller.
+
+Required properties:
+- compatible: Compatible property value should be "samsung,s3c2410-irq"
+ for machines before s3c2416 and "samsung,s3c2416-irq" for s3c2416 and later.
+
+- reg: Physical base address of the controller and length of memory mapped
+ region.
+
+- interrupt-controller : Identifies the node as an interrupt controller
+
+- #interrupt-cells : Specifies the number of cells needed to encode an
+ interrupt source. The value shall be 4 and interrupt descriptor shall
+ have the following format:
+ <ctrl_num parent_irq ctrl_irq type>
+
+ ctrl_num contains the controller to use:
+ - 0 ... main controller
+ - 1 ... sub controller
+ - 2 ... second main controller on s3c2416 and s3c2450
+ parent_irq contains the parent bit in the main controller and will be
+ ignored in main controllers
+ ctrl_irq contains the interrupt bit of the controller
+ type contains the trigger type to use
+
+Example:
+
+ interrupt-controller@4a000000 {
+ compatible = "samsung,s3c2410-irq";
+ reg = <0x4a000000 0x100>;
+ interrupt-controller;
+ #interrupt-cells=<4>;
+ };
+
+ [...]
+
+ serial@50000000 {
+ compatible = "samsung,s3c2410-uart";
+ reg = <0x50000000 0x4000>;
+ interrupt-parent = <&subintc>;
+ interrupts = <1 28 0 4>, <1 28 1 4>;
+ };
+
+ rtc@57000000 {
+ compatible = "samsung,s3c2410-rtc";
+ reg = <0x57000000 0x100>;
+ interrupt-parent = <&intc>;
+ interrupts = <0 30 0 3>, <0 8 0 3>;
+ };

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