projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| f0774d41 HS |
1 | Samsung S3C24XX Interrupt Controllers |
| 2 | ||
| 3 | The S3C24XX SoCs contain a custom set of interrupt controllers providing a | |
| 4 | varying number of interrupt sources. The set consists of a main- and sub- | |
| 5 | controller and on newer SoCs even a second main controller. | |
| 6 | ||
| 7 | Required properties: | |
| 8 | - compatible: Compatible property value should be "samsung,s3c2410-irq" | |
| 9 | for machines before s3c2416 and "samsung,s3c2416-irq" for s3c2416 and later. | |
| 10 | ||
| 11 | - reg: Physical base address of the controller and length of memory mapped | |
| 12 | region. | |
| 13 | ||
| 14 | - interrupt-controller : Identifies the node as an interrupt controller | |
| 15 | ||
| 16 | - #interrupt-cells : Specifies the number of cells needed to encode an | |
| 17 | interrupt source. The value shall be 4 and interrupt descriptor shall | |
| 18 | have the following format: | |
| 19 | <ctrl_num parent_irq ctrl_irq type> | |
| 20 | ||
| 21 | ctrl_num contains the controller to use: | |
| 22 | - 0 ... main controller | |
| 23 | - 1 ... sub controller | |
| 24 | - 2 ... second main controller on s3c2416 and s3c2450 | |
| 25 | parent_irq contains the parent bit in the main controller and will be | |
| 26 | ignored in main controllers | |
| 27 | ctrl_irq contains the interrupt bit of the controller | |
| 28 | type contains the trigger type to use | |
| 29 | ||
| 30 | Example: | |
| 31 | ||
| 32 | interrupt-controller@4a000000 { | |
| 33 | compatible = "samsung,s3c2410-irq"; | |
| 34 | reg = <0x4a000000 0x100>; | |
| 35 | interrupt-controller; | |
| 36 | #interrupt-cells=<4>; | |
| 37 | }; | |
| 38 | ||
| 39 | [...] | |
| 40 | ||
| 41 | serial@50000000 { | |
| 42 | compatible = "samsung,s3c2410-uart"; | |
| 43 | reg = <0x50000000 0x4000>; | |
| 44 | interrupt-parent = <&subintc>; | |
| 45 | interrupts = <1 28 0 4>, <1 28 1 4>; | |
| 46 | }; | |
| 47 | ||
| 48 | rtc@57000000 { | |
| 49 | compatible = "samsung,s3c2410-rtc"; | |
| 50 | reg = <0x57000000 0x100>; | |
| 51 | interrupt-parent = <&intc>; | |
| 52 | interrupts = <0 30 0 3>, <0 8 0 3>; | |
| 53 | }; |