| Heiko Stuebner | f0774d4 | 2013-04-04 14:55:10 +0900 | [diff] [blame] | 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 | }; |