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| author | Peter Korsgaard <jacmet@sunsite.dk> | 2010-01-07 17:57:46 +0100 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2010-05-17 10:48:28 -0500 |
| commit | 345e5c8a1cc30ebd527bcc122d9540538942f1ba (patch) | |
| tree | 7a413e2b6360cb5d8936e5b083279297f08a3080 /Documentation/powerpc/dts-bindings | |
| parent | 1ed31d6db90d51010545921e59d369d2f92b7ac2 (diff) | |
| download | linux-345e5c8a1cc30ebd527bcc122d9540538942f1ba.tar.gz linux-345e5c8a1cc30ebd527bcc122d9540538942f1ba.tar.bz2 linux-345e5c8a1cc30ebd527bcc122d9540538942f1ba.zip | |
powerpc: Add interrupt support to mpc8xxx_gpio
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Acked-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'Documentation/powerpc/dts-bindings')
| -rw-r--r-- | Documentation/powerpc/dts-bindings/fsl/8xxx_gpio.txt | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/Documentation/powerpc/dts-bindings/fsl/8xxx_gpio.txt b/Documentation/powerpc/dts-bindings/fsl/8xxx_gpio.txt index d015dcec4011..b0019eb5330e 100644 --- a/Documentation/powerpc/dts-bindings/fsl/8xxx_gpio.txt +++ b/Documentation/powerpc/dts-bindings/fsl/8xxx_gpio.txt @@ -11,7 +11,7 @@ Required properties: 83xx, "fsl,mpc8572-gpio" for 85xx and "fsl,mpc8610-gpio" for 86xx. - #gpio-cells : Should be two. The first cell is the pin number and the second cell is used to specify optional parameters (currently unused). - - interrupts : Interrupt mapping for GPIO IRQ (currently unused). + - interrupts : Interrupt mapping for GPIO IRQ. - interrupt-parent : Phandle for the interrupt controller that services interrupts for this device. - gpio-controller : Marks the port as GPIO controller. @@ -38,3 +38,23 @@ Example of gpio-controller nodes for a MPC8347 SoC: See booting-without-of.txt for details of how to specify GPIO information for devices. + +To use GPIO pins as interrupt sources for peripherals, specify the +GPIO controller as the interrupt parent and define GPIO number + +trigger mode using the interrupts property, which is defined like +this: + +interrupts = <number trigger>, where: + - number: GPIO pin (0..31) + - trigger: trigger mode: + 2 = trigger on falling edge + 3 = trigger on both edges + +Example of device using this is: + + funkyfpga@0 { + compatible = "funky-fpga"; + ... + interrupts = <4 3>; + interrupt-parent = <&gpio1>; + }; |