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authorPeter Korsgaard <jacmet@sunsite.dk>2010-01-07 16:57:46 (GMT)
committerKumar Gala <galak@kernel.crashing.org>2010-05-17 15:48:28 (GMT)
commit345e5c8a1cc30ebd527bcc122d9540538942f1ba (patch)
tree7a413e2b6360cb5d8936e5b083279297f08a3080 /Documentation/powerpc
parent1ed31d6db90d51010545921e59d369d2f92b7ac2 (diff)
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')
-rw-r--r--Documentation/powerpc/dts-bindings/fsl/8xxx_gpio.txt22
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 d015dce..b0019eb 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>;
+ };

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