staging: mt7621-gpio: dt-bindings: update documentation for #interrupt-cells property

[mirror_ubuntu-hirsute-kernel.git] / drivers / staging / mt7621-gpio / mediatek,mt7621-gpio.txt

diff --git a/drivers/staging/mt7621-gpio/mediatek,mt7621-gpio.txt b/drivers/staging/mt7621-gpio/mediatek,mt7621-gpio.txt
index 94caba74de12da5438c08b861e2542fbf10e2d48..30d8a0225aa1b2a8b3513b4f51d74b82bfe233f9 100644 (file)
--- a/drivers/staging/mt7621-gpio/mediatek,mt7621-gpio.txt
+++ b/drivers/staging/mt7621-gpio/mediatek,mt7621-gpio.txt
@@ -15,7 +15,13 @@ Required properties for the top level node:
 - interrupt-parent : phandle of the parent interrupt controller.
 - interrupts : Interrupt specifier for the controllers interrupt.
 - interrupt-controller : Mark the device node as an interrupt controller.
-- #interrupt-cells : Should be 1. The first cell is the GPIO number.
+- #interrupt-cells : Should be 2. The first cell defines the interrupt number.
+   The second cell bits[3:0] is used to specify trigger type as follows:
+       - 1 = low-to-high edge triggered.
+       - 2 = high-to-low edge triggered.
+       - 4 = active high level-sensitive.
+       - 8 = active low level-sensitive.
+
 
 Required properties for the GPIO bank node:
 - compatible:
@@ -37,7 +43,7 @@ Example:
                interrupt-parent = <&gic>;
                interrupts = <GIC_SHARED 12 IRQ_TYPE_LEVEL_HIGH>;
                interrupt-controller;
-               #interrupt-cells = <1>;
+               #interrupt-cells = <2>;
 
                gpio0: bank@0 {
                        reg = <0>;