56 lines
1.7 KiB
Plaintext
56 lines
1.7 KiB
Plaintext
|
* Freescale VF610 PORT/GPIO module
|
||
|
|
|
||
|
|
The Freescale PORT/GPIO modules are two adjacent modules providing GPIO
|
||
|
|
functionality. Each pair serves 32 GPIOs. The VF610 has 5 instances of
|
||
|
|
each, and each PORT module has its own interrupt.
|
||
|
|
|
||
|
|
Required properties for GPIO node:
|
||
|
|
- compatible : Should be "fsl,<soc>-gpio", currently "fsl,vf610-gpio"
|
||
|
|
- reg : The first reg tuple represents the PORT module, the second tuple
|
||
|
|
the GPIO module.
|
||
|
|
- interrupts : Should be the port interrupt shared by all 32 pins.
|
||
|
|
- gpio-controller : Marks the device node as a gpio controller.
|
||
|
|
- #gpio-cells : Should be two. The first cell is the pin number and
|
||
|
|
the second cell is used to specify the gpio polarity:
|
||
|
|
0 = active high
|
||
|
|
1 = active low
|
||
|
|
- interrupt-controller: Marks the device node as an interrupt controller.
|
||
|
|
- #interrupt-cells : Should be 2. The first cell is the GPIO number.
|
||
|
|
The second cell bits[3:0] is used to specify trigger type and level flags:
|
||
|
|
1 = low-to-high edge triggered.
|
||
|
|
2 = high-to-low edge triggered.
|
||
|
|
4 = active high level-sensitive.
|
||
|
|
8 = active low level-sensitive.
|
||
|
|
|
||
|
|
Note: Each GPIO port should have an alias correctly numbered in "aliases"
|
||
|
|
node.
|
||
|
|
|
||
|
|
Examples:
|
||
|
|
|
||
|
|
aliases {
|
||
|
|
gpio0 = &gpio1;
|
||
|
|
gpio1 = &gpio2;
|
||
|
|
};
|
||
|
|
|
||
|
|
gpio1: gpio@40049000 {
|
||
|
|
compatible = "fsl,vf610-gpio";
|
||
|
|
reg = <0x40049000 0x1000 0x400ff000 0x40>;
|
||
|
|
interrupts = <0 107 IRQ_TYPE_LEVEL_HIGH>;
|
||
|
|
gpio-controller;
|
||
|
|
#gpio-cells = <2>;
|
||
|
|
interrupt-controller;
|
||
|
|
#interrupt-cells = <2>;
|
||
|
|
gpio-ranges = <&iomuxc 0 0 32>;
|
||
|
|
};
|
||
|
|
|
||
|
|
gpio2: gpio@4004a000 {
|
||
|
|
compatible = "fsl,vf610-gpio";
|
||
|
|
reg = <0x4004a000 0x1000 0x400ff040 0x40>;
|
||
|
|
interrupts = <0 108 IRQ_TYPE_LEVEL_HIGH>;
|
||
|
|
gpio-controller;
|
||
|
|
#gpio-cells = <2>;
|
||
|
|
interrupt-controller;
|
||
|
|
#interrupt-cells = <2>;
|
||
|
|
gpio-ranges = <&iomuxc 0 32 32>;
|
||
|
|
};
|