31 lines
1 KiB
Plaintext
31 lines
1 KiB
Plaintext
|
* 74XX MMIO GPIO driver
|
||
|
|
|
||
|
|
Required properties:
|
||
|
|
- compatible: Should contain one of the following:
|
||
|
|
"ti,741g125": for 741G125 (1-bit Input),
|
||
|
|
"ti,741g174": for 741G74 (1-bit Output),
|
||
|
|
"ti,742g125": for 742G125 (2-bit Input),
|
||
|
|
"ti,7474" : for 7474 (2-bit Output),
|
||
|
|
"ti,74125" : for 74125 (4-bit Input),
|
||
|
|
"ti,74175" : for 74175 (4-bit Output),
|
||
|
|
"ti,74365" : for 74365 (6-bit Input),
|
||
|
|
"ti,74174" : for 74174 (6-bit Output),
|
||
|
|
"ti,74244" : for 74244 (8-bit Input),
|
||
|
|
"ti,74273" : for 74273 (8-bit Output),
|
||
|
|
"ti,741624" : for 741624 (16-bit Input),
|
||
|
|
"ti,7416374": for 7416374 (16-bit Output).
|
||
|
|
- reg: Physical base address and length where IC resides.
|
||
|
|
- 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.
|
||
|
|
|
||
|
|
Example:
|
||
|
|
ctrl: gpio@30008004 {
|
||
|
|
compatible = "ti,74174";
|
||
|
|
reg = <0x30008004 0x1>;
|
||
|
|
gpio-controller;
|
||
|
|
#gpio-cells = <2>;
|
||
|
|
};
|