78 lines
1.8 KiB
YAML
78 lines
1.8 KiB
YAML
|
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
|
||
|
|
%YAML 1.2
|
||
|
|
---
|
||
|
|
$id: http://devicetree.org/schemas/gpio/aspeed,sgpio.yaml#
|
||
|
|
$schema: http://devicetree.org/meta-schemas/core.yaml#
|
||
|
|
|
||
|
|
title: Aspeed SGPIO controller
|
||
|
|
|
||
|
|
maintainers:
|
||
|
|
- Andrew Jeffery <andrew@aj.id.au>
|
||
|
|
|
||
|
|
description:
|
||
|
|
This SGPIO controller is for ASPEED AST2400, AST2500 and AST2600 SoC,
|
||
|
|
AST2600 have two sgpio master one with 128 pins another one with 80 pins,
|
||
|
|
AST2500/AST2400 have one sgpio master with 80 pins. Each of the Serial
|
||
|
|
GPIO pins can be programmed to support the following options
|
||
|
|
- Support interrupt option for each input port and various interrupt
|
||
|
|
sensitivity option (level-high, level-low, edge-high, edge-low)
|
||
|
|
- Support reset tolerance option for each output port
|
||
|
|
- Directly connected to APB bus and its shift clock is from APB bus clock
|
||
|
|
divided by a programmable value.
|
||
|
|
- Co-work with external signal-chained TTL components (74LV165/74LV595)
|
||
|
|
|
||
|
|
properties:
|
||
|
|
compatible:
|
||
|
|
enum:
|
||
|
|
- aspeed,ast2400-sgpio
|
||
|
|
- aspeed,ast2500-sgpio
|
||
|
|
- aspeed,ast2600-sgpiom
|
||
|
|
|
||
|
|
reg:
|
||
|
|
maxItems: 1
|
||
|
|
|
||
|
|
gpio-controller: true
|
||
|
|
|
||
|
|
'#gpio-cells':
|
||
|
|
const: 2
|
||
|
|
|
||
|
|
interrupts:
|
||
|
|
maxItems: 1
|
||
|
|
|
||
|
|
interrupt-controller: true
|
||
|
|
|
||
|
|
clocks:
|
||
|
|
maxItems: 1
|
||
|
|
|
||
|
|
ngpios: true
|
||
|
|
|
||
|
|
bus-frequency: true
|
||
|
|
|
||
|
|
required:
|
||
|
|
- compatible
|
||
|
|
- reg
|
||
|
|
- gpio-controller
|
||
|
|
- '#gpio-cells'
|
||
|
|
- interrupts
|
||
|
|
- interrupt-controller
|
||
|
|
- ngpios
|
||
|
|
- clocks
|
||
|
|
- bus-frequency
|
||
|
|
|
||
|
|
additionalProperties: false
|
||
|
|
|
||
|
|
examples:
|
||
|
|
- |
|
||
|
|
#include <dt-bindings/clock/aspeed-clock.h>
|
||
|
|
sgpio: sgpio@1e780200 {
|
||
|
|
#gpio-cells = <2>;
|
||
|
|
compatible = "aspeed,ast2500-sgpio";
|
||
|
|
gpio-controller;
|
||
|
|
interrupts = <40>;
|
||
|
|
reg = <0x1e780200 0x0100>;
|
||
|
|
clocks = <&syscon ASPEED_CLK_APB>;
|
||
|
|
interrupt-controller;
|
||
|
|
ngpios = <80>;
|
||
|
|
bus-frequency = <12000000>;
|
||
|
|
};
|