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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/pinctrl/mediatek,mt6893-pinctrl.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: MediaTek MT6893 Pin Controller
maintainers:
- AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
description:
The MediaTek's MT6893 Pin controller is used to control SoC pins.
properties:
compatible:
const: mediatek,mt6893-pinctrl
reg:
items:
- description: pin controller base
- description: rm group IO
- description: bm group IO
- description: lm group IO
- description: lb group IO
- description: rt group IO
- description: lt group IO
- description: tm group IO
- description: External Interrupt (EINT) controller base
reg-names:
items:
- const: base
- const: rm
- const: bm
- const: lm
- const: lb
- const: rt
- const: lt
- const: tm
- const: eint
gpio-controller: true
'#gpio-cells':
description:
Number of cells in GPIO specifier. Since the generic GPIO binding is used,
the amount of cells must be specified as 2. See the below mentioned gpio
binding representation for description of particular cells.
const: 2
gpio-ranges:
maxItems: 1
gpio-line-names: true
interrupts:
description: The interrupt outputs to sysirq
maxItems: 1
interrupt-controller: true
'#interrupt-cells':
const: 2
# PIN CONFIGURATION NODES
patternProperties:
'-pins$':
type: object
additionalProperties: false
patternProperties:
'^pins':
type: object
allOf:
- $ref: /schemas/pinctrl/pincfg-node.yaml
- $ref: /schemas/pinctrl/pinmux-node.yaml
description:
A pinctrl node should contain at least one subnodes representing the
pinctrl groups available on the machine. Each subnode will list the
pins it needs, and how they should be configured, with regard to muxer
configuration, pullups, drive strength, input enable/disable and input
schmitt.
properties:
pinmux:
description:
Integer array, represents gpio pin number and mux setting.
Supported pin number and mux are defined as macros in
arch/arm64/boot/dts/mediatek/mt8196-pinfunc.h for this SoC.
drive-strength:
enum: [2, 4, 6, 8, 10, 12, 14, 16]
drive-strength-microamp:
enum: [125, 250, 500, 1000]
bias-pull-down:
oneOf:
- type: boolean
- enum: [75000, 5000]
description: Pull down RSEL type resistance values (in ohms)
description:
For normal pull down type there is no need to specify a resistance
value, hence this can be specified as a boolean property.
For RSEL pull down type a resistance value (in ohms) can be added.
bias-pull-up:
oneOf:
- type: boolean
- enum: [10000, 5000, 4000, 3000]
description: Pull up RSEL type resistance values (in ohms)
description:
For normal pull up type there is no need to specify a resistance
value, hence this can be specified as a boolean property.
For RSEL pull up type a resistance value (in ohms) can be added.
bias-disable: true
output-high: true
output-low: true
input-enable: true
input-disable: true
input-schmitt-enable: true
input-schmitt-disable: true
required:
- pinmux
additionalProperties: false
required:
- compatible
- reg
- interrupts
- interrupt-controller
- '#interrupt-cells'
- gpio-controller
- '#gpio-cells'
- gpio-ranges
additionalProperties: false
examples:
- |
#include <dt-bindings/interrupt-controller/arm-gic.h>
#include <dt-bindings/pinctrl/mt65xx.h>
#define PINMUX_GPIO0__FUNC_GPIO0 (MTK_PIN_NO(0) | 0)
#define PINMUX_GPIO99__FUNC_SCL0 (MTK_PIN_NO(99) | 1)
#define PINMUX_GPIO100__FUNC_SDA0 (MTK_PIN_NO(100) | 1)
pio: pinctrl@10005000 {
compatible = "mediatek,mt6893-pinctrl";
reg = <0x10005000 0x1000>,
<0x11c20000 0x0200>,
<0x11d10000 0x0200>,
<0x11e20000 0x0200>,
<0x11e70000 0x0200>,
<0x11ea0000 0x0200>,
<0x11f20000 0x0200>,
<0x11f30000 0x0200>,
<0x1100b000 0x1000>;
reg-names = "base", "rm", "bm", "lm", "lb", "rt",
"lt", "tm", "eint";
gpio-controller;
#gpio-cells = <2>;
gpio-ranges = <&pio 0 0 220>;
interrupt-controller;
interrupts = <GIC_SPI 212 IRQ_TYPE_LEVEL_HIGH 0>;
#interrupt-cells = <2>;
gpio-pins {
pins {
pinmux = <PINMUX_GPIO0__FUNC_GPIO0>;
bias-pull-up = <4000>;
drive-strength = <6>;
};
};
i2c0-pins {
pins-bus {
pinmux = <PINMUX_GPIO99__FUNC_SCL0>,
<PINMUX_GPIO100__FUNC_SDA0>;
bias-pull-down = <75000>;
drive-strength-microamp = <1000>;
};
};
};
|
