# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/pinctrl/mediatek,mt8365-pinctrl.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: MediaTek MT8365 Pin Controller
maintainers:
- Zhiyong Tao <zhiyong.tao@mediatek.com>
- Bernhard Rosenkränzer <bero@baylibre.com>
description:
The MediaTek's MT8365 Pin controller is used to control SoC pins.
properties:
compatible:
const: mediatek,mt8365-pinctrl
reg:
maxItems: 1
mediatek,pctl-regmap:
$ref: /schemas/types.yaml#/definitions/phandle-array
items:
maxItems: 1
minItems: 1
maxItems: 2
description:
Should be phandles of the syscfg node.
gpio-controller: true
"#gpio-cells":
const: 2
description:
Number of cells in GPIO specifier. Since the generic GPIO binding is used,
the amount of cells must be specified as 2. See the below mentioned gpio
binding representation for description of particular cells.
interrupt-controller: true
interrupts:
maxItems: 1
"#interrupt-cells":
const: 2
patternProperties:
"-pins$":
type: object
additionalProperties: false
patternProperties:
"pins$":
type: object
additionalProperties: false
description:
A pinctrl node should contain at least one subnode 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.
$ref: /schemas/pinctrl/pincfg-node.yaml
properties:
pinmux:
description:
Integer array, represents gpio pin number and mux setting.
Supported pin number and mux varies for different SoCs, and are
defined as macros in <soc>-pinfunc.h directly.
bias-disable: true
bias-pull-up:
oneOf:
- type: boolean
- enum: [100, 101, 102, 103]
description: Pull up R1/R0 type define value.
description: |
For pull up type is normal, it don't need add R1/R0 define.
For pull up type is R1/R0 type, it can add value to set different
resistance. Valid arguments are described as below:
100: (R1, R0) = (0, 0) which means R1 disabled and R0 disabled.
101: (R1, R0) = (0, 1) which means R1 disabled and R0 enabled.
102: (R1, R0) = (1, 0) which means R1 enabled and R0 disabled.
103: (R1, R0) = (1, 1) which means R1 enabled and R0 enabled.
bias-pull-down:
oneOf:
- type: boolean
- enum: [100, 101, 102, 103]
description: Pull down R1/R0 type define value.
description: |
For pull down type is normal, it don't need add R1/R0 define.
For pull down type is R1/R0 type, it can add value to set
different resistance. Valid arguments are described as below:
100: (R1, R0) = (0, 0) which means R1 disabled and R0 disabled.
101: (R1, R0) = (0, 1) which means R1 disabled and R0 enabled.
102: (R1, R0) = (1, 0) which means R1 enabled and R0 disabled.
103: (R1, R0) = (1, 1) which means R1 enabled and R0 enabled.
drive-strength:
enum: [2, 4, 6, 8, 10, 12, 14, 16]
input-enable: true
input-disable: true
output-low: true
output-high: true
input-schmitt-enable: true
input-schmitt-disable: true
drive-strength-microamp:
enum: [125, 250, 500, 1000]
mediatek,drive-strength-adv:
deprecated: true
description: |
DEPRECATED: Please use drive-strength-microamp instead.
Describe the specific driving setup property.
For I2C pins, the existing generic driving setup can only support
2/4/6/8/10/12/14/16mA driving. But in specific driving setup, they
can support 0.125/0.25/0.5/1mA adjustment. If we enable specific
driving setup, the existing generic setup will be disabled.
The specific driving setup is controlled by E1E0EN.
When E1=0/E0=0, the strength is 0.125mA.
When E1=0/E0=1, the strength is 0.25mA.
When E1=1/E0=0, the strength is 0.5mA.
When E1=1/E0=1, the strength is 1mA.
EN is used to enable or disable the specific driving setup.
Valid arguments are described as below:
0: (E1, E0, EN) = (0, 0, 0)
1: (E1, E0, EN) = (0, 0, 1)
2: (E1, E0, EN) = (0, 1, 0)
3: (E1, E0, EN) = (0, 1, 1)
4: (E1, E0, EN) = (1, 0, 0)
5: (E1, E0, EN) = (1, 0, 1)
6: (E1, E0, EN) = (1, 1, 0)
7: (E1, E0, EN) = (1, 1, 1)
So the valid arguments are from 0 to 7.
$ref: /schemas/types.yaml#/definitions/uint32
enum: [0, 1, 2, 3, 4, 5, 6, 7]
mediatek,pull-up-adv:
deprecated: true
description: |
DEPRECATED: Please use bias-pull-up instead.
Pull up settings for 2 pull resistors, R0 and R1. User can
configure those special pins. Valid arguments are described as
below:
0: (R1, R0) = (0, 0) which means R1 disabled and R0 disabled.
1: (R1, R0) = (0, 1) which means R1 disabled and R0 enabled.
2: (R1, R0) = (1, 0) which means R1 enabled and R0 disabled.
3: (R1, R0) = (1, 1) which means R1 enabled and R0 enabled.
$ref: /schemas/types.yaml#/definitions/uint32
enum: [0, 1, 2, 3]
mediatek,pull-down-adv:
deprecated: true
description: |
DEPRECATED: Please use bias-pull-down instead.
Pull down settings for 2 pull resistors, R0 and R1. User can
configure those special pins. Valid arguments are described as
below:
0: (R1, R0) = (0, 0) which means R1 disabled and R0 disabled.
1: (R1, R0) = (0, 1) which means R1 disabled and R0 enabled.
2: (R1, R0) = (1, 0) which means R1 enabled and R0 disabled.
3: (R1, R0) = (1, 1) which means R1 enabled and R0 enabled.
$ref: /schemas/types.yaml#/definitions/uint32
enum: [0, 1, 2, 3]
mediatek,tdsel:
description:
An integer describing the steps for output level shifter duty
cycle when asserted (high pulse width adjustment). Valid arguments
are from 0 to 15.
$ref: /schemas/types.yaml#/definitions/uint32
mediatek,rdsel:
description:
An integer describing the steps for input level shifter duty cycle
when asserted (high pulse width adjustment). Valid arguments are
from 0 to 63.
$ref: /schemas/types.yaml#/definitions/uint32
required:
- pinmux
required:
- compatible
- reg
- gpio-controller
- "#gpio-cells"
allOf:
- $ref: pinctrl.yaml#
additionalProperties: false
examples:
- |
#include <dt-bindings/interrupt-controller/arm-gic.h>
#include <dt-bindings/pinctrl/mt8365-pinfunc.h>
soc {
#address-cells = <2>;
#size-cells = <2>;
pio: pinctrl@1000b000 {
compatible = "mediatek,mt8365-pinctrl";
reg = <0 0x1000b000 0 0x1000>;
mediatek,pctl-regmap = <&syscfg_pctl>;
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupt-cells = <2>;
interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_HIGH>;
pio-pins {
pins {
pinmux = <MT8365_PIN_59_SDA1__FUNC_SDA1_0>, <MT8365_PIN_60_SCL1__FUNC_SCL1_0>;
mediatek,pull-up-adv = <3>;
bias-pull-up;
};
};
};
};