# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/pinctrl/mediatek,mt8195-pinctrl.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: MediaTek MT8195 Pin Controller
maintainers:
- Sean Wang <sean.wang@mediatek.com>
description:
The MediaTek's MT8195 Pin controller is used to control SoC pins.
properties:
compatible:
const: mediatek,mt8195-pinctrl
gpio-controller: true
'#gpio-cells':
description:
Number of cells in GPIO specifier. Since the generic GPIO binding is used,
the amount of cells must be specified as 2. See the below mentioned gpio
binding representation for description of particular cells.
const: 2
gpio-ranges:
description: GPIO valid number range.
maxItems: 1
gpio-line-names: true
reg:
description:
Physical address base for GPIO base registers. There are 8 GPIO physical
address base in mt8195.
maxItems: 8
reg-names:
description:
GPIO base register names.
maxItems: 8
interrupt-controller: true
'#interrupt-cells':
const: 2
interrupts:
description: The interrupt outputs to sysirq.
maxItems: 1
mediatek,rsel-resistance-in-si-unit:
type: boolean
description:
Identifying i2c pins pull up/down type which is RSEL. It can support RSEL
define or si unit value(ohm) to set different resistance.
# PIN CONFIGURATION NODES
patternProperties:
'-pins$':
type: object
additionalProperties: false
patternProperties:
'^pins':
type: object
additionalProperties: false
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.
An example of using macro:
pincontroller {
/* GPIO0 set as multifunction GPIO0 */
gpio-pins {
pins {
pinmux = <PINMUX_GPIO0__FUNC_GPIO0>;
}
};
/* GPIO8 set as multifunction SDA0 */
i2c0-pins {
pins {
pinmux = <PINMUX_GPIO8__FUNC_SDA0>;
}
};
};
$ref: pinmux-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 dt-bindings/pinctrl/<soc>-pinfunc.h directly.
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: [100, 101, 102, 103]
description: mt8195 pull down PUPD/R0/R1 type define value.
- enum: [200, 201, 202, 203, 204, 205, 206, 207]
description: mt8195 pull down RSEL type define value.
- enum: [75000, 5000]
description: mt8195 pull down RSEL type si unit value(ohm).
description: |
For pull down type is normal, it don't need add RSEL & R1R0 define
and resistance value.
For pull down type is PUPD/R0/R1 type, it can add R1R0 define to
set different resistance. It can support "MTK_PUPD_SET_R1R0_00" &
"MTK_PUPD_SET_R1R0_01" & "MTK_PUPD_SET_R1R0_10" &
"MTK_PUPD_SET_R1R0_11" define in mt8195.
For pull down type is RSEL, it can add RSEL define & resistance
value(ohm) to set different resistance by identifying property
"mediatek,rsel-resistance-in-si-unit".
It can support "MTK_PULL_SET_RSEL_000" & "MTK_PULL_SET_RSEL_001"
& "MTK_PULL_SET_RSEL_010" & "MTK_PULL_SET_RSEL_011"
& "MTK_PULL_SET_RSEL_100" & "MTK_PULL_SET_RSEL_101"
& "MTK_PULL_SET_RSEL_110" & "MTK_PULL_SET_RSEL_111"
define in mt8195. It can also support resistance value(ohm)
"75000" & "5000" in mt8195.
An example of using RSEL define:
pincontroller {
i2c0_pin {
pins {
pinmux = <PINMUX_GPIO8__FUNC_SDA0>;
bias-pull-down = <MTK_PULL_SET_RSEL_001>;
}
};
};
An example of using si unit resistance value(ohm):
&pio {
mediatek,rsel-resistance-in-si-unit;
}
pincontroller {
i2c0_pin {
pins {
pinmux = <PINMUX_GPIO8__FUNC_SDA0>;
bias-pull-down = <75000>;
}
};
};
bias-pull-up:
oneOf:
- type: boolean
- enum: [100, 101, 102, 103]
description: mt8195 pull up PUPD/R0/R1 type define value.
- enum: [200, 201, 202, 203, 204, 205, 206, 207]
description: mt8195 pull up RSEL type define value.
- enum: [1000, 1500, 2000, 3000, 4000, 5000, 10000, 75000]
description: mt8195 pull up RSEL type si unit value(ohm).
description: |
For pull up type is normal, it don't need add RSEL & R1R0 define
and resistance value.
For pull up type is PUPD/R0/R1 type, it can add R1R0 define to
set different resistance. It can support "MTK_PUPD_SET_R1R0_00" &
"MTK_PUPD_SET_R1R0_01" & "MTK_PUPD_SET_R1R0_10" &
"MTK_PUPD_SET_R1R0_11" define in mt8195.
For pull up type is RSEL, it can add RSEL define & resistance
value(ohm) to set different resistance by identifying property
"mediatek,rsel-resistance-in-si-unit".
It can support "MTK_PULL_SET_RSEL_000" & "MTK_PULL_SET_RSEL_001"
& "MTK_PULL_SET_RSEL_010" & "MTK_PULL_SET_RSEL_011"
& "MTK_PULL_SET_RSEL_100" & "MTK_PULL_SET_RSEL_101"
& "MTK_PULL_SET_RSEL_110" & "MTK_PULL_SET_RSEL_111"
define in mt8195. It can also support resistance value(ohm) "1000"
& "1500" & "2000" & "3000" & "4000" & "5000" & "10000" & "75000"
in mt8195.
An example of using RSEL define:
pincontroller {
i2c0-pins {
pins {
pinmux = <PINMUX_GPIO8__FUNC_SDA0>;
bias-pull-up = <MTK_PULL_SET_RSEL_001>;
}
};
};
An example of using si unit resistance value(ohm):
&pio {
mediatek,rsel-resistance-in-si-unit;
}
pincontroller {
i2c0-pins {
pins {
pinmux = <PINMUX_GPIO8__FUNC_SDA0>;
bias-pull-up = <1000>;
}
};
};
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
allOf:
- $ref: pinctrl.yaml#
required:
- compatible
- reg
- interrupts
- interrupt-controller
- '#interrupt-cells'
- gpio-controller
- '#gpio-cells'
- gpio-ranges
additionalProperties: false
examples:
- |
#include <dt-bindings/pinctrl/mt8195-pinfunc.h>
#include <dt-bindings/interrupt-controller/arm-gic.h>
#
pio: pinctrl@10005000 {
compatible = "mediatek,mt8195-pinctrl";
reg = <0x10005000 0x1000>,
<0x11d10000 0x1000>,
<0x11d30000 0x1000>,
<0x11d40000 0x1000>,
<0x11e20000 0x1000>,
<0x11eb0000 0x1000>,
<0x11f40000 0x1000>,
<0x1000b000 0x1000>;
reg-names = "iocfg0", "iocfg_bm", "iocfg_bl",
"iocfg_br", "iocfg_lm", "iocfg_rb",
"iocfg_tl", "eint";
gpio-controller;
#gpio-cells = <2>;
gpio-ranges = <&pio 0 0 144>;
interrupt-controller;
interrupts = <GIC_SPI 225 IRQ_TYPE_LEVEL_HIGH 0>;
#interrupt-cells = <2>;
pio-pins {
pins {
pinmux = <PINMUX_GPIO0__FUNC_GPIO0>;
output-low;
};
};
spi0-pins {
pins-spi {
pinmux = <PINMUX_GPIO132__FUNC_SPIM0_CSB>,
<PINMUX_GPIO134__FUNC_SPIM0_MO>,
<PINMUX_GPIO133__FUNC_SPIM0_CLK>;
bias-disable;
};
pins-spi-mi {
pinmux = <PINMUX_GPIO135__FUNC_SPIM0_MI>;
bias-pull-down;
};
};
i2c0-pins {
pins {
pinmux = <PINMUX_GPIO8__FUNC_SDA0>,
<PINMUX_GPIO9__FUNC_SCL0>;
bias-disable;
drive-strength-microamp = <1000>;
};
};
};