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Commit 79dcd4e8 authored by Tinghan Shen's avatar Tinghan Shen Committed by Linus Walleij
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dt-bindings: pinctrl: mt8195: add wrapping node of pin configurations 

On mt8195, the pinctrl node has pinctrl groups to group pin
configurations by users' need. In each pinctrl group, it has
subnode(s) to list pins needed and pin configurations. By supporting
multiple subnodes, we can configure different pin characteristics
(driving/pull-up/pull-down/etc.) in a pinctrl group.

Update pinctrl-mt8195.yaml to add subnode in pinctrl groups and an
example to illustrate the usage.
Signed-off-by: default avatarTinghan Shen <tinghan.shen@mediatek.com>
Acked-by: default avatarAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20211220121825.6446-4-tinghan.shen@mediatek.comSigned-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
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Documentation/devicetree/bindings/pinctrl/pinctrl-mt8195.yaml
View file @ 79dcd4e8
......@@ -55,137 +55,159 @@ properties:
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
# PIN CONFIGURATION NODES
patternProperties:
'-pins$':
type: object
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_pin {
pinmux = <PINMUX_GPIO0__FUNC_GPIO0>;
};
/* GPIO8 set as multifunction SDA0 */
i2c0_pin {
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]
bias-pull-down:
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.
oneOf:
- 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).
An example of using RSEL define:
pincontroller {
i2c0_pin {
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 {
pinmux = <PINMUX_GPIO8__FUNC_SDA0>;
bias-pull-down = <75000>;
};
};
bias-pull-up:
additionalProperties: false
patternProperties:
'^pins':
type: object
additionalProperties: false
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.
oneOf:
- 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).
An example of using RSEL define:
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 {
i2c0_pin {
pinmux = <PINMUX_GPIO8__FUNC_SDA0>;
bias-pull-up = <MTK_PULL_SET_RSEL_001>;
/* GPIO0 set as multifunction GPIO0 */
gpio-pins {
pins {
pinmux = <PINMUX_GPIO0__FUNC_GPIO0>;
}
};
};
An example of using si unit resistance value(ohm):
&pio {
mediatek,rsel_resistance_in_si_unit;
}
pincontroller {
i2c0_pin {
pinmux = <PINMUX_GPIO8__FUNC_SDA0>;
bias-pull-up = <1000>;
/* GPIO8 set as multifunction SDA0 */
i2c0-pins {
pins {
pinmux = <PINMUX_GPIO8__FUNC_SDA0>;
}
};
};
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
$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]
bias-pull-down:
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.
oneOf:
- 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).
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:
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.
oneOf:
- 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).
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#"
......@@ -204,30 +226,46 @@ 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 {
pinmux = <PINMUX_GPIO0__FUNC_GPIO0>;
output-low;
};
};
#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;
};
};
};
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