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dt-bindings: pinctrl: mt8195: change pull up/down description

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For supporting SI units in "bias-pull-down" & "bias-pull-up",
change pull up/down description
and add "mediatek,rsel_resistance_in_si_unit" description.

Signed-off-by: Zhiyong Tao <zhiyong.tao@mediatek.com>
Link: https://lore.kernel.org/r/20210924080632.28410-3-zhiyong.tao@mediatek.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Zhiyong Tao 2021-09-24 16:06:29 +08:00 committed by Linus Walleij
parent 26564c4435
commit 91e7edceda
1 changed files with 84 additions and 2 deletions
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86
Documentation/devicetree/bindings/pinctrl/pinctrl-mt8195.yaml
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@ -49,6 +49,12 @@ properties:
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$':
@ -82,9 +88,85 @@ patternProperties:
drive-strength:
enum: [2, 4, 6, 8, 10, 12, 14, 16]
bias-pull-down: true
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).
bias-pull-up: true
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:
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_pin {
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_pin {
pinmux = <PINMUX_GPIO8__FUNC_SDA0>;
bias-pull-up = <1000>;
};
};
bias-disable: true