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dt-bindings: pinctrl: mt8192: Add wrapping node for pin configurations

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On mt8192, the pinctrl node has pinctrl groups to group pin
configurations. Each pinctrl group contains one or more pinmux subnodes
to list needed pins and their configurations. By supporting multiple
subnodes, we can configure different pin characteristics
(driving/pull-up/pull-down/etc.) in a pinctrl group.

Update the mt8192 pinctrl dt-binding to add the missing pinctrl group
node that wraps the pinmux subnodes and update the example at the end.
While at it, also remove the example embedded in the description since
it is redundant to the already supplied example at the end.

This same change was done for mt8195 in commit 79dcd4e840 ("dt-bindings:
pinctrl: mt8195: add wrapping node of pin configurations").

Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20220315211936.442708-2-nfraprado@collabora.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Nícolas F. R. A. Prado 2022-03-15 17:19:33 -04:00 committed by Linus Walleij
parent 925fbe1f7e
commit 1c5fdf0f79
1 changed files with 59 additions and 57 deletions
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116
Documentation/devicetree/bindings/pinctrl/pinctrl-mt8192.yaml
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@ -51,62 +51,55 @@ properties:
#PIN CONFIGURATION NODES
patternProperties:
'^pins':
'-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 */
state_0_node_a {
pinmux = <PINMUX_GPIO0__FUNC_GPIO0>;
};
/* GPIO1 set as multifunction PWM */
state_0_node_b {
pinmux = <PINMUX_GPIO1__FUNC_PWM_1>;
};
};
$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:
description: |
It can support some arguments, such as MTK_DRIVE_4mA, MTK_DRIVE_6mA, etc. See
dt-bindings/pinctrl/mt65xx.h. It can only support 2/4/6/8/10/12/14/16mA in mt8192.
enum: [2, 4, 6, 8, 10, 12, 14, 16]
bias-pull-down: true
bias-pull-up: true
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
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.
$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:
description: |
It can support some arguments, such as MTK_DRIVE_4mA, MTK_DRIVE_6mA, etc. See
dt-bindings/pinctrl/mt65xx.h. It can only support 2/4/6/8/10/12/14/16mA in mt8192.
enum: [2, 4, 6, 8, 10, 12, 14, 16]
bias-pull-down: true
bias-pull-up: true
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
allOf:
- $ref: "pinctrl.yaml#"
@ -151,8 +144,17 @@ examples:
interrupts = <GIC_SPI 212 IRQ_TYPE_LEVEL_HIGH 0>;
#interrupt-cells = <2>;
pins {
pinmux = <PINMUX_GPIO0__FUNC_GPIO0>;
output-low;
spi1-default-pins {
pins-cs-mosi-clk {
pinmux = <PINMUX_GPIO157__FUNC_SPI1_A_CSB>,
<PINMUX_GPIO159__FUNC_SPI1_A_MO>,
<PINMUX_GPIO156__FUNC_SPI1_A_CLK>;
bias-disable;
};
pins-miso {
pinmux = <PINMUX_GPIO158__FUNC_SPI1_A_MI>;
bias-pull-down;
};
};
};