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Message-ID: <df30578f-3760-a595-963c-35a90f373272@linaro.org>
Date: Wed, 15 Jun 2022 07:20:45 -0700
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Patrick Rudolph <patrick.rudolph@...ements.com>,
Linus Walleij <linus.walleij@...aro.org>
Cc: Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] dt-binding: Add cypress,cy8c95x0 binding
On 15/06/2022 03:49, Patrick Rudolph wrote:
> Added device tree binding documentation for
> Cypress CY8C95x0 I2C pin-controller.
>
> Signed-off-by: Patrick Rudolph <patrick.rudolph@...ements.com>
The subject is still wrong. You need subsystem prefix (pinctrl) and you
can skip final "binding" word, as it is implied by dt-bindings.
> ---
> .../bindings/pinctrl/cypress,cy8c95x0.yaml | 131 ++++++++++++++++++
> 1 file changed, 131 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/pinctrl/cypress,cy8c95x0.yaml
>
> diff --git a/Documentation/devicetree/bindings/pinctrl/cypress,cy8c95x0.yaml b/Documentation/devicetree/bindings/pinctrl/cypress,cy8c95x0.yaml
> new file mode 100644
> index 000000000000..765e8834d9dd
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pinctrl/cypress,cy8c95x0.yaml
> @@ -0,0 +1,131 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/pinctrl/cypress,cy8c95x0.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Cypress CY8C95X0 I2C GPIO expander
> +
> +maintainers:
> + - Patrick Rudolph <patrick.rudolph@...ements.com>
> +
> +description: |
> + This supports the 20/40/60 pin Cypress CYC95x0 GPIO I2C expanders.
> + Pin function configuration is performed on a per-pin basis.
> +
> +properties:
> + compatible:
> + enum:
> + - cypress,cy8c9520
> + - cypress,cy8c9540
> + - cypress,cy8c9560
> +
> + reg:
> + maxItems: 1
> +
> + gpio-controller: true
> +
> + '#gpio-cells':
> + description:
> + The first cell is the GPIO number and the second cell specifies GPIO
> + flags, as defined in <dt-bindings/gpio/gpio.h>.
> + const: 2
> +
> + interrupts:
> + maxItems: 1
> +
> + interrupt-controller: true
> +
> + '#interrupt-cells':
> + const: 2
> +
> + gpio-line-names: true
> +
> + gpio-ranges:
> + maxItems: 1
> +
> + gpio-reserved-ranges:
> + maxItems: 1
> +
> + vdd-supply:
> + description:
> + Optional power supply.
> +
> +patternProperties:
> + '-pins$':
> + type: object
> + description:
> + Pinctrl node's client devices use subnodes for desired pin configuration.
> + Client device subnodes use below standard properties.
> + $ref: "/schemas/pinctrl/pincfg-node.yaml"
Skip quotes.
> +
> + properties:
> + pins:
> + description:
> + List of gpio pins affected by the properties specified in this
> + subnode.
> + items:
> + - pattern: "^gp([0-7][0-7])$"
Use the same type of quotes everywhere - either ' or ". Does it actually
work? It looks like you allow here only one pin but the description
suggests it is a list of pins. I think you wanted here just "pattern:
..." without leading minus. Then you need also min and maxItems.
Why blank line here disappeared? My comment was in different place.
> + function:
> + description:
> + Specify the alternative function to be configured for the specified
> + pins.
> + enum: [ gpio, pwm ]
> +
> + bias-pull-down: true
> +
> + bias-pull-up: true
> +
> + bias-disable: true
> +
> + output-high: true
> +
> + output-low: true
> +
> + drive-push-pull: true
> +
> + drive-open-drain: true
> +
> + drive-open-source: true
> +
> + required:
> + - pins
> + - function
> +
> + additionalProperties: false
> +
> +required:
> + - compatible
> + - reg
> + - interrupts
> + - interrupt-controller
> + - '#interrupt-cells'
> + - gpio-controller
> + - '#gpio-cells'
> +
> +additionalProperties: false
> +
> +allOf:
> + - $ref: "pinctrl.yaml#"
> +
> +examples:
> + - |
> + #include <dt-bindings/interrupt-controller/arm-gic.h>
> + #include <dt-bindings/interrupt-controller/irq.h>
> +
> + i2c0 {
Just "i2c".
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + pinctrl@20 {
> + compatible = "cypress,cy8c9520";
> + reg = <0x20>;
> + gpio-controller;
> + #gpio-cells = <2>;
> + #interrupt-cells = <2>;
> + interrupts = <GIC_SPI 94 IRQ_TYPE_LEVEL_HIGH>;
> + interrupt-controller;
> + vdd-supply = <&p3v3>;
> + gpio-reserved-ranges = <5 1>;
> + };
> + };
Best regards,
Krzysztof
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