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Date: Tue, 21 May 2024 21:05:50 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Laurent Pinchart <laurent.pinchart@...asonboard.com>,
linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
linux-gpio@...r.kernel.org, linux-pwm@...r.kernel.org
Cc: Alexandru Ardelean <alexandru.ardelean@...log.com>,
Bartosz Golaszewski <brgl@...ev.pl>, Conor Dooley <conor+dt@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>, Lee Jones <lee@...nel.org>,
Linus Walleij <linus.walleij@...aro.org>, Rob Herring <robh@...nel.org>,
Uwe Kleine-König <ukleinek@...nel.org>
Subject: Re: [PATCH 2/5] dt-bindings: Add bindings for the Analog Devices
ADP5585
On 20/05/2024 21:59, Laurent Pinchart wrote:
> The ADP5585 is a 10/11 input/output port expander with a built in keypad
> matrix decoder, programmable logic, reset generator, and PWM generator.
> These bindings model the device as an MFD, and support the GPIO expander
> and PWM functions.
>
> These bindings support the GPIO and PWM functions.
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> ---
> I've limited the bindings to GPIO and PWM as I lack hardware to design,
> implement and test the rest of the features the chip supports.
> ---
> .../bindings/gpio/adi,adp5585-gpio.yaml | 36 ++++++
> .../devicetree/bindings/mfd/adi,adp5585.yaml | 117 ++++++++++++++++++
> .../bindings/pwm/adi,adp5585-pwm.yaml | 35 ++++++
> MAINTAINERS | 7 ++
> 4 files changed, 195 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/gpio/adi,adp5585-gpio.yaml
> create mode 100644 Documentation/devicetree/bindings/mfd/adi,adp5585.yaml
> create mode 100644 Documentation/devicetree/bindings/pwm/adi,adp5585-pwm.yaml
>
> diff --git a/Documentation/devicetree/bindings/gpio/adi,adp5585-gpio.yaml b/Documentation/devicetree/bindings/gpio/adi,adp5585-gpio.yaml
> new file mode 100644
> index 000000000000..210e4d53e764
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/gpio/adi,adp5585-gpio.yaml
> @@ -0,0 +1,36 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/gpio/adi,adp5585-gpio.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Analog Devices ADP5585 GPIO Expander
> +
> +maintainers:
> + - Laurent Pinchart <laurent.pinchart@...asonboard.com>
> +
> +description: |
> + The Analog Devices ADP5585 has up to 11 GPIOs represented by a "gpio" child
> + node of the parent MFD device. See
> + Documentation/devicetree/bindings/mfd/adi,adp5585.yaml for further details as
> + well as an example.
> +
> +properties:
> + compatible:
> + const: adi,adp5585-gpio
> +
> + gpio-controller: true
> +
> + '#gpio-cells':
> + const: 2
> +
> + gpio-reserved-ranges: true
There are no resources here, so new compatible is not really warranted.
Squash the node into parent.
> +
> +required:
> + - compatible
> + - gpio-controller
> + - "#gpio-cells"
> +
> +additionalProperties: false
> +
> +...
> diff --git a/Documentation/devicetree/bindings/mfd/adi,adp5585.yaml b/Documentation/devicetree/bindings/mfd/adi,adp5585.yaml
> new file mode 100644
> index 000000000000..217c038b2842
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/adi,adp5585.yaml
> @@ -0,0 +1,117 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mfd/adi,adp5585.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Analog Devices ADP5585 Keypad Decoder and I/O Expansion
> +
> +maintainers:
> + - Laurent Pinchart <laurent.pinchart@...asonboard.com>
> +
> +description: |
Do not need '|' unless you need to preserve formatting.
> + The ADP5585 is a 10/11 input/output port expander with a built in keypad
> + matrix decoder, programmable logic, reset generator, and PWM generator.
> +
> +properties:
> + compatible:
> + items:
> + - enum:
> + - adi,adp5585-00 # Default
> + - adi,adp5585-01 # 11 GPIOs
> + - adi,adp5585-02 # No pull-up resistors by default on special pins
> + - adi,adp5585-03 # Alternate I2C address
> + - adi,adp5585-04 # Pull-down resistors on all pins by default
> + - const: adi,adp5585
> +
> + reg:
> + maxItems: 1
> +
> + interrupts:
> + maxItems: 1
> +
> + vdd-supply: true
> +
> + gpio:
> + $ref: /schemas/gpio/adi,adp5585-gpio.yaml
> +
> + pwm:
> + $ref: /schemas/pwm/adi,adp5585-pwm.yaml
> +
> +required:
> + - compatible
> + - reg
> + - gpio
> + - pwm
> +
> +allOf:
> + - if:
> + properties:
> + compatible:
> + contains:
> + const: adi,adp5585-01
> + then:
> + properties:
> + gpio:
> + properties:
> + gpio-reserved-ranges: false
This also points to fact your child node is pointless. It does not stand
on its own...
> + else:
> + properties:
> + gpio:
> + properties:
> + gpio-reserved-ranges:
> + items:
> + - const: 5
> + - const: 1
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + i2c {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + mfd@34 {
> + compatible = "adi,adp5585-00", "adi,adp5585";
> + reg = <0x34>;
> +
> + gpio {
> + compatible = "adi,adp5585-gpio";
> + gpio-controller;
> + #gpio-cells = <2>;
> + gpio-reserved-ranges = <5 1>;
> + };
> +
> + pwm {
> + compatible = "adi,adp5585-pwm";
> + #pwm-cells = <3>;
> + };
> + };
> + };
> +
> + - |
> + i2c {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + mfd@34 {
> + compatible = "adi,adp5585-01", "adi,adp5585";
> + reg = <0x34>;
> +
> + vdd-supply = <®_3v3>;
> +
> + gpio {
> + compatible = "adi,adp5585-gpio";
> + gpio-controller;
> + #gpio-cells = <2>;
Different by one property? So just keep one example, unless there are
more differences.
> + };
> +
> + pwm {
> + compatible = "adi,adp5585-pwm";
> + #pwm-cells = <3>;
> + };
> + };
> + };
> +
> +...
> diff --git a/Documentation/devicetree/bindings/pwm/adi,adp5585-pwm.yaml b/Documentation/devicetree/bindings/pwm/adi,adp5585-pwm.yaml
> new file mode 100644
> index 000000000000..351a9d5da566
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pwm/adi,adp5585-pwm.yaml
> @@ -0,0 +1,35 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/pwm/adi,adp5585-pwm.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Analog Devices ADP5585 PWM Generator
> +
> +maintainers:
> + - Laurent Pinchart <laurent.pinchart@...asonboard.com>
> +
> +description: |
Do not need '|' unless you need to preserve formatting.
> + The Analog Devices ADP5585 generates a PWM output with configurable frequency
> + and duty cycle represented by a "pwm" child node of the parent MFD device.
> + See Documentation/devicetree/bindings/mfd/adi,adp5585.yaml for further
> + details as well as an example.
> +
> +allOf:
> + - $ref: /schemas/pwm/pwm.yaml#
> +
> +properties:
> + compatible:
> + enum:
> + - adi,adp5585-pwm
> +
> + "#pwm-cells":
> + const: 3
Also no resources, so this can be part of the parent node.
Best regards,
Krzysztof
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