From: Rob Herring <robh@kernel.org>
To: Sander Vanheule <sander@svanheule.net>
Cc: Pavel Machek <pavel@ucw.cz>, Lee Jones <lee.jones@linaro.org>,
Linus Walleij <linus.walleij@linaro.org>,
linux-leds@vger.kernel.org, devicetree@vger.kernel.org,
linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/5] dt-bindings: mfd: Binding for RTL8231
Date: Mon, 17 May 2021 17:38:01 -0500 [thread overview]
Message-ID: <20210517223801.GA3327704@robh.at.kernel.org> (raw)
In-Reply-To: <73e017d08117cee1290b9483c23f79f956f41a6d.1620735871.git.sander@svanheule.net>
On Tue, May 11, 2021 at 02:25:20PM +0200, Sander Vanheule wrote:
> Add a binding description for the Realtek RTL8231, a GPIO and LED
> expander chip commonly used in ethernet switches based on a Realtek
> switch SoC. These chips can be addressed via an MDIO or SMI bus, or used
> as a plain 36-bit shift register.
>
> This binding only describes the feature set provided by the MDIO/SMI
> configuration, and covers the GPIO, PWM, and pin control properties. The
> LED properties are defined in a separate binding.
>
> Signed-off-by: Sander Vanheule <sander@svanheule.net>
> ---
> .../bindings/mfd/realtek,rtl8231.yaml | 202 ++++++++++++++++++
> 1 file changed, 202 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/mfd/realtek,rtl8231.yaml
>
> diff --git a/Documentation/devicetree/bindings/mfd/realtek,rtl8231.yaml b/Documentation/devicetree/bindings/mfd/realtek,rtl8231.yaml
> new file mode 100644
> index 000000000000..2023cfa887a3
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/realtek,rtl8231.yaml
> @@ -0,0 +1,202 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mfd/realtek,rtl8231.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Realtek RTL8231 GPIO and LED expander.
> +
> +maintainers:
> + - Sander Vanheule <sander@svanheule.net>
> +
> +description: |
> + The RTL8231 is a GPIO and LED expander chip, providing up to 37 GPIOs, up to
> + 88 LEDs, and up to one PWM output. This device is frequently used alongside
> + Realtek switch SoCs, to provide additional I/O capabilities.
> +
> + To manage the RTL8231's features, its strapping pins can be used to configure
> + it in one of three modes: shift register, MDIO device, or SMI device. The
> + shift register mode does not need special support. In MDIO or SMI mode, most
> + pins can be configured as a GPIO output, LED matrix scan line/column, or as a
> + PWM output.
> +
> + The GPIO and pin control are part of the main node. PWM and LED support are
> + configured as sub-nodes.
> +
> +properties:
> + compatible:
> + const: realtek,rtl8231
> +
> + reg:
> + description: MDIO or SMI device address.
> + maxItems: 1
> +
> + # GPIO support
> + gpio-controller: true
> +
> + "#gpio-cells":
> + const: 2
> + description: |
> + The first cell is the pin number and the second cell is used to specify
> + the gpio active state.
> +
> + gpio-ranges:
> + description: |
> + Must reference itself, and provide a zero-based mapping for 37 pins.
> + maxItems: 1
> +
> + # Pin muxing and configuration
> + realtek,drive-strength:
> + $ref: /schemas/types.yaml#/definitions/uint32
Use the standard 'drive-strength' property.
> + description: |
> + Common drive strength used for all GPIO output pins, must be 4mA or 8mA.
> + On reset, this value will default to 8mA.
> + enum: [4, 8]
> +
> + # LED scanning matrix
> + leds:
> + $ref: ../leds/realtek,rtl8231-leds.yaml#
> +
> + # PWM output
> + pwm:
> + type: object
> + description: |
> + Subnode describing the PWM peripheral. To use the PWM output, gpio35 must
> + be muxed to its 'pwm' function. Valid frequency values for consumers are
> + 1200, 1600, 2000, 2400, 2800, 3200, 4000, and 4800.
> +
> + properties:
> + "#pwm-cells":
> + description: |
> + Twos cells with PWM index (must be 0) and PWM frequency in Hz.
> + const: 2
> +
> + required:
> + - "#pwm-cells"
Just move this to the parent node. No reason for a child node or that 1
node can't be 2 providers.
> +
> +patternProperties:
> + "-pins$":
> + type: object
> + $ref: ../pinctrl/pinmux-node.yaml#
> +
> + properties:
> + pins:
> + items:
> + oneOf:
No need for oneOf when there's only 1 entry.
> + - enum: ["gpio0", "gpio1", "gpio2", "gpio3", "gpio4", "gpio5", "gpio6",
> + "gpio7", "gpio8", "gpio9", "gpio10", "gpio11", "gpio12", "gpio13",
> + "gpio14", "gpio15", "gpio16", "gpio17", "gpio18", "gpio19", "gpio20",
> + "gpio21", "gpio22", "gpio23", "gpio24", "gpio25", "gpio26", "gpio27",
> + "gpio28", "gpio29", "gpio30", "gpio31", "gpio32", "gpio33", "gpio34",
> + "gpio35", "gpio36"]
> + minItems: 1
> + maxItems: 37
> + function:
> + description: |
> + Select which function to use. "gpio" is supported for all pins, "led" is supported
> + for pins 0-34, "pwm" is supported for for pin 35.
> + enum: ["gpio", "led", "pwm"]
> +
> + required:
> + - pins
> + - function
> +
> +required:
> + - compatible
> + - reg
> + - gpio-controller
> + - "#gpio-cells"
> + - gpio-ranges
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + // Minimal example
> + mdio {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + expander0: expander@0 {
> + compatible = "realtek,rtl8231";
> + reg = <0>;
> +
> + gpio-controller;
> + #gpio-cells = <2>;
> + gpio-ranges = <&expander0 0 0 37>;
> + };
> + };
> + - |
> + // All bells and whistles included
> + #include <dt-bindings/leds/common.h>
> + mdio {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + expander1: expander@1 {
> + compatible = "realtek,rtl8231";
> + reg = <1>;
> +
> + gpio-controller;
> + #gpio-cells = <2>;
> + gpio-ranges = <&expander1 0 0 37>;
> +
> + realtek,drive-strength = <4>;
> +
> + button-pins {
> + pins = "gpio36";
> + function = "gpio";
> + input-debounce = "100000";
> + };
> +
> + pwm-pins {
> + pins = "gpio35";
> + function = "pwm";
> + };
> +
> + led-pins {
> + pins = "gpio0", "gpio1", "gpio3", "gpio4";
> + function = "led";
> + };
> +
> + pwm {
> + #pwm-cells = <2>;
> + };
> +
> + leds {
> + compatible = "realtek,rtl8231-leds";
> + #address-cells = <2>;
> + #size-cells = <0>;
> +
> + realtek,led-scan-mode = "single-color";
> +
> + led@0,0 {
> + reg = <0 0>;
> + color = <LED_COLOR_ID_GREEN>;
> + function = LED_FUNCTION_LAN;
> + function-enumerator = <0>;
> + };
> +
> + led@0,1 {
> + reg = <0 1>;
> + color = <LED_COLOR_ID_AMBER>;
> + function = LED_FUNCTION_LAN;
> + function-enumerator = <0>;
> + };
> +
> + led@1,0 {
> + reg = <1 0>;
> + color = <LED_COLOR_ID_GREEN>;
> + function = LED_FUNCTION_LAN;
> + function-enumerator = <1>;
> + };
> +
> + led@1,1 {
> + reg = <1 1>;
> + color = <LED_COLOR_ID_AMBER>;
> + function = LED_FUNCTION_LAN;
> + function-enumerator = <1>;
> + };
> + };
> + };
> + };
> --
> 2.31.1
>
next prev parent reply other threads:[~2021-05-17 22:38 UTC|newest]
Thread overview: 116+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-11 12:25 [PATCH 0/5] RTL8231 GPIO expander support Sander Vanheule
2021-05-11 12:25 ` [PATCH 1/5] dt-bindings: leds: Binding for RTL8231 scan matrix Sander Vanheule
2021-05-17 22:31 ` Rob Herring
2021-05-19 16:39 ` Sander Vanheule
2021-05-11 12:25 ` [PATCH 2/5] dt-bindings: mfd: Binding for RTL8231 Sander Vanheule
2021-05-17 22:38 ` Rob Herring [this message]
2021-05-19 16:53 ` Sander Vanheule
2021-05-11 12:25 ` [PATCH 3/5] mfd: Add RTL8231 core device Sander Vanheule
2021-05-12 12:29 ` kernel test robot
2021-05-12 13:13 ` kernel test robot
2021-05-19 14:58 ` Lee Jones
2021-05-19 15:11 ` Sander Vanheule
2021-05-11 12:25 ` [PATCH 4/5] pinctrl: Add RTL8231 pin control and GPIO support Sander Vanheule
2021-05-11 12:25 ` [PATCH 5/5] leds: Add support for RTL8231 LED scan matrix Sander Vanheule
[not found] ` <CAHp75VffoKyyPJbdtKMLx575c9LT0S8+EHOk7Mw36j=aTL6Q4Q@mail.gmail.com>
2021-05-16 21:40 ` [PATCH 0/5] RTL8231 GPIO expander support Sander Vanheule
2021-05-17 8:13 ` Andy Shevchenko
2021-05-17 8:50 ` Sander Vanheule
2021-05-17 19:32 ` Sander Vanheule
2021-05-17 19:28 ` [PATCH v2 0/7] " Sander Vanheule
2021-05-17 19:28 ` [PATCH v2 1/7] regmap: Add MDIO bus support Sander Vanheule
2021-05-19 16:12 ` Mark Brown
2021-05-17 19:28 ` [PATCH v2 2/7] gpio: regmap: Add configurable dir/value order Sander Vanheule
2021-05-17 21:06 ` Andy Shevchenko
2021-05-18 1:40 ` Andrew Lunn
2021-05-18 11:39 ` Sander Vanheule
2021-05-23 22:21 ` Sander Vanheule
2021-05-18 8:39 ` Michael Walle
2021-05-18 10:39 ` Andy Shevchenko
2021-05-23 21:19 ` Sander Vanheule
2021-05-17 19:28 ` [PATCH v2 3/7] dt-bindings: leds: Binding for RTL8231 scan matrix Sander Vanheule
2021-05-17 19:28 ` [PATCH v2 4/7] dt-bindings: mfd: Binding for RTL8231 Sander Vanheule
2021-05-18 22:02 ` Linus Walleij
2021-05-17 19:28 ` [PATCH v2 5/7] mfd: Add RTL8231 core device Sander Vanheule
2021-05-17 21:18 ` Andy Shevchenko
2021-05-23 21:28 ` Sander Vanheule
2021-05-24 7:49 ` Andy Shevchenko
2021-05-24 7:50 ` Sander Vanheule
2021-05-24 7:55 ` Andy Shevchenko
2021-05-24 8:04 ` Sander Vanheule
2021-05-17 19:28 ` [PATCH v2 6/7] pinctrl: Add RTL8231 pin control and GPIO support Sander Vanheule
2021-05-17 21:42 ` Andy Shevchenko
2021-05-17 21:46 ` Andy Shevchenko
2021-05-23 21:42 ` Sander Vanheule
2021-05-17 19:28 ` [PATCH v2 7/7] leds: Add support for RTL8231 LED scan matrix Sander Vanheule
2021-05-17 22:00 ` Andy Shevchenko
2021-05-23 21:53 ` Sander Vanheule
2021-05-19 16:10 ` (subset) [PATCH v2 0/7] RTL8231 GPIO expander support Mark Brown
2021-05-23 22:33 ` [PATCH v3 0/6] " Sander Vanheule
2021-05-23 22:33 ` [PATCH v3 1/6] gpio: regmap: Add quirk for output data register Sander Vanheule
2021-05-28 6:40 ` Michael Walle
2021-06-03 10:03 ` Sander Vanheule
2021-05-31 7:25 ` Bartosz Golaszewski
2021-05-23 22:34 ` [PATCH v3 2/6] dt-bindings: leds: Binding for RTL8231 scan matrix Sander Vanheule
2021-06-02 18:58 ` Rob Herring
2021-05-23 22:34 ` [PATCH v3 3/6] dt-bindings: mfd: Binding for RTL8231 Sander Vanheule
2021-05-27 23:31 ` Linus Walleij
2021-06-02 19:02 ` Rob Herring
2021-05-23 22:34 ` [PATCH v3 4/6] mfd: Add RTL8231 core device Sander Vanheule
2021-05-24 8:02 ` Andy Shevchenko
2021-05-24 8:23 ` Sander Vanheule
2021-05-24 10:18 ` Andy Shevchenko
2021-05-24 11:41 ` Sander Vanheule
2021-05-23 22:34 ` [PATCH v3 5/6] pinctrl: Add RTL8231 pin control and GPIO support Sander Vanheule
2021-05-28 6:29 ` Michael Walle
2021-05-28 6:42 ` Sander Vanheule
2021-05-28 6:43 ` Michael Walle
2021-05-23 22:34 ` [PATCH v3 6/6] leds: Add support for RTL8231 LED scan matrix Sander Vanheule
2021-05-24 10:24 ` Andy Shevchenko
2021-05-24 12:04 ` Sander Vanheule
2021-05-24 12:47 ` Andy Shevchenko
2021-05-24 15:30 ` Sander Vanheule
2021-05-24 1:10 ` [PATCH v3 0/6] RTL8231 GPIO expander support Andrew Lunn
2021-05-24 7:53 ` Andy Shevchenko
2021-05-24 11:41 ` Sander Vanheule
2021-05-24 12:54 ` Andy Shevchenko
2021-05-24 15:03 ` Sander Vanheule
2021-05-24 16:30 ` Andy Shevchenko
2021-05-25 17:11 ` Andy Shevchenko
2021-05-25 18:00 ` Sander Vanheule
2021-05-26 21:02 ` Sander Vanheule
2021-05-27 10:38 ` Andy Shevchenko
2021-05-27 10:41 ` Hans de Goede
2021-05-24 15:20 ` Sander Vanheule
2021-05-28 6:37 ` Michael Walle
2021-05-30 16:19 ` Sander Vanheule
2021-05-30 16:51 ` Hans de Goede
2021-05-30 18:16 ` Andy Shevchenko
2021-05-30 21:22 ` Michael Walle
2021-05-31 8:36 ` Sander Vanheule
2021-05-31 10:02 ` Michael Walle
[not found] ` <CAHp75VfOrUBRQH1vrXEwHN4ZPojQfQju-_wp_3djZeozEaatug@mail.gmail.com>
2021-05-31 15:33 ` [PATCH 0/5] " Sander Vanheule
2021-05-31 15:48 ` Andy Shevchenko
2021-06-01 11:49 ` Michael Walle
2021-06-01 15:24 ` Andy Shevchenko
2021-06-02 20:20 ` Sander Vanheule
2021-06-01 9:59 ` [PATCH v3 0/6] " Linus Walleij
2021-06-01 10:18 ` Michael Walle
2021-06-01 10:51 ` Linus Walleij
2021-06-01 11:41 ` Michael Walle
2021-06-01 11:48 ` Linus Walleij
2021-06-03 10:00 ` [PATCH v4 0/5] " Sander Vanheule
2021-06-03 10:00 ` [PATCH v4 1/5] dt-bindings: leds: Binding for RTL8231 scan matrix Sander Vanheule
2021-06-03 10:00 ` [PATCH v4 2/5] dt-bindings: mfd: Binding for RTL8231 Sander Vanheule
2021-06-03 10:00 ` [PATCH v4 3/5] mfd: Add RTL8231 core device Sander Vanheule
2021-06-03 10:58 ` Andy Shevchenko
2021-06-03 11:28 ` Sander Vanheule
2021-06-03 14:03 ` Andrew Lunn
2021-06-03 15:20 ` Sander Vanheule
2021-06-05 11:07 ` Sander Vanheule
2021-06-03 10:00 ` [PATCH v4 4/5] pinctrl: Add RTL8231 pin control and GPIO support Sander Vanheule
2021-06-03 10:18 ` Andy Shevchenko
2021-06-03 15:58 ` kernel test robot
2021-06-04 7:00 ` Sander Vanheule
2021-06-04 22:10 ` Linus Walleij
2021-06-03 10:00 ` [PATCH v4 5/5] leds: Add support for RTL8231 LED scan matrix Sander Vanheule
2021-06-03 11:01 ` Andy Shevchenko
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