dt-bindings: mfd: Add bindings for sl28cpld
Add a device tree bindings for the board management controller found on the Kontron SMARC-sAL28 board. Signed-off-by: Michael Walle <michael@walle.cc> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Michael Walle
Lee Jones
parent
3abee45794
commit
48e28a249e
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/gpio/kontron,sl28cpld-gpio.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: GPIO driver for the sl28cpld board management controller
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maintainers:
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- Michael Walle <michael@walle.cc>
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description: |
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This module is part of the sl28cpld multi-function device. For more
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details see ../mfd/kontron,sl28cpld.yaml.
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There are three flavors of the GPIO controller, one full featured
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input/output with interrupt support (kontron,sl28cpld-gpio), one
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output-only (kontron,sl28-gpo) and one input-only (kontron,sl28-gpi).
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Each controller supports 8 GPIO lines.
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properties:
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compatible:
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enum:
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- kontron,sl28cpld-gpio
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- kontron,sl28cpld-gpi
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- kontron,sl28cpld-gpo
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reg:
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maxItems: 1
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interrupts:
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maxItems: 1
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"#interrupt-cells":
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const: 2
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interrupt-controller: true
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"#gpio-cells":
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const: 2
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gpio-controller: true
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gpio-line-names:
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minItems: 1
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maxItems: 8
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required:
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- compatible
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- "#gpio-cells"
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- gpio-controller
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additionalProperties: false
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/hwmon/kontron,sl28cpld-hwmon.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Hardware monitoring driver for the sl28cpld board management controller
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maintainers:
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- Michael Walle <michael@walle.cc>
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description: |
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This module is part of the sl28cpld multi-function device. For more
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details see ../mfd/kontron,sl28cpld.yaml.
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properties:
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compatible:
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enum:
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- kontron,sl28cpld-fan
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reg:
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maxItems: 1
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required:
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- compatible
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additionalProperties: false
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/interrupt-controller/kontron,sl28cpld-intc.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Interrupt controller driver for the sl28cpld board management controller
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maintainers:
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- Michael Walle <michael@walle.cc>
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description: |
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This module is part of the sl28cpld multi-function device. For more
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details see ../mfd/kontron,sl28cpld.yaml.
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The following interrupts are available. All types and levels are fixed
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and handled by the board management controller.
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==== ============= ==================================
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IRQ line/device description
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==== ============= ==================================
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0 RTC_INT# Interrupt line from on-board RTC
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1 SMB_ALERT# Event on SMB_ALERT# line (P1)
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2 ESPI_ALERT0# Event on ESPI_ALERT0# line (S43)
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3 ESPI_ALERT1# Event on ESPI_ALERT1# line (S44)
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4 PWR_BTN# Event on PWR_BTN# line (P128)
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5 SLEEP# Event on SLEEP# line (S149)
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6 watchdog Interrupt of the internal watchdog
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7 n/a not used
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==== ============= ==================================
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properties:
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compatible:
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enum:
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- kontron,sl28cpld-intc
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reg:
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maxItems: 1
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interrupts:
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maxItems: 1
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"#interrupt-cells":
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const: 2
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interrupt-controller: true
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required:
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- compatible
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- interrupts
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- "#interrupt-cells"
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- interrupt-controller
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additionalProperties: false
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153
Documentation/devicetree/bindings/mfd/kontron,sl28cpld.yaml
Normal file
153
Documentation/devicetree/bindings/mfd/kontron,sl28cpld.yaml
Normal file
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/mfd/kontron,sl28cpld.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Kontron's sl28cpld board management controller
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maintainers:
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- Michael Walle <michael@walle.cc>
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description: |
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The board management controller may contain different IP blocks like
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watchdog, fan monitoring, PWM controller, interrupt controller and a
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GPIO controller.
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properties:
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compatible:
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const: kontron,sl28cpld
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reg:
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description:
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I2C device address.
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maxItems: 1
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"#address-cells":
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const: 1
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"#size-cells":
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const: 0
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"#interrupt-cells":
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const: 2
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interrupts:
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maxItems: 1
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interrupt-controller: true
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patternProperties:
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"^gpio(@[0-9a-f]+)?$":
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$ref: ../gpio/kontron,sl28cpld-gpio.yaml
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"^hwmon(@[0-9a-f]+)?$":
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$ref: ../hwmon/kontron,sl28cpld-hwmon.yaml
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"^interrupt-controller(@[0-9a-f]+)?$":
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$ref: ../interrupt-controller/kontron,sl28cpld-intc.yaml
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"^pwm(@[0-9a-f]+)?$":
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$ref: ../pwm/kontron,sl28cpld-pwm.yaml
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"^watchdog(@[0-9a-f]+)?$":
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$ref: ../watchdog/kontron,sl28cpld-wdt.yaml
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required:
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- "#address-cells"
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- "#size-cells"
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- compatible
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- reg
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/interrupt-controller/irq.h>
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i2c {
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#address-cells = <1>;
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#size-cells = <0>;
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sl28cpld@4a {
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compatible = "kontron,sl28cpld";
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reg = <0x4a>;
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#address-cells = <1>;
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#size-cells = <0>;
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watchdog@4 {
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compatible = "kontron,sl28cpld-wdt";
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reg = <0x4>;
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kontron,assert-wdt-timeout-pin;
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};
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hwmon@b {
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compatible = "kontron,sl28cpld-fan";
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reg = <0xb>;
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};
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pwm@c {
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compatible = "kontron,sl28cpld-pwm";
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reg = <0xc>;
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#pwm-cells = <2>;
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};
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pwm@e {
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compatible = "kontron,sl28cpld-pwm";
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reg = <0xe>;
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#pwm-cells = <2>;
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};
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gpio@10 {
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compatible = "kontron,sl28cpld-gpio";
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reg = <0x10>;
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interrupts-extended = <&gpio2 6
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IRQ_TYPE_EDGE_FALLING>;
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gpio-controller;
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#gpio-cells = <2>;
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gpio-line-names = "a", "b", "c";
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interrupt-controller;
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#interrupt-cells = <2>;
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};
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gpio@15 {
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compatible = "kontron,sl28cpld-gpio";
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reg = <0x15>;
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interrupts-extended = <&gpio2 6
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IRQ_TYPE_EDGE_FALLING>;
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gpio-controller;
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#gpio-cells = <2>;
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interrupt-controller;
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#interrupt-cells = <2>;
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};
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gpio@1a {
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compatible = "kontron,sl28cpld-gpo";
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reg = <0x1a>;
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gpio-controller;
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#gpio-cells = <2>;
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};
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gpio@1b {
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compatible = "kontron,sl28cpld-gpi";
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reg = <0x1b>;
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gpio-controller;
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#gpio-cells = <2>;
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};
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interrupt-controller@1c {
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compatible = "kontron,sl28cpld-intc";
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reg = <0x1c>;
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interrupts-extended = <&gpio2 6
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IRQ_TYPE_EDGE_FALLING>;
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interrupt-controller;
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#interrupt-cells = <2>;
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};
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};
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};
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/pwm/kontron,sl28cpld-pwm.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: PWM driver for the sl28cpld board management controller
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maintainers:
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- Michael Walle <michael@walle.cc>
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description: |
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This module is part of the sl28cpld multi-function device. For more
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details see ../mfd/kontron,sl28cpld.yaml.
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The controller supports one PWM channel and supports only four distinct
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frequencies (250Hz, 500Hz, 1kHz, 2kHz).
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allOf:
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- $ref: pwm.yaml#
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properties:
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compatible:
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const: kontron,sl28cpld-pwm
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reg:
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maxItems: 1
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"#pwm-cells":
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const: 2
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required:
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- compatible
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additionalProperties: false
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/watchdog/kontron,sl28cpld-wdt.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Watchdog driver for the sl28cpld board management controller
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maintainers:
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- Michael Walle <michael@walle.cc>
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description: |
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This module is part of the sl28cpld multi-function device. For more
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details see ../mfd/kontron,sl28cpld.yaml.
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allOf:
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- $ref: watchdog.yaml#
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properties:
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compatible:
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const: kontron,sl28cpld-wdt
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reg:
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maxItems: 1
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kontron,assert-wdt-timeout-pin:
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description: The SMARC standard defines a WDT_TIME_OUT# pin. If this
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property is set, this output will be pulsed when the watchdog bites
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and the system resets.
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type: boolean
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required:
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- compatible
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additionalProperties: false
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