Merge tag 'linux-watchdog-6.3-rc1' of git://www.linux-watchdog.org/linux-watchdog (a9a01e12) · Commits · EulixOS / Software / Kernel

Documentation/ABI/testing/sysfs-class-watchdog

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		@@ -6,6 +6,19 @@ Description:
		device at boot. It is equivalent to WDIOC_GETBOOTSTATUS of
		ioctl interface.

		What: /sys/class/watchdog/watchdogn/options
		Date: April 2023
		Contact: Thomas Weißschuh
		Description:
		It is a read only file. It contains options of watchdog device.

		What: /sys/class/watchdog/watchdogn/fw_version
		Date: April 2023
		Contact: Thomas Weißschuh
		Description:
		It is a read only file. It contains firmware version of
		watchdog device.

		What: /sys/class/watchdog/watchdogn/identity
		Date: August 2015
		Contact: Wim Van Sebroeck <wim@iguana.be>

deleted100644 → 0

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		* MSM Timer

		Properties:

		- compatible : Should at least contain "qcom,msm-timer". More specific
		properties specify which subsystem the timers are paired with.

		"qcom,kpss-timer" - krait subsystem
		"qcom,scss-timer" - scorpion subsystem

		- interrupts : Interrupts for the debug timer, the first general purpose
		timer, and optionally a second general purpose timer, and
		optionally as well, 2 watchdog interrupts, in that order.

		- reg : Specifies the base address of the timer registers.

		- clocks: Reference to the parent clocks, one per output clock. The parents
		must appear in the same order as the clock names.

		- clock-names: The name of the clocks as free-form strings. They should be in
		the same order as the clocks.

		- clock-frequency : The frequency of the debug timer and the general purpose
		timer(s) in Hz in that order.

		Optional:

		- cpu-offset : per-cpu offset used when the timer is accessed without the
		CPU remapping facilities. The offset is
		cpu-offset + (0x10000 * cpu-nr).

		Example:

		timer@200a000 {
		compatible = "qcom,scss-timer", "qcom,msm-timer";
		interrupts = <1 1 0x301>,
		<1 2 0x301>,
		<1 3 0x301>,
		<1 4 0x301>,
		<1 5 0x301>;
		reg = <0x0200a000 0x100>;
		clock-frequency = <19200000>,
		<32768>;
		clocks = <&sleep_clk>;
		clock-names = "sleep";
		cpu-offset = <0x40000>;
		};

0 → 100644

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		# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
		%YAML 1.2
		---
		$id: http://devicetree.org/schemas/watchdog/amlogic,meson6-wdt.yaml#
		$schema: http://devicetree.org/meta-schemas/core.yaml#

		title: Amlogic Meson6 SoCs Watchdog timer

		maintainers:
		- Neil Armstrong <neil.armstrong@linaro.org>
		- Martin Blumenstingl <martin.blumenstingl@googlemail.com>

		allOf:
		- $ref: watchdog.yaml#

		properties:
		compatible:
		oneOf:
		- enum:
		- amlogic,meson6-wdt
		- amlogic,meson8-wdt
		- amlogic,meson8b-wdt
		- items:
		- const: amlogic,meson8m2-wdt
		- const: amlogic,meson8b-wdt

		interrupts:
		maxItems: 1

		reg:
		maxItems: 1

		required:
		- compatible
		- interrupts
		- reg

		unevaluatedProperties: false

		examples:
		- \|
		#include <dt-bindings/interrupt-controller/irq.h>
		#include <dt-bindings/interrupt-controller/arm-gic.h>

		wdt: watchdog@c1109900 {
		compatible = "amlogic,meson6-wdt";
		reg = <0xc1109900 0x8>;
		interrupts = <GIC_SPI 0 IRQ_TYPE_EDGE_RISING>;
		timeout-sec = <10>;
		};

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		@@ -9,9 +9,6 @@ title: Freescale i.MX Watchdog Timer (WDT) Controller
		maintainers:
		- Anson Huang <Anson.Huang@nxp.com>

		allOf:
		- $ref: "watchdog.yaml#"

		properties:
		compatible:
		oneOf:
		@@ -55,11 +52,45 @@ properties:
		If present, the watchdog device is configured to assert its
		external reset (WDOG_B) instead of issuing a software reset.

		fsl,suspend-in-wait:
		$ref: /schemas/types.yaml#/definitions/flag
		description: \|
		If present, the watchdog device is suspended in WAIT mode
		(Suspend-to-Idle). Only supported on certain devices.

		required:
		- compatible
		- interrupts
		- reg

		allOf:
		- $ref: watchdog.yaml#
		- if:
		not:
		properties:
		compatible:
		contains:
		enum:
		- fsl,imx25-wdt
		- fsl,imx35-wdt
		- fsl,imx50-wdt
		- fsl,imx51-wdt
		- fsl,imx53-wdt
		- fsl,imx6q-wdt
		- fsl,imx6sl-wdt
		- fsl,imx6sll-wdt
		- fsl,imx6sx-wdt
		- fsl,imx6ul-wdt
		- fsl,imx7d-wdt
		- fsl,imx8mm-wdt
		- fsl,imx8mn-wdt
		- fsl,imx8mp-wdt
		- fsl,imx8mq-wdt
		- fsl,vf610-wdt
		then:
		properties:
		fsl,suspend-in-wait: false

		unevaluatedProperties: false

		examples:

0 → 100644

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		# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
		%YAML 1.2
		---
		$id: http://devicetree.org/schemas/watchdog/gpio-wdt.yaml#
		$schema: http://devicetree.org/meta-schemas/core.yaml#

		title: GPIO controlled watchdog

		maintainers:
		- Robert Marko <robert.marko@sartura.hr>

		properties:
		compatible:
		const: linux,wdt-gpio

		gpios:
		maxItems: 1
		description: GPIO connected to the WDT reset pin

		hw_algo:
		$ref: /schemas/types.yaml#/definitions/string
		description: Algorithm used by the driver
		oneOf:
		- description:
		Either a high-to-low or a low-to-high transition clears the WDT counter.
		The watchdog timer is disabled when GPIO is left floating or connected
		to a three-state buffer.
		const: toggle
		- description:
		Low or high level starts counting WDT timeout, the opposite level
		disables the WDT.
		Active level is determined by the GPIO flags.
		const: level

		hw_margin_ms:
		$ref: /schemas/types.yaml#/definitions/uint32
		description: Maximum time to reset watchdog circuit (in milliseconds)
		minimum: 2
		maximum: 65535

		always-running:
		type: boolean
		description:
		If the watchdog timer cannot be disabled, add this flag to have the driver
		keep toggling the signal without a client.
		It will only cease to toggle the signal when the device is open and the
		timeout elapsed.

		required:
		- compatible
		- gpios
		- hw_algo
		- hw_margin_ms

		unevaluatedProperties: false