diff options
| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
| commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
| tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /Documentation/devicetree/bindings/watchdog | |
| parent | Initial commit. (diff) | |
| download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip | |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'Documentation/devicetree/bindings/watchdog')
66 files changed, 2880 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/watchdog/allwinner,sun4i-a10-wdt.yaml b/Documentation/devicetree/bindings/watchdog/allwinner,sun4i-a10-wdt.yaml new file mode 100644 index 000000000..026c2e5e7 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/allwinner,sun4i-a10-wdt.yaml @@ -0,0 +1,96 @@ +# SPDX-License-Identifier: GPL-2.0 +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/allwinner,sun4i-a10-wdt.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Allwinner A10 Watchdog + +allOf: + - $ref: "watchdog.yaml#" + +maintainers: + - Chen-Yu Tsai <wens@csie.org> + - Maxime Ripard <mripard@kernel.org> + +properties: + compatible: + oneOf: + - const: allwinner,sun4i-a10-wdt + - const: allwinner,sun6i-a31-wdt + - items: + - enum: + - allwinner,sun50i-a64-wdt + - allwinner,sun50i-a100-wdt + - allwinner,sun50i-h6-wdt + - allwinner,sun50i-h616-wdt + - allwinner,sun50i-r329-wdt + - allwinner,sun50i-r329-wdt-reset + - allwinner,suniv-f1c100s-wdt + - const: allwinner,sun6i-a31-wdt + - const: allwinner,sun20i-d1-wdt + - items: + - const: allwinner,sun20i-d1-wdt-reset + - const: allwinner,sun20i-d1-wdt + + reg: + maxItems: 1 + + clocks: + minItems: 1 + items: + - description: 32 KHz input clock + - description: secondary clock source + + interrupts: + maxItems: 1 + +required: + - compatible + - reg + - clocks + - interrupts + +if: + properties: + compatible: + contains: + enum: + - allwinner,sun20i-d1-wdt + - allwinner,sun20i-d1-wdt-reset + - allwinner,sun50i-r329-wdt + - allwinner,sun50i-r329-wdt-reset + +then: + properties: + clocks: + items: + - description: High-frequency oscillator input, divided internally + - description: Low-frequency oscillator input + + clock-names: + items: + - const: hosc + - const: losc + + required: + - clock-names + +else: + properties: + clocks: + maxItems: 1 + +unevaluatedProperties: false + +examples: + - | + wdt: watchdog@1c20c90 { + compatible = "allwinner,sun4i-a10-wdt"; + reg = <0x01c20c90 0x10>; + interrupts = <24>; + clocks = <&osc24M>; + timeout-sec = <10>; + }; + +... diff --git a/Documentation/devicetree/bindings/watchdog/alphascale-asm9260.txt b/Documentation/devicetree/bindings/watchdog/alphascale-asm9260.txt new file mode 100644 index 000000000..75b265a04 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/alphascale-asm9260.txt @@ -0,0 +1,35 @@ +Alphascale asm9260 Watchdog timer + +Required properties: + +- compatible : should be "alphascale,asm9260-wdt". +- reg : Specifies base physical address and size of the registers. +- clocks : the clocks feeding the watchdog timer. See clock-bindings.txt +- clock-names : should be set to + "mod" - source for tick counter. + "ahb" - ahb gate. +- resets : phandle pointing to the system reset controller with + line index for the watchdog. +- reset-names : should be set to "wdt_rst". + +Optional properties: +- timeout-sec : shall contain the default watchdog timeout in seconds, + if unset, the default timeout is 30 seconds. +- alphascale,mode : three modes are supported + "hw" - hw reset (default). + "sw" - sw reset. + "debug" - no action is taken. + +Example: + +watchdog0: watchdog@80048000 { + compatible = "alphascale,asm9260-wdt"; + reg = <0x80048000 0x10>; + clocks = <&acc CLKID_SYS_WDT>, <&acc CLKID_AHB_WDT>; + clock-names = "mod", "ahb"; + interrupts = <55>; + resets = <&rst WDT_RESET>; + reset-names = "wdt_rst"; + timeout-sec = <30>; + alphascale,mode = "hw"; +}; diff --git a/Documentation/devicetree/bindings/watchdog/amlogic,meson-gxbb-wdt.yaml b/Documentation/devicetree/bindings/watchdog/amlogic,meson-gxbb-wdt.yaml new file mode 100644 index 000000000..497d60408 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/amlogic,meson-gxbb-wdt.yaml @@ -0,0 +1,42 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +# Copyright 2019 BayLibre, SAS +%YAML 1.2 +--- +$id: "http://devicetree.org/schemas/watchdog/amlogic,meson-gxbb-wdt.yaml#" +$schema: "http://devicetree.org/meta-schemas/core.yaml#" + +title: Meson GXBB SoCs Watchdog timer + +maintainers: + - Neil Armstrong <neil.armstrong@linaro.org> + +allOf: + - $ref: watchdog.yaml# + +properties: + compatible: + enum: + - amlogic,meson-gxbb-wdt + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + description: + A phandle to the clock of this PHY + +required: + - compatible + - reg + - clocks + +unevaluatedProperties: false + +examples: + - | + watchdog@98d0 { + compatible = "amlogic,meson-gxbb-wdt"; + reg = <0x98d0 0x10>; + clocks = <&xtal>; + }; diff --git a/Documentation/devicetree/bindings/watchdog/apple,wdt.yaml b/Documentation/devicetree/bindings/watchdog/apple,wdt.yaml new file mode 100644 index 000000000..e58c56a6f --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/apple,wdt.yaml @@ -0,0 +1,52 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/apple,wdt.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Apple SoC Watchdog + +allOf: + - $ref: "watchdog.yaml#" + +maintainers: + - Sven Peter <sven@svenpeter.dev> + +properties: + compatible: + items: + - enum: + - apple,t8103-wdt + - apple,t6000-wdt + - const: apple,wdt + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + + interrupts: + maxItems: 1 + +required: + - compatible + - reg + - clocks + - interrupts + +unevaluatedProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/apple-aic.h> + #include <dt-bindings/interrupt-controller/irq.h> + + wdt: watchdog@50000000 { + compatible = "apple,t8103-wdt", "apple,wdt"; + reg = <0x50000000 0x4000>; + clocks = <&clk>; + interrupts = <AIC_IRQ 123 IRQ_TYPE_LEVEL_HIGH>; + }; + +... diff --git a/Documentation/devicetree/bindings/watchdog/arm,sbsa-gwdt.yaml b/Documentation/devicetree/bindings/watchdog/arm,sbsa-gwdt.yaml new file mode 100644 index 000000000..6bfa46353 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/arm,sbsa-gwdt.yaml @@ -0,0 +1,51 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/arm,sbsa-gwdt.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: SBSA (Server Base System Architecture) Generic Watchdog + +maintainers: + - Fu Wei <fu.wei@linaro.org> + +description: | + The SBSA Generic Watchdog Timer is used to force a reset of the system after + two stages of timeout have elapsed. A detailed definition of the watchdog + timer can be found in the ARM document: ARM-DEN-0029 - Server Base System + Architecture (SBSA) + +allOf: + - $ref: watchdog.yaml# + +properties: + compatible: + const: arm,sbsa-gwdt + + reg: + items: + - description: Watchdog control frame + - description: Refresh frame + + interrupts: + description: The Watchdog Signal 0 (WS0) SPI (Shared Peripheral Interrupt) + maxItems: 1 + +required: + - compatible + - reg + - interrupts + +unevaluatedProperties: false + +examples: + - | + + watchdog@2a440000 { + compatible = "arm,sbsa-gwdt"; + reg = <0x2a440000 0x1000>, + <0x2a450000 0x1000>; + interrupts = <0 27 4>; + timeout-sec = <30>; + }; +... diff --git a/Documentation/devicetree/bindings/watchdog/arm,sp805.yaml b/Documentation/devicetree/bindings/watchdog/arm,sp805.yaml new file mode 100644 index 000000000..a69cac8ec --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/arm,sp805.yaml @@ -0,0 +1,71 @@ +# SPDX-License-Identifier: GPL-2.0 +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/arm,sp805.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: ARM AMBA Primecell SP805 Watchdog + +maintainers: + - Viresh Kumar <vireshk@kernel.org> + +description: |+ + The Arm SP805 IP implements a watchdog device, which triggers an interrupt + after a configurable time period. If that interrupt has not been serviced + when the next interrupt would be triggered, the reset signal is asserted. + +allOf: + - $ref: /schemas/watchdog/watchdog.yaml# + +# Need a custom select here or 'arm,primecell' will match on lots of nodes +select: + properties: + compatible: + contains: + const: arm,sp805 + required: + - compatible + +properties: + compatible: + items: + - const: arm,sp805 + - const: arm,primecell + + interrupts: + maxItems: 1 + + reg: + maxItems: 1 + + clocks: + description: | + Clocks driving the watchdog timer hardware. The first clock is used + for the actual watchdog counter. The second clock drives the register + interface. + minItems: 2 + maxItems: 2 + + clock-names: + items: + - const: wdog_clk + - const: apb_pclk + +required: + - compatible + - reg + - clocks + - clock-names + +unevaluatedProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + watchdog@66090000 { + compatible = "arm,sp805", "arm,primecell"; + reg = <0x66090000 0x1000>; + interrupts = <GIC_SPI 406 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&wdt_clk>, <&apb_pclk>; + clock-names = "wdog_clk", "apb_pclk"; + }; diff --git a/Documentation/devicetree/bindings/watchdog/arm,twd-wdt.yaml b/Documentation/devicetree/bindings/watchdog/arm,twd-wdt.yaml new file mode 100644 index 000000000..bb8901854 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/arm,twd-wdt.yaml @@ -0,0 +1,50 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/arm,twd-wdt.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: ARM Timer-Watchdog Watchdog + +maintainers: + - Rob Herring <robh@kernel.org> + +description: + ARM 11MP, Cortex-A5 and Cortex-A9 are often associated with a per-core + Timer-Watchdog (aka TWD), which provides both a per-cpu local timer + and watchdog. + + The TWD is usually attached to a GIC to deliver its two per-processor + interrupts. + +properties: + compatible: + enum: + - arm,cortex-a9-twd-wdt + - arm,cortex-a5-twd-wdt + - arm,arm11mp-twd-wdt + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + clocks: + maxItems: 1 + +required: + - compatible + - reg + +additionalProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + + watchdog@2c000620 { + compatible = "arm,arm11mp-twd-wdt"; + reg = <0x2c000620 0x20>; + interrupts = <GIC_PPI 14 0xf01>; + }; diff --git a/Documentation/devicetree/bindings/watchdog/arm-smc-wdt.yaml b/Documentation/devicetree/bindings/watchdog/arm-smc-wdt.yaml new file mode 100644 index 000000000..e3a1d7957 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/arm-smc-wdt.yaml @@ -0,0 +1,38 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/arm-smc-wdt.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: ARM Secure Monitor Call based watchdog + +allOf: + - $ref: "watchdog.yaml#" + +maintainers: + - Julius Werner <jwerner@chromium.org> + +properties: + compatible: + enum: + - arm,smc-wdt + arm,smc-id: + $ref: /schemas/types.yaml#/definitions/uint32 + description: | + The ATF smc function id used by the firmware. + Defaults to 0x82003D06 if unset. + +required: + - compatible + +unevaluatedProperties: false + +examples: + - | + watchdog { + compatible = "arm,smc-wdt"; + arm,smc-id = <0x82003D06>; + timeout-sec = <15>; + }; + +... diff --git a/Documentation/devicetree/bindings/watchdog/armada-37xx-wdt.txt b/Documentation/devicetree/bindings/watchdog/armada-37xx-wdt.txt new file mode 100644 index 000000000..a8d00c31a --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/armada-37xx-wdt.txt @@ -0,0 +1,23 @@ +* Armada 37xx CPU Watchdog Timer Controller + +Required properties: +- compatible : must be "marvell,armada-3700-wdt" +- reg : base physical address of the controller and length of memory mapped + region. +- clocks : the clock feeding the watchdog timer. See clock-bindings.txt +- marvell,system-controller : reference to syscon node for the CPU Miscellaneous + Registers + +Example: + + cpu_misc: system-controller@d000 { + compatible = "marvell,armada-3700-cpu-misc", "syscon"; + reg = <0xd000 0x1000>; + }; + + wdt: watchdog@8300 { + compatible = "marvell,armada-3700-wdt"; + reg = <0x8300 0x40>; + marvell,system-controller = <&cpu_misc>; + clocks = <&xtalclk>; + }; diff --git a/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt b/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt new file mode 100644 index 000000000..a8197632d --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt @@ -0,0 +1,57 @@ +Aspeed Watchdog Timer + +Required properties: + - compatible: must be one of: + - "aspeed,ast2400-wdt" + - "aspeed,ast2500-wdt" + - "aspeed,ast2600-wdt" + + - reg: physical base address of the controller and length of memory mapped + region + +Optional properties: + + - aspeed,reset-type = "cpu|soc|system|none" + + Reset behavior - Whenever a timeout occurs the watchdog can be programmed + to generate one of three different, mutually exclusive, types of resets. + + Type "none" can be specified to indicate that no resets are to be done. + This is useful in situations where another watchdog engine on chip is + to perform the reset. + + If 'aspeed,reset-type=' is not specified the default is to enable system + reset. + + Reset types: + + - cpu: Reset CPU on watchdog timeout + + - soc: Reset 'System on Chip' on watchdog timeout + + - system: Reset system on watchdog timeout + + - none: No reset is performed on timeout. Assumes another watchdog + engine is responsible for this. + + - aspeed,alt-boot: If property is present then boot from alternate block. + - aspeed,external-signal: If property is present then signal is sent to + external reset counter (only WDT1 and WDT2). If not + specified no external signal is sent. + - aspeed,ext-pulse-duration: External signal pulse duration in microseconds + +Optional properties for AST2500-compatible watchdogs: + - aspeed,ext-push-pull: If aspeed,external-signal is present, set the pin's + drive type to push-pull. The default is open-drain. + - aspeed,ext-active-high: If aspeed,external-signal is present and and the pin + is configured as push-pull, then set the pulse + polarity to active-high. The default is active-low. + +Example: + + wdt1: watchdog@1e785000 { + compatible = "aspeed,ast2400-wdt"; + reg = <0x1e785000 0x1c>; + aspeed,reset-type = "system"; + aspeed,external-signal; + }; diff --git a/Documentation/devicetree/bindings/watchdog/atmel,at91sam9-wdt.yaml b/Documentation/devicetree/bindings/watchdog/atmel,at91sam9-wdt.yaml new file mode 100644 index 000000000..ad27bc518 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/atmel,at91sam9-wdt.yaml @@ -0,0 +1,127 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +# Copyright (C) 2022 Microchip Technology, Inc. and its subsidiaries +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/atmel,at91sam9-wdt.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Atmel Watchdog Timers + +maintainers: + - Eugen Hristev <eugen.hristev@microchip.com> + +properties: + compatible: + const: atmel,at91sam9260-wdt + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + + interrupts: + maxItems: 1 + + atmel,max-heartbeat-sec: + description: + Should contain the maximum heartbeat value in seconds. This value + should be less or equal to 16. It is used to compute the WDV field. + maximum: 16 + + atmel,min-heartbeat-sec: + description: + Should contain the minimum heartbeat value in seconds. This value + must be smaller than the max-heartbeat-sec value. It is used to + compute the WDD field. + maximum: 16 + + atmel,watchdog-type: + $ref: /schemas/types.yaml#/definitions/string + description: | + Should be hardware or software. + oneOf: + - description: + Hardware watchdog uses the at91 watchdog reset. + const: hardware + - description: | + Software watchdog uses the watchdog interrupt + to trigger a software reset. + const: software + default: hardware + + atmel,reset-type: + $ref: /schemas/types.yaml#/definitions/string + description: | + Should be proc or all. This is valid only when using hardware watchdog. + oneOf: + - description: + Assert peripherals and processor reset signals. + const: all + - description: + Assert the processor reset signal. + const: proc + default: all + + atmel,disable: + $ref: /schemas/types.yaml#/definitions/flag + description: + Should be present if you want to stop the watchdog. + + atmel,idle-halt: + $ref: /schemas/types.yaml#/definitions/flag + description: | + Should be present if you want to stop the watchdog when + entering idle state. + CAUTION: This property should be used with care, it actually makes the + watchdog not counting when the CPU is in idle state, therefore the + watchdog reset time depends on mean CPU usage and will not reset at all + if the CPU stops working while it is in idle state, which is probably + not what you want. + + atmel,dbg-halt: + $ref: /schemas/types.yaml#/definitions/flag + description: | + Should be present if you want to stop the watchdog when + entering debug state. + +required: + - compatible + - reg + - clocks + +allOf: + - $ref: watchdog.yaml# + - if: + properties: + atmel,reset-type: + enum: + - all + - proc + then: + properties: + atmel,watchdog-type: + const: hardware + +dependencies: + atmel,reset-type: ['atmel,watchdog-type'] + +unevaluatedProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/irq.h> + + watchdog@fffffd40 { + compatible = "atmel,at91sam9260-wdt"; + reg = <0xfffffd40 0x10>; + interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>; + clocks = <&clk32k>; + timeout-sec = <15>; + atmel,watchdog-type = "hardware"; + atmel,reset-type = "all"; + atmel,dbg-halt; + atmel,idle-halt; + atmel,max-heartbeat-sec = <16>; + atmel,min-heartbeat-sec = <0>; + }; diff --git a/Documentation/devicetree/bindings/watchdog/atmel,sama5d4-wdt.yaml b/Documentation/devicetree/bindings/watchdog/atmel,sama5d4-wdt.yaml new file mode 100644 index 000000000..a9635c037 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/atmel,sama5d4-wdt.yaml @@ -0,0 +1,77 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/atmel,sama5d4-wdt.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Atmel SAMA5D4 Watchdog Timer (WDT) Controller + +maintainers: + - Eugen Hristev <eugen.hristev@microchip.com> + +allOf: + - $ref: "watchdog.yaml#" + +properties: + compatible: + enum: + - atmel,sama5d4-wdt + - microchip,sam9x60-wdt + - microchip,sama7g5-wdt + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + atmel,watchdog-type: + $ref: /schemas/types.yaml#/definitions/string + description: should be hardware or software. + oneOf: + - description: + Enable watchdog fault reset. A watchdog fault triggers + watchdog reset. + const: hardware + - description: + Enable watchdog fault interrupt. A watchdog fault asserts + watchdog interrupt. + const: software + default: hardware + + atmel,idle-halt: + $ref: /schemas/types.yaml#/definitions/flag + description: | + present if you want to stop the watchdog when the CPU is in idle state. + CAUTION: This property should be used with care, it actually makes the + watchdog not counting when the CPU is in idle state, therefore the + watchdog reset time depends on mean CPU usage and will not reset at all + if the CPU stop working while it is in idle state, which is probably + not what you want. + + atmel,dbg-halt: + $ref: /schemas/types.yaml#/definitions/flag + description: | + present if you want to stop the watchdog when the CPU is in debug state. + +required: + - compatible + - reg + +unevaluatedProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/irq.h> + + watchdog@fc068640 { + compatible = "atmel,sama5d4-wdt"; + reg = <0xfc068640 0x10>; + interrupts = <4 IRQ_TYPE_LEVEL_HIGH 5>; + timeout-sec = <10>; + atmel,watchdog-type = "hardware"; + atmel,dbg-halt; + atmel,idle-halt; + }; + +... diff --git a/Documentation/devicetree/bindings/watchdog/atmel-at91rm9200-wdt.txt b/Documentation/devicetree/bindings/watchdog/atmel-at91rm9200-wdt.txt new file mode 100644 index 000000000..d4d86cf8f --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/atmel-at91rm9200-wdt.txt @@ -0,0 +1,9 @@ +Atmel AT91RM9200 System Timer Watchdog + +Required properties: +- compatible: must be "atmel,at91sam9260-wdt". + +Example: + watchdog@fffffd00 { + compatible = "atmel,at91rm9200-wdt"; + }; diff --git a/Documentation/devicetree/bindings/watchdog/brcm,bcm2835-pm-wdog.txt b/Documentation/devicetree/bindings/watchdog/brcm,bcm2835-pm-wdog.txt new file mode 100644 index 000000000..f801d71de --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/brcm,bcm2835-pm-wdog.txt @@ -0,0 +1,18 @@ +BCM2835 Watchdog timer + +Required properties: + +- compatible : should be "brcm,bcm2835-pm-wdt" +- reg : Specifies base physical address and size of the registers. + +Optional properties: + +- timeout-sec : Contains the watchdog timeout in seconds + +Example: + +watchdog { + compatible = "brcm,bcm2835-pm-wdt"; + reg = <0x7e100000 0x28>; + timeout-sec = <10>; +}; diff --git a/Documentation/devicetree/bindings/watchdog/brcm,bcm7038-wdt.yaml b/Documentation/devicetree/bindings/watchdog/brcm,bcm7038-wdt.yaml new file mode 100644 index 000000000..a92680935 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/brcm,bcm7038-wdt.yaml @@ -0,0 +1,43 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/brcm,bcm7038-wdt.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: BCM63xx and BCM7038 watchdog timer + +allOf: + - $ref: "watchdog.yaml#" + +maintainers: + - Florian Fainelli <f.fainelli@gmail.com> + - Justin Chen <justinpopo6@gmail.com> + - Rafał Miłecki <rafal@milecki.pl> + +properties: + compatible: + enum: + - brcm,bcm6345-wdt + - brcm,bcm7038-wdt + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + description: > + The clock running the watchdog. If no clock is found the driver will + default to 27000000 Hz. + +unevaluatedProperties: false + +required: + - reg + +examples: + - | + watchdog@f040a7e8 { + compatible = "brcm,bcm7038-wdt"; + reg = <0xf040a7e8 0x16>; + clocks = <&upg_fixed>; + }; diff --git a/Documentation/devicetree/bindings/watchdog/brcm,kona-wdt.txt b/Documentation/devicetree/bindings/watchdog/brcm,kona-wdt.txt new file mode 100644 index 000000000..2b86a00e3 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/brcm,kona-wdt.txt @@ -0,0 +1,15 @@ +Broadcom Kona Family Watchdog Timer +----------------------------------- + +This watchdog timer is used in the following Broadcom SoCs: + BCM11130, BCM11140, BCM11351, BCM28145, BCM28155 + +Required properties: + - compatible = "brcm,bcm11351-wdt", "brcm,kona-wdt"; + - reg: memory address & range + +Example: + watchdog@35002f40 { + compatible = "brcm,bcm11351-wdt", "brcm,kona-wdt"; + reg = <0x35002f40 0x6c>; + }; diff --git a/Documentation/devicetree/bindings/watchdog/cadence-wdt.txt b/Documentation/devicetree/bindings/watchdog/cadence-wdt.txt new file mode 100644 index 000000000..750a87657 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/cadence-wdt.txt @@ -0,0 +1,23 @@ +Zynq Watchdog Device Tree Bindings +------------------------------------------- + +Required properties: +- compatible : Should be "cdns,wdt-r1p2". +- clocks : This is pclk (APB clock). +- interrupts : This is wd_irq - watchdog timeout interrupt. + +Optional properties +- reset-on-timeout : If this property exists, then a reset is done + when watchdog times out. +- timeout-sec : Watchdog timeout value (in seconds). + +Example: + watchdog@f8005000 { + compatible = "cdns,wdt-r1p2"; + clocks = <&clkc 45>; + interrupt-parent = <&intc>; + interrupts = <0 9 1>; + reg = <0xf8005000 0x1000>; + reset-on-timeout; + timeout-sec = <10>; + }; diff --git a/Documentation/devicetree/bindings/watchdog/da9062-wdt.txt b/Documentation/devicetree/bindings/watchdog/da9062-wdt.txt new file mode 100644 index 000000000..354314d85 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/da9062-wdt.txt @@ -0,0 +1,34 @@ +* Dialog Semiconductor DA9062/61 Watchdog Timer + +Required properties: + +- compatible: should be one of the following valid compatible string lines: + "dlg,da9061-watchdog", "dlg,da9062-watchdog" + "dlg,da9062-watchdog" + +Optional properties: +- dlg,use-sw-pm: Add this property to disable the watchdog during suspend. + Only use this option if you can't use the watchdog automatic suspend + function during a suspend (see register CONTROL_B). +- dlg,wdt-sd: Set what happens on watchdog timeout. If this bit is set the + watchdog timeout triggers SHUTDOWN, if cleared the watchdog triggers + POWERDOWN. Can be 0 or 1. Only use this option if you want to change the + default chip's OTP setting for WATCHDOG_SD bit. If this property is NOT + set the WATCHDOG_SD bit and on timeout watchdog behavior will match the + chip's OTP settings. + +Example: DA9062 + + pmic0: da9062@58 { + watchdog { + compatible = "dlg,da9062-watchdog"; + }; + }; + +Example: DA9061 using a fall-back compatible for the DA9062 watchdog driver + + pmic0: da9061@58 { + watchdog { + compatible = "dlg,da9061-watchdog", "dlg,da9062-watchdog"; + }; + }; diff --git a/Documentation/devicetree/bindings/watchdog/davinci-wdt.txt b/Documentation/devicetree/bindings/watchdog/davinci-wdt.txt new file mode 100644 index 000000000..aa10b8ec3 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/davinci-wdt.txt @@ -0,0 +1,24 @@ +Texas Instruments DaVinci/Keystone Watchdog Timer (WDT) Controller + +Required properties: +- compatible : Should be "ti,davinci-wdt", "ti,keystone-wdt" +- reg : Should contain WDT registers location and length + +Optional properties: +- timeout-sec : Contains the watchdog timeout in seconds +- clocks : the clock feeding the watchdog timer. + Needed if platform uses clocks. + See clock-bindings.txt + +Documentation: +Davinci DM646x - https://www.ti.com/lit/ug/spruer5b/spruer5b.pdf +Keystone - https://www.ti.com/lit/ug/sprugv5a/sprugv5a.pdf + +Examples: + +wdt: wdt@2320000 { + compatible = "ti,davinci-wdt"; + reg = <0x02320000 0x80>; + timeout-sec = <30>; + clocks = <&clkwdtimer0>; +}; diff --git a/Documentation/devicetree/bindings/watchdog/digicolor-wdt.txt b/Documentation/devicetree/bindings/watchdog/digicolor-wdt.txt new file mode 100644 index 000000000..a882967e1 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/digicolor-wdt.txt @@ -0,0 +1,25 @@ +Conexant Digicolor SoCs Watchdog timer + +The watchdog functionality in Conexant Digicolor SoCs relies on the so called +"Agent Communication" block. This block includes the eight programmable system +timer counters. The first timer (called "Timer A") is the only one that can be +used as watchdog. + +Required properties: + +- compatible : Should be "cnxt,cx92755-wdt" +- reg : Specifies base physical address and size of the registers +- clocks : phandle; specifies the clock that drives the timer + +Optional properties: + +- timeout-sec : Contains the watchdog timeout in seconds + +Example: + + watchdog@f0000fc0 { + compatible = "cnxt,cx92755-wdt"; + reg = <0xf0000fc0 0x8>; + clocks = <&main_clk>; + timeout-sec = <15>; + }; diff --git a/Documentation/devicetree/bindings/watchdog/faraday,ftwdt010.yaml b/Documentation/devicetree/bindings/watchdog/faraday,ftwdt010.yaml new file mode 100644 index 000000000..6ecd429f7 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/faraday,ftwdt010.yaml @@ -0,0 +1,67 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/faraday,ftwdt010.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Faraday Technology FTWDT010 watchdog + +maintainers: + - Linus Walleij <linus.walleij@linaro.org> + - Corentin Labbe <clabbe@baylibre.com> + +description: | + This is an IP part from Faraday Technology found in the Gemini + SoCs and others. + +allOf: + - $ref: "watchdog.yaml#" + +properties: + compatible: + oneOf: + - const: faraday,ftwdt010 + - items: + - enum: + - cortina,gemini-watchdog + - moxa,moxart-watchdog + - const: faraday,ftwdt010 + + reg: + maxItems: 1 + + resets: + maxItems: 1 + + clocks: + maxItems: 1 + + clock-names: + const: PCLK + + interrupts: + maxItems: 1 + +required: + - compatible + - reg + +unevaluatedProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/irq.h> + watchdog@41000000 { + compatible = "faraday,ftwdt010"; + reg = <0x41000000 0x1000>; + interrupts = <3 IRQ_TYPE_LEVEL_HIGH>; + timeout-sec = <5>; + }; + - | + watchdog: watchdog@98500000 { + compatible = "moxa,moxart-watchdog", "faraday,ftwdt010"; + reg = <0x98500000 0x10>; + clocks = <&clk_apb>; + clock-names = "PCLK"; + }; +... diff --git a/Documentation/devicetree/bindings/watchdog/fsl,scu-wdt.yaml b/Documentation/devicetree/bindings/watchdog/fsl,scu-wdt.yaml new file mode 100644 index 000000000..f84c45d68 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/fsl,scu-wdt.yaml @@ -0,0 +1,34 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/fsl,scu-wdt.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: i.MX SCU Client Device Node - Watchdog bindings based on SCU Message Protocol + +maintainers: + - Dong Aisheng <aisheng.dong@nxp.com> + +description: i.MX SCU Client Device Node + Client nodes are maintained as children of the relevant IMX-SCU device node. + +allOf: + - $ref: watchdog.yaml# + +properties: + compatible: + items: + - const: fsl,imx8qxp-sc-wdt + - const: fsl,imx-sc-wdt + +required: + - compatible + +unevaluatedProperties: false + +examples: + - | + watchdog { + compatible = "fsl,imx8qxp-sc-wdt", "fsl,imx-sc-wdt"; + timeout-sec = <60>; + }; diff --git a/Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.yaml b/Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.yaml new file mode 100644 index 000000000..fb7695515 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.yaml @@ -0,0 +1,77 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/fsl-imx-wdt.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Freescale i.MX Watchdog Timer (WDT) Controller + +maintainers: + - Anson Huang <Anson.Huang@nxp.com> + +allOf: + - $ref: "watchdog.yaml#" + +properties: + compatible: + oneOf: + - const: fsl,imx21-wdt + - items: + - enum: + - fsl,imx25-wdt + - fsl,imx27-wdt + - fsl,imx31-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,ls1012a-wdt + - fsl,ls1043a-wdt + - fsl,vf610-wdt + - const: fsl,imx21-wdt + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + clocks: + maxItems: 1 + + fsl,ext-reset-output: + $ref: /schemas/types.yaml#/definitions/flag + description: | + If present, the watchdog device is configured to assert its + external reset (WDOG_B) instead of issuing a software reset. + +required: + - compatible + - interrupts + - reg + +unevaluatedProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + #include <dt-bindings/clock/imx6qdl-clock.h> + + watchdog@20bc000 { + compatible = "fsl,imx21-wdt"; + reg = <0x020bc000 0x4000>; + interrupts = <0 80 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&clks IMX6QDL_CLK_IPG>; + }; + +... diff --git a/Documentation/devicetree/bindings/watchdog/fsl-imx7ulp-wdt.yaml b/Documentation/devicetree/bindings/watchdog/fsl-imx7ulp-wdt.yaml new file mode 100644 index 000000000..8562978aa --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/fsl-imx7ulp-wdt.yaml @@ -0,0 +1,58 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/fsl-imx7ulp-wdt.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Freescale i.MX7ULP Watchdog Timer (WDT) Controller + +maintainers: + - Anson Huang <Anson.Huang@nxp.com> + +allOf: + - $ref: "watchdog.yaml#" + +properties: + compatible: + oneOf: + - const: fsl,imx7ulp-wdt + - items: + - const: fsl,imx8ulp-wdt + - const: fsl,imx7ulp-wdt + - const: fsl,imx93-wdt + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + clocks: + maxItems: 1 + + timeout-sec: true + +required: + - compatible + - interrupts + - reg + - clocks + +additionalProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + #include <dt-bindings/clock/imx7ulp-clock.h> + + watchdog@403d0000 { + compatible = "fsl,imx7ulp-wdt"; + reg = <0x403d0000 0x10000>; + interrupts = <GIC_SPI 55 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&pcc2 IMX7ULP_CLK_WDG1>; + assigned-clocks = <&pcc2 IMX7ULP_CLK_WDG1>; + assigned-clock-parents = <&scg1 IMX7ULP_CLK_FIRC_BUS_CLK>; + timeout-sec = <40>; + }; + +... diff --git a/Documentation/devicetree/bindings/watchdog/gpio-wdt.txt b/Documentation/devicetree/bindings/watchdog/gpio-wdt.txt new file mode 100644 index 000000000..198794963 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/gpio-wdt.txt @@ -0,0 +1,28 @@ +* GPIO-controlled Watchdog + +Required Properties: +- compatible: Should contain "linux,wdt-gpio". +- gpios: From common gpio binding; gpio connection to WDT reset pin. +- hw_algo: The algorithm used by the driver. Should be one of the + following values: + - toggle: 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. + - level: Low or high level starts counting WDT timeout, + the opposite level disables the WDT. Active level is determined + by the GPIO flags. +- hw_margin_ms: Maximum time to reset watchdog circuit (milliseconds). + +Optional Properties: +- always-running: 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. + +Example: + watchdog: watchdog { + /* ADM706 */ + compatible = "linux,wdt-gpio"; + gpios = <&gpio3 9 GPIO_ACTIVE_LOW>; + hw_algo = "toggle"; + hw_margin_ms = <1600>; + }; diff --git a/Documentation/devicetree/bindings/watchdog/imgpdc-wdt.txt b/Documentation/devicetree/bindings/watchdog/imgpdc-wdt.txt new file mode 100644 index 000000000..b2fa11fd4 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/imgpdc-wdt.txt @@ -0,0 +1,19 @@ +*ImgTec PowerDown Controller (PDC) Watchdog Timer (WDT) + +Required properties: +- compatible : Should be "img,pdc-wdt" +- reg : Should contain WDT registers location and length +- clocks: Must contain an entry for each entry in clock-names. +- clock-names: Should contain "wdt" and "sys"; the watchdog counter + clock and register interface clock respectively. +- interrupts : Should contain WDT interrupt + +Examples: + +watchdog@18102100 { + compatible = "img,pdc-wdt"; + reg = <0x18102100 0x100>; + clocks = <&pdc_wdt_clk>, <&sys_clk>; + clock-names = "wdt", "sys"; + interrupts = <0 52 IRQ_TYPE_LEVEL_HIGH>; +}; diff --git a/Documentation/devicetree/bindings/watchdog/intel,keembay-wdt.yaml b/Documentation/devicetree/bindings/watchdog/intel,keembay-wdt.yaml new file mode 100644 index 000000000..1437ff8a1 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/intel,keembay-wdt.yaml @@ -0,0 +1,57 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/intel,keembay-wdt.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Intel Keem Bay SoC non-secure Watchdog Timer + +maintainers: + - Wan Ahmad Zainie <wan.ahmad.zainie.wan.mohamad@intel.com> + +properties: + compatible: + enum: + - intel,keembay-wdt + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + + interrupts: + items: + - description: interrupt specifier for threshold interrupt line + - description: interrupt specifier for timeout interrupt line + + interrupt-names: + items: + - const: threshold + - const: timeout + +required: + - compatible + - reg + - interrupts + - interrupt-names + - clocks + +additionalProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + #include <dt-bindings/interrupt-controller/irq.h> + #define KEEM_BAY_A53_TIM + + watchdog: watchdog@2033009c { + compatible = "intel,keembay-wdt"; + reg = <0x2033009c 0x10>; + interrupts = <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>; + interrupt-names = "threshold", "timeout"; + clocks = <&scmi_clk KEEM_BAY_A53_TIM>; + }; + +... diff --git a/Documentation/devicetree/bindings/watchdog/kontron,sl28cpld-wdt.yaml b/Documentation/devicetree/bindings/watchdog/kontron,sl28cpld-wdt.yaml new file mode 100644 index 000000000..179272f74 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/kontron,sl28cpld-wdt.yaml @@ -0,0 +1,35 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/kontron,sl28cpld-wdt.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Watchdog driver for the sl28cpld board management controller + +maintainers: + - Michael Walle <michael@walle.cc> + +description: | + This module is part of the sl28cpld multi-function device. For more + details see ../mfd/kontron,sl28cpld.yaml. + +allOf: + - $ref: watchdog.yaml# + +properties: + compatible: + const: kontron,sl28cpld-wdt + + reg: + maxItems: 1 + + kontron,assert-wdt-timeout-pin: + description: The SMARC standard defines a WDT_TIME_OUT# pin. If this + property is set, this output will be pulsed when the watchdog bites + and the system resets. + type: boolean + +required: + - compatible + +additionalProperties: false diff --git a/Documentation/devicetree/bindings/watchdog/lantiq-wdt.txt b/Documentation/devicetree/bindings/watchdog/lantiq-wdt.txt new file mode 100644 index 000000000..18d4d8302 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/lantiq-wdt.txt @@ -0,0 +1,24 @@ +Lantiq WTD watchdog binding +============================ + +This describes the binding of the Lantiq watchdog driver. + +------------------------------------------------------------------------------- +Required properties: +- compatible : Should be one of + "lantiq,wdt" + "lantiq,xrx100-wdt" + "lantiq,xrx200-wdt", "lantiq,xrx100-wdt" + "lantiq,falcon-wdt" +- reg : Address of the watchdog block +- lantiq,rcu : A phandle to the RCU syscon (required for + "lantiq,falcon-wdt" and "lantiq,xrx100-wdt") + +------------------------------------------------------------------------------- +Example for the watchdog on the xRX200 SoCs: + watchdog@803f0 { + compatible = "lantiq,xrx200-wdt", "lantiq,xrx100-wdt"; + reg = <0x803f0 0x10>; + + lantiq,rcu = <&rcu0>; + }; diff --git a/Documentation/devicetree/bindings/watchdog/lpc18xx-wdt.txt b/Documentation/devicetree/bindings/watchdog/lpc18xx-wdt.txt new file mode 100644 index 000000000..09f6b2496 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/lpc18xx-wdt.txt @@ -0,0 +1,19 @@ +* NXP LPC18xx Watchdog Timer (WDT) + +Required properties: +- compatible: Should be "nxp,lpc1850-wwdt" +- reg: Should contain WDT registers location and length +- clocks: Must contain an entry for each entry in clock-names. +- clock-names: Should contain "wdtclk" and "reg"; the watchdog counter + clock and register interface clock respectively. +- interrupts: Should contain WDT interrupt + +Examples: + +watchdog@40080000 { + compatible = "nxp,lpc1850-wwdt"; + reg = <0x40080000 0x24>; + clocks = <&cgu BASE_SAFE_CLK>, <&ccu1 CLK_CPU_WWDT>; + clock-names = "wdtclk", "reg"; + interrupts = <49>; +}; diff --git a/Documentation/devicetree/bindings/watchdog/marvel.txt b/Documentation/devicetree/bindings/watchdog/marvel.txt new file mode 100644 index 000000000..c1b67a78f --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/marvel.txt @@ -0,0 +1,45 @@ +* Marvell Orion Watchdog Time + +Required Properties: + +- Compatibility : "marvell,orion-wdt" + "marvell,armada-370-wdt" + "marvell,armada-xp-wdt" + "marvell,armada-375-wdt" + "marvell,armada-380-wdt" + +- reg : Should contain two entries: first one with the + timer control address, second one with the + rstout enable address. + +For "marvell,armada-375-wdt" and "marvell,armada-380-wdt": + +- reg : A third entry is mandatory and should contain the + shared mask/unmask RSTOUT address. + +Clocks required for compatibles = "marvell,orion-wdt", + "marvell,armada-370-wdt": +- clocks : Must contain a single entry describing the clock input + +Clocks required for compatibles = "marvell,armada-xp-wdt" + "marvell,armada-375-wdt" + "marvell,armada-380-wdt": +- clocks : Must contain an entry for each entry in clock-names. +- clock-names : Must include the following entries: + "nbclk" (L2/coherency fabric clock), + "fixed" (Reference 25 MHz fixed-clock). + +Optional properties: + +- interrupts : Contains the IRQ for watchdog expiration +- timeout-sec : Contains the watchdog timeout in seconds + +Example: + + wdt@20300 { + compatible = "marvell,orion-wdt"; + reg = <0x20300 0x28>, <0x20108 0x4>; + interrupts = <3>; + timeout-sec = <10>; + clocks = <&gate_clk 7>; + }; diff --git a/Documentation/devicetree/bindings/watchdog/maxim,max63xx.yaml b/Documentation/devicetree/bindings/watchdog/maxim,max63xx.yaml new file mode 100644 index 000000000..ab9641e84 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/maxim,max63xx.yaml @@ -0,0 +1,44 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/maxim,max63xx.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Maxim 63xx Watchdog Timers + +allOf: + - $ref: "watchdog.yaml#" + +maintainers: + - Marc Zyngier <maz@kernel.org> + - Linus Walleij <linus.walleij@linaro.org> + +properties: + compatible: + enum: + - maxim,max6369 + - maxim,max6370 + - maxim,max6371 + - maxim,max6372 + - maxim,max6373 + - maxim,max6374 + + reg: + description: This is a 1-byte memory-mapped address + maxItems: 1 + +required: + - compatible + - reg + +unevaluatedProperties: false + +examples: + - | + wdt: watchdog@50000000 { + compatible = "maxim,max6369"; + reg = <0x50000000 0x1>; + timeout-sec = <10>; + }; + +... diff --git a/Documentation/devicetree/bindings/watchdog/mediatek,mt7621-wdt.yaml b/Documentation/devicetree/bindings/watchdog/mediatek,mt7621-wdt.yaml new file mode 100644 index 000000000..b2b17fdf4 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/mediatek,mt7621-wdt.yaml @@ -0,0 +1,33 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/mediatek,mt7621-wdt.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Ralink Watchdog Timers + +maintainers: + - Sergio Paracuellos <sergio.paracuellos@gmail.com> + +allOf: + - $ref: watchdog.yaml# + +properties: + compatible: + const: mediatek,mt7621-wdt + + reg: + maxItems: 1 + +required: + - compatible + - reg + +additionalProperties: false + +examples: + - | + watchdog@100 { + compatible = "mediatek,mt7621-wdt"; + reg = <0x100 0x100>; + }; diff --git a/Documentation/devicetree/bindings/watchdog/men-a021-wdt.txt b/Documentation/devicetree/bindings/watchdog/men-a021-wdt.txt new file mode 100644 index 000000000..370dee322 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/men-a021-wdt.txt @@ -0,0 +1,25 @@ +Bindings for MEN A21 Watchdog device connected to GPIO lines + +Required properties: +- compatible: "men,a021-wdt" +- gpios: Specifies the pins that control the Watchdog, order: + 1: Watchdog enable + 2: Watchdog fast-mode + 3: Watchdog trigger + 4: Watchdog reset cause bit 0 + 5: Watchdog reset cause bit 1 + 6: Watchdog reset cause bit 2 + +Optional properties: +- None + +Example: + watchdog { + compatible ="men,a021-wdt"; + gpios = <&gpio3 9 1 /* WD_EN */ + &gpio3 10 1 /* WD_FAST */ + &gpio3 11 1 /* WD_TRIG */ + &gpio3 6 1 /* RST_CAUSE[0] */ + &gpio3 7 1 /* RST_CAUSE[1] */ + &gpio3 8 1>; /* RST_CAUSE[2] */ + }; diff --git a/Documentation/devicetree/bindings/watchdog/meson-wdt.txt b/Documentation/devicetree/bindings/watchdog/meson-wdt.txt new file mode 100644 index 000000000..7588cc397 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/meson-wdt.txt @@ -0,0 +1,21 @@ +Meson SoCs Watchdog timer + +Required properties: + +- compatible : depending on the SoC this should be one of: + "amlogic,meson6-wdt" on Meson6 SoCs + "amlogic,meson8-wdt" and "amlogic,meson6-wdt" on Meson8 SoCs + "amlogic,meson8b-wdt" on Meson8b SoCs + "amlogic,meson8m2-wdt" and "amlogic,meson8b-wdt" on Meson8m2 SoCs +- reg : Specifies base physical address and size of the registers. + +Optional properties: +- timeout-sec: contains the watchdog timeout in seconds. + +Example: + +wdt: watchdog@c1109900 { + compatible = "amlogic,meson6-wdt"; + reg = <0xc1109900 0x8>; + timeout-sec = <10>; +}; diff --git a/Documentation/devicetree/bindings/watchdog/microchip,pic32-dmt.txt b/Documentation/devicetree/bindings/watchdog/microchip,pic32-dmt.txt new file mode 100644 index 000000000..49485f831 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/microchip,pic32-dmt.txt @@ -0,0 +1,19 @@ +* Microchip PIC32 Deadman Timer + +The deadman timer is used to reset the processor in the event of a software +malfunction. It is a free-running instruction fetch timer, which is clocked +whenever an instruction fetch occurs until a count match occurs. + +Required properties: +- compatible: must be "microchip,pic32mzda-dmt". +- reg: physical base address of the controller and length of memory mapped + region. +- clocks: phandle of source clk. Should be <&rootclk PB7CLK>. + +Example: + + watchdog@1f800a00 { + compatible = "microchip,pic32mzda-dmt"; + reg = <0x1f800a00 0x80>; + clocks = <&rootclk PB7CLK>; + }; diff --git a/Documentation/devicetree/bindings/watchdog/microchip,pic32-wdt.txt b/Documentation/devicetree/bindings/watchdog/microchip,pic32-wdt.txt new file mode 100644 index 000000000..f03a29a1b --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/microchip,pic32-wdt.txt @@ -0,0 +1,18 @@ +* Microchip PIC32 Watchdog Timer + +When enabled, the watchdog peripheral can be used to reset the device if the +WDT is not cleared periodically in software. + +Required properties: +- compatible: must be "microchip,pic32mzda-wdt". +- reg: physical base address of the controller and length of memory mapped + region. +- clocks: phandle of source clk. Should be <&rootclk LPRCCLK>. + +Example: + + watchdog@1f800800 { + compatible = "microchip,pic32mzda-wdt"; + reg = <0x1f800800 0x200>; + clocks = <&rootclk LPRCCLK>; + }; diff --git a/Documentation/devicetree/bindings/watchdog/moxa,moxart-watchdog.txt b/Documentation/devicetree/bindings/watchdog/moxa,moxart-watchdog.txt new file mode 100644 index 000000000..1169857d1 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/moxa,moxart-watchdog.txt @@ -0,0 +1,15 @@ +MOXA ART Watchdog timer + +Required properties: + +- compatible : Must be "moxa,moxart-watchdog" +- reg : Should contain registers location and length +- clocks : Should contain phandle for the clock that drives the counter + +Example: + + watchdog: watchdog@98500000 { + compatible = "moxa,moxart-watchdog"; + reg = <0x98500000 0x10>; + clocks = <&coreclk>; + }; diff --git a/Documentation/devicetree/bindings/watchdog/mpc8xxx-wdt.txt b/Documentation/devicetree/bindings/watchdog/mpc8xxx-wdt.txt new file mode 100644 index 000000000..a384ff5b3 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/mpc8xxx-wdt.txt @@ -0,0 +1,25 @@ +* Freescale mpc8xxx watchdog driver (For 83xx, 86xx and 8xx) + +Required properties: +- compatible: Shall contain one of the following: + "mpc83xx_wdt" for an mpc83xx + "fsl,mpc8610-wdt" for an mpc86xx + "fsl,mpc823-wdt" for an mpc8xx +- reg: base physical address and length of the area hosting the + watchdog registers. + On the 83xx, "Watchdog Timer Registers" area: <0x200 0x100> + On the 86xx, "Watchdog Timer Registers" area: <0xe4000 0x100> + On the 8xx, "General System Interface Unit" area: <0x0 0x10> + +Optional properties: +- reg: additional physical address and length (4) of location of the + Reset Status Register (called RSTRSCR on the mpc86xx) + On the 83xx, it is located at offset 0x910 + On the 86xx, it is located at offset 0xe0094 + On the 8xx, it is located at offset 0x288 + +Example: + WDT: watchdog@0 { + compatible = "fsl,mpc823-wdt"; + reg = <0x0 0x10 0x288 0x4>; + }; diff --git a/Documentation/devicetree/bindings/watchdog/mstar,msc313e-wdt.yaml b/Documentation/devicetree/bindings/watchdog/mstar,msc313e-wdt.yaml new file mode 100644 index 000000000..33794711c --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/mstar,msc313e-wdt.yaml @@ -0,0 +1,40 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/mstar,msc313e-wdt.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: MStar Watchdog + +maintainers: + - Daniel Palmer <daniel@0x0f.com> + - Romain Perier <romain.perier@gmail.com> + +allOf: + - $ref: watchdog.yaml# + +properties: + compatible: + enum: + - mstar,msc313e-wdt + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + +required: + - compatible + - clocks + - reg + +unevaluatedProperties: false + +examples: + - | + watchdog@6000 { + compatible = "mstar,msc313e-wdt"; + reg = <0x6000 0x1f>; + clocks = <&xtal_div2>; + }; diff --git a/Documentation/devicetree/bindings/watchdog/mtk-wdt.txt b/Documentation/devicetree/bindings/watchdog/mtk-wdt.txt new file mode 100644 index 000000000..762c62e42 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/mtk-wdt.txt @@ -0,0 +1,42 @@ +Mediatek SoCs Watchdog timer + +The watchdog supports a pre-timeout interrupt that fires timeout-sec/2 +before the expiry. + +Required properties: + +- compatible should contain: + "mediatek,mt2701-wdt", "mediatek,mt6589-wdt": for MT2701 + "mediatek,mt2712-wdt": for MT2712 + "mediatek,mt6582-wdt", "mediatek,mt6589-wdt": for MT6582 + "mediatek,mt6589-wdt": for MT6589 + "mediatek,mt6797-wdt", "mediatek,mt6589-wdt": for MT6797 + "mediatek,mt7622-wdt", "mediatek,mt6589-wdt": for MT7622 + "mediatek,mt7623-wdt", "mediatek,mt6589-wdt": for MT7623 + "mediatek,mt7629-wdt", "mediatek,mt6589-wdt": for MT7629 + "mediatek,mt7986-wdt", "mediatek,mt6589-wdt": for MT7986 + "mediatek,mt8183-wdt": for MT8183 + "mediatek,mt8186-wdt", "mediatek,mt6589-wdt": for MT8186 + "mediatek,mt8516-wdt", "mediatek,mt6589-wdt": for MT8516 + "mediatek,mt8192-wdt": for MT8192 + "mediatek,mt8195-wdt", "mediatek,mt6589-wdt": for MT8195 + +- reg : Specifies base physical address and size of the registers. + +Optional properties: +- mediatek,disable-extrst: disable send output reset signal +- interrupts: Watchdog pre-timeout (bark) interrupt. +- timeout-sec: contains the watchdog timeout in seconds. +- #reset-cells: Should be 1. + +Example: + +watchdog: watchdog@10007000 { + compatible = "mediatek,mt8183-wdt", + "mediatek,mt6589-wdt"; + mediatek,disable-extrst; + reg = <0 0x10007000 0 0x100>; + interrupts = <GIC_SPI 139 IRQ_TYPE_NONE>; + timeout-sec = <10>; + #reset-cells = <1>; +}; diff --git a/Documentation/devicetree/bindings/watchdog/nuvoton,npcm-wdt.txt b/Documentation/devicetree/bindings/watchdog/nuvoton,npcm-wdt.txt new file mode 100644 index 000000000..866a958b8 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/nuvoton,npcm-wdt.txt @@ -0,0 +1,30 @@ +Nuvoton NPCM Watchdog + +Nuvoton NPCM timer module provides five 24-bit timer counters, and a watchdog. +The watchdog supports a pre-timeout interrupt that fires 10ms before the +expiry. + +Required properties: +- compatible : "nuvoton,npcm750-wdt" for NPCM750 (Poleg), or + "nuvoton,wpcm450-wdt" for WPCM450 (Hermon), or + "nuvoton,npcm845-wdt" for NPCM845 (Arbel). +- reg : Offset and length of the register set for the device. +- interrupts : Contain the timer interrupt with flags for + falling edge. + +Required clocking property, have to be one of: +- clocks : phandle of timer reference clock. +- clock-frequency : The frequency in Hz of the clock that drives the NPCM7xx + timer (usually 25000000). + +Optional properties: +- timeout-sec : Contains the watchdog timeout in seconds + +Example: + +timer@f000801c { + compatible = "nuvoton,npcm750-wdt"; + interrupts = <GIC_SPI 47 IRQ_TYPE_LEVEL_HIGH>; + reg = <0xf000801c 0x4>; + clocks = <&clk NPCM7XX_CLK_TIMER>; +}; diff --git a/Documentation/devicetree/bindings/watchdog/omap-wdt.txt b/Documentation/devicetree/bindings/watchdog/omap-wdt.txt new file mode 100644 index 000000000..1fa20e453 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/omap-wdt.txt @@ -0,0 +1,15 @@ +TI Watchdog Timer (WDT) Controller for OMAP + +Required properties: +- compatible : "ti,omap3-wdt" for OMAP3 or "ti,omap4-wdt" for OMAP4 +- ti,hwmods : Name of the hwmod associated to the WDT + +Optional properties: +- timeout-sec : default watchdog timeout in seconds + +Examples: + +wdt2: wdt@4a314000 { + compatible = "ti,omap4-wdt", "ti,omap3-wdt"; + ti,hwmods = "wd_timer2"; +}; diff --git a/Documentation/devicetree/bindings/watchdog/pnx4008-wdt.txt b/Documentation/devicetree/bindings/watchdog/pnx4008-wdt.txt new file mode 100644 index 000000000..4b76bec62 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/pnx4008-wdt.txt @@ -0,0 +1,17 @@ +* NXP PNX watchdog timer + +Required properties: +- compatible: must be "nxp,pnx4008-wdt" +- reg: physical base address of the controller and length of memory mapped + region. + +Optional properties: +- timeout-sec: contains the watchdog timeout in seconds. + +Example: + + watchdog@4003c000 { + compatible = "nxp,pnx4008-wdt"; + reg = <0x4003C000 0x1000>; + timeout-sec = <10>; + }; diff --git a/Documentation/devicetree/bindings/watchdog/qca-ar7130-wdt.txt b/Documentation/devicetree/bindings/watchdog/qca-ar7130-wdt.txt new file mode 100644 index 000000000..7a89e5f85 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/qca-ar7130-wdt.txt @@ -0,0 +1,13 @@ +* Qualcomm Atheros AR7130 Watchdog Timer (WDT) Controller + +Required properties: +- compatible: must be "qca,ar7130-wdt" +- reg: physical base address of the controller and length of memory mapped + region. + +Example: + +wdt@18060008 { + compatible = "qca,ar9330-wdt", "qca,ar7130-wdt"; + reg = <0x18060008 0x8>; +}; diff --git a/Documentation/devicetree/bindings/watchdog/qcom,pm8916-wdt.yaml b/Documentation/devicetree/bindings/watchdog/qcom,pm8916-wdt.yaml new file mode 100644 index 000000000..568eb8480 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/qcom,pm8916-wdt.yaml @@ -0,0 +1,51 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/qcom,pm8916-wdt.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Qualcomm PM8916 watchdog timer controller + +maintainers: + - Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> + +allOf: + - $ref: watchdog.yaml# + +properties: + compatible: + const: qcom,pm8916-wdt + + interrupts: + maxItems: 1 + +required: + - compatible + - interrupts + +unevaluatedProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/irq.h> + #include <dt-bindings/spmi/spmi.h> + + pmic@0 { + compatible = "qcom,pm8916", "qcom,spmi-pmic"; + reg = <0x0 SPMI_USID>; + #address-cells = <1>; + #size-cells = <0>; + + pon@800 { + compatible = "qcom,pm8916-pon"; + reg = <0x800>; + mode-bootloader = <0x2>; + mode-recovery = <0x1>; + + watchdog { + compatible = "qcom,pm8916-wdt"; + interrupts = <0x0 0x8 6 IRQ_TYPE_EDGE_RISING>; + timeout-sec = <60>; + }; + }; + }; diff --git a/Documentation/devicetree/bindings/watchdog/qcom-wdt.yaml b/Documentation/devicetree/bindings/watchdog/qcom-wdt.yaml new file mode 100644 index 000000000..d8ac0be36 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/qcom-wdt.yaml @@ -0,0 +1,62 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/qcom-wdt.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Qualcomm Krait Processor Sub-system (KPSS) Watchdog timer + +maintainers: + - Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org> + +allOf: + - $ref: watchdog.yaml# + +properties: + compatible: + oneOf: + - items: + - enum: + - qcom,apss-wdt-qcs404 + - qcom,apss-wdt-sc7180 + - qcom,apss-wdt-sc7280 + - qcom,apss-wdt-sc8180x + - qcom,apss-wdt-sc8280xp + - qcom,apss-wdt-sdm845 + - qcom,apss-wdt-sdx55 + - qcom,apss-wdt-sdx65 + - qcom,apss-wdt-sm6350 + - qcom,apss-wdt-sm8150 + - qcom,apss-wdt-sm8250 + - const: qcom,kpss-wdt + - items: + - enum: + - qcom,kpss-wdt + - qcom,kpss-timer + - qcom,kpss-wdt-apq8064 + - qcom,kpss-wdt-ipq4019 + - qcom,kpss-wdt-ipq8064 + - qcom,kpss-wdt-msm8960 + - qcom,scss-timer + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + +required: + - compatible + - reg + - clocks + +unevaluatedProperties: false + +examples: + - | + watchdog@208a038 { + compatible = "qcom,kpss-wdt-ipq8064"; + reg = <0x0208a038 0x40>; + clocks = <&sleep_clk>; + timeout-sec = <10>; + }; diff --git a/Documentation/devicetree/bindings/watchdog/realtek,otto-wdt.yaml b/Documentation/devicetree/bindings/watchdog/realtek,otto-wdt.yaml new file mode 100644 index 000000000..099245fe7 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/realtek,otto-wdt.yaml @@ -0,0 +1,92 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/realtek,otto-wdt.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Realtek Otto watchdog timer + +maintainers: + - Sander Vanheule <sander@svanheule.net> + +description: | + The timer has two timeout phases. Both phases have a maximum duration of 32 + prescaled clock ticks, which is ca. 43s with a bus clock of 200MHz. The + minimum duration of each phase is one tick. Each phase can trigger an + interrupt, although the phase 2 interrupt will occur with the system reset. + - Phase 1: During this phase, the WDT can be pinged to reset the timeout. + - Phase 2: Starts after phase 1 has timed out, and only serves to give the + system some time to clean up, or notify others that it's going to reset. + During this phase, pinging the WDT has no effect, and a reset is + unavoidable, unless the WDT is disabled. + +allOf: + - $ref: watchdog.yaml# + +properties: + compatible: + enum: + - realtek,rtl8380-wdt + - realtek,rtl8390-wdt + - realtek,rtl9300-wdt + - realtek,rtl9310-wdt + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + + interrupts: + items: + - description: interrupt specifier for pretimeout + - description: interrupt specifier for timeout + + interrupt-names: + items: + - const: phase1 + - const: phase2 + + realtek,reset-mode: + $ref: /schemas/types.yaml#/definitions/string + description: | + Specify how the system is reset after a timeout. Defaults to "cpu" if + left unspecified. + oneOf: + - description: Reset the entire chip + const: soc + - description: | + Reset the CPU and IPsec engine, but leave other peripherals untouched + const: cpu + - description: | + Reset the execution pointer, but don't actually reset any hardware + const: software + +required: + - compatible + - reg + - clocks + - interrupts + +unevaluatedProperties: false + +dependencies: + interrupts: [ interrupt-names ] + +examples: + - | + watchdog: watchdog@3150 { + compatible = "realtek,rtl8380-wdt"; + reg = <0x3150 0xc>; + + realtek,reset-mode = "soc"; + + clocks = <&lxbus_clock>; + timeout-sec = <20>; + + interrupt-parent = <&rtlintc>; + interrupt-names = "phase1", "phase2"; + interrupts = <19>, <18>; + }; + +... diff --git a/Documentation/devicetree/bindings/watchdog/realtek,rtd119x.txt b/Documentation/devicetree/bindings/watchdog/realtek,rtd119x.txt new file mode 100644 index 000000000..05653054b --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/realtek,rtd119x.txt @@ -0,0 +1,17 @@ +Realtek RTD1295 Watchdog +======================== + +Required properties: + +- compatible : Should be "realtek,rtd1295-watchdog" +- reg : Specifies the physical base address and size of registers +- clocks : Specifies one clock input + + +Example: + + watchdog@98007680 { + compatible = "realtek,rtd1295-watchdog"; + reg = <0x98007680 0x100>; + clocks = <&osc27M>; + }; diff --git a/Documentation/devicetree/bindings/watchdog/renesas,wdt.yaml b/Documentation/devicetree/bindings/watchdog/renesas,wdt.yaml new file mode 100644 index 000000000..26b1815a6 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/renesas,wdt.yaml @@ -0,0 +1,187 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/renesas,wdt.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Renesas Watchdog Timer (WDT) Controller + +maintainers: + - Wolfram Sang <wsa+renesas@sang-engineering.com> + - Geert Uytterhoeven <geert+renesas@glider.be> + +properties: + compatible: + oneOf: + - items: + - enum: + - renesas,r7s72100-wdt # RZ/A1 + - renesas,r7s9210-wdt # RZ/A2 + - const: renesas,rza-wdt # RZ/A + + - items: + - enum: + - renesas,r9a06g032-wdt # RZ/N1D + - const: renesas,rzn1-wdt # RZ/N1 + + - items: + - enum: + - renesas,r9a07g043-wdt # RZ/G2UL + - renesas,r9a07g044-wdt # RZ/G2{L,LC} + - renesas,r9a07g054-wdt # RZ/V2L + - const: renesas,rzg2l-wdt + + - items: + - enum: + - renesas,r9a09g011-wdt # RZ/V2M + - const: renesas,rzv2m-wdt # RZ/V2M + + - items: + - enum: + - renesas,r8a7742-wdt # RZ/G1H + - renesas,r8a7743-wdt # RZ/G1M + - renesas,r8a7744-wdt # RZ/G1N + - renesas,r8a7745-wdt # RZ/G1E + - renesas,r8a77470-wdt # RZ/G1C + - renesas,r8a7790-wdt # R-Car H2 + - renesas,r8a7791-wdt # R-Car M2-W + - renesas,r8a7792-wdt # R-Car V2H + - renesas,r8a7793-wdt # R-Car M2-N + - renesas,r8a7794-wdt # R-Car E2 + - const: renesas,rcar-gen2-wdt # R-Car Gen2 and RZ/G1 + + - items: + - enum: + - renesas,r8a774a1-wdt # RZ/G2M + - renesas,r8a774b1-wdt # RZ/G2N + - renesas,r8a774c0-wdt # RZ/G2E + - renesas,r8a774e1-wdt # RZ/G2H + - renesas,r8a7795-wdt # R-Car H3 + - renesas,r8a7796-wdt # R-Car M3-W + - renesas,r8a77961-wdt # R-Car M3-W+ + - renesas,r8a77965-wdt # R-Car M3-N + - renesas,r8a77970-wdt # R-Car V3M + - renesas,r8a77980-wdt # R-Car V3H + - renesas,r8a77990-wdt # R-Car E3 + - renesas,r8a77995-wdt # R-Car D3 + - const: renesas,rcar-gen3-wdt # R-Car Gen3 and RZ/G2 + + - items: + - enum: + - renesas,r8a779a0-wdt # R-Car V3U + - renesas,r8a779f0-wdt # R-Car S4-8 + - renesas,r8a779g0-wdt # R-Car V4H + - const: renesas,rcar-gen4-wdt # R-Car Gen4 + + reg: + maxItems: 1 + + interrupts: + minItems: 1 + items: + - description: Timeout + - description: Parity error + + interrupt-names: + minItems: 1 + items: + - const: wdt + - const: perrout + + clocks: + minItems: 1 + items: + - description: Register access clock + - description: Main clock + + clock-names: + minItems: 1 + items: + - const: pclk + - const: oscclk + + power-domains: + maxItems: 1 + + resets: + maxItems: 1 + + timeout-sec: true + +required: + - compatible + - reg + - interrupts + - clocks + +allOf: + - $ref: "watchdog.yaml#" + + - if: + not: + properties: + compatible: + contains: + enum: + - renesas,rza-wdt + - renesas,rzn1-wdt + then: + required: + - power-domains + - resets + + - if: + properties: + compatible: + contains: + enum: + - renesas,rzg2l-wdt + - renesas,rzv2m-wdt + then: + properties: + clocks: + minItems: 2 + clock-names: + minItems: 2 + required: + - clock-names + else: + properties: + clocks: + maxItems: 1 + + - if: + properties: + compatible: + contains: + enum: + - renesas,rzg2l-wdt + then: + properties: + interrupts: + minItems: 2 + interrupt-names: + minItems: 2 + required: + - interrupt-names + else: + properties: + interrupts: + maxItems: 1 + +additionalProperties: false + +examples: + - | + #include <dt-bindings/clock/r8a7795-cpg-mssr.h> + #include <dt-bindings/power/r8a7795-sysc.h> + #include <dt-bindings/interrupt-controller/arm-gic.h> + wdt0: watchdog@e6020000 { + compatible = "renesas,r8a7795-wdt", "renesas,rcar-gen3-wdt"; + reg = <0xe6020000 0x0c>; + interrupts = <GIC_SPI 140 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&cpg CPG_MOD 402>; + power-domains = <&sysc R8A7795_PD_ALWAYS_ON>; + resets = <&cpg 402>; + timeout-sec = <60>; + }; diff --git a/Documentation/devicetree/bindings/watchdog/rt2880-wdt.txt b/Documentation/devicetree/bindings/watchdog/rt2880-wdt.txt new file mode 100644 index 000000000..05b95bfa2 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/rt2880-wdt.txt @@ -0,0 +1,18 @@ +Ralink Watchdog Timers + +Required properties: +- compatible: must be "ralink,rt2880-wdt" +- reg: physical base address of the controller and length of the register range + +Optional properties: +- interrupts: Specify the INTC interrupt number + +Example: + + watchdog@120 { + compatible = "ralink,rt2880-wdt"; + reg = <0x120 0x10>; + + interrupt-parent = <&intc>; + interrupts = <1>; + }; diff --git a/Documentation/devicetree/bindings/watchdog/samsung-wdt.yaml b/Documentation/devicetree/bindings/watchdog/samsung-wdt.yaml new file mode 100644 index 000000000..8fb6656ba --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/samsung-wdt.yaml @@ -0,0 +1,117 @@ +# SPDX-License-Identifier: GPL-2.0 +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/samsung-wdt.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Samsung SoC Watchdog Timer Controller + +maintainers: + - Krzysztof Kozlowski <krzk@kernel.org> + +description: |+ + The Samsung's Watchdog controller is used for resuming system operation + after a preset amount of time during which the WDT reset event has not + occurred. + +properties: + compatible: + enum: + - samsung,s3c2410-wdt # for S3C2410 + - samsung,s3c6410-wdt # for S3C6410, S5PV210 and Exynos4 + - samsung,exynos5250-wdt # for Exynos5250 + - samsung,exynos5420-wdt # for Exynos5420 + - samsung,exynos7-wdt # for Exynos7 + - samsung,exynos850-wdt # for Exynos850 + - samsung,exynosautov9-wdt # for Exynosautov9 + + reg: + maxItems: 1 + + clocks: + minItems: 1 + maxItems: 2 + + clock-names: + minItems: 1 + maxItems: 2 + + interrupts: + maxItems: 1 + + samsung,cluster-index: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + Index of CPU cluster on which watchdog is running (in case of Exynos850) + + samsung,syscon-phandle: + $ref: /schemas/types.yaml#/definitions/phandle + description: + Phandle to the PMU system controller node (in case of Exynos5250, + Exynos5420, Exynos7 and Exynos850). + +required: + - compatible + - clocks + - clock-names + - interrupts + - reg + +allOf: + - $ref: watchdog.yaml# + - if: + properties: + compatible: + contains: + enum: + - samsung,exynos5250-wdt + - samsung,exynos5420-wdt + - samsung,exynos7-wdt + - samsung,exynos850-wdt + - samsung,exynosautov9-wdt + then: + required: + - samsung,syscon-phandle + - if: + properties: + compatible: + contains: + enum: + - samsung,exynos850-wdt + - samsung,exynosautov9-wdt + then: + properties: + clocks: + items: + - description: Bus clock, used for register interface + - description: Source clock (driving watchdog counter) + clock-names: + items: + - const: watchdog + - const: watchdog_src + samsung,cluster-index: + enum: [0, 1] + required: + - samsung,cluster-index + else: + properties: + clocks: + items: + - description: Bus clock, which is also a source clock + clock-names: + items: + - const: watchdog + samsung,cluster-index: false + +unevaluatedProperties: false + +examples: + - | + watchdog@101d0000 { + compatible = "samsung,exynos5250-wdt"; + reg = <0x101D0000 0x100>; + interrupts = <0 42 0>; + clocks = <&clock 336>; + clock-names = "watchdog"; + samsung,syscon-phandle = <&pmu_syscon>; + }; diff --git a/Documentation/devicetree/bindings/watchdog/snps,dw-wdt.yaml b/Documentation/devicetree/bindings/watchdog/snps,dw-wdt.yaml new file mode 100644 index 000000000..92df6e453 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/snps,dw-wdt.yaml @@ -0,0 +1,106 @@ +# SPDX-License-Identifier: GPL-2.0-only +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/snps,dw-wdt.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Synopsys Designware Watchdog Timer + +allOf: + - $ref: "watchdog.yaml#" + +maintainers: + - Jamie Iles <jamie@jamieiles.com> + +properties: + compatible: + oneOf: + - const: snps,dw-wdt + - items: + - enum: + - rockchip,px30-wdt + - rockchip,rk3066-wdt + - rockchip,rk3128-wdt + - rockchip,rk3188-wdt + - rockchip,rk3228-wdt + - rockchip,rk3288-wdt + - rockchip,rk3308-wdt + - rockchip,rk3328-wdt + - rockchip,rk3368-wdt + - rockchip,rk3399-wdt + - rockchip,rk3568-wdt + - rockchip,rv1108-wdt + - const: snps,dw-wdt + + reg: + maxItems: 1 + + interrupts: + description: DW Watchdog pre-timeout interrupt + maxItems: 1 + + clocks: + minItems: 1 + items: + - description: Watchdog timer reference clock + - description: APB3 interface clock + + clock-names: + minItems: 1 + items: + - const: tclk + - const: pclk + + resets: + description: Phandle to the DW Watchdog reset lane + maxItems: 1 + + snps,watchdog-tops: + $ref: /schemas/types.yaml#/definitions/uint32-array + description: | + DW APB Watchdog custom timer intervals - Timeout Period ranges (TOPs). + Each TOP is a number loaded into the watchdog counter at the moment of + the timer restart. The counter decrementing happens each tick of the + reference clock. Therefore the TOPs array is equivalent to an array of + the timer expiration intervals supported by the DW APB Watchdog. Note + DW APB Watchdog IP-core might be synthesized with fixed TOP values, + in which case this property is unnecessary with default TOPs utilized. + default: [0x0001000 0x0002000 0x0004000 0x0008000 + 0x0010000 0x0020000 0x0040000 0x0080000 + 0x0100000 0x0200000 0x0400000 0x0800000 + 0x1000000 0x2000000 0x4000000 0x8000000] + minItems: 16 + maxItems: 16 + +unevaluatedProperties: false + +required: + - compatible + - reg + - clocks + +examples: + - | + watchdog@ffd02000 { + compatible = "snps,dw-wdt"; + reg = <0xffd02000 0x1000>; + interrupts = <0 171 4>; + clocks = <&per_base_clk>; + resets = <&wdt_rst>; + }; + + - | + watchdog@ffd02000 { + compatible = "snps,dw-wdt"; + reg = <0xffd02000 0x1000>; + interrupts = <0 171 4>; + clocks = <&per_base_clk>; + clock-names = "tclk"; + snps,watchdog-tops = <0x000000FF 0x000001FF 0x000003FF + 0x000007FF 0x0000FFFF 0x0001FFFF + 0x0003FFFF 0x0007FFFF 0x000FFFFF + 0x001FFFFF 0x003FFFFF 0x007FFFFF + 0x00FFFFFF 0x01FFFFFF 0x03FFFFFF + 0x07FFFFFF>; + }; +... diff --git a/Documentation/devicetree/bindings/watchdog/socionext,uniphier-wdt.yaml b/Documentation/devicetree/bindings/watchdog/socionext,uniphier-wdt.yaml new file mode 100644 index 000000000..90698cfa8 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/socionext,uniphier-wdt.yaml @@ -0,0 +1,36 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/socionext,uniphier-wdt.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Socionext UniPhier watchdog timer + +maintainers: + - Keiji Hayashibara <hayashibara.keiji@socionext.com> + +allOf: + - $ref: "watchdog.yaml#" + +properties: + compatible: + const: socionext,uniphier-wdt + +required: + - compatible + +unevaluatedProperties: false + +examples: + - | + // The UniPhier watchdog should be a subnode of a "syscon" compatible node. + + sysctrl@61840000 { + compatible = "socionext,uniphier-ld11-sysctrl", + "simple-mfd", "syscon"; + reg = <0x61840000 0x10000>; + + watchdog { + compatible = "socionext,uniphier-wdt"; + }; + }; diff --git a/Documentation/devicetree/bindings/watchdog/sprd-wdt.txt b/Documentation/devicetree/bindings/watchdog/sprd-wdt.txt new file mode 100644 index 000000000..aeaf3e0ca --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/sprd-wdt.txt @@ -0,0 +1,19 @@ +Spreadtrum SoCs Watchdog timer + +Required properties: +- compatible : Should be "sprd,sp9860-wdt". +- reg : Specifies base physical address and size of the registers. +- interrupts : Exactly one interrupt specifier. +- timeout-sec : Contain the default watchdog timeout in seconds. +- clock-names : Contain the input clock names. +- clocks : Phandles to input clocks. + +Example: + watchdog: watchdog@40310000 { + compatible = "sprd,sp9860-wdt"; + reg = <0 0x40310000 0 0x1000>; + interrupts = <GIC_SPI 61 IRQ_TYPE_LEVEL_HIGH>; + timeout-sec = <12>; + clock-names = "enable", "rtc_enable"; + clocks = <&clk_aon_apb_gates1 8>, <&clk_aon_apb_rtc_gates 9>; + }; diff --git a/Documentation/devicetree/bindings/watchdog/st,stm32-iwdg.yaml b/Documentation/devicetree/bindings/watchdog/st,stm32-iwdg.yaml new file mode 100644 index 000000000..39736449b --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/st,stm32-iwdg.yaml @@ -0,0 +1,58 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/st,stm32-iwdg.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: STMicroelectronics STM32 Independent WatchDoG (IWDG) bindings + +maintainers: + - Yannick Fertre <yannick.fertre@foss.st.com> + - Christophe Roullier <christophe.roullier@foss.st.com> + +allOf: + - $ref: "watchdog.yaml#" + +properties: + compatible: + enum: + - st,stm32-iwdg + - st,stm32mp1-iwdg + + reg: + maxItems: 1 + + clocks: + items: + - description: Low speed clock + - description: Optional peripheral clock + minItems: 1 + + clock-names: + items: + enum: + - lsi + - pclk + minItems: 1 + maxItems: 2 + +required: + - compatible + - reg + - clocks + - clock-names + +unevaluatedProperties: false + +examples: + - | + #include <dt-bindings/clock/stm32mp1-clks.h> + watchdog@5a002000 { + compatible = "st,stm32mp1-iwdg"; + reg = <0x5a002000 0x400>; + clocks = <&rcc IWDG2>, <&rcc CK_LSI>; + clock-names = "pclk", "lsi"; + timeout-sec = <32>; + }; + +... diff --git a/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt b/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt new file mode 100644 index 000000000..b949039bc --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt @@ -0,0 +1,41 @@ +STMicroelectronics Low Power Controller (LPC) - Watchdog +======================================================== + +LPC currently supports Watchdog OR Real Time Clock OR Clocksource +functionality. + +[See: ../rtc/rtc-st-lpc.txt for RTC options] +[See: ../timer/st,stih407-lpc for Clocksource options] + +Required properties + +- compatible : Should be: "st,stih407-lpc" +- reg : LPC registers base address + size +- interrupts : LPC interrupt line number and associated flags +- clocks : Clock used by LPC device (See: ../clock/clock-bindings.txt) +- st,lpc-mode : The LPC can run either one of three modes: + ST_LPC_MODE_RTC [0] + ST_LPC_MODE_WDT [1] + ST_LPC_MODE_CLKSRC [2] + One (and only one) mode must be selected. + +Required properties [watchdog mode] + +- st,syscfg : Phandle to syscfg node used to enable watchdog and configure + CPU reset type. +- timeout-sec : Watchdog timeout in seconds + +Optional properties [watchdog mode] + +- st,warm-reset : If present reset type will be 'warm' - if not it will be cold + +Example: + lpc@fde05000 { + compatible = "st,stih407-lpc"; + reg = <0xfde05000 0x1000>; + clocks = <&clk_s_d3_flexgen CLK_LPC_0>; + st,syscfg = <&syscfg_core>; + timeout-sec = <120>; + st,lpc-mode = <ST_LPC_MODE_WDT>; + st,warm-reset; + }; diff --git a/Documentation/devicetree/bindings/watchdog/sunplus,sp7021-wdt.yaml b/Documentation/devicetree/bindings/watchdog/sunplus,sp7021-wdt.yaml new file mode 100644 index 000000000..d90271013 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/sunplus,sp7021-wdt.yaml @@ -0,0 +1,47 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +# Copyright (C) Sunplus Co., Ltd. 2021 +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/sunplus,sp7021-wdt.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Sunplus SoCs Watchdog + +maintainers: + - XianTao Hu <xt.hu@cqplus1.com> + +allOf: + - $ref: watchdog.yaml# + +properties: + compatible: + const: sunplus,sp7021-wdt + + reg: + items: + - description: watchdog registers regions + - description: miscellaneous control registers regions + + clocks: + maxItems: 1 + + resets: + maxItems: 1 + +required: + - compatible + - reg + - clocks + - resets + +additionalProperties: false + +examples: + - | + watchdog: watchdog@9c000630 { + compatible = "sunplus,sp7021-wdt"; + reg = <0x9c000630 0x08>, <0x9c000274 0x04>; + clocks = <&clkc 0x24>; + resets = <&rstc 0x14>; + }; +... diff --git a/Documentation/devicetree/bindings/watchdog/ti,rti-wdt.yaml b/Documentation/devicetree/bindings/watchdog/ti,rti-wdt.yaml new file mode 100644 index 000000000..2f3363587 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/ti,rti-wdt.yaml @@ -0,0 +1,61 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/ti,rti-wdt.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Texas Instruments K3 SoC Watchdog Timer + +maintainers: + - Tero Kristo <t-kristo@ti.com> + +description: + The TI K3 SoC watchdog timer is implemented via the RTI (Real Time + Interrupt) IP module. This timer adds a support for windowed watchdog + mode, which will signal an error if it is pinged outside the watchdog + time window, meaning either too early or too late. The error signal + generated can be routed to either interrupt a safety controller or + to directly reset the SoC. + +allOf: + - $ref: "watchdog.yaml#" + +properties: + compatible: + enum: + - ti,j7-rti-wdt + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + + power-domains: + maxItems: 1 + +required: + - compatible + - reg + - clocks + - power-domains + +unevaluatedProperties: false + +examples: + - | + /* + * RTI WDT in main domain on J721e SoC. Assigned clocks are used to + * select the source clock for the watchdog, forcing it to tick with + * a 32kHz clock in this case. + */ + #include <dt-bindings/soc/ti,sci_pm_domain.h> + + watchdog@2200000 { + compatible = "ti,j7-rti-wdt"; + reg = <0x2200000 0x100>; + clocks = <&k3_clks 252 1>; + power-domains = <&k3_pds 252 TI_SCI_PD_EXCLUSIVE>; + assigned-clocks = <&k3_clks 252 1>; + assigned-clock-parents = <&k3_clks 252 5>; + }; diff --git a/Documentation/devicetree/bindings/watchdog/toshiba,visconti-wdt.yaml b/Documentation/devicetree/bindings/watchdog/toshiba,visconti-wdt.yaml new file mode 100644 index 000000000..eba083822 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/toshiba,visconti-wdt.yaml @@ -0,0 +1,50 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +# Copyright 2020 Toshiba Electronic Devices & Storage Corporation +%YAML 1.2 +--- +$id: "http://devicetree.org/schemas/watchdog/toshiba,visconti-wdt.yaml#" +$schema: "http://devicetree.org/meta-schemas/core.yaml#" + +title: Toshiba Visconti SoCs PIUWDT Watchdog timer + +maintainers: + - Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp> + +allOf: + - $ref: watchdog.yaml# + +properties: + compatible: + enum: + - toshiba,visconti-wdt + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + + timeout-sec: true + +required: + - compatible + - reg + - clocks + +additionalProperties: false + +examples: + - | + #include <dt-bindings/clock/toshiba,tmpv770x.h> + + soc { + #address-cells = <2>; + #size-cells = <2>; + + wdt: watchdog@28330000 { + compatible = "toshiba,visconti-wdt"; + reg = <0 0x28330000 0 0x1000>; + timeout-sec = <20>; + clocks = <&pismu TMPV770X_CLK_WDTCLK>; + }; + }; diff --git a/Documentation/devicetree/bindings/watchdog/ts4800-wdt.txt b/Documentation/devicetree/bindings/watchdog/ts4800-wdt.txt new file mode 100644 index 000000000..8f6caad42 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/ts4800-wdt.txt @@ -0,0 +1,25 @@ +Technologic Systems Watchdog + +Required properties: +- compatible: must be "technologic,ts4800-wdt" +- syscon: phandle / integer array that points to the syscon node which + describes the FPGA's syscon registers. + - phandle to FPGA's syscon + - offset to the watchdog register + +Optional property: +- timeout-sec: contains the watchdog timeout in seconds. + +Example: + +syscon: syscon@b0010000 { + compatible = "syscon", "simple-mfd"; + reg = <0xb0010000 0x3d>; + reg-io-width = <2>; + + wdt@e { + compatible = "technologic,ts4800-wdt"; + syscon = <&syscon 0xe>; + timeout-sec = <10>; + }; +} diff --git a/Documentation/devicetree/bindings/watchdog/twl4030-wdt.txt b/Documentation/devicetree/bindings/watchdog/twl4030-wdt.txt new file mode 100644 index 000000000..80a37193c --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/twl4030-wdt.txt @@ -0,0 +1,10 @@ +Device tree bindings for twl4030-wdt driver (TWL4030 watchdog) + +Required properties: + compatible = "ti,twl4030-wdt"; + +Example: + +watchdog { + compatible = "ti,twl4030-wdt"; +}; diff --git a/Documentation/devicetree/bindings/watchdog/watchdog.yaml b/Documentation/devicetree/bindings/watchdog/watchdog.yaml new file mode 100644 index 000000000..e3dfb02f0 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/watchdog.yaml @@ -0,0 +1,27 @@ +# SPDX-License-Identifier: GPL-2.0 +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/watchdog.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Watchdog Generic Bindings + +maintainers: + - Guenter Roeck <linux@roeck-us.net> + - Wim Van Sebroeck <wim@linux-watchdog.org> + +description: | + This document describes generic bindings which can be used to + describe watchdog devices in a device tree. + +properties: + $nodename: + pattern: "^watchdog(@.*|-[0-9a-f])?$" + + timeout-sec: + description: + Contains the watchdog timeout in seconds. + +additionalProperties: true + +... diff --git a/Documentation/devicetree/bindings/watchdog/xlnx,xps-timebase-wdt.yaml b/Documentation/devicetree/bindings/watchdog/xlnx,xps-timebase-wdt.yaml new file mode 100644 index 000000000..493a1c954 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/xlnx,xps-timebase-wdt.yaml @@ -0,0 +1,68 @@ +# SPDX-License-Identifier: GPL-2.0-or-later OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/xlnx,xps-timebase-wdt.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Xilinx AXI/PLB softcore and window Watchdog Timer + +maintainers: + - Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com> + - Srinivas Neeli <srinivas.neeli@xilinx.com> + +description: + The Timebase watchdog timer(WDT) is a free-running 32 bit counter. + WDT uses a dual-expiration architecture. After one expiration of + the timeout interval, an interrupt is generated and the WDT state + bit is set to one in the status register. If the state bit is not + cleared (by writing a one to the state bit) before the next + expiration of the timeout interval, a WDT reset is generated. + +allOf: + - $ref: watchdog.yaml# + +properties: + compatible: + enum: + - xlnx,xps-timebase-wdt-1.01.a + - xlnx,xps-timebase-wdt-1.00.a + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + + clock-frequency: + description: Frequency of clock in Hz + + xlnx,wdt-interval: + $ref: /schemas/types.yaml#/definitions/uint32 + description: Watchdog timeout interval + minimum: 8 + maximum: 32 + + xlnx,wdt-enable-once: + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [0, 1] + description: If watchdog is configured as enable once, + then the watchdog cannot be disabled after + it has been enabled. + +required: + - compatible + - reg + +unevaluatedProperties: false + +examples: + - | + watchdog@40100000 { + compatible = "xlnx,xps-timebase-wdt-1.00.a"; + reg = <0x40100000 0x1000>; + clock-frequency = <50000000>; + clocks = <&clkc 15>; + xlnx,wdt-enable-once = <0x0>; + xlnx,wdt-interval = <0x1b>; + }; +... diff --git a/Documentation/devicetree/bindings/watchdog/zii,rave-sp-wdt.txt b/Documentation/devicetree/bindings/watchdog/zii,rave-sp-wdt.txt new file mode 100644 index 000000000..3de96186e --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/zii,rave-sp-wdt.txt @@ -0,0 +1,39 @@ +Zodiac Inflight Innovations RAVE Supervisory Processor Watchdog Bindings + +RAVE SP watchdog device is a "MFD cell" device corresponding to +watchdog functionality of RAVE Supervisory Processor. It is expected +that its Device Tree node is specified as a child of the node +corresponding to the parent RAVE SP device (as documented in +Documentation/devicetree/bindings/mfd/zii,rave-sp.txt) + +Required properties: + +- compatible: Depending on wire protocol implemented by RAVE SP + firmware, should be one of: + - "zii,rave-sp-watchdog" + - "zii,rave-sp-watchdog-legacy" + +Optional properties: + +- wdt-timeout: Two byte nvmem cell specified as per + Documentation/devicetree/bindings/nvmem/nvmem.txt + +Example: + + rave-sp { + compatible = "zii,rave-sp-rdu1"; + current-speed = <38400>; + + eeprom { + wdt_timeout: wdt-timeout@8E { + reg = <0x8E 2>; + }; + }; + + watchdog { + compatible = "zii,rave-sp-watchdog"; + nvmem-cells = <&wdt_timeout>; + nvmem-cell-names = "wdt-timeout"; + }; + } + diff --git a/Documentation/devicetree/bindings/watchdog/ziirave-wdt.txt b/Documentation/devicetree/bindings/watchdog/ziirave-wdt.txt new file mode 100644 index 000000000..3d878184e --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/ziirave-wdt.txt @@ -0,0 +1,19 @@ +Zodiac RAVE Watchdog Timer + +Required properties: +- compatible: must be "zii,rave-wdt" +- reg: i2c slave address of device, usually 0x38 + +Optional Properties: +- timeout-sec: Watchdog timeout value in seconds. +- reset-duration-ms: Duration of the pulse generated when the watchdog times + out. Value in milliseconds. + +Example: + + watchdog@38 { + compatible = "zii,rave-wdt"; + reg = <0x38>; + timeout-sec = <30>; + reset-duration-ms = <30>; + }; |