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Diffstat (limited to 'Documentation/devicetree/bindings/watchdog')
54 files changed, 1313 insertions, 0 deletions
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/arm,sp805.txt b/Documentation/devicetree/bindings/watchdog/arm,sp805.txt new file mode 100644 index 000000000..bee6f1f0e --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/arm,sp805.txt @@ -0,0 +1,32 @@ +ARM AMBA Primecell SP805 Watchdog + +SP805 WDT is a ARM Primecell Peripheral and has a standard-id register that +can be used to identify the peripheral type, vendor, and revision. +This value can be used for driver matching. + +As SP805 WDT is a primecell IP, it follows the base bindings specified in +'arm/primecell.txt' + +Required properties: +- compatible: Should be "arm,sp805" & "arm,primecell" +- reg: Should contain location and length for watchdog timer register +- clocks: Clocks driving the watchdog timer hardware. This list should be + 2 clocks. With 2 clocks, the order is wdog_clk, apb_pclk + wdog_clk can be equal to or be a sub-multiple of the apb_pclk + frequency +- clock-names: Shall be "wdog_clk" for first clock and "apb_pclk" for the + second one + +Optional properties: +- interrupts: Should specify WDT interrupt number +- timeout-sec: Should specify default WDT timeout in seconds. If unset, the + default timeout is determined by the driver + +Example: + 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/aspeed-wdt.txt b/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt new file mode 100644 index 000000000..c5077a1f5 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt @@ -0,0 +1,56 @@ +Aspeed Watchdog Timer + +Required properties: + - compatible: must be one of: + - "aspeed,ast2400-wdt" + - "aspeed,ast2500-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 specfied 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-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/atmel-sama5d4-wdt.txt b/Documentation/devicetree/bindings/watchdog/atmel-sama5d4-wdt.txt new file mode 100644 index 000000000..4fec1e372 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/atmel-sama5d4-wdt.txt @@ -0,0 +1,34 @@ +* Atmel SAMA5D4 Watchdog Timer (WDT) Controller + +Required properties: +- compatible: "atmel,sama5d4-wdt" +- reg: base physical address and length of memory mapped region. + +Optional properties: +- timeout-sec: watchdog timeout value (in seconds). +- interrupts: interrupt number to the CPU. +- atmel,watchdog-type: should be "hardware" or "software". + "hardware": enable watchdog fault reset. A watchdog fault triggers + watchdog reset. + "software": enable watchdog fault interrupt. A watchdog fault asserts + watchdog interrupt. +- atmel,idle-halt: 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: present if you want to stop the watchdog when the CPU is + in debug state. + +Example: + 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-wdt.txt b/Documentation/devicetree/bindings/watchdog/atmel-wdt.txt new file mode 100644 index 000000000..711a880b3 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/atmel-wdt.txt @@ -0,0 +1,51 @@ +* Atmel Watchdog Timers + +** at91sam9-wdt + +Required properties: +- compatible: must be "atmel,at91sam9260-wdt". +- reg: physical base address of the controller and length of memory mapped + region. +- clocks: phandle to input clock. + +Optional properties: +- timeout-sec: contains the watchdog timeout in seconds. +- interrupts : Should contain WDT interrupt. +- atmel,max-heartbeat-sec : 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. +- atmel,min-heartbeat-sec : 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. +- atmel,watchdog-type : Should be "hardware" or "software". Hardware watchdog + use the at91 watchdog reset. Software watchdog use the watchdog + interrupt to trigger a software reset. +- atmel,reset-type : Should be "proc" or "all". + "all" : assert peripherals and processor reset signals + "proc" : assert the processor reset signal + This is valid only when using "hardware" watchdog. +- atmel,disable : Should be present if you want to disable the watchdog. +- atmel,idle-halt : 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 stop working while it is in idle state, which is probably + not what you want. +- atmel,dbg-halt : Should be present if you want to stop the watchdog when + entering debug state. + +Example: + 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/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.txt b/Documentation/devicetree/bindings/watchdog/brcm,bcm7038-wdt.txt new file mode 100644 index 000000000..84122270b --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/brcm,bcm7038-wdt.txt @@ -0,0 +1,19 @@ +BCM7038 Watchdog timer + +Required properties: + +- compatible : should be "brcm,bcm7038-wdt" +- reg : Specifies base physical address and size of the registers. + +Optional properties: + +- clocks: The clock running the watchdog. If no clock is found the + driver will default to 27000000 Hz. + +Example: + +watchdog@f040a7e8 { + compatible = "brcm,bcm7038-wdt"; + clocks = <&upg_fixed>; + reg = <0xf040a7e8 0x16>; +}; 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..b935b526d --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/da9062-wdt.txt @@ -0,0 +1,23 @@ +* 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" + +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..e60b9a13b --- /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 - http://www.ti.com/lit/ug/spruer5b/spruer5b.pdf +Keystone - http://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/dw_wdt.txt b/Documentation/devicetree/bindings/watchdog/dw_wdt.txt new file mode 100644 index 000000000..eb0914420 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/dw_wdt.txt @@ -0,0 +1,24 @@ +Synopsys Designware Watchdog Timer + +Required Properties: + +- compatible : Should contain "snps,dw-wdt" +- reg : Base address and size of the watchdog timer registers. +- clocks : phandle + clock-specifier for the clock that drives the + watchdog timer. + +Optional Properties: + +- interrupts : The interrupt used for the watchdog timeout warning. +- resets : phandle pointing to the system reset controller with + line index for the watchdog. + +Example: + + watchdog0: wd@ffd02000 { + compatible = "snps,dw-wdt"; + reg = <0xffd02000 0x1000>; + interrupts = <0 171 4>; + clocks = <&per_base_clk>; + resets = <&rst WDT0_RESET>; + }; diff --git a/Documentation/devicetree/bindings/watchdog/faraday,ftwdt010.txt b/Documentation/devicetree/bindings/watchdog/faraday,ftwdt010.txt new file mode 100644 index 000000000..9ecdb502e --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/faraday,ftwdt010.txt @@ -0,0 +1,22 @@ +Faraday Technology FTWDT010 watchdog + +This is an IP part from Faraday Technology found in the Gemini +SoCs and others. + +Required properties: +- compatible : must be one of + "faraday,ftwdt010" + "cortina,gemini-watchdog", "faraday,ftwdt010" +- reg : shall contain base register location and length +- interrupts : shall contain the interrupt for the watchdog + +Optional properties: +- timeout-sec : the default watchdog timeout in seconds. + +Example: + +watchdog@41000000 { + compatible = "faraday,ftwdt010"; + reg = <0x41000000 0x1000>; + interrupts = <3 IRQ_TYPE_LEVEL_HIGH>; +}; diff --git a/Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.txt b/Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.txt new file mode 100644 index 000000000..adc6b76fc --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.txt @@ -0,0 +1,24 @@ +* Freescale i.MX Watchdog Timer (WDT) Controller + +Required properties: +- compatible : Should be "fsl,<soc>-wdt" +- reg : Should contain WDT registers location and length +- interrupts : Should contain WDT interrupt + +Optional properties: +- big-endian: If present the watchdog device's registers are implemented + in big endian mode, otherwise in native mode(same with CPU), for more + detail please see: Documentation/devicetree/bindings/regmap/regmap.txt. +- fsl,ext-reset-output: If present the watchdog device is configured to + assert its external reset (WDOG_B) instead of issuing a software reset. +- timeout-sec : Contains the watchdog timeout in seconds + +Examples: + +wdt@73f98000 { + compatible = "fsl,imx51-wdt", "fsl,imx21-wdt"; + reg = <0x73f98000 0x4000>; + interrupts = <58>; + big-endian; + timeout-sec = <20>; +}; 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/ingenic,jz4740-wdt.txt b/Documentation/devicetree/bindings/watchdog/ingenic,jz4740-wdt.txt new file mode 100644 index 000000000..ce1cb72d5 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/ingenic,jz4740-wdt.txt @@ -0,0 +1,17 @@ +Ingenic Watchdog Timer (WDT) Controller for JZ4740 & JZ4780 + +Required properties: +compatible: "ingenic,jz4740-watchdog" or "ingenic,jz4780-watchdog" +reg: Register address and length for watchdog registers +clocks: phandle to the RTC clock +clock-names: should be "rtc" + +Example: + +watchdog: jz4740-watchdog@10002000 { + compatible = "ingenic,jz4740-watchdog"; + reg = <0x10002000 0x10>; + + clocks = <&cgu JZ4740_CLK_RTC>; + clock-names = "rtc"; +}; 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/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-gxbb-wdt.txt b/Documentation/devicetree/bindings/watchdog/meson-gxbb-wdt.txt new file mode 100644 index 000000000..c7fe36fa7 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/meson-gxbb-wdt.txt @@ -0,0 +1,16 @@ +Meson GXBB SoCs Watchdog timer + +Required properties: + +- compatible : should be "amlogic,meson-gxbb-wdt" +- reg : Specifies base physical address and size of the registers. +- clocks : Should be a phandle to the Watchdog clock source, for GXBB the xtal + is the default clock source. + +Example: + +wdt: watchdog@98d0 { + compatible = "amlogic,meson-gxbb-wdt"; + reg = <0 0x98d0 0x0 0x10>; + clocks = <&xtal>; +}; 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/mt7621-wdt.txt b/Documentation/devicetree/bindings/watchdog/mt7621-wdt.txt new file mode 100644 index 000000000..c15ef0ef6 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/mt7621-wdt.txt @@ -0,0 +1,12 @@ +Ralink Watchdog Timers + +Required properties: +- compatible: must be "mediatek,mt7621-wdt" +- reg: physical base address of the controller and length of the register range + +Example: + + watchdog@100 { + compatible = "mediatek,mt7621-wdt"; + reg = <0x100 0x10>; + }; diff --git a/Documentation/devicetree/bindings/watchdog/mtk-wdt.txt b/Documentation/devicetree/bindings/watchdog/mtk-wdt.txt new file mode 100644 index 000000000..859dee167 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/mtk-wdt.txt @@ -0,0 +1,23 @@ +Mediatek SoCs Watchdog timer + +Required properties: + +- compatible should contain: + "mediatek,mt2701-wdt", "mediatek,mt6589-wdt": for MT2701 + "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 + +- reg : Specifies base physical address and size of the registers. + +Optional properties: +- timeout-sec: contains the watchdog timeout in seconds. + +Example: + +wdt: watchdog@10000000 { + compatible = "mediatek,mt6589-wdt"; + reg = <0x10000000 0x18>; + timeout-sec = <10>; +}; 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..6d593003c --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/nuvoton,npcm-wdt.txt @@ -0,0 +1,28 @@ +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). +- 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/of-xilinx-wdt.txt b/Documentation/devicetree/bindings/watchdog/of-xilinx-wdt.txt new file mode 100644 index 000000000..c6ae9c9d5 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/of-xilinx-wdt.txt @@ -0,0 +1,26 @@ +Xilinx AXI/PLB soft-core watchdog Device Tree Bindings +--------------------------------------------------------- + +Required properties: +- compatible : Should be "xlnx,xps-timebase-wdt-1.00.a" or + "xlnx,xps-timebase-wdt-1.01.a". +- reg : Physical base address and size + +Optional properties: +- clocks : Input clock specifier. Refer to common clock + bindings. +- clock-frequency : Frequency of clock in Hz +- xlnx,wdt-enable-once : 0 - Watchdog can be restarted + 1 - Watchdog can be enabled just once +- xlnx,wdt-interval : Watchdog timeout interval in 2^<val> clock cycles, + <val> is integer from 8 to 31. + +Example: +axi-timebase-wdt@40100000 { + clock-frequency = <50000000>; + compatible = "xlnx,xps-timebase-wdt-1.00.a"; + clocks = <&clkc 15>; + reg = <0x40100000 0x10000>; + xlnx,wdt-enable-once = <0x0>; + xlnx,wdt-interval = <0x1b>; +} ; 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-wdt.txt b/Documentation/devicetree/bindings/watchdog/qcom-wdt.txt new file mode 100644 index 000000000..41aeaa2ff --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/qcom-wdt.txt @@ -0,0 +1,28 @@ +Qualcomm Krait Processor Sub-system (KPSS) Watchdog +--------------------------------------------------- + +Required properties : +- compatible : shall contain only one of the following: + + "qcom,kpss-wdt-msm8960" + "qcom,kpss-wdt-apq8064" + "qcom,kpss-wdt-ipq8064" + "qcom,kpss-wdt-ipq4019" + "qcom,kpss-timer" + "qcom,scss-timer" + "qcom,kpss-wdt" + +- reg : shall contain base register location and length +- clocks : shall contain the input clock + +Optional properties : +- timeout-sec : shall contain the default watchdog timeout in seconds, + if unset, the default timeout is 30 seconds + +Example: + watchdog@208a038 { + compatible = "qcom,kpss-wdt-ipq8064"; + reg = <0x0208a038 0x40>; + clocks = <&sleep_clk>; + timeout-sec = <10>; + }; 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.txt b/Documentation/devicetree/bindings/watchdog/renesas-wdt.txt new file mode 100644 index 000000000..9407212a8 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/renesas-wdt.txt @@ -0,0 +1,44 @@ +Renesas Watchdog Timer (WDT) Controller + +Required properties: + - compatible : Must be "renesas,<soctype>-wdt", followed by a generic + fallback compatible string when compatible with the generic + version. + Examples with soctypes are: + - "renesas,r8a7743-wdt" (RZ/G1M) + - "renesas,r8a7745-wdt" (RZ/G1E) + - "renesas,r8a774a1-wdt" (RZ/G2M) + - "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) + - "renesas,r8a7795-wdt" (R-Car H3) + - "renesas,r8a7796-wdt" (R-Car M3-W) + - "renesas,r8a77965-wdt" (R-Car M3-N) + - "renesas,r8a77970-wdt" (R-Car V3M) + - "renesas,r8a77990-wdt" (R-Car E3) + - "renesas,r8a77995-wdt" (R-Car D3) + - "renesas,r7s72100-wdt" (RZ/A1) + The generic compatible string must be: + - "renesas,rza-wdt" for RZ/A + - "renesas,rcar-gen2-wdt" for R-Car Gen2 and RZ/G1 + - "renesas,rcar-gen3-wdt" for R-Car Gen3 and RZ/G2 + +- reg : Should contain WDT registers location and length +- clocks : the clock feeding the watchdog timer. + +Optional properties: +- timeout-sec : Contains the watchdog timeout in seconds +- power-domains : the power domain the WDT belongs to +- interrupts: Some WDTs have an interrupt when used in interval timer mode + +Examples: + + wdt0: watchdog@e6020000 { + compatible = "renesas,r8a7795-wdt", "renesas,rcar-gen3-wdt"; + reg = <0 0xe6020000 0 0x0c>; + clocks = <&cpg CPG_MOD 402>; + power-domains = <&cpg>; + 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.txt b/Documentation/devicetree/bindings/watchdog/samsung-wdt.txt new file mode 100644 index 000000000..46dcb48e7 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/samsung-wdt.txt @@ -0,0 +1,35 @@ +* Samsung's Watchdog Timer Controller + +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. + +Required properties: +- compatible : should be one among the following + - "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 + +- reg : base physical address of the controller and length of memory mapped + region. +- interrupts : interrupt number to the cpu. +- samsung,syscon-phandle : reference to syscon node (This property required only + in case of compatible being "samsung,exynos5250-wdt" or "samsung,exynos5420-wdt". + In case of Exynos5250 and 5420 this property points to syscon node holding the PMU + base address) + +Optional properties: +- timeout-sec : contains the watchdog timeout in seconds. + +Example: + +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/sbsa-gwdt.txt b/Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt new file mode 100644 index 000000000..6f2d5f919 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt @@ -0,0 +1,31 @@ +* SBSA (Server Base System Architecture) Generic Watchdog + +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) + +Required properties: +- compatible: Should at least contain "arm,sbsa-gwdt". + +- reg: Each entry specifies the base physical address of a register frame + and the length of that frame; currently, two frames must be defined, + in this order: + 1: Watchdog control frame; + 2: Refresh frame. + +- interrupts: Should contain the Watchdog Signal 0 (WS0) SPI (Shared + Peripheral Interrupt) number of SBSA Generic Watchdog. + +Optional properties +- timeout-sec: Watchdog timeout values (in seconds). + +Example for FVP Foundation Model v8: + +watchdog@2a440000 { + compatible = "arm,sbsa-gwdt"; + reg = <0x0 0x2a440000 0 0x1000>, + <0x0 0x2a450000 0 0x1000>; + interrupts = <0 27 4>; + timeout-sec = <30>; +}; diff --git a/Documentation/devicetree/bindings/watchdog/sigma,smp8642-wdt.txt b/Documentation/devicetree/bindings/watchdog/sigma,smp8642-wdt.txt new file mode 100644 index 000000000..5b7ec2c70 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/sigma,smp8642-wdt.txt @@ -0,0 +1,18 @@ +Sigma Designs SMP86xx/SMP87xx watchdog + +Required properties: +- compatible: Should be "sigma,smp8642-wdt" +- reg: Specifies the physical address region +- clocks: Should be a phandle to the clock + +Optional properties: +- timeout-sec: watchdog timeout in seconds + +Example: + +watchdog@1fd00 { + compatible = "sigma,smp8642-wdt"; + reg = <0x1fd00 8>; + clocks = <&xtal_in_clk>; + timeout-sec = <30>; +}; diff --git a/Documentation/devicetree/bindings/watchdog/sirfsoc_wdt.txt b/Documentation/devicetree/bindings/watchdog/sirfsoc_wdt.txt new file mode 100644 index 000000000..0dce5e310 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/sirfsoc_wdt.txt @@ -0,0 +1,18 @@ +SiRFSoC Timer and Watchdog Timer(WDT) Controller + +Required properties: +- compatible: "sirf,prima2-tick" +- reg: Address range of tick timer/WDT register set +- interrupts: interrupt number to the cpu + +Optional properties: +- timeout-sec : Contains the watchdog timeout in seconds + +Example: + +timer@b0020000 { + compatible = "sirf,prima2-tick"; + reg = <0xb0020000 0x1000>; + interrupts = <0>; + timeout-sec = <30>; +}; 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.txt b/Documentation/devicetree/bindings/watchdog/st,stm32-iwdg.txt new file mode 100644 index 000000000..d8f4430b0 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/st,stm32-iwdg.txt @@ -0,0 +1,26 @@ +STM32 Independent WatchDoG (IWDG) +--------------------------------- + +Required properties: +- compatible: Should be either: + - "st,stm32-iwdg" + - "st,stm32mp1-iwdg" +- reg: Physical base address and length of the registers set for the device +- clocks: Reference to the clock entry lsi. Additional pclk clock entry + is required only for st,stm32mp1-iwdg. +- clock-names: Name of the clocks used. + "lsi" for st,stm32-iwdg + "lsi", "pclk" for st,stm32mp1-iwdg + +Optional Properties: +- timeout-sec: Watchdog timeout value in seconds. + +Example: + +iwdg: watchdog@40003000 { + compatible = "st,stm32-iwdg"; + reg = <0x40003000 0x400>; + clocks = <&clk_lsi>; + clock-names = "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/stericsson-coh901327.txt b/Documentation/devicetree/bindings/watchdog/stericsson-coh901327.txt new file mode 100644 index 000000000..8ffb88e39 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/stericsson-coh901327.txt @@ -0,0 +1,19 @@ +ST-Ericsson COH 901 327 Watchdog timer + +Required properties: +- compatible: must be "stericsson,coh901327". +- reg: physical base address of the controller and length of memory mapped + region. +- interrupts: the interrupt used for the watchdog timeout warning. + +Optional properties: +- timeout-sec: contains the watchdog timeout in seconds. + +Example: + +watchdog: watchdog@c0012000 { + compatible = "stericsson,coh901327"; + reg = <0xc0012000 0x1000>; + interrupts = <3>; + timeout-sec = <60>; +}; diff --git a/Documentation/devicetree/bindings/watchdog/sunxi-wdt.txt b/Documentation/devicetree/bindings/watchdog/sunxi-wdt.txt new file mode 100644 index 000000000..ed11ce0ac --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/sunxi-wdt.txt @@ -0,0 +1,20 @@ +Allwinner SoCs Watchdog timer + +Required properties: + +- compatible : should be one of + "allwinner,sun4i-a10-wdt" + "allwinner,sun6i-a31-wdt" + "allwinner,sun50i-a64-wdt","allwinner,sun6i-a31-wdt" +- reg : Specifies base physical address and size of the registers. + +Optional properties: +- timeout-sec : Contains the watchdog timeout in seconds + +Example: + +wdt: watchdog@1c20c90 { + compatible = "allwinner,sun4i-a10-wdt"; + reg = <0x01c20c90 0x10>; + timeout-sec = <10>; +}; 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/uniphier-wdt.txt b/Documentation/devicetree/bindings/watchdog/uniphier-wdt.txt new file mode 100644 index 000000000..bf6337546 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/uniphier-wdt.txt @@ -0,0 +1,20 @@ +UniPhier watchdog timer controller + +This UniPhier watchdog timer controller must be under sysctrl node. + +Required properties: +- compatible: should be "socionext,uniphier-wdt" + +Example: + + sysctrl@61840000 { + compatible = "socionext,uniphier-ld11-sysctrl", + "simple-mfd", "syscon"; + reg = <0x61840000 0x4000>; + + watchdog { + compatible = "socionext,uniphier-wdt"; + } + + other nodes ... + }; 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>; + }; diff --git a/Documentation/devicetree/bindings/watchdog/zte,zx2967-wdt.txt b/Documentation/devicetree/bindings/watchdog/zte,zx2967-wdt.txt new file mode 100644 index 000000000..06ce67766 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/zte,zx2967-wdt.txt @@ -0,0 +1,32 @@ +ZTE zx2967 Watchdog timer + +Required properties: + +- compatible : should be one of the following. + * zte,zx296718-wdt +- reg : Specifies base physical address and size of the registers. +- clocks : Pairs of phandle and specifier referencing the controller's clocks. +- resets : Reference to the reset controller controlling the watchdog + controller. + +Optional properties: + +- timeout-sec : Contains the watchdog timeout in seconds. +- zte,wdt-reset-sysctrl : Directs how to reset system by the watchdog. + if we don't want to restart system when watchdog been triggered, + it's not required, vice versa. + It should include following fields. + * phandle of aon-sysctrl. + * offset of register that be written, should be 0xb0. + * configure value that be written to aon-sysctrl. + * bit mask, corresponding bits will be affected. + +Example: + +wdt: watchdog@1465000 { + compatible = "zte,zx296718-wdt"; + reg = <0x1465000 0x1000>; + clocks = <&topcrm WDT_WCLK>; + resets = <&toprst 35>; + zte,wdt-reset-sysctrl = <&aon_sysctrl 0xb0 1 0x115>; +}; |