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author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-01-30 03:57:43 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-01-30 03:57:43 (GMT) |
commit | 17c7f85460d6b0e2bd11a736683bd81c4388474f (patch) | |
tree | 44a50a722b7a3de27bc4943f52fdb0fee336dfb5 /Documentation/devicetree | |
parent | f7a6ad9fa24e4511a143e2b7b8a0d55864fe2edf (diff) | |
parent | ea3d4011a871e1802e201086195c61e6dbeaf6d5 (diff) | |
download | linux-17c7f85460d6b0e2bd11a736683bd81c4388474f.tar.xz |
Merge git://www.linux-watchdog.org/linux-watchdog
Pull watchdog updates from Wim Van Sebroeck:
- new driver for bcm281xx watchdog device
- new driver for gpio based watchdog devices
- remove DEFINE_PCI_DEVICE_TABLE macro for watchdog device drivers
- conversion of davinci_wdt and mpc8xxx_wdt to watchdog core
- improvements on davinci_wdt, at91/dt, at91sam9_wdt and s3c2410_wdt
- Auto-detect IO address and expand supported chips on w836* super-I/O
chipsets
- core: Make dt "timeout-sec" property work on drivers w/out min/max
- fix Kconfig dependencies
- sirf: Remove redundant of_match_ptr helper
- mach-moxart: add restart handler
- hpwdt patch to display better panic information
- imx2_wdt: disable watchdog timer during low power mode
* git://www.linux-watchdog.org/linux-watchdog: (31 commits)
watchdog: w83627hf_wdt: Reset watchdog trigger during initialization
watchdog: w83627hf: Add support for W83697HF and W83697UG
watchdog: w83627hf: Auto-detect IO address and supported chips
watchdog: at91sam9_wdt: increase security margin on watchdog counter reset
watchdog: at91sam9_wdt: avoid spurious watchdog reset during init
watchdog: at91sam9_wdt: fix secs_to_ticks
ARM: at91/dt: add watchdog properties to kizbox board
ARM: at91/dt: add sam9 watchdog default options to SoCs
watchdog: at91sam9_wdt: update device tree doc
watchdog: at91sam9_wdt: better watchdog support
watchdog: sp805_wdt depends also on ARM64
watchdog: mach-moxart: add restart handler
watchdog: mpc8xxx_wdt convert to watchdog core
watchdog: sirf: Remove redundant of_match_ptr helper
watchdog: hpwdt patch to display informative string
watchdog: dw_wdt: remove build dependencies
watchdog: imx2_wdt: disable watchdog timer during low power mode
watchdog: s3c2410_wdt: Report when the watchdog reset the system
watchdog: s3c2410_wdt: use syscon regmap interface to configure pmu register
watchdog: s3c2410_wdt: Handle rounding a little better for timeout
...
Diffstat (limited to 'Documentation/devicetree')
4 files changed, 85 insertions, 5 deletions
diff --git a/Documentation/devicetree/bindings/watchdog/atmel-wdt.txt b/Documentation/devicetree/bindings/watchdog/atmel-wdt.txt index fcdd48f..f90e294 100644 --- a/Documentation/devicetree/bindings/watchdog/atmel-wdt.txt +++ b/Documentation/devicetree/bindings/watchdog/atmel-wdt.txt @@ -9,11 +9,37 @@ Required properties: 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. +- 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>; - timeout-sec = <10>; + interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>; + 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>; + status = "okay"; }; diff --git a/Documentation/devicetree/bindings/watchdog/davinci-wdt.txt b/Documentation/devicetree/bindings/watchdog/davinci-wdt.txt index 75558cc..e60b9a1 100644 --- a/Documentation/devicetree/bindings/watchdog/davinci-wdt.txt +++ b/Documentation/devicetree/bindings/watchdog/davinci-wdt.txt @@ -1,12 +1,24 @@ -DaVinci Watchdog Timer (WDT) Controller +Texas Instruments DaVinci/Keystone Watchdog Timer (WDT) Controller Required properties: -- compatible : Should be "ti,davinci-wdt" +- 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/gpio-wdt.txt b/Documentation/devicetree/bindings/watchdog/gpio-wdt.txt new file mode 100644 index 0000000..37afec1 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/gpio-wdt.txt @@ -0,0 +1,23 @@ +* 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). + +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/samsung-wdt.txt b/Documentation/devicetree/bindings/watchdog/samsung-wdt.txt index 2aa486c..cfff375 100644 --- a/Documentation/devicetree/bindings/watchdog/samsung-wdt.txt +++ b/Documentation/devicetree/bindings/watchdog/samsung-wdt.txt @@ -5,10 +5,29 @@ after a preset amount of time during which the WDT reset event has not occurred. Required properties: -- compatible : should be "samsung,s3c2410-wdt" +- compatible : should be one among the following + (a) "samsung,s3c2410-wdt" for Exynos4 and previous SoCs + (b) "samsung,exynos5250-wdt" for Exynos5250 + (c) "samsung,exynos5420-wdt" for Exynos5420 + - 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>; +}; |