diff options
Diffstat (limited to 'Documentation/devicetree/bindings/watchdog/arm,sp805.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/watchdog/arm,sp805.txt | 29 |
1 files changed, 22 insertions, 7 deletions
diff --git a/Documentation/devicetree/bindings/watchdog/arm,sp805.txt b/Documentation/devicetree/bindings/watchdog/arm,sp805.txt index ca99d64e6211..bee6f1f0e41b 100644 --- a/Documentation/devicetree/bindings/watchdog/arm,sp805.txt +++ b/Documentation/devicetree/bindings/watchdog/arm,sp805.txt @@ -1,17 +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. -- interrupts: Should contain the list of watchdog timer interrupts. -- clocks: clocks driving the watchdog timer hardware. This list should be 2 - clocks. With 2 clocks, the order is wdogclk clock, apb_pclk. +- 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 = <&apb_pclk>,<&apb_pclk>; - clock-names = "wdogclk", "apb_pclk"; + clocks = <&wdt_clk>, <&apb_pclk>; + clock-names = "wdog_clk", "apb_pclk"; }; |