watchdog: bindings: Provide ST bindings for ST's LPC Watchdog device
On current ST platforms the LPC controls a number of functions including Watchdog and Real Time Clock. This patch provides the bindings used to configure LPC in Watchdog mode. Acked-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Lee Jones <lee.jones@linaro.org>
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Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
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Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
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STMicroelectronics Low Power Controller (LPC) - Watchdog
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========================================================
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LPC currently supports Watchdog OR Real Time Clock functionality.
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[See: ../rtc/rtc-st-lpc.txt for RTC options]
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Required properties
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- compatible : Must be one of: "st,stih407-lpc" "st,stih416-lpc"
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"st,stih415-lpc" "st,stid127-lpc"
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- reg : LPC registers base address + size
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- interrupts : LPC interrupt line number and associated flags
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- clocks : Clock used by LPC device (See: ../clock/clock-bindings.txt)
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- st,lpc-mode : The LPC can run either one of two modes ST_LPC_MODE_RTC [0] or
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ST_LPC_MODE_WDT [1]. One (and only one) mode must be
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selected.
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Required properties [watchdog mode]
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- st,syscfg : Phandle to syscfg node used to enable watchdog and configure
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CPU reset type.
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- timeout-sec : Watchdog timeout in seconds
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Optional properties [watchdog mode]
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- st,warm-reset : If present reset type will be 'warm' - if not it will be cold
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Example:
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lpc@fde05000 {
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compatible = "st,stih407-lpc";
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reg = <0xfde05000 0x1000>;
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clocks = <&clk_s_d3_flexgen CLK_LPC_0>;
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st,syscfg = <&syscfg_core>;
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timeout-sec = <120>;
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st,lpc-mode = <ST_LPC_MODE_WDT>;
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st,warm-reset;
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};
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