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author | Lee Jones <lee.jones@linaro.org> | 2015-04-09 15:47:30 +0100 |
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committer | Wim Van Sebroeck <wim@iguana.be> | 2015-06-22 15:53:50 +0200 |
commit | 6f48fdf3bb86a173655502f178f6972291c2c0c5 (patch) | |
tree | ea1707cdd398d44500a34e29830b606a814339f9 /Documentation | |
parent | 97faf05aa63683d288423230b26bb57c781b2edd (diff) | |
download | linux-6f48fdf3bb86a173655502f178f6972291c2c0c5.tar.gz linux-6f48fdf3bb86a173655502f178f6972291c2c0c5.tar.bz2 linux-6f48fdf3bb86a173655502f178f6972291c2c0c5.zip |
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.
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt | 38 |
1 files changed, 38 insertions, 0 deletions
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 000000000000..388c88a01222 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt @@ -0,0 +1,38 @@ +STMicroelectronics Low Power Controller (LPC) - Watchdog +======================================================== + +LPC currently supports Watchdog OR Real Time Clock functionality. + +[See: ../rtc/rtc-st-lpc.txt for RTC options] + +Required properties + +- compatible : Must be one of: "st,stih407-lpc" "st,stih416-lpc" + "st,stih415-lpc" "st,stid127-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 two modes ST_LPC_MODE_RTC [0] or + ST_LPC_MODE_WDT [1]. 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; + }; |