On current ST platforms the LPC controls a number of functions including
Watchdog and Real Time Clock. This patch provides the bindings used to
choose and configure the devices.
Signed-off-by: Lee Jones <lee.jones@xxxxxxxxxx>
---
Documentation/devicetree/bindings/mfd/st-lpc.txt | 36 ++++++++++++++++++++++++
1 file changed, 36 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mfd/st-lpc.txt
diff --git a/Documentation/devicetree/bindings/mfd/st-lpc.txt b/Documentation/devicetree/bindings/mfd/st-lpc.txt
new file mode 100644
index 0000000..b13f143
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/st-lpc.txt
@@ -0,0 +1,36 @@
+STMicroelectronics Low Power Controller (LPC)
+=============================================
+
+Currently supports Watchdog OR Real Time Clock functionality.
+
+Required properties [common]
+
+- 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,stih416-lpc-watchdog";
+ reg = <0xfde05000 0x1000>;
+ clocks = <&clk_s_d3_flexgen CLK_LPC_0>;
+ st,syscfg = <&syscfg_core>;
+ timeout-sec = <600>;
+ st,lpc-mode = <ST_LPC_MODE_WDT>;
+ st,warm-reset;
+ };
--
1.9.1
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