xref: /freebsd/sys/contrib/device-tree/Bindings/rtc/rtc-st-lpc.txt (revision 19261079b74319502c6ffa1249920079f0f69a72) 
1STMicroelectronics Low Power Controller (LPC) - RTC
2===================================================
3
4LPC currently supports Watchdog OR Real Time Clock OR Clocksource
5functionality.
6
7[See: ../watchdog/st_lpc_wdt.txt for Watchdog options]
8[See: ../timer/st,stih407-lpc for Clocksource options]
9
10Required properties
11
12- compatible 	: Must be: "st,stih407-lpc"
13- reg		: LPC registers base address + size
14- interrupts    : LPC interrupt line number and associated flags
15- clocks	: Clock used by LPC device (See: ../clock/clock-bindings.txt)
16- st,lpc-mode	: The LPC can run either one of three modes:
17                  ST_LPC_MODE_RTC    [0]
18                  ST_LPC_MODE_WDT    [1]
19                  ST_LPC_MODE_CLKSRC [2]
20		 One (and only one) mode must be selected.
21
22Example:
23	lpc@fde05000 {
24		compatible	= "st,stih407-lpc";
25		reg		= <0xfde05000 0x1000>;
26		clocks 		= <&clk_s_d3_flexgen CLK_LPC_0>;
27		st,lpc-mode	= <ST_LPC_MODE_RTC>;
28	};
29