The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)

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FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/rtc/rtc-st-lpc.txt

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    1 STMicroelectronics Low Power Controller (LPC) - RTC
    2 ===================================================
    3 
    4 LPC currently supports Watchdog OR Real Time Clock OR Clocksource
    5 functionality.
    6 
    7 [See: ../watchdog/st_lpc_wdt.txt for Watchdog options]
    8 [See: ../timer/st,stih407-lpc for Clocksource options]
    9 
   10 Required 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 
   22 Example:
   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         };

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