Home | History | Annotate | Download | only in watchdog 
      1 // SPDX-License-Identifier: GPL-2.0
      2 /*
      3  * Watchdog driver for Broadcom BCM2835
      4  *
      5  * Copyright (C) 2017 Paolo Pisati <p.pisati (at) gmail.com>
      6  */
      7 
      8 #include <common.h>
      9 #include <efi_loader.h>
     10 #include <asm/io.h>
     11 #include <asm/arch/wdog.h>
     12 
     13 #define SECS_TO_WDOG_TICKS(x) ((x) << 16)
     14 #define MAX_TIMEOUT   0xf /* ~15s */
     15 
     16 static __efi_runtime_data bool enabled = true;
     17 
     18 extern void reset_cpu(ulong ticks);
     19 
     20 void hw_watchdog_reset(void)
     21 {
     22 	if (enabled)
     23 		reset_cpu(SECS_TO_WDOG_TICKS(MAX_TIMEOUT));
     24 }
     25 
     26 void hw_watchdog_init(void)
     27 {
     28 	hw_watchdog_reset();
     29 }
     30 
     31 void __efi_runtime hw_watchdog_disable(void)
     32 {
     33 	enabled = false;
     34 }
     35