mirror of
https://github.com/Telecominfraproject/OpenCellular.git
synced 2026-01-12 19:04:59 +00:00
8a66ae3182
Clean up timer initialization code to be more general, so that we can
use timer 9 for the LSB on STM32L. Then use timer 4 for the watchdog
helper.
BUG=chrome-os-partner:18781
BRANCH=none
TEST=From EC console:
timerinfo -> current time still counts up properly
waitms 2000 -> prints watchdog info before rebooting
Change-Id: Ib0ba496b0eadb93756dcd1841857546910baf2a9
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/59612
Reviewed-by: Simon Glass <sjg@chromium.org>
70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
* found in the LICENSE file.
|
|
*/
|
|
|
|
/* Hardware timer driver API */
|
|
|
|
#ifndef __CROS_EC_HWTIMER_H
|
|
#define __CROS_EC_HWTIMER_H
|
|
|
|
/**
|
|
* Programs when the next timer should fire an interrupt.
|
|
* deadline: timestamp of the event.
|
|
*/
|
|
void __hw_clock_event_set(uint32_t deadline);
|
|
|
|
/* Returns the timestamp of the next programed event */
|
|
uint32_t __hw_clock_event_get(void);
|
|
|
|
/* Cancel the next event programed by __hw_clock_event_set */
|
|
void __hw_clock_event_clear(void);
|
|
|
|
/* Returns the value of the free-running counter used as clock. */
|
|
uint32_t __hw_clock_source_read(void);
|
|
|
|
/* Override the current value of the hardware counter */
|
|
void __hw_clock_source_set(uint32_t ts);
|
|
|
|
/**
|
|
* Enable clock to a timer.
|
|
*
|
|
* @param n Timer number to enable
|
|
*/
|
|
void __hw_timer_enable_clock(int n);
|
|
|
|
/**
|
|
* Initializes the hardware timer used to provide clock services, using the
|
|
* specified start timer value.
|
|
*
|
|
* It returns the IRQ number of the timer routine.
|
|
*/
|
|
int __hw_clock_source_init(uint32_t start_t);
|
|
|
|
/**
|
|
* Searches the next deadline and program it in the timer hardware.
|
|
*
|
|
* overflow: if true, the 32-bit counter as overflowed since the last call.
|
|
*
|
|
* This function is exported from the common timers code as an helper for the
|
|
* hardware timer interrupt routine.
|
|
*/
|
|
void process_timers(int overflow);
|
|
|
|
/**
|
|
* Set up the timer that we will use as a watchdog warning.
|
|
*
|
|
* Once this has been set up, we will print a warning shortly before the
|
|
* real watchdog fires. To avoid this, hwtimer_reset_watchdog() must be
|
|
* called periodically.
|
|
*
|
|
* This is needed since the real watchdog timer (IWDG) does not provide
|
|
* an interrupt to warn of an impending watchdog reset.
|
|
*/
|
|
void hwtimer_setup_watchdog(void);
|
|
|
|
/* Reset the watchdog timer, to avoid the watchdog warning */
|
|
void hwtimer_reset_watchdog(void);
|
|
|
|
#endif /* __CROS_EC_HWTIMER_H */
|