zephyr/drivers/timer/sys_clock_init.c

/* initialize system clock driver */

/*
 * Copyright (c) 2015 Wind River Systems, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
DESCRIPTION
Initializing the timer driver is done in this module to reduce code duplication.
Although both nanokernel and microkernel systems initialize the timer driver at
the same point, the two systems differ in when the system can begin to process
system clock ticks.  A nanokernel system can process system clock ticks once
the driver has initialized.  However, in a microkernel system all system clock
ticks are deferred (and stored on the kernel server command stack) until the
kernel server fiber starts and begins processing any queued ticks.
*/

#include <nanokernel.h>
#include <init.h>
#include <drivers/system_timer.h>

DECLARE_DEVICE_INIT_CONFIG(sys_clock, "sys_clock",
						   _sys_clock_driver_init, NULL);

nano_late_init(sys_clock, NULL);