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/*
* Copyright (c) 2025 Ian Marco Moffett and L5 engineers
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/errno.h>
#include <os/clkdev.h>
#include <os/spinlock.h>
static uint8_t nclk = 0;
static struct clkdev *clklist[MAX_CLKDEV];
static struct spinlock lock;
/*
* Register a clock device
*/
int
clkdev_register(struct clkdev *clkdev)
{
if (clkdev == NULL) {
return -EINVAL;
}
if (nclk >= MAX_CLKDEV) {
return -ENOSPC;
}
spinlock_acquire(&lock);
clklist[nclk++] = clkdev;
spinlock_release(&lock);
return 0;
}
/*
* Get a specific clock device from index
*/
int
clkdev_get(uint16_t attr, struct clkdev **clkdev_res)
{
if (clkdev_res == NULL) {
return -EINVAL;
}
/* Must find one that matches 'attr' */
for (int i = 0; i < MAX_CLKDEV; ++i) {
if (clklist[i]->attr == attr) {
*clkdev_res = clklist[i];
return 0;
}
}
return -1;
}
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