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/* SPDX-License-Identifier: BSD-2-Clause */
/*
* AMBA Plug & Play routines
*
* COPYRIGHT (c) 2011
* Aeroflex Gaisler
*
* 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.
*
* 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 <grlib/ambapp.h>
/* AMBAPP helper routine to find a device by index. The function is given to
* ambapp_for_each, the argument may be NULL (find first device) or a pointer
* to a index which is downcounted until 0 is reached. If the int-pointer
* points to a value of:
* 0 - first device is returned
* 1 - second device is returned
* ...
*
* The matching device is returned, which will stop the ambapp_for_each search.
* If zero is returned from ambapp_for_each no device matching the index was
* found
*/
int ambapp_find_by_idx(struct ambapp_dev *dev, int index, void *pcount)
{
int *pi = pcount;
if (pi) {
if ((*pi)-- == 0)
return (int)dev;
else
return 0;
} else {
/* Satisfied with first matching device, stop search */
return (int)dev;
}
}
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