qcom_clk_freqtbl.c

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    1 /*-
    2  * Copyright (c) 2021 Adrian Chadd <adrian@FreeBSD.org>.
    3  *
    4  * Redistribution and use in source and binary forms, with or without
    5  * modification, are permitted provided that the following conditions
    6  * are met:
    7  * 1. Redistributions of source code must retain the above copyright
    8  *    notice, this list of conditions and the following disclaimer.
    9  * 2. Redistributions in binary form must reproduce the above copyright
   10  *    notice, this list of conditions and the following disclaimer in the
   11  *    documentation and/or other materials provided with the distribution.
   12  *
   13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   16  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   19  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   20  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   23  * SUCH DAMAGE.
   24  */
   25 
   26 #include <sys/cdefs.h>
   27 __FBSDID("$FreeBSD$");
   28 
   29 #include <sys/param.h>
   30 #include <sys/systm.h>
   31 #include <sys/bus.h>
   32 #include <sys/lock.h>
   33 #include <sys/mutex.h>
   34 #include <sys/rman.h>
   35 #include <machine/bus.h>
   36 
   37 #include "qcom_clk_freqtbl.h"
   38 
   39 /*
   40  * Walk the list of frequencies and return the highest frequency supported.
   41  */
   42 const struct qcom_clk_freq_tbl *
   43 qcom_clk_freq_tbl_lookup(const struct qcom_clk_freq_tbl *tbl, uint64_t freq)
   44 {
   45         const struct qcom_clk_freq_tbl *t;
   46 
   47         if (tbl == NULL)
   48                 return (NULL);
   49 
   50         for (t = tbl; t->freq !=0; t++) {
   51                 if (freq <= t->freq)
   52                         return (t);
   53         }
   54 
   55         return (NULL);
   56 }

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FreeBSD/Linux Kernel Cross Reference sys/dev/qcom_clk/qcom_clk_freqtbl.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/qcom_clk/qcom_clk_freqtbl.c