armada38x_gen.c

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10

    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2022 Semihalf.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD$");
   29 
   30 #include <sys/param.h>
   31 #include <sys/systm.h>
   32 #include <sys/bus.h>
   33 
   34 #include <machine/bus.h>
   35 
   36 #include <dev/extres/clk/clk.h>
   37 
   38 #include <arm/mv/clk/armada38x_gen.h>
   39 
   40 #include "clkdev_if.h"
   41 
   42 #define SAR_A38X_TCLK_FREQ_SHIFT        15
   43 #define SAR_A38X_TCLK_FREQ_MASK         0x00008000
   44 
   45 #define TCLK_250MHZ                                     250 * 1000 * 1000
   46 #define TCLK_200MHZ                                     200 * 1000 * 1000
   47 
   48 #define WR4(_clk, offset, val)                                  \
   49         CLKDEV_WRITE_4(clknode_get_device(_clk), offset, val)
   50 #define RD4(_clk, offset, val)                                  \
   51         CLKDEV_READ_4(clknode_get_device(_clk), offset, val)
   52 #define DEVICE_LOCK(_clk)                                       \
   53         CLKDEV_DEVICE_LOCK(clknode_get_device(_clk))
   54 #define DEVICE_UNLOCK(_clk)                                     \
   55         CLKDEV_DEVICE_UNLOCK(clknode_get_device(_clk))
   56 
   57 static int
   58 armada38x_gen_recalc(struct clknode *clk, uint64_t *freq)
   59 {
   60         uint32_t reg;
   61 
   62         DEVICE_LOCK(clk);
   63         RD4(clk, 0, &reg);
   64         DEVICE_UNLOCK(clk);
   65 
   66         reg = (reg & SAR_A38X_TCLK_FREQ_MASK) >> SAR_A38X_TCLK_FREQ_SHIFT;
   67         *freq = reg ? TCLK_200MHZ : TCLK_250MHZ;
   68 
   69         return (0);
   70 }
   71 
   72 static int
   73 armada38x_gen_init(struct clknode *clk, device_t dev)
   74 {
   75         return (0);
   76 }
   77 
   78 static clknode_method_t armada38x_gen_clknode_methods[] = {
   79         /* Device interface */
   80         CLKNODEMETHOD(clknode_init,             armada38x_gen_init),
   81         CLKNODEMETHOD(clknode_recalc_freq,      armada38x_gen_recalc),
   82         CLKNODEMETHOD_END
   83 };
   84 
   85 DEFINE_CLASS_1(armada38x_gen_clknode, armada38x_gen_clknode_class,
   86     armada38x_gen_clknode_methods, 0, clknode_class);
   87 
   88 int
   89 armada38x_gen_register(struct clkdom *clkdom, const struct armada38x_gen_clknode_def *clkdef)
   90 {
   91         struct clknode *clk;
   92 
   93         clk = clknode_create(clkdom, &armada38x_gen_clknode_class, &clkdef->def);
   94         if (clk == NULL)
   95                 return (1);
   96 
   97         clknode_register(clkdom, clk);
   98 
   99         return(0);
  100 }

Cache object: dc5fc475971ae0308ac1bf4ad4c8c7dd

[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.

FreeBSD/Linux Kernel Cross Reference sys/arm/mv/clk/armada38x_gen.c

FreeBSD/Linux Kernel Cross Reference
sys/arm/mv/clk/armada38x_gen.c