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be82b3a0bf
We've removed kernel option EXT_RESOURCES almost two years ago. While it was ok to have some code under a common 'extres' subdirectory at first, we now have a lot of consumer of it and we made it mandatory so no need to have it under a cryptic name. Reviewed by: mhorne Sponsored by: Beckhoff Automation GmbH & Co. KG Differential Revision: https://reviews.freebsd.org/D43191
113 lines
3.2 KiB
C
113 lines
3.2 KiB
C
/*-
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* Copyright (c) 2021 Adrian Chadd <adrian@FreeBSD.org>.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/rman.h>
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#include <machine/bus.h>
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#include <dev/clk/clk.h>
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#include <dev/clk/clk_div.h>
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#include <dev/clk/clk_fixed.h>
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#include <dev/clk/clk_mux.h>
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#include "qcom_clk_fdiv.h"
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#include "clkdev_if.h"
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/*
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* This is a fixed divisor node. It represents some divisor
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* that is setup by the boot environment and we don't have
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* any need for the driver to go and fiddle with.
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*
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* It likely should just live in the extres/clk code.
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*/
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struct qcom_clk_fdiv_sc {
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struct clknode *clknode;
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uint32_t divisor;
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};
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static int
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qcom_clk_fdiv_recalc(struct clknode *clk, uint64_t *freq)
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{
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struct qcom_clk_fdiv_sc *sc;
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sc = clknode_get_softc(clk);
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if (freq == NULL || *freq == 0) {
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printf("%s: called; NULL or 0 frequency\n", __func__);
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return (ENXIO);
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}
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*freq = *freq / sc->divisor;
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return (0);
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}
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static int
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qcom_clk_fdiv_init(struct clknode *clk, device_t dev)
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{
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/*
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* There's only a single parent here for an fixed divisor,
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* so just set it to 0; the caller doesn't need to supply it.
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*/
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clknode_init_parent_idx(clk, 0);
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return(0);
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}
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static clknode_method_t qcom_clk_fdiv_methods[] = {
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/* Device interface */
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CLKNODEMETHOD(clknode_init, qcom_clk_fdiv_init),
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CLKNODEMETHOD(clknode_recalc_freq, qcom_clk_fdiv_recalc),
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CLKNODEMETHOD_END
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};
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DEFINE_CLASS_1(qcom_clk_fepll, qcom_clk_fdiv_class, qcom_clk_fdiv_methods,
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sizeof(struct qcom_clk_fdiv_sc), clknode_class);
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int
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qcom_clk_fdiv_register(struct clkdom *clkdom, struct qcom_clk_fdiv_def *clkdef)
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{
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struct clknode *clk;
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struct qcom_clk_fdiv_sc *sc;
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clk = clknode_create(clkdom, &qcom_clk_fdiv_class, &clkdef->clkdef);
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if (clk == NULL)
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return (1);
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sc = clknode_get_softc(clk);
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sc->clknode = clk;
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sc->divisor = clkdef->divisor;
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clknode_register(clkdom, clk);
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return (0);
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}
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