77 lines
2.3 KiB
C
77 lines
2.3 KiB
C
/* $OpenBSD: omsysc.c,v 1.4 2023/09/22 01:10:43 jsg Exp $ */
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/*
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* Copyright (c) 2020 Mark Kettenis <kettenis@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/param.h>
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#include <sys/device.h>
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#include <machine/fdt.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/ofw/ofw_clock.h>
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#include <dev/ofw/fdt.h>
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#include <machine/simplebusvar.h>
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struct omsysc_softc {
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struct simplebus_softc sc_bus;
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};
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int omsysc_match(struct device *, void *, void *);
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void omsysc_attach(struct device *, struct device *, void *);
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const struct cfattach omsysc_ca = {
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sizeof(struct omsysc_softc), omsysc_match, omsysc_attach
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};
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struct cfdriver omsysc_cd = {
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NULL, "omsysc", DV_DULL
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};
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int
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omsysc_match(struct device *parent, void *cfdata, void *aux)
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{
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struct fdt_attach_args *faa = aux;
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struct cfdata *cf = cfdata;
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int node;
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/*
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* On AM33xx we need to make sure we attach the PRCM and SCM
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* modules since they provide clock and pinctrl for other
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* hardware modules. Therefore we attach those during the
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* "early" phase.
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*/
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node = OF_child(faa->fa_node);
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if (node && cf->cf_loc[0]) {
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return (OF_is_compatible(node, "ti,am3-prcm") ||
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OF_is_compatible(node, "ti,am3-scm"));
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}
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return OF_is_compatible(faa->fa_node, "ti,sysc");
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}
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void
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omsysc_attach(struct device *parent, struct device *self, void *aux)
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{
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struct omsysc_softc *sc = (struct omsysc_softc *)self;
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struct fdt_attach_args *faa = aux;
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if (OF_getproplen(faa->fa_node, "ti,hwmods") < 0 &&
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OF_is_compatible(faa->fa_node, "ti,sysc-omap2"))
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clock_enable(faa->fa_node, "fck");
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simplebus_attach(parent, &sc->sc_bus.sc_dev, faa);
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}
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