1*94673892Sjsg /* $OpenBSD: omsysc.c,v 1.4 2023/09/22 01:10:43 jsg Exp $ */
24d149eb4Skettenis /*
34d149eb4Skettenis * Copyright (c) 2020 Mark Kettenis <kettenis@openbsd.org>
44d149eb4Skettenis *
54d149eb4Skettenis * Permission to use, copy, modify, and distribute this software for any
64d149eb4Skettenis * purpose with or without fee is hereby granted, provided that the above
74d149eb4Skettenis * copyright notice and this permission notice appear in all copies.
84d149eb4Skettenis *
94d149eb4Skettenis * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
104d149eb4Skettenis * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
114d149eb4Skettenis * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
124d149eb4Skettenis * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
134d149eb4Skettenis * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
144d149eb4Skettenis * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
154d149eb4Skettenis * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
164d149eb4Skettenis */
174d149eb4Skettenis
184d149eb4Skettenis #include <sys/param.h>
194d149eb4Skettenis #include <sys/device.h>
204d149eb4Skettenis
214d149eb4Skettenis #include <machine/fdt.h>
224d149eb4Skettenis
234d149eb4Skettenis #include <dev/ofw/openfirm.h>
244d149eb4Skettenis #include <dev/ofw/ofw_clock.h>
254d149eb4Skettenis #include <dev/ofw/fdt.h>
264d149eb4Skettenis
27*94673892Sjsg #include <machine/simplebusvar.h>
284d149eb4Skettenis
294d149eb4Skettenis struct omsysc_softc {
304d149eb4Skettenis struct simplebus_softc sc_bus;
314d149eb4Skettenis };
324d149eb4Skettenis
334d149eb4Skettenis int omsysc_match(struct device *, void *, void *);
344d149eb4Skettenis void omsysc_attach(struct device *, struct device *, void *);
354d149eb4Skettenis
36471aeecfSnaddy const struct cfattach omsysc_ca = {
374d149eb4Skettenis sizeof(struct omsysc_softc), omsysc_match, omsysc_attach
384d149eb4Skettenis };
394d149eb4Skettenis
404d149eb4Skettenis struct cfdriver omsysc_cd = {
414d149eb4Skettenis NULL, "omsysc", DV_DULL
424d149eb4Skettenis };
434d149eb4Skettenis
444d149eb4Skettenis int
omsysc_match(struct device * parent,void * cfdata,void * aux)454d149eb4Skettenis omsysc_match(struct device *parent, void *cfdata, void *aux)
464d149eb4Skettenis {
474d149eb4Skettenis struct fdt_attach_args *faa = aux;
484d149eb4Skettenis struct cfdata *cf = cfdata;
494d149eb4Skettenis int node;
504d149eb4Skettenis
514d149eb4Skettenis /*
524d149eb4Skettenis * On AM33xx we need to make sure we attach the PRCM and SCM
534d149eb4Skettenis * modules since they provide clock and pinctrl for other
544d149eb4Skettenis * hardware modules. Therefore we attach those during the
554d149eb4Skettenis * "early" phase.
564d149eb4Skettenis */
574d149eb4Skettenis node = OF_child(faa->fa_node);
584d149eb4Skettenis if (node && cf->cf_loc[0]) {
594d149eb4Skettenis return (OF_is_compatible(node, "ti,am3-prcm") ||
604d149eb4Skettenis OF_is_compatible(node, "ti,am3-scm"));
614d149eb4Skettenis }
624d149eb4Skettenis
634d149eb4Skettenis return OF_is_compatible(faa->fa_node, "ti,sysc");
644d149eb4Skettenis }
654d149eb4Skettenis
664d149eb4Skettenis void
omsysc_attach(struct device * parent,struct device * self,void * aux)674d149eb4Skettenis omsysc_attach(struct device *parent, struct device *self, void *aux)
684d149eb4Skettenis {
694d149eb4Skettenis struct omsysc_softc *sc = (struct omsysc_softc *)self;
704d149eb4Skettenis struct fdt_attach_args *faa = aux;
714d149eb4Skettenis
724d149eb4Skettenis if (OF_getproplen(faa->fa_node, "ti,hwmods") < 0 &&
734d149eb4Skettenis OF_is_compatible(faa->fa_node, "ti,sysc-omap2"))
744d149eb4Skettenis clock_enable(faa->fa_node, "fck");
754d149eb4Skettenis
764d149eb4Skettenis simplebus_attach(parent, &sc->sc_bus.sc_dev, faa);
774d149eb4Skettenis }
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