1/*- 2 * Copyright 2016 Michal Meloun <mmel@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: releng/11.0/sys/dev/extres/clk/clk_bus.c 297213 2016-03-23 19:21:21Z jmcneill $"); 29 30#include <sys/param.h> 31#include <sys/systm.h> 32#include <sys/kernel.h> 33#include <sys/module.h> 34#include <sys/bus.h> 35 36#include <dev/fdt/simplebus.h> 37 38#include <dev/ofw/openfirm.h> 39#include <dev/ofw/ofw_bus_subr.h> 40 41struct ofw_clkbus_softc { 42 struct simplebus_softc simplebus_sc; 43}; 44 45static int 46ofw_clkbus_probe(device_t dev) 47{ 48 const char *name; 49 50 name = ofw_bus_get_name(dev); 51 52 if (name == NULL || strcmp(name, "clocks") != 0) 53 return (ENXIO); 54 55 device_set_desc(dev, "OFW clocks bus"); 56 57 return (BUS_PROBE_GENERIC); 58} 59 60static int 61ofw_clkbus_attach(device_t dev) 62{ 63 struct ofw_clkbus_softc *sc; 64 phandle_t node, child; 65 device_t cdev; 66 67 sc = device_get_softc(dev); 68 node = ofw_bus_get_node(dev); 69 simplebus_init(dev, node); 70 71 for (child = OF_child(node); child > 0; child = OF_peer(child)) { 72 cdev = simplebus_add_device(dev, child, 0, NULL, -1, NULL); 73 if (cdev != NULL) 74 device_probe_and_attach(cdev); 75 } 76 77 return (bus_generic_attach(dev)); 78} 79 80static device_method_t ofw_clkbus_methods[] = { 81 /* Device interface */ 82 DEVMETHOD(device_probe, ofw_clkbus_probe), 83 DEVMETHOD(device_attach, ofw_clkbus_attach), 84 85 DEVMETHOD_END 86}; 87 88DEFINE_CLASS_1(ofw_clkbus, ofw_clkbus_driver, ofw_clkbus_methods, 89 sizeof(struct ofw_clkbus_softc), simplebus_driver); 90static devclass_t ofw_clkbus_devclass; 91EARLY_DRIVER_MODULE(ofw_clkbus, simplebus, ofw_clkbus_driver, 92 ofw_clkbus_devclass, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE); 93MODULE_VERSION(ofw_clkbus, 1); 94