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/param.h> 28 #include <sys/systm.h> 29 #include <sys/kernel.h> 30 #include <sys/module.h> 31 #include <sys/bus.h> 32 33 #include <dev/fdt/simplebus.h> 34 35 #include <dev/ofw/openfirm.h> 36 #include <dev/ofw/ofw_bus_subr.h> 37 38 struct ofw_clkbus_softc { 39 struct simplebus_softc simplebus_sc; 40 }; 41 42 static int 43 ofw_clkbus_probe(device_t dev) 44 { 45 const char *name; 46 47 name = ofw_bus_get_name(dev); 48 49 if (name == NULL || strcmp(name, "clocks") != 0) 50 return (ENXIO); 51 52 device_set_desc(dev, "OFW clocks bus"); 53 54 return (BUS_PROBE_GENERIC); 55 } 56 57 static int 58 ofw_clkbus_attach(device_t dev) 59 { 60 phandle_t node, child; 61 device_t cdev; 62 63 node = ofw_bus_get_node(dev); 64 simplebus_init(dev, node); 65 66 for (child = OF_child(node); child > 0; child = OF_peer(child)) { 67 cdev = simplebus_add_device(dev, child, 0, NULL, -1, NULL); 68 if (cdev != NULL) 69 device_probe_and_attach(cdev); 70 } 71 72 return (bus_generic_attach(dev)); 73 } 74 75 static device_method_t ofw_clkbus_methods[] = { 76 /* Device interface */ 77 DEVMETHOD(device_probe, ofw_clkbus_probe), 78 DEVMETHOD(device_attach, ofw_clkbus_attach), 79 80 DEVMETHOD_END 81 }; 82 83 DEFINE_CLASS_1(ofw_clkbus, ofw_clkbus_driver, ofw_clkbus_methods, 84 sizeof(struct ofw_clkbus_softc), simplebus_driver); 85 EARLY_DRIVER_MODULE(ofw_clkbus, simplebus, ofw_clkbus_driver, 0, 0, 86 BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE); 87 MODULE_VERSION(ofw_clkbus, 1); 88