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 static int 39 ofw_clkbus_probe(device_t dev) 40 { 41 const char *name; 42 43 name = ofw_bus_get_name(dev); 44 45 if (name == NULL || strcmp(name, "clocks") != 0) 46 return (ENXIO); 47 48 device_set_desc(dev, "OFW clocks bus"); 49 50 return (BUS_PROBE_GENERIC); 51 } 52 53 static int 54 ofw_clkbus_attach(device_t dev) 55 { 56 int rv; 57 58 rv = simplebus_attach_impl(dev, SB_FLAG_NO_RANGES, 0); 59 if (rv != 0) 60 return (rv); 61 62 bus_attach_children(dev); 63 return (0); 64 } 65 66 static device_method_t ofw_clkbus_methods[] = { 67 /* Device interface */ 68 DEVMETHOD(device_probe, ofw_clkbus_probe), 69 DEVMETHOD(device_attach, ofw_clkbus_attach), 70 71 DEVMETHOD_END 72 }; 73 74 DEFINE_CLASS_1(ofw_clkbus, ofw_clkbus_driver, ofw_clkbus_methods, 75 0, simplebus_driver); 76 EARLY_DRIVER_MODULE(ofw_clkbus, simplebus, ofw_clkbus_driver, 0, 0, 77 BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE); 78 MODULE_VERSION(ofw_clkbus, 1); 79