1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2018 Emmanuel Vadot <manu@FreeBSD.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include <sys/param.h> 32 #include <sys/bus.h> 33 #include <sys/kernel.h> 34 #include <sys/module.h> 35 #include <sys/mutex.h> 36 #include <sys/rman.h> 37 #include <machine/bus.h> 38 39 #include <dev/ofw/openfirm.h> 40 #include <dev/ofw/ofw_bus.h> 41 #include <dev/ofw/ofw_bus_subr.h> 42 43 #include <dev/extres/syscon/syscon.h> 44 #include <dev/fdt/simple_mfd.h> 45 46 static struct ofw_compat_data compat_data[] = { 47 {"rockchip,rk3288-grf", 1}, 48 {"rockchip,rk3328-grf", 1}, 49 {"rockchip,rk3399-grf", 1}, 50 {"rockchip,rk3399-pmugrf", 1}, 51 {"rockchip,rk3568-grf", 1}, 52 {"rockchip,rk3568-pmugrf", 1}, 53 {"rockchip,rk3568-usb2phy-grf", 1}, 54 {"rockchip,rk3566-pipe-grf", 1}, 55 {"rockchip,rk3568-pipe-grf", 1}, 56 {"rockchip,rk3568-pipe-phy-grf", 1}, 57 {"rockchip,rk3568-pcie3-phy-grf", 1}, 58 {NULL, 0} 59 }; 60 61 static int 62 rk_grf_probe(device_t dev) 63 { 64 65 if (!ofw_bus_status_okay(dev)) 66 return (ENXIO); 67 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) 68 return (ENXIO); 69 70 device_set_desc(dev, "RockChip General Register Files"); 71 return (BUS_PROBE_DEFAULT); 72 } 73 74 static device_method_t rk_grf_methods[] = { 75 DEVMETHOD(device_probe, rk_grf_probe), 76 77 DEVMETHOD_END 78 }; 79 80 DEFINE_CLASS_1(rk_grf, rk_grf_driver, rk_grf_methods, 81 sizeof(struct simple_mfd_softc), simple_mfd_driver); 82 83 EARLY_DRIVER_MODULE(rk_grf, simplebus, rk_grf_driver, 0, 0, 84 BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE); 85 MODULE_VERSION(rk_grf, 1); 86