1 /* $NetBSD: plrtc_fdt.c,v 1.2 2021/01/27 03:10:19 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2017 Jared McNeill <jmcneill@invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: plrtc_fdt.c,v 1.2 2021/01/27 03:10:19 thorpej Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/bus.h> 34 #include <sys/device.h> 35 #include <sys/systm.h> 36 #include <sys/kernel.h> 37 38 #include <dev/fdt/fdtvar.h> 39 40 #include <dev/ic/pl031var.h> 41 42 static int plrtc_fdt_match(device_t, cfdata_t, void *); 43 static void plrtc_fdt_attach(device_t, device_t, void *); 44 45 static const struct device_compatible_entry compat_data[] = { 46 { .compat = "arm,pl031" }, 47 DEVICE_COMPAT_EOL 48 }; 49 50 CFATTACH_DECL_NEW(plrtc_fdt, sizeof(struct plrtc_softc), 51 plrtc_fdt_match, plrtc_fdt_attach, NULL, NULL); 52 53 static int 54 plrtc_fdt_match(device_t parent, cfdata_t cf, void *aux) 55 { 56 struct fdt_attach_args * const faa = aux; 57 58 return of_compatible_match(faa->faa_phandle, compat_data); 59 } 60 61 static void 62 plrtc_fdt_attach(device_t parent, device_t self, void *aux) 63 { 64 struct plrtc_softc * const sc = device_private(self); 65 struct fdt_attach_args * const faa = aux; 66 const int phandle = faa->faa_phandle; 67 bus_addr_t addr; 68 bus_size_t size; 69 70 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 71 aprint_error(": missing 'reg' property\n"); 72 return; 73 } 74 75 sc->sc_dev = self; 76 sc->sc_bst = faa->faa_bst; 77 if (bus_space_map(faa->faa_bst, addr, size, 0, &sc->sc_bsh)) { 78 aprint_error(": couldn't map device\n"); 79 return; 80 } 81 82 plrtc_attach(sc); 83 84 fdtbus_todr_attach(self, phandle, &sc->sc_todr); 85 } 86