gtmr_fdt.c revision 1.5
1/* $NetBSD: gtmr_fdt.c,v 1.5 2017/08/24 13:06:23 jmcneill 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: gtmr_fdt.c,v 1.5 2017/08/24 13:06:23 jmcneill Exp $"); 31 32#include <sys/param.h> 33#include <sys/bus.h> 34#include <sys/device.h> 35#include <sys/intr.h> 36#include <sys/systm.h> 37#include <sys/kernel.h> 38#include <sys/kmem.h> 39 40#include <arm/cortex/gtmr_intr.h> 41#include <arm/cortex/mpcore_var.h> 42#include <arm/cortex/gtmr_var.h> 43 44#include <dev/fdt/fdtvar.h> 45#include <arm/fdt/arm_fdtvar.h> 46 47static int gtmr_fdt_match(device_t, cfdata_t, void *); 48static void gtmr_fdt_attach(device_t, device_t, void *); 49 50static void gtmr_fdt_cpu_hatch(void *, struct cpu_info *); 51 52CFATTACH_DECL_NEW(gtmr_fdt, 0, gtmr_fdt_match, gtmr_fdt_attach, NULL, NULL); 53 54static int 55gtmr_fdt_match(device_t parent, cfdata_t cf, void *aux) 56{ 57 const char * const compatible[] = { 58 "arm,armv7-timer", 59 "arm,armv8-timer", 60 NULL 61 }; 62 struct fdt_attach_args * const faa = aux; 63 64 return of_compatible(faa->faa_phandle, compatible) >= 0; 65} 66 67static void 68gtmr_fdt_attach(device_t parent, device_t self, void *aux) 69{ 70 aprint_naive("\n"); 71 aprint_normal(": Generic Timer\n"); 72 73 struct mpcore_attach_args mpcaa = { 74 .mpcaa_name = "armgtmr", 75 .mpcaa_irq = IRQ_GTMR_PPI_VTIMER 76 }; 77 78 config_found(self, &mpcaa, NULL); 79 80 arm_fdt_cpu_hatch_register(self, gtmr_fdt_cpu_hatch); 81 arm_fdt_timer_register(gtmr_cpu_initclocks); 82} 83 84static void 85gtmr_fdt_cpu_hatch(void *priv, struct cpu_info *ci) 86{ 87 gtmr_init_cpu_clock(ci); 88} 89