| /* |
| * (C) Copyright 2002 |
| * Sysgo Real-Time Solutions, GmbH <www.elinos.com> |
| * Marius Groeger <mgroeger@sysgo.de> |
| * |
| * (C) Copyright 2002 |
| * Sysgo Real-Time Solutions, GmbH <www.elinos.com> |
| * Alex Zuepke <azu@sysgo.de> |
| * |
| * (C) Copyright 2002 |
| * Gary Jennejohn, DENX Software Engineering, <gj@denx.de> |
| * |
| * See file CREDITS for list of people who contributed to this |
| * project. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; either version 2 of |
| * the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| * MA 02111-1307 USA |
| */ |
| |
| #include <common.h> |
| #include <init.h> |
| #include <clock.h> |
| #include <asm/hardware.h> |
| #include <mach/at91_pit.h> |
| #include <mach/at91_pmc.h> |
| #include <mach/at91_rstc.h> |
| #include <mach/io.h> |
| #include <asm/io.h> |
| |
| uint64_t at91sam9_clocksource_read(void) |
| { |
| return at91_sys_read(AT91_PIT_PIIR); |
| } |
| |
| static struct clocksource cs = { |
| .read = at91sam9_clocksource_read, |
| .mask = CLOCKSOURCE_MASK(32), |
| .shift = 10, |
| }; |
| |
| static int clocksource_init (void) |
| { |
| /* |
| * Enable PITC Clock |
| * The clock is already enabled for system controller in boot |
| */ |
| at91_sys_write(AT91_PMC_PCER, 1 << AT91_ID_SYS); |
| |
| /* Enable PITC */ |
| at91_sys_write(AT91_PIT_MR, 0xfffff | AT91_PIT_PITEN); |
| |
| cs.mult = clocksource_hz2mult(1000000 * 6, cs.shift); |
| |
| init_clock(&cs); |
| |
| return 0; |
| } |
| |
| core_initcall(clocksource_init); |
| |
| /* |
| * Reset the cpu through the reset controller |
| */ |
| void __noreturn reset_cpu (unsigned long addr) |
| { |
| at91_sys_write(AT91_RSTC_CR, AT91_RSTC_KEY | |
| AT91_RSTC_PROCRST | |
| AT91_RSTC_PERRST); |
| |
| /* Not reached */ |
| while (1); |
| } |
| EXPORT_SYMBOL(reset_cpu); |
