at91: rename clocksource.c -> at91sam926x_time.c

preparation to move the rm9200 to the same api as other at91

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

1 files changed, 85 insertions, 0 deletions

diff --git a/arch/arm/mach-at91/at91sam926x_time.c b/arch/arm/mach-at91/at91sam926x_time.c
new file mode 100644
index 0000000000..84df1a13ad
--- /dev/null
+++ b/arch/arm/mach-at91/at91sam926x_time.c
@@ -0,0 +1,85 @@
+/*
+ * (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	= 0xffffffff,
+	.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 ignored)
+{
+	at91_sys_write(AT91_RSTC_CR, AT91_RSTC_KEY |
+				     AT91_RSTC_PROCRST |
+				     AT91_RSTC_PERRST);
+
+	/* Not reached */
+	while (1);
+}
+EXPORT_SYMBOL(reset_cpu);