Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=699a714501f028b1db2bf741111a0df856128899
Commit:     699a714501f028b1db2bf741111a0df856128899
Parent:     7a8be08b1be0bb2a973787bdf888e0a4177cdcd8
Author:     Greg Ungerer <[EMAIL PROTECTED]>
AuthorDate: Mon Jul 30 02:38:47 2007 +0100
Committer:  Russell King <[EMAIL PROTECTED]>
CommitDate: Fri Oct 12 23:43:04 2007 +0100

    [ARM] 4533/1: AT91x40 timer support
    
    Support for the timers in the Atmel AT91x40 family of CPUs.
    
    Signed-off-by: Greg Ungerer <[EMAIL PROTECTED]>
    Acked-by: Andrew Victor <[EMAIL PROTECTED]>
    Signed-off-by: Russell King <[EMAIL PROTECTED]>
---
 arch/arm/mach-at91/at91x40_time.c |   80 +++++++++++++++++++++++++++++++++++++
 1 files changed, 80 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-at91/at91x40_time.c 
b/arch/arm/mach-at91/at91x40_time.c
new file mode 100644
index 0000000..eddc882
--- /dev/null
+++ b/arch/arm/mach-at91/at91x40_time.c
@@ -0,0 +1,80 @@
+/*
+ * arch/arm/mach-at91/at91x40_time.c
+ *
+ * (C) Copyright 2007, Greg Ungerer <[EMAIL PROTECTED]>
+ *
+ * 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 <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/time.h>
+#include <asm/hardware.h>
+#include <asm/io.h>
+#include <asm/mach/time.h>
+#include <asm/arch/at91_tc.h>
+
+/*
+ *     3 counter/timer units present.
+ */
+#define        AT91_TC_CLK0BASE        0
+#define        AT91_TC_CLK1BASE        0x40
+#define        AT91_TC_CLK2BASE        0x80
+
+static unsigned long at91x40_gettimeoffset(void)
+{
+       return (at91_sys_read(AT91_TC + AT91_TC_CLK1BASE + AT91_TC_CV) * 
1000000 / (AT91X40_MASTER_CLOCK / 128));
+}
+
+static irqreturn_t at91x40_timer_interrupt(int irq, void *dev_id)
+{
+       at91_sys_read(AT91_TC + AT91_TC_CLK1BASE + AT91_TC_SR);
+       timer_tick();
+       return IRQ_HANDLED;
+}
+
+static struct irqaction at91x40_timer_irq = {
+       .name           = "at91_tick",
+       .flags          = IRQF_DISABLED | IRQF_TIMER,
+       .handler        = at91x40_timer_interrupt
+};
+
+void __init at91x40_timer_init(void)
+{
+       unsigned int v;
+
+       at91_sys_write(AT91_TC + AT91_TC_BCR, 0);
+       v = at91_sys_read(AT91_TC + AT91_TC_BMR);
+       v = (v & ~AT91_TC_TC1XC1S) | AT91_TC_TC1XC1S_NONE;
+       at91_sys_write(AT91_TC + AT91_TC_BMR, v);
+
+       at91_sys_write(AT91_TC + AT91_TC_CLK1BASE + AT91_TC_CCR, 
AT91_TC_CLKDIS);
+       at91_sys_write(AT91_TC + AT91_TC_CLK1BASE + AT91_TC_CMR, 
(AT91_TC_TIMER_CLOCK4 | AT91_TC_CPCTRG));
+       at91_sys_write(AT91_TC + AT91_TC_CLK1BASE + AT91_TC_IDR, 0xffffffff);
+       at91_sys_write(AT91_TC + AT91_TC_CLK1BASE + AT91_TC_RC, 
(AT91X40_MASTER_CLOCK / 128) / HZ - 1);
+       at91_sys_write(AT91_TC + AT91_TC_CLK1BASE + AT91_TC_IER, (1<<4));
+
+       setup_irq(AT91X40_ID_TC1, &at91x40_timer_irq);
+
+       at91_sys_write(AT91_TC + AT91_TC_CLK1BASE + AT91_TC_CCR, (AT91_TC_SWTRG 
| AT91_TC_CLKEN));
+}
+
+struct sys_timer at91x40_timer = {
+       .init   = at91x40_timer_init,
+       .offset = at91x40_gettimeoffset,
+};
+
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