Tegra2: Add microsecond timer function

These functions provide access to the high resolution microsecond timer
and tidy up a global variable in the code.

Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 30 insertions, 0 deletions

diff --git a/arch/arm/include/asm/arch-tegra2/timer.h b/arch/arm/include/asm/arch-tegra2/timer.h
new file mode 100644
index 0000000000..adefa2c6c1
--- /dev/null
+++ b/arch/arm/include/asm/arch-tegra2/timer.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2011 The Chromium OS Authors.
+ * 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
+ */
+
+/* Tegra2 timer functions */
+
+#ifndef _TEGRA2_TIMER_H
+#define _TEGRA2_TIMER_H
+
+/* returns the current monotonic timer value in microseconds */
+unsigned long timer_get_us(void);
+
+#endif