From eb623ab2044f77648658f4b0763616f5e1bea57a Mon Sep 17 00:00:00 2001 From: Gabe Black Date: Sun, 6 Oct 2013 10:54:53 -0700 Subject: tegra124: Implement the monotonic timer by reading the 1us timer register. It turns out there's a register in tegra which automatically counts at 1us increments. It's primarily intended for hardware to use (I think to drive other timers) but we can read it ourselves since a 1us timer is exactly what we need to support the monotonic timer API. Change-Id: I68e947944acec7b460e61f42dbb325643a9739e8 Signed-off-by: Gabe Black Reviewed-on: https://chromium-review.googlesource.com/172044 Reviewed-by: Ronald Minnich Reviewed-by: David Hendricks Commit-Queue: Gabe Black Tested-by: Gabe Black (cherry picked from commit 161a39c53404ea0125221bbd54e54996967d6855) Signed-off-by: Isaac Christensen Reviewed-on: http://review.coreboot.org/6620 Reviewed-by: Ronald G. Minnich Tested-by: build bot (Jenkins) --- src/soc/nvidia/tegra124/monotonic_timer.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'src/soc/nvidia/tegra124') diff --git a/src/soc/nvidia/tegra124/monotonic_timer.c b/src/soc/nvidia/tegra124/monotonic_timer.c index 3423dde3f5..7967b83bef 100644 --- a/src/soc/nvidia/tegra124/monotonic_timer.c +++ b/src/soc/nvidia/tegra124/monotonic_timer.c @@ -17,8 +17,11 @@ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ +#include +#include #include void timer_monotonic_get(struct mono_time *mt) { + mono_time_set_usecs(mt, read32((void *)TEGRA_TMRUS_BASE)); } -- cgit v1.2.3