[coreboot-gerrit] New patch to review for coreboot: f8fdb71 libpayload: pistachio: fix timer implementation

[Patrick Georgi]

Patrick Georgi ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/8744

-gerrit

commit f8fdb71f4c28aa451d83e6888482905ee99e3a88
Author: Ionela Voinescu 
Date:   Thu Jan 22 14:53:28 2015 +0000

libpayload: pistachio: fix timer implementation

timer_raw_value must return the number of CPU ticks, and not
    the time obtained by dividing the ticks by the CPU frequency.
    The CPU counter is increased at every 2 CPU clocks
    and therfore the number of ticks will be the counter value
    multiplied by 2.

BUG=chrome-os-partner:31438
    TEST=tested on Pistachio FPGA; it works properly.
    BRANCH=none

Change-Id: Iae62cb328e882f84822250bdf72146321ca9bbe0
    Signed-off-by: Patrick Georgi 
    Original-Commit-Id: 7ab25ce7dcaffb453ee774d870963a56444d46af
    Original-Change-Id: I74408950900463a2c054d5aebd3edb005a325adb
    Original-Signed-off-by: Ionela Voinescu 
    Original-Reviewed-on: https://chromium-review.googlesource.com/242393
    Original-Reviewed-by: David Hendricks 
---
 payloads/libpayload/drivers/timer/img_pistachio.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/payloads/libpayload/drivers/timer/img_pistachio.c b/payloads/libpayload/drivers/timer/img_pistachio.c
index dcfe555..ae53a9d 100644
--- a/payloads/libpayload/drivers/timer/img_pistachio.c
+++ b/payloads/libpayload/drivers/timer/img_pistachio.c
@@ -20,11 +20,6 @@
 #include <libpayload.h>
 #include <arch/cpu.h>

-static int get_timer_speed_khz(void)
-{
-	return get_cpu_speed()/2;
-}
-
 uint64_t timer_hz(void)
 {
    return lib_sysinfo.cpu_khz * 1000;
@@ -32,5 +27,5 @@ uint64_t timer_hz(void)

uint64_t timer_raw_value(void)
 {
-	return read_c0_count()/(get_timer_speed_khz()/1000);
+	return read_c0_count() * 2;
 }