[coreboot-gerrit] Change in coreboot[master]: drivers/pc80/pc/i8254.c: Drop CAR_GLOBAL_MIGRATION support

[Patrick Georgi (Code Review)]

Patrick Georgi has submitted this change. ( https://review.coreboot.org/c/coreboot/+/37045 )

Change subject: drivers/pc80/pc/i8254.c: Drop CAR_GLOBAL_MIGRATION support
......................................................................

drivers/pc80/pc/i8254.c: Drop CAR_GLOBAL_MIGRATION support

Change-Id: Ibe9b353ce050b4718e07bccb958dbe3d2312e741
Signed-off-by: Arthur Heymans 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37045
Reviewed-by: Kyösti Mälkki 
Reviewed-by: HAOUAS Elyes 
Tested-by: build bot (Jenkins) 
---
M src/drivers/pc80/pc/i8254.c
1 file changed, 7 insertions(+), 12 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Kyösti Mälkki: Looks good to me, approved
  HAOUAS Elyes: Looks good to me, but someone else must approve

diff --git a/src/drivers/pc80/pc/i8254.c b/src/drivers/pc80/pc/i8254.c
index 5090f0c..9d23d46 100644
--- a/src/drivers/pc80/pc/i8254.c
+++ b/src/drivers/pc80/pc/i8254.c
@@ -11,7 +11,6 @@
  * GNU General Public License for more details.
  */

-#include <arch/early_variables.h>
 #include <arch/io.h>
 #include <commonlib/helpers.h>
 #include <cpu/x86/tsc.h>
@@ -107,23 +106,19 @@
 }

#if CONFIG(UNKNOWN_TSC_RATE)
-static u32 g_timer_tsc CAR_GLOBAL;
+static u32 g_timer_tsc;

unsigned long tsc_freq_mhz(void)
 {
-	u32 tsc;
+	if (g_timer_tsc > 0)
+		return g_timer_tsc;

-	tsc = car_get_var(g_timer_tsc);
-	if (tsc > 0)
-		return tsc;
-
-	tsc = calibrate_tsc_with_pit();
+	g_timer_tsc = calibrate_tsc_with_pit();

/* Set some semi-ridiculous rate if approximation fails. */
-	if (tsc == 0)
-		tsc = 5000;
+	if (g_timer_tsc == 0)
+		g_timer_tsc = 5000;

-	car_set_var(g_timer_tsc, tsc);
-	return tsc;
+	return g_timer_tsc;
 }
 #endif