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Diffstat (limited to 'arch/x86/lib/tsc_timer.c')
-rw-r--r--arch/x86/lib/tsc_timer.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/arch/x86/lib/tsc_timer.c b/arch/x86/lib/tsc_timer.c
index fb9afed18f..7f5ba2ca6f 100644
--- a/arch/x86/lib/tsc_timer.c
+++ b/arch/x86/lib/tsc_timer.c
@@ -78,7 +78,7 @@ static int match_cpu(u8 family, u8 model)
*
* Returns the calibration value or 0 if MSR calibration failed.
*/
-static unsigned long try_msr_calibrate_tsc(void)
+static unsigned long __maybe_unused try_msr_calibrate_tsc(void)
{
u32 lo, hi, ratio, freq_id, freq;
unsigned long res;
@@ -199,7 +199,7 @@ static inline int pit_expect_msb(unsigned char val, u64 *tscp,
#define MAX_QUICK_PIT_MS 50
#define MAX_QUICK_PIT_ITERATIONS (MAX_QUICK_PIT_MS * PIT_TICK_RATE / 1000 / 256)
-static unsigned long quick_pit_calibrate(void)
+static unsigned long __maybe_unused quick_pit_calibrate(void)
{
int i;
u64 tsc, delta;
@@ -306,6 +306,9 @@ unsigned __attribute__((no_instrument_function)) long get_tbclk_mhz(void)
if (gd->arch.tsc_mhz)
return gd->arch.tsc_mhz;
+#ifdef CONFIG_TSC_CALIBRATION_BYPASS
+ fast_calibrate = CONFIG_TSC_FREQ_IN_MHZ;
+#else
fast_calibrate = try_msr_calibrate_tsc();
if (!fast_calibrate) {
@@ -313,6 +316,7 @@ unsigned __attribute__((no_instrument_function)) long get_tbclk_mhz(void)
if (!fast_calibrate)
panic("TSC frequency is ZERO");
}
+#endif
gd->arch.tsc_mhz = fast_calibrate;
return fast_calibrate;
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