sedi: hpet: keep waiting if main counter value is invalid

This commit is to keep waiting if HPET main counter value is invalid, which may happen after ISH just goes out of lowper power state. Avoid reading out an invalid HPET main counter value. Signed-off-by: Roger Wang <[email protected]> Signed-off-by: Dong Wang <[email protected]>
intel · Jun 11, 2024 · c1b41b0 · c1b41b0
1 parent 59ca937
commit c1b41b0
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/bsp_sedi/drivers/hpet/sedi_hpet.c b/bsp_sedi/drivers/hpet/sedi_hpet.c
@@ -34,6 +34,7 @@ SEDI_REG_DEFINE(HPET, MCV, 0x0f0, RW, (uint64_t)-1, (uint64_t)0x0);
 	 SEDI_RBFM(HPET, HPET_CTRL_STS, HPET_CTRL_STS8))
 #define CTRL_STS_TIMER1_COMPARATOR SEDI_RBFM(HPET, HPET_CTRL_STS, HPET_CTRL_STS9)
 #define CTRL_STS_TIMER2_COMPARATOR SEDI_RBFM(HPET, HPET_CTRL_STS, HPET_CTRL_STS10)
+#define CTRL_STS_MAIN_COUNTER_VALUE_INVALID SEDI_RBFM(HPET, HPET_CTRL_STS, HPET_CTRL_STS13)
 
 /*Macro for interrupt routing*/
 #define TIMER2_INT_ROUTE (0x0b)
@@ -157,6 +158,7 @@ uint64_t sedi_hpet_get_main_counter(void)
 	uint32_t highBits;
 	uint32_t lowBits;
 
+	wait_for_idle(CTRL_STS_MAIN_COUNTER_VALUE_INVALID);
 	do {
 		highBits = SEDI_REG_GET(HPET, MCV_HIGH);
 		lowBits = SEDI_REG_GET(HPET, MCV_LOW);