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-rw-r--r--src/soc/intel/cannonlake/pmutil.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/src/soc/intel/cannonlake/pmutil.c b/src/soc/intel/cannonlake/pmutil.c
index 6708781fa5..ebd3d61cc8 100644
--- a/src/soc/intel/cannonlake/pmutil.c
+++ b/src/soc/intel/cannonlake/pmutil.c
@@ -22,11 +22,13 @@
#define __SIMPLE_DEVICE__
#include <arch/io.h>
+#include <cbmem.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_def.h>
#include <console/console.h>
#include <intelblocks/pmclib.h>
+#include <intelblocks/rtc.h>
#include <halt.h>
#include <rules.h>
#include <stdlib.h>
@@ -188,3 +190,20 @@ void soc_get_gpe_configs(uint8_t *dw0, uint8_t *dw1, uint8_t *dw2)
*dw1 = config->gpe0_dw1;
*dw2 = config->gpe0_dw2;
}
+
+static int rtc_failed(uint32_t gen_pmcon_b)
+{
+ return !!(gen_pmcon_b & RTC_BATTERY_DEAD);
+}
+
+int soc_get_rtc_failed(void)
+{
+ const struct chipset_power_state *ps = cbmem_find(CBMEM_ID_POWER_STATE);
+
+ if (!ps) {
+ printk(BIOS_ERR, "Could not find power state in cbmem, RTC init aborted\n");
+ return 1;
+ }
+
+ return rtc_failed(ps->gen_pmcon_b);
+}