soc/intel/*: Allow configuring 8254 timer via CMOS
Currently, the `USE_LEGACY_8254_TIMER` Kconfig option is the only way
to enable or disable the legacy 8254 timer. Add the `legacy_8254_timer`
CMOS option to allow enabling and disabling the 8254 timer without
having to rebuild and reflash coreboot. If options are not enabled or
the option is missing in cmos.layout, the Kconfig setting is used.
Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Change-Id: Ic82c7f25cdf6587de5c40f59441579cfc92ff2f1
Reviewed-on: https://review.coreboot.org/c/coreboot/+/56256
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>
diff --git a/src/soc/intel/alderlake/fsp_params.c b/src/soc/intel/alderlake/fsp_params.c
index 489935d..f6a88ec 100644
--- a/src/soc/intel/alderlake/fsp_params.c
+++ b/src/soc/intel/alderlake/fsp_params.c
@@ -8,6 +8,7 @@
#include <fsp/api.h>
#include <fsp/ppi/mp_service_ppi.h>
#include <fsp/util.h>
+#include <option.h>
#include <intelblocks/irq.h>
#include <intelblocks/lpss.h>
#include <intelblocks/xdci.h>
@@ -21,6 +22,7 @@
#include <soc/soc_chip.h>
#include <stdlib.h>
#include <string.h>
+#include <types.h>
/* THC assignment definition */
#define THC_NONE 0
@@ -533,8 +535,9 @@
const struct soc_intel_alderlake_config *config)
{
/* Legacy 8254 timer support */
- s_cfg->Enable8254ClockGating = !CONFIG(USE_LEGACY_8254_TIMER);
- s_cfg->Enable8254ClockGatingOnS3 = !CONFIG(USE_LEGACY_8254_TIMER);
+ bool use_8254 = get_uint_option("legacy_8254_timer", CONFIG(USE_LEGACY_8254_TIMER));
+ s_cfg->Enable8254ClockGating = !use_8254;
+ s_cfg->Enable8254ClockGatingOnS3 = !use_8254;
}
static void fill_fsps_storage_params(FSP_S_CONFIG *s_cfg,