Arthur Heymans submitted this change.
sb/intel/ibexpeak: Fix enabling HPET
RCBA_HPTC needs to be read back to properly work.
This fixes SeaBIOS endlessly waiting for input instead of booting the
default entry. Linux already fixes this itself.
Change-Id: I22b8b34924f2add2185ec46470c1559bf2fb6d58
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35757
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
---
M src/southbridge/intel/ibexpeak/lpc.c
1 file changed, 1 insertion(+), 0 deletions(-)
diff --git a/src/southbridge/intel/ibexpeak/lpc.c b/src/southbridge/intel/ibexpeak/lpc.c
index ec9b045..e433530 100644
--- a/src/southbridge/intel/ibexpeak/lpc.c
+++ b/src/southbridge/intel/ibexpeak/lpc.c
@@ -394,6 +394,7 @@
reg32 |= (1 << 7); // HPET Address Enable
reg32 &= ~(3 << 0);
RCBA32(HPTC) = reg32;
+ RCBA32(HPTC); /* Read back for it to work */
write32((u32 *)0xfed00010, read32((u32 *)0xfed00010) | 1);
}
To view, visit change 35757. To unsubscribe, or for help writing mail filters, visit settings.