[coreboot-gerrit] Change in coreboot[master]: sb/intel/ibexpeak: Fix enabling HPET

[Arthur Heymans (Code Review)]

Arthur Heymans has submitted this change. ( https://review.coreboot.org/c/coreboot/+/35757 )

Change subject: sb/intel/ibexpeak: Fix enabling HPET
......................................................................

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 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35757
Reviewed-by: Angel Pons 
Reviewed-by: Patrick Rudolph 
Tested-by: build bot (Jenkins) 
---
M src/southbridge/intel/ibexpeak/lpc.c
1 file changed, 1 insertion(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Patrick Rudolph: Looks good to me, approved
  Angel Pons: Looks good to me, approved

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);
 }