diff options
Diffstat (limited to 'src/soc/intel/skylake/acpi')
| -rw-r--r-- | src/soc/intel/skylake/acpi/pcr.asl | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/soc/intel/skylake/acpi/pcr.asl b/src/soc/intel/skylake/acpi/pcr.asl index 4b8576b804..c73830fe46 100644 --- a/src/soc/intel/skylake/acpi/pcr.asl +++ b/src/soc/intel/skylake/acpi/pcr.asl @@ -53,6 +53,14 @@ Method (PCRA, 3, Serialized) DATA, 32 } And (DATA, Arg2, DATA) + + /* + * After every write one needs to read an innocuous register + * to ensure the writes are completed for certain ports. This is done + * for all ports so that the callers don't need the per-port knowledge + * for each transaction. + */ + PCRR (Arg0, Arg1) } /* @@ -69,4 +77,12 @@ Method (PCRO, 3, Serialized) DATA, 32 } Or (DATA, Arg2, DATA) + + /* + * After every write one needs to read an innocuous register + * to ensure the writes are completed for certain ports. This is done + * for all ports so that the callers don't need the per-port knowledge + * for each transaction. + */ + PCRR (Arg0, Arg1) } |