CPC_SUP_BUFFER_ONLY ensures that an expected BUFFER only register has a
register type of ACPI_TYPE_BUFFER and is not NULL.
Signed-off-by: Janakarajan Natarajan <janakarajan.natara...@amd.com>
---
drivers/acpi/cppc_acpi.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c
index d4244e7d0e38..56a09e057c4f 100644
--- a/drivers/acpi/cppc_acpi.c
+++ b/drivers/acpi/cppc_acpi.c
@@ -115,6 +115,14 @@ static DEFINE_PER_CPU(struct cpc_desc *, cpc_desc_ptr);
#define CPC_SUPPORTED(cpc) ((cpc)->type == ACPI_TYPE_INTEGER ? \
!!(cpc)->cpc_entry.int_value : \
!IS_NULL_REG(&(cpc)->cpc_entry.reg))
+
+/*
+ * Evaluates to True if an optional cpc field is supported and is
+ * BUFFER only
+ */
+#define CPC_SUP_BUFFER_ONLY(cpc) ((cpc)->type == ACPI_TYPE_BUFFER && \
+ !IS_NULL_REG(&(cpc)->cpc_entry.reg))
+
/*
* Arbitrary Retries in case the remote processor is slow to respond
* to PCC commands. Keeping it high enough to cover emulators where
--
2.17.1
