diff mbox series

[v4,1/6] ACPI: CPPC: Add IS_OPTIONAL_CPC_REG macro

Message ID 20250113122104.3870673-2-zhenglifeng1@huawei.com
State New
Headers show
Series Support for autonomous selection in cppc_cpufreq | expand

Commit Message

zhenglifeng (A) Jan. 13, 2025, 12:20 p.m. UTC 
Add IS_OPTIONAL_CPC_REG macro to judge if a cpc_reg is an optional one.

Signed-off-by: Lifeng Zheng <zhenglifeng1@huawei.com>
---
 drivers/acpi/cppc_acpi.c | 6 ++++++
 1 file changed, 6 insertions(+)
diff mbox series

Patch

diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c
index f193e713825a..6454b469338f 100644
--- a/drivers/acpi/cppc_acpi.c
+++ b/drivers/acpi/cppc_acpi.c
@@ -129,6 +129,12 @@  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))
+
+/* These indicate optional of the per-cpu cpc_regs[]. */
+#define REG_OPTIONAL (0b111111100011111010000)
+
+#define IS_OPTIONAL_CPC_REG(reg_idx) (REG_OPTIONAL & (1U << (reg_idx)))
+
 /*
  * Arbitrary Retries in case the remote processor is slow to respond
  * to PCC commands. Keeping it high enough to cover emulators where