ACPI: CPPC: Rename EPP constants for clarity

Update EPP (Energy Performance Preference) constants for more clarity:

 - Add CPPC_EPP_PERFORMANCE_PREF (0x00) for performance preference.

 - Rename CPPC_ENERGY_PERF_MAX to CPPC_EPP_ENERGY_EFFICIENCY_PREF (0xFF)
   for energy efficiency.

Signed-off-by: Sumit Gupta <sumitg@nvidia.com>
Reviewed-by: Lifeng Zheng <zhenglifeng1@huawei.com>
[ rjw: Changelog edits ]
Link: https://patch.msgid.link/20260120145623.2959636-4-sumitg@nvidia.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c
index e66e20d1f31b764887f045c5e4a472c2f68bf885..c67494939f7bc503477ea0f75e06292eb0d7a4df 100644 (file)
--- a/drivers/acpi/cppc_acpi.c
+++ b/drivers/acpi/cppc_acpi.c
@@ -1609,7 +1609,7 @@ EXPORT_SYMBOL_GPL(cppc_set_epp_perf);
  */
 int cppc_set_epp(int cpu, u64 epp_val)
 {
-       if (epp_val > CPPC_ENERGY_PERF_MAX)
+       if (epp_val > CPPC_EPP_ENERGY_EFFICIENCY_PREF)
                return -EINVAL;
 
        return cppc_set_reg_val(cpu, ENERGY_PERF, epp_val);

diff --git a/include/acpi/cppc_acpi.h b/include/acpi/cppc_acpi.h
index a090b010f5f151f8bf40f0ed930ddb7a01d09729..44d41ecb1b1d65d038b6ad1a15d3c901abda0ff4 100644 (file)
--- a/include/acpi/cppc_acpi.h
+++ b/include/acpi/cppc_acpi.h
@@ -39,7 +39,8 @@
 /* CPPC_AUTO_ACT_WINDOW_MAX_SIG is 127, so 128 and 129 will decay to 127 when writing */
 #define CPPC_AUTO_ACT_WINDOW_SIG_CARRY_THRESH 129
 
-#define CPPC_ENERGY_PERF_MAX   (0xFF)
+#define CPPC_EPP_PERFORMANCE_PREF              0x00
+#define CPPC_EPP_ENERGY_EFFICIENCY_PREF                0xFF
 
 /* Each register has the folowing format. */
 struct cpc_reg {