[PATCH 1/2] cpufreq/amd-pstate: Export symbols for changing modes

Mario Limonciello
2024-09-01T02:49:34Z

In order to effectively test all mode switch combinations export
everything necessarily for amd-pstate-ut to trigger a mode switch.

Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
---
drivers/cpufreq/amd-pstate.c | 23 ++++++++++-------------
drivers/cpufreq/amd-pstate.h | 14 ++++++++++++++
2 files changed, 24 insertions(+), 13 deletions(-)

diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
index 073ca9caf52ac..93adde45bebce 100644
--- a/drivers/cpufreq/amd-pstate.c
+++ b/drivers/cpufreq/amd-pstate.c
@@ -60,18 +60,6 @@
#define AMD_CPPC_EPP_BALANCE_POWERSAVE 0xBF
#define AMD_CPPC_EPP_POWERSAVE 0xFF

-/*
- * enum amd_pstate_mode - driver working mode of amd pstate
- */
-enum amd_pstate_mode {
- AMD_PSTATE_UNDEFINED = 0,
- AMD_PSTATE_DISABLE,
- AMD_PSTATE_PASSIVE,
- AMD_PSTATE_ACTIVE,
- AMD_PSTATE_GUIDED,
- AMD_PSTATE_MAX,
-};
-
static const char * const amd_pstate_mode_string[] = {
[AMD_PSTATE_UNDEFINED] = "undefined",
[AMD_PSTATE_DISABLE] = "disable",
@@ -81,6 +69,14 @@ static const char * const amd_pstate_mode_string[] = {
NULL,
};

+const char *amd_pstate_get_mode_string(enum amd_pstate_mode mode)
+{
+ if (mode < 0 || mode >= AMD_PSTATE_MAX)
+ return NULL;
+ return amd_pstate_mode_string[mode];
+}
+EXPORT_SYMBOL_GPL(amd_pstate_get_mode_string);
+
struct quirk_entry {
u32 nominal_freq;
u32 lowest_freq;
@@ -1352,7 +1348,7 @@ static ssize_t amd_pstate_show_status(char *buf)
return sysfs_emit(buf, "%s\n", amd_pstate_mode_string[cppc_state]);
}

-static int amd_pstate_update_status(const char *buf, size_t size)
+int amd_pstate_update_status(const char *buf, size_t size)
{
int mode_idx;

@@ -1369,6 +1365,7 @@ static int amd_pstate_update_status(const char *buf, size_t size)

return 0;
}
+EXPORT_SYMBOL_GPL(amd_pstate_update_status);

static ssize_t status_show(struct device *dev,
struct device_attribute *attr, char *buf)
diff --git a/drivers/cpufreq/amd-pstate.h b/drivers/cpufreq/amd-pstate.h
index cc8bb2bc325aa..cd573bc6b6db8 100644
--- a/drivers/cpufreq/amd-pstate.h
+++ b/drivers/cpufreq/amd-pstate.h
@@ -103,4 +103,18 @@ struct amd_cpudata {
bool boost_state;
};

+/*
+ * enum amd_pstate_mode - driver working mode of amd pstate
+ */
+enum amd_pstate_mode {
+ AMD_PSTATE_UNDEFINED = 0,
+ AMD_PSTATE_DISABLE,
+ AMD_PSTATE_PASSIVE,
+ AMD_PSTATE_ACTIVE,
+ AMD_PSTATE_GUIDED,
+ AMD_PSTATE_MAX,
+};
+const char *amd_pstate_get_mode_string(enum amd_pstate_mode mode);
+int amd_pstate_update_status(const char *buf, size_t size);
+
#endif /* _LINUX_AMD_PSTATE_H */
--
2.43.0