drivers: cci: Export CCI PMU revision
The event numbering changed between revision r0 and r1 of the CCI
PMU. Expose this to userspace to allow tooling to handle the
differences in event numbers.
Suggested-by: Drew Richardson <Drew.Richardson@arm.com>
Signed-off-by: Punit Agrawal <punit.agrawal@arm.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c
index da485ae..5a86da9 100644
--- a/drivers/bus/arm-cci.c
+++ b/drivers/bus/arm-cci.c
@@ -31,7 +31,6 @@
#define DRIVER_NAME "CCI-400"
#define DRIVER_NAME_PMU DRIVER_NAME " PMU"
-#define PMU_NAME "CCI_400"
#define CCI_PORT_CTRL 0x0
#define CCI_CTRL_STATUS 0xc
@@ -162,6 +161,15 @@
},
};
+/*
+ * Export different PMU names for the different revisions so userspace knows
+ * because the event ids are different
+ */
+static char *const pmu_names[] = {
+ [CCI_REV_R0] = "CCI_400",
+ [CCI_REV_R1] = "CCI_400_r1",
+};
+
struct cci_pmu_drv_data {
void __iomem *base;
struct arm_pmu *cci_pmu;
@@ -520,7 +528,7 @@
static int cci_pmu_init(struct arm_pmu *cci_pmu, struct platform_device *pdev)
{
*cci_pmu = (struct arm_pmu){
- .name = PMU_NAME,
+ .name = pmu_names[probe_cci_revision()],
.max_period = (1LLU << 32) - 1,
.get_hw_events = pmu_get_hw_events,
.get_event_idx = pmu_get_event_idx,