drivers: cci: Export CCI PMU revision
authorPunit Agrawal <punit.agrawal@arm.com>
Wed, 19 Feb 2014 12:17:03 +0000 (12:17 +0000)
committerArnd Bergmann <arnd@arndb.de>
Tue, 25 Feb 2014 18:36:17 +0000 (19:36 +0100)
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>
drivers/bus/arm-cci.c

index da485ae..5a86da9 100644 (file)
@@ -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 @@ static struct pmu_port_event_ranges port_event_range[] = {
        },
 };
 
+/*
+ * 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 void pmu_write_counter(struct perf_event *event, u32 value)
 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,