arm-cci: Refactor CCI PMU enable/disable methods
This patch refactors the CCI PMU driver code a little bit to
make it easier share the code for enabling/disabling the CCI
PMU. This will be used by the hooks to work around the special cases
where writing to a counter is not always that easy(e.g, CCI-500)
No functional changes.
Cc: Punit Agrawal <punit.agrawal@arm.com>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c
index 6a76ac7..e42842b 100644
--- a/drivers/bus/arm-cci.c
+++ b/drivers/bus/arm-cci.c
@@ -606,6 +606,26 @@
}
#endif /* CONFIG_ARM_CCI500_PMU */
+/* Should be called with cci_pmu->hw_events->pmu_lock held */
+static void __cci_pmu_enable(void)
+{
+ u32 val;
+
+ /* Enable all the PMU counters. */
+ val = readl_relaxed(cci_ctrl_base + CCI_PMCR) | CCI_PMCR_CEN;
+ writel(val, cci_ctrl_base + CCI_PMCR);
+}
+
+/* Should be called with cci_pmu->hw_events->pmu_lock held */
+static void __cci_pmu_disable(void)
+{
+ u32 val;
+
+ /* Disable all the PMU counters. */
+ val = readl_relaxed(cci_ctrl_base + CCI_PMCR) & ~CCI_PMCR_CEN;
+ writel(val, cci_ctrl_base + CCI_PMCR);
+}
+
static ssize_t cci_pmu_format_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@@ -895,16 +915,12 @@
struct cci_pmu_hw_events *hw_events = &cci_pmu->hw_events;
int enabled = bitmap_weight(hw_events->used_mask, cci_pmu->num_cntrs);
unsigned long flags;
- u32 val;
if (!enabled)
return;
raw_spin_lock_irqsave(&hw_events->pmu_lock, flags);
-
- /* Enable all the PMU counters. */
- val = readl_relaxed(cci_ctrl_base + CCI_PMCR) | CCI_PMCR_CEN;
- writel(val, cci_ctrl_base + CCI_PMCR);
+ __cci_pmu_enable();
raw_spin_unlock_irqrestore(&hw_events->pmu_lock, flags);
}
@@ -914,13 +930,9 @@
struct cci_pmu *cci_pmu = to_cci_pmu(pmu);
struct cci_pmu_hw_events *hw_events = &cci_pmu->hw_events;
unsigned long flags;
- u32 val;
raw_spin_lock_irqsave(&hw_events->pmu_lock, flags);
-
- /* Disable all the PMU counters. */
- val = readl_relaxed(cci_ctrl_base + CCI_PMCR) & ~CCI_PMCR_CEN;
- writel(val, cci_ctrl_base + CCI_PMCR);
+ __cci_pmu_disable();
raw_spin_unlock_irqrestore(&hw_events->pmu_lock, flags);
}