[RFC PATCH v1 2/2] perf/smmuv3: To support the dts to get options

@@ -115,6 +115,16 @@ struct smmu_pmu {
 	bool global_filter;
 };
 
+struct smmu_pmu_prop {
+	u32 opt;
+	const char *prop;
+};
+
+static struct smmu_pmu_prop smmu_pmu_options[] = {
+	{ SMMU_PMCG_EVCNTR_RDONLY, "hisilicon,smmu-pmcg-evcntr-rdonly"},
+	{ 0, NULL},
+};
+
 #define to_smmu_pmu(p) (container_of(p, struct smmu_pmu, pmu))
 
 #define SMMU_PMU_EVENT_ATTR_EXTRACTOR(_name, _config, _start, _end)        \

@@ -708,6 +718,7 @@ static void smmu_pmu_reset(struct smmu_pmu *smmu_pmu)
 		       smmu_pmu->reloc_base + SMMU_PMCG_OVSCLR0);
 }
 
+#ifdef CONFIG_ACPI
 static void smmu_pmu_get_acpi_options(struct smmu_pmu *smmu_pmu)
 {
 	u32 model;

@@ -723,6 +734,26 @@ static void smmu_pmu_get_acpi_options(struct smmu_pmu *smmu_pmu)
 
 	dev_notice(smmu_pmu->dev, "option mask 0x%x\n", smmu_pmu->options);
 }
+#else
+static void smmu_pmu_get_acpi_options(struct smmu_pmu *smmu_pmu)
+{
+
+}
+#endif
+
+static void smmu_pmu_get_dt_options(struct smmu_pmu *smmu_pmu)
+{
+	int i = 0;
+
+	do {
+		if (of_property_read_bool(smmu_pmu->dev->of_node,
+					  smmu_pmu_options[i].prop)) {
+			smmu_pmu->options |= smmu_pmu_options[i].opt;
+			dev_notice(smmu_pmu->dev, "option mask 0x%x\n",
+				   smmu_pmu->options);
+		}
+	} while (smmu_pmu_options[++i].opt);
+}
 
 static int smmu_pmu_probe(struct platform_device *pdev)
 {

@@ -801,7 +832,10 @@ static int smmu_pmu_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	smmu_pmu_get_acpi_options(smmu_pmu);
+	if (dev->of_node)
+		smmu_pmu_get_dt_options(smmu_pmu);
+	else
+		smmu_pmu_get_acpi_options(smmu_pmu);
 
 	/* Pick one CPU to be the preferred one to use */
 	smmu_pmu->on_cpu = raw_smp_processor_id();

@@ -855,9 +889,15 @@ static void smmu_pmu_shutdown(struct platform_device *pdev)
 	smmu_pmu_disable(&smmu_pmu->pmu);
 }
 
+static const struct of_device_id smmu_pmu_of_match[] = {
+	{ .compatible = "arm-smmu-v3-pmcg", },
+	{ },
+};
+
 static struct platform_driver smmu_pmu_driver = {
 	.driver = {
 		.name = "arm-smmu-v3-pmcg",
+		.of_match_table = smmu_pmu_of_match,
 	},
 	.probe = smmu_pmu_probe,
 	.remove = smmu_pmu_remove,