int arm_pmu_device_probe(struct platform_device *pdev,
const struct of_device_id *of_table,
const struct pmu_probe_info *probe_table)
{
const struct of_device_id *of_id;
armpmu_init_fn init_fn;
struct device_node *node = pdev->dev.of_node;
struct arm_pmu *pmu;
int ret = -ENODEV;
pmu = armpmu_alloc();
if (!pmu)
return -ENOMEM;
pmu->plat_device = pdev;
ret = pmu_parse_irqs(pmu);
if (ret)
goto out_free;
if (node && (of_id = of_match_node(of_table, pdev->dev.of_node))) {
init_fn = of_id->data;
pmu->secure_access = of_property_read_bool(pdev->dev.of_node,
"secure-reg-access");
/* arm64 systems boot only as non-secure */
if (IS_ENABLED(CONFIG_ARM64) && pmu->secure_access) {
pr_warn("ignoring \"secure-reg-access\" property for arm64\n");
pmu->secure_access = false;
}
ret = init_fn(pmu);
} else if (probe_table) {
cpumask_setall(&pmu->supported_cpus);
ret = probe_current_pmu(pmu, probe_table);
}
if (ret) {
pr_info("%pOF: failed to probe PMU!\n", node);
goto out_free;
}
ret = armpmu_request_irqs(pmu);
if (ret)
goto out_free_irqs;
ret = armpmu_register(pmu);
if (ret)
goto out_free;
return 0;
out_free_irqs:
armpmu_free_irqs(pmu);
out_free:
pr_info("%pOF: failed to register PMU devices!\n", node);
armpmu_free(pmu);
return ret;
}
static int cpu_pmu_device_probe(struct platform_device *pdev)
{
const struct of_device_id *of_id;
const int (*init_fn)(struct arm_pmu *);
struct device_node *node = pdev->dev.of_node;
struct arm_pmu *pmu;
int ret = -ENODEV;
if (cpu_pmu) {
pr_info("attempt to register multiple PMU devices!\n");
return -ENOSPC;
}
pmu = kzalloc(sizeof(struct arm_pmu), GFP_KERNEL);
if (!pmu) {
pr_info("failed to allocate PMU device!\n");
return -ENOMEM;
}
cpu_pmu = pmu;
cpu_pmu->plat_device = pdev;
if (node && (of_id = of_match_node(cpu_pmu_of_device_ids, pdev->dev.of_node))) {
init_fn = of_id->data;
ret = of_pmu_irq_cfg(pdev);
if (!ret)
ret = init_fn(pmu);
} else {
ret = probe_current_pmu(pmu);
}
if (ret) {
pr_info("failed to probe PMU!\n");
goto out_free;
}
ret = cpu_pmu_init(cpu_pmu);
if (ret)
goto out_free;
ret = armpmu_register(cpu_pmu, -1);
if (ret)
goto out_destroy;
return 0;
out_destroy:
cpu_pmu_destroy(cpu_pmu);
out_free:
pr_info("failed to register PMU devices!\n");
kfree(pmu);
return ret;
}