diff options
Diffstat (limited to 'drivers/cpuidle/cpuidle-qcom-spm.c')
| -rw-r--r-- | drivers/cpuidle/cpuidle-qcom-spm.c | 28 |
1 files changed, 24 insertions, 4 deletions
diff --git a/drivers/cpuidle/cpuidle-qcom-spm.c b/drivers/cpuidle/cpuidle-qcom-spm.c index 01e77913a414..beedf22cbe78 100644 --- a/drivers/cpuidle/cpuidle-qcom-spm.c +++ b/drivers/cpuidle/cpuidle-qcom-spm.c @@ -122,10 +122,6 @@ static int spm_cpuidle_register(struct device *cpuidle_dev, int cpu) if (ret <= 0) return ret ? : -ENODEV; - ret = qcom_scm_set_warm_boot_addr(cpu_resume_arm, cpumask_of(cpu)); - if (ret) - return ret; - return cpuidle_register(&data->cpuidle_driver, NULL); } @@ -136,6 +132,10 @@ static int spm_cpuidle_drv_probe(struct platform_device *pdev) if (!qcom_scm_is_available()) return -EPROBE_DEFER; + ret = qcom_scm_set_warm_boot_addr(cpu_resume_arm); + if (ret) + return dev_err_probe(&pdev->dev, ret, "set warm boot addr failed"); + for_each_possible_cpu(cpu) { ret = spm_cpuidle_register(&pdev->dev, cpu); if (ret && ret != -ENODEV) { @@ -155,6 +155,22 @@ static struct platform_driver spm_cpuidle_driver = { }, }; +static bool __init qcom_spm_find_any_cpu(void) +{ + struct device_node *cpu_node, *saw_node; + + for_each_of_cpu_node(cpu_node) { + saw_node = of_parse_phandle(cpu_node, "qcom,saw", 0); + if (of_device_is_available(saw_node)) { + of_node_put(saw_node); + of_node_put(cpu_node); + return true; + } + of_node_put(saw_node); + } + return false; +} + static int __init qcom_spm_cpuidle_init(void) { struct platform_device *pdev; @@ -164,6 +180,10 @@ static int __init qcom_spm_cpuidle_init(void) if (ret) return ret; + /* Make sure there is actually any CPU managed by the SPM */ + if (!qcom_spm_find_any_cpu()) + return 0; + pdev = platform_device_register_simple("qcom-spm-cpuidle", -1, NULL, 0); if (IS_ERR(pdev)) { |