Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / thermal / db8500_cpufreq_cooling.c

diff --git a/kernel/drivers/thermal/db8500_cpufreq_cooling.c b/kernel/drivers/thermal/db8500_cpufreq_cooling.c
new file mode 100644 (file)
index 0000000..607b62c
--- /dev/null
+++ b/kernel/drivers/thermal/db8500_cpufreq_cooling.c
@@ -0,0 +1,104 @@
+/*
+ * db8500_cpufreq_cooling.c - DB8500 cpufreq works as cooling device.
+ *
+ * Copyright (C) 2012 ST-Ericsson
+ * Copyright (C) 2012 Linaro Ltd.
+ *
+ * Author: Hongbo Zhang <hongbo.zhang@linaro.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/cpu_cooling.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+static int db8500_cpufreq_cooling_probe(struct platform_device *pdev)
+{
+       struct thermal_cooling_device *cdev;
+
+       cdev = cpufreq_cooling_register(cpu_present_mask);
+       if (IS_ERR(cdev)) {
+               int ret = PTR_ERR(cdev);
+
+               if (ret != -EPROBE_DEFER)
+                       dev_err(&pdev->dev,
+                               "Failed to register cooling device %d\n",
+                               ret);
+                               
+               return ret;
+       }
+
+       platform_set_drvdata(pdev, cdev);
+
+       dev_info(&pdev->dev, "Cooling device registered: %s\n", cdev->type);
+
+       return 0;
+}
+
+static int db8500_cpufreq_cooling_remove(struct platform_device *pdev)
+{
+       struct thermal_cooling_device *cdev = platform_get_drvdata(pdev);
+
+       cpufreq_cooling_unregister(cdev);
+
+       return 0;
+}
+
+static int db8500_cpufreq_cooling_suspend(struct platform_device *pdev,
+               pm_message_t state)
+{
+       return -ENOSYS;
+}
+
+static int db8500_cpufreq_cooling_resume(struct platform_device *pdev)
+{
+       return -ENOSYS;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id db8500_cpufreq_cooling_match[] = {
+       { .compatible = "stericsson,db8500-cpufreq-cooling" },
+       {},
+};
+#endif
+
+static struct platform_driver db8500_cpufreq_cooling_driver = {
+       .driver = {
+               .name = "db8500-cpufreq-cooling",
+               .of_match_table = of_match_ptr(db8500_cpufreq_cooling_match),
+       },
+       .probe = db8500_cpufreq_cooling_probe,
+       .suspend = db8500_cpufreq_cooling_suspend,
+       .resume = db8500_cpufreq_cooling_resume,
+       .remove = db8500_cpufreq_cooling_remove,
+};
+
+static int __init db8500_cpufreq_cooling_init(void)
+{
+       return platform_driver_register(&db8500_cpufreq_cooling_driver);
+}
+
+static void __exit db8500_cpufreq_cooling_exit(void)
+{
+       platform_driver_unregister(&db8500_cpufreq_cooling_driver);
+}
+
+/* Should be later than db8500_cpufreq_register */
+late_initcall(db8500_cpufreq_cooling_init);
+module_exit(db8500_cpufreq_cooling_exit);
+
+MODULE_AUTHOR("Hongbo Zhang <hongbo.zhang@stericsson.com>");
+MODULE_DESCRIPTION("DB8500 cpufreq cooling driver");
+MODULE_LICENSE("GPL");