zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/drivers/acpi/fan.c b/ap/os/linux/linux-3.4.x/drivers/acpi/fan.c
new file mode 100644
index 0000000..0f0356c
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/acpi/fan.c
@@ -0,0 +1,230 @@
+/*
+ * acpi_fan.c - ACPI Fan Driver ($Revision: 29 $)
+ *
+ * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
+ * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.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.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <asm/uaccess.h>
+#include <linux/thermal.h>
+#include <acpi/acpi_bus.h>
+#include <acpi/acpi_drivers.h>
+
+#define PREFIX "ACPI: "
+
+#define ACPI_FAN_CLASS "fan"
+#define ACPI_FAN_FILE_STATE "state"
+
+#define _COMPONENT ACPI_FAN_COMPONENT
+ACPI_MODULE_NAME("fan");
+
+MODULE_AUTHOR("Paul Diefenbaugh");
+MODULE_DESCRIPTION("ACPI Fan Driver");
+MODULE_LICENSE("GPL");
+
+static int acpi_fan_add(struct acpi_device *device);
+static int acpi_fan_remove(struct acpi_device *device, int type);
+static int acpi_fan_suspend(struct acpi_device *device, pm_message_t state);
+static int acpi_fan_resume(struct acpi_device *device);
+
+static const struct acpi_device_id fan_device_ids[] = {
+ {"PNP0C0B", 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, fan_device_ids);
+
+static struct acpi_driver acpi_fan_driver = {
+ .name = "fan",
+ .class = ACPI_FAN_CLASS,
+ .ids = fan_device_ids,
+ .ops = {
+ .add = acpi_fan_add,
+ .remove = acpi_fan_remove,
+ .suspend = acpi_fan_suspend,
+ .resume = acpi_fan_resume,
+ },
+};
+
+/* thermal cooling device callbacks */
+static int fan_get_max_state(struct thermal_cooling_device *cdev, unsigned long
+ *state)
+{
+ /* ACPI fan device only support two states: ON/OFF */
+ *state = 1;
+ return 0;
+}
+
+static int fan_get_cur_state(struct thermal_cooling_device *cdev, unsigned long
+ *state)
+{
+ struct acpi_device *device = cdev->devdata;
+ int result;
+ int acpi_state;
+
+ if (!device)
+ return -EINVAL;
+
+ result = acpi_bus_update_power(device->handle, &acpi_state);
+ if (result)
+ return result;
+
+ *state = (acpi_state == ACPI_STATE_D3 ? 0 :
+ (acpi_state == ACPI_STATE_D0 ? 1 : -1));
+ return 0;
+}
+
+static int
+fan_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state)
+{
+ struct acpi_device *device = cdev->devdata;
+ int result;
+
+ if (!device || (state != 0 && state != 1))
+ return -EINVAL;
+
+ result = acpi_bus_set_power(device->handle,
+ state ? ACPI_STATE_D0 : ACPI_STATE_D3);
+
+ return result;
+}
+
+static const struct thermal_cooling_device_ops fan_cooling_ops = {
+ .get_max_state = fan_get_max_state,
+ .get_cur_state = fan_get_cur_state,
+ .set_cur_state = fan_set_cur_state,
+};
+
+/* --------------------------------------------------------------------------
+ Driver Interface
+ -------------------------------------------------------------------------- */
+
+static int acpi_fan_add(struct acpi_device *device)
+{
+ int result = 0;
+ struct thermal_cooling_device *cdev;
+
+ if (!device)
+ return -EINVAL;
+
+ strcpy(acpi_device_name(device), "Fan");
+ strcpy(acpi_device_class(device), ACPI_FAN_CLASS);
+
+ result = acpi_bus_update_power(device->handle, NULL);
+ if (result) {
+ printk(KERN_ERR PREFIX "Setting initial power state\n");
+ goto end;
+ }
+
+ cdev = thermal_cooling_device_register("Fan", device,
+ &fan_cooling_ops);
+ if (IS_ERR(cdev)) {
+ result = PTR_ERR(cdev);
+ goto end;
+ }
+
+ dev_dbg(&device->dev, "registered as cooling_device%d\n", cdev->id);
+
+ device->driver_data = cdev;
+ result = sysfs_create_link(&device->dev.kobj,
+ &cdev->device.kobj,
+ "thermal_cooling");
+ if (result)
+ dev_err(&device->dev, "Failed to create sysfs link "
+ "'thermal_cooling'\n");
+
+ result = sysfs_create_link(&cdev->device.kobj,
+ &device->dev.kobj,
+ "device");
+ if (result)
+ dev_err(&device->dev, "Failed to create sysfs link "
+ "'device'\n");
+
+ printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
+ acpi_device_name(device), acpi_device_bid(device),
+ !device->power.state ? "on" : "off");
+
+ end:
+ return result;
+}
+
+static int acpi_fan_remove(struct acpi_device *device, int type)
+{
+ struct thermal_cooling_device *cdev = acpi_driver_data(device);
+
+ if (!device || !cdev)
+ return -EINVAL;
+
+ sysfs_remove_link(&device->dev.kobj, "thermal_cooling");
+ sysfs_remove_link(&cdev->device.kobj, "device");
+ thermal_cooling_device_unregister(cdev);
+
+ return 0;
+}
+
+static int acpi_fan_suspend(struct acpi_device *device, pm_message_t state)
+{
+ if (!device)
+ return -EINVAL;
+
+ acpi_bus_set_power(device->handle, ACPI_STATE_D0);
+
+ return AE_OK;
+}
+
+static int acpi_fan_resume(struct acpi_device *device)
+{
+ int result;
+
+ if (!device)
+ return -EINVAL;
+
+ result = acpi_bus_update_power(device->handle, NULL);
+ if (result)
+ printk(KERN_ERR PREFIX "Error updating fan power state\n");
+
+ return result;
+}
+
+static int __init acpi_fan_init(void)
+{
+ int result = 0;
+
+ result = acpi_bus_register_driver(&acpi_fan_driver);
+ if (result < 0)
+ return -ENODEV;
+
+ return 0;
+}
+
+static void __exit acpi_fan_exit(void)
+{
+
+ acpi_bus_unregister_driver(&acpi_fan_driver);
+
+ return;
+}
+
+module_init(acpi_fan_init);
+module_exit(acpi_fan_exit);