Revert "switch: switch class and GPIO drivers."

[firefly-linux-kernel-4.4.55.git] / drivers / switch / switch_class.c

diff --git a/drivers/switch/switch_class.c b/drivers/switch/switch_class.c
deleted file mode 100644 (file)
index e05fc25..0000000
--- a/drivers/switch/switch_class.c
+++ /dev/null
@@ -1,174 +0,0 @@
-/*
- *  drivers/switch/switch_class.c
- *
- * Copyright (C) 2008 Google, Inc.
- * Author: Mike Lockwood <lockwood@android.com>
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * 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/module.h>
-#include <linux/types.h>
-#include <linux/init.h>
-#include <linux/device.h>
-#include <linux/fs.h>
-#include <linux/err.h>
-#include <linux/switch.h>
-
-struct class *switch_class;
-static atomic_t device_count;
-
-static ssize_t state_show(struct device *dev, struct device_attribute *attr,
-               char *buf)
-{
-       struct switch_dev *sdev = (struct switch_dev *)
-               dev_get_drvdata(dev);
-
-       if (sdev->print_state) {
-               int ret = sdev->print_state(sdev, buf);
-               if (ret >= 0)
-                       return ret;
-       }
-       return sprintf(buf, "%d\n", sdev->state);
-}
-
-static ssize_t name_show(struct device *dev, struct device_attribute *attr,
-               char *buf)
-{
-       struct switch_dev *sdev = (struct switch_dev *)
-               dev_get_drvdata(dev);
-
-       if (sdev->print_name) {
-               int ret = sdev->print_name(sdev, buf);
-               if (ret >= 0)
-                       return ret;
-       }
-       return sprintf(buf, "%s\n", sdev->name);
-}
-
-static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, state_show, NULL);
-static DEVICE_ATTR(name, S_IRUGO | S_IWUSR, name_show, NULL);
-
-void switch_set_state(struct switch_dev *sdev, int state)
-{
-       char name_buf[120];
-       char state_buf[120];
-       char *prop_buf;
-       char *envp[3];
-       int env_offset = 0;
-       int length;
-
-       if (sdev->state != state) {
-               sdev->state = state;
-
-               prop_buf = (char *)get_zeroed_page(GFP_KERNEL);
-               if (prop_buf) {
-                       length = name_show(sdev->dev, NULL, prop_buf);
-                       if (length > 0) {
-                               if (prop_buf[length - 1] == '\n')
-                                       prop_buf[length - 1] = 0;
-                               snprintf(name_buf, sizeof(name_buf),
-                                       "SWITCH_NAME=%s", prop_buf);
-                               envp[env_offset++] = name_buf;
-                       }
-                       length = state_show(sdev->dev, NULL, prop_buf);
-                       if (length > 0) {
-                               if (prop_buf[length - 1] == '\n')
-                                       prop_buf[length - 1] = 0;
-                               snprintf(state_buf, sizeof(state_buf),
-                                       "SWITCH_STATE=%s", prop_buf);
-                               envp[env_offset++] = state_buf;
-                       }
-                       envp[env_offset] = NULL;
-                       kobject_uevent_env(&sdev->dev->kobj, KOBJ_CHANGE, envp);
-                       free_page((unsigned long)prop_buf);
-               } else {
-                       printk(KERN_ERR "out of memory in switch_set_state\n");
-                       kobject_uevent(&sdev->dev->kobj, KOBJ_CHANGE);
-               }
-       }
-}
-EXPORT_SYMBOL_GPL(switch_set_state);
-
-static int create_switch_class(void)
-{
-       if (!switch_class) {
-               switch_class = class_create(THIS_MODULE, "switch");
-               if (IS_ERR(switch_class))
-                       return PTR_ERR(switch_class);
-               atomic_set(&device_count, 0);
-       }
-
-       return 0;
-}
-
-int switch_dev_register(struct switch_dev *sdev)
-{
-       int ret;
-
-       if (!switch_class) {
-               ret = create_switch_class();
-               if (ret < 0)
-                       return ret;
-       }
-
-       sdev->index = atomic_inc_return(&device_count);
-       sdev->dev = device_create(switch_class, NULL,
-               MKDEV(0, sdev->index), NULL, sdev->name);
-       if (IS_ERR(sdev->dev))
-               return PTR_ERR(sdev->dev);
-
-       ret = device_create_file(sdev->dev, &dev_attr_state);
-       if (ret < 0)
-               goto err_create_file_1;
-       ret = device_create_file(sdev->dev, &dev_attr_name);
-       if (ret < 0)
-               goto err_create_file_2;
-
-       dev_set_drvdata(sdev->dev, sdev);
-       sdev->state = 0;
-       return 0;
-
-err_create_file_2:
-       device_remove_file(sdev->dev, &dev_attr_state);
-err_create_file_1:
-       device_destroy(switch_class, MKDEV(0, sdev->index));
-       printk(KERN_ERR "switch: Failed to register driver %s\n", sdev->name);
-
-       return ret;
-}
-EXPORT_SYMBOL_GPL(switch_dev_register);
-
-void switch_dev_unregister(struct switch_dev *sdev)
-{
-       device_remove_file(sdev->dev, &dev_attr_name);
-       device_remove_file(sdev->dev, &dev_attr_state);
-       device_destroy(switch_class, MKDEV(0, sdev->index));
-       dev_set_drvdata(sdev->dev, NULL);
-}
-EXPORT_SYMBOL_GPL(switch_dev_unregister);
-
-static int __init switch_class_init(void)
-{
-       return create_switch_class();
-}
-
-static void __exit switch_class_exit(void)
-{
-       class_destroy(switch_class);
-}
-
-module_init(switch_class_init);
-module_exit(switch_class_exit);
-
-MODULE_AUTHOR("Mike Lockwood <lockwood@android.com>");
-MODULE_DESCRIPTION("Switch class driver");
-MODULE_LICENSE("GPL");