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authorDmitry Shmidt <dimitrysh@google.com>2016-04-19 12:37:47 -0700
committerAmit Pundir <amit.pundir@linaro.org>2016-05-19 12:32:41 +0530
commitc631c9800f20373ddafff77ce19844e78d2d2d9d (patch)
tree6c94adbced3c5296de70c6754dcff3878d207ef0
parentd18fffdddbf0a395440cd8e8e2578d322c8f0dbd (diff)
downloadlinux-linaro-stable-c631c9800f20373ddafff77ce19844e78d2d2d9d.tar.gz
Revert "switch: switch class and GPIO drivers."
Drivers should use extcon moving forward. Documentation/extcon/porting-android-switch-class describes how to port existing switch class drivers to extcon. This reverts commit e4b8e66e0ae2e78e913d7b86f2507fdb0aa731b4. Change-Id: I5b622c7ab4c0cb9670f8903f259a99888f503c1a
-rw-r--r--drivers/Kconfig2
-rw-r--r--drivers/Makefile1
-rw-r--r--drivers/switch/Kconfig15
-rw-r--r--drivers/switch/Makefile4
-rw-r--r--drivers/switch/switch_class.c174
-rw-r--r--drivers/switch/switch_gpio.c172
-rw-r--r--include/linux/switch.h53
7 files changed, 0 insertions, 421 deletions
diff --git a/drivers/Kconfig b/drivers/Kconfig
index 3c363e559864..d2ac339de85f 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -104,8 +104,6 @@ source "drivers/memstick/Kconfig"
source "drivers/leds/Kconfig"
-source "drivers/switch/Kconfig"
-
source "drivers/accessibility/Kconfig"
source "drivers/infiniband/Kconfig"
diff --git a/drivers/Makefile b/drivers/Makefile
index 8acfb530993d..795d0ca714bf 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -122,7 +122,6 @@ obj-$(CONFIG_CPU_IDLE) += cpuidle/
obj-y += mmc/
obj-$(CONFIG_MEMSTICK) += memstick/
obj-y += leds/
-obj-$(CONFIG_SWITCH) += switch/
obj-$(CONFIG_INFINIBAND) += infiniband/
obj-$(CONFIG_SGI_SN) += sn/
obj-y += firmware/
diff --git a/drivers/switch/Kconfig b/drivers/switch/Kconfig
deleted file mode 100644
index 19404b6f7778..000000000000
--- a/drivers/switch/Kconfig
+++ /dev/null
@@ -1,15 +0,0 @@
-menuconfig SWITCH
- tristate "Switch class support"
- help
- Say Y here to enable switch class support. This allows
- monitoring switches by userspace via sysfs and uevent.
-
-if SWITCH
-
-config SWITCH_GPIO
- tristate "GPIO Swith support"
- depends on GPIOLIB
- help
- Say Y here to enable GPIO based switch support.
-
-endif # SWITCH
diff --git a/drivers/switch/Makefile b/drivers/switch/Makefile
deleted file mode 100644
index f7606ed4a719..000000000000
--- a/drivers/switch/Makefile
+++ /dev/null
@@ -1,4 +0,0 @@
-# Switch Class Driver
-obj-$(CONFIG_SWITCH) += switch_class.o
-obj-$(CONFIG_SWITCH_GPIO) += switch_gpio.o
-
diff --git a/drivers/switch/switch_class.c b/drivers/switch/switch_class.c
deleted file mode 100644
index e05fc2591147..000000000000
--- 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");
diff --git a/drivers/switch/switch_gpio.c b/drivers/switch/switch_gpio.c
deleted file mode 100644
index 621d62d20c99..000000000000
--- a/drivers/switch/switch_gpio.c
+++ /dev/null
@@ -1,172 +0,0 @@
-/*
- * drivers/switch/switch_gpio.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/kernel.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-#include <linux/switch.h>
-#include <linux/workqueue.h>
-#include <linux/gpio.h>
-
-struct gpio_switch_data {
- struct switch_dev sdev;
- unsigned gpio;
- const char *name_on;
- const char *name_off;
- const char *state_on;
- const char *state_off;
- int irq;
- struct work_struct work;
-};
-
-static void gpio_switch_work(struct work_struct *work)
-{
- int state;
- struct gpio_switch_data *data =
- container_of(work, struct gpio_switch_data, work);
-
- state = gpio_get_value(data->gpio);
- switch_set_state(&data->sdev, state);
-}
-
-static irqreturn_t gpio_irq_handler(int irq, void *dev_id)
-{
- struct gpio_switch_data *switch_data =
- (struct gpio_switch_data *)dev_id;
-
- schedule_work(&switch_data->work);
- return IRQ_HANDLED;
-}
-
-static ssize_t switch_gpio_print_state(struct switch_dev *sdev, char *buf)
-{
- struct gpio_switch_data *switch_data =
- container_of(sdev, struct gpio_switch_data, sdev);
- const char *state;
- if (switch_get_state(sdev))
- state = switch_data->state_on;
- else
- state = switch_data->state_off;
-
- if (state)
- return sprintf(buf, "%s\n", state);
- return -1;
-}
-
-static int gpio_switch_probe(struct platform_device *pdev)
-{
- struct gpio_switch_platform_data *pdata = pdev->dev.platform_data;
- struct gpio_switch_data *switch_data;
- int ret = 0;
-
- if (!pdata)
- return -EBUSY;
-
- switch_data = kzalloc(sizeof(struct gpio_switch_data), GFP_KERNEL);
- if (!switch_data)
- return -ENOMEM;
-
- switch_data->sdev.name = pdata->name;
- switch_data->gpio = pdata->gpio;
- switch_data->name_on = pdata->name_on;
- switch_data->name_off = pdata->name_off;
- switch_data->state_on = pdata->state_on;
- switch_data->state_off = pdata->state_off;
- switch_data->sdev.print_state = switch_gpio_print_state;
-
- ret = switch_dev_register(&switch_data->sdev);
- if (ret < 0)
- goto err_switch_dev_register;
-
- ret = gpio_request(switch_data->gpio, pdev->name);
- if (ret < 0)
- goto err_request_gpio;
-
- ret = gpio_direction_input(switch_data->gpio);
- if (ret < 0)
- goto err_set_gpio_input;
-
- INIT_WORK(&switch_data->work, gpio_switch_work);
-
- switch_data->irq = gpio_to_irq(switch_data->gpio);
- if (switch_data->irq < 0) {
- ret = switch_data->irq;
- goto err_detect_irq_num_failed;
- }
-
- ret = request_irq(switch_data->irq, gpio_irq_handler,
- IRQF_TRIGGER_LOW, pdev->name, switch_data);
- if (ret < 0)
- goto err_request_irq;
-
- /* Perform initial detection */
- gpio_switch_work(&switch_data->work);
-
- return 0;
-
-err_request_irq:
-err_detect_irq_num_failed:
-err_set_gpio_input:
- gpio_free(switch_data->gpio);
-err_request_gpio:
- switch_dev_unregister(&switch_data->sdev);
-err_switch_dev_register:
- kfree(switch_data);
-
- return ret;
-}
-
-static int gpio_switch_remove(struct platform_device *pdev)
-{
- struct gpio_switch_data *switch_data = platform_get_drvdata(pdev);
-
- cancel_work_sync(&switch_data->work);
- gpio_free(switch_data->gpio);
- switch_dev_unregister(&switch_data->sdev);
- kfree(switch_data);
-
- return 0;
-}
-
-static struct platform_driver gpio_switch_driver = {
- .probe = gpio_switch_probe,
- .remove = gpio_switch_remove,
- .driver = {
- .name = "switch-gpio",
- .owner = THIS_MODULE,
- },
-};
-
-static int __init gpio_switch_init(void)
-{
- return platform_driver_register(&gpio_switch_driver);
-}
-
-static void __exit gpio_switch_exit(void)
-{
- platform_driver_unregister(&gpio_switch_driver);
-}
-
-module_init(gpio_switch_init);
-module_exit(gpio_switch_exit);
-
-MODULE_AUTHOR("Mike Lockwood <lockwood@android.com>");
-MODULE_DESCRIPTION("GPIO Switch driver");
-MODULE_LICENSE("GPL");
diff --git a/include/linux/switch.h b/include/linux/switch.h
deleted file mode 100644
index 3e4c748e343a..000000000000
--- a/include/linux/switch.h
+++ /dev/null
@@ -1,53 +0,0 @@
-/*
- * Switch class driver
- *
- * 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.
- *
-*/
-
-#ifndef __LINUX_SWITCH_H__
-#define __LINUX_SWITCH_H__
-
-struct switch_dev {
- const char *name;
- struct device *dev;
- int index;
- int state;
-
- ssize_t (*print_name)(struct switch_dev *sdev, char *buf);
- ssize_t (*print_state)(struct switch_dev *sdev, char *buf);
-};
-
-struct gpio_switch_platform_data {
- const char *name;
- unsigned gpio;
-
- /* if NULL, switch_dev.name will be printed */
- const char *name_on;
- const char *name_off;
- /* if NULL, "0" or "1" will be printed */
- const char *state_on;
- const char *state_off;
-};
-
-extern int switch_dev_register(struct switch_dev *sdev);
-extern void switch_dev_unregister(struct switch_dev *sdev);
-
-static inline int switch_get_state(struct switch_dev *sdev)
-{
- return sdev->state;
-}
-
-extern void switch_set_state(struct switch_dev *sdev, int state);
-
-#endif /* __LINUX_SWITCH_H__ */