From 278b13ce3a89698711c5a67792ba2dba41555433 Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Wed, 2 Oct 2019 10:33:02 -0700 Subject: Input: remove input_polled_dev implementation Now that normal input devices support polling mode, and all users of input_polled_dev API have been converted, we can remove it. Signed-off-by: Dmitry Torokhov --- drivers/input/input-polldev.c | 362 ------------------------------------------ 1 file changed, 362 deletions(-) delete mode 100644 drivers/input/input-polldev.c (limited to 'drivers/input/input-polldev.c') diff --git a/drivers/input/input-polldev.c b/drivers/input/input-polldev.c deleted file mode 100644 index 9bf1c9aeb4c4..000000000000 --- a/drivers/input/input-polldev.c +++ /dev/null @@ -1,362 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Generic implementation of a polled input device - - * Copyright (c) 2007 Dmitry Torokhov - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include -#include -#include -#include -#include -#include - -MODULE_AUTHOR("Dmitry Torokhov "); -MODULE_DESCRIPTION("Generic implementation of a polled input device"); -MODULE_LICENSE("GPL v2"); - -static void input_polldev_queue_work(struct input_polled_dev *dev) -{ - unsigned long delay; - - delay = msecs_to_jiffies(dev->poll_interval); - if (delay >= HZ) - delay = round_jiffies_relative(delay); - - queue_delayed_work(system_freezable_wq, &dev->work, delay); -} - -static void input_polled_device_work(struct work_struct *work) -{ - struct input_polled_dev *dev = - container_of(work, struct input_polled_dev, work.work); - - dev->poll(dev); - input_polldev_queue_work(dev); -} - -static int input_open_polled_device(struct input_dev *input) -{ - struct input_polled_dev *dev = input_get_drvdata(input); - - if (dev->open) - dev->open(dev); - - /* Only start polling if polling is enabled */ - if (dev->poll_interval > 0) { - dev->poll(dev); - input_polldev_queue_work(dev); - } - - return 0; -} - -static void input_close_polled_device(struct input_dev *input) -{ - struct input_polled_dev *dev = input_get_drvdata(input); - - cancel_delayed_work_sync(&dev->work); - - if (dev->close) - dev->close(dev); -} - -/* SYSFS interface */ - -static ssize_t input_polldev_get_poll(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct input_polled_dev *polldev = dev_get_drvdata(dev); - - return sprintf(buf, "%d\n", polldev->poll_interval); -} - -static ssize_t input_polldev_set_poll(struct device *dev, - struct device_attribute *attr, const char *buf, - size_t count) -{ - struct input_polled_dev *polldev = dev_get_drvdata(dev); - struct input_dev *input = polldev->input; - unsigned int interval; - int err; - - err = kstrtouint(buf, 0, &interval); - if (err) - return err; - - if (interval < polldev->poll_interval_min) - return -EINVAL; - - if (interval > polldev->poll_interval_max) - return -EINVAL; - - mutex_lock(&input->mutex); - - polldev->poll_interval = interval; - - if (input->users) { - cancel_delayed_work_sync(&polldev->work); - if (polldev->poll_interval > 0) - input_polldev_queue_work(polldev); - } - - mutex_unlock(&input->mutex); - - return count; -} - -static DEVICE_ATTR(poll, S_IRUGO | S_IWUSR, input_polldev_get_poll, - input_polldev_set_poll); - - -static ssize_t input_polldev_get_max(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct input_polled_dev *polldev = dev_get_drvdata(dev); - - return sprintf(buf, "%d\n", polldev->poll_interval_max); -} - -static DEVICE_ATTR(max, S_IRUGO, input_polldev_get_max, NULL); - -static ssize_t input_polldev_get_min(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct input_polled_dev *polldev = dev_get_drvdata(dev); - - return sprintf(buf, "%d\n", polldev->poll_interval_min); -} - -static DEVICE_ATTR(min, S_IRUGO, input_polldev_get_min, NULL); - -static struct attribute *sysfs_attrs[] = { - &dev_attr_poll.attr, - &dev_attr_max.attr, - &dev_attr_min.attr, - NULL -}; - -static struct attribute_group input_polldev_attribute_group = { - .attrs = sysfs_attrs -}; - -static const struct attribute_group *input_polldev_attribute_groups[] = { - &input_polldev_attribute_group, - NULL -}; - -/** - * input_allocate_polled_device - allocate memory for polled device - * - * The function allocates memory for a polled device and also - * for an input device associated with this polled device. - */ -struct input_polled_dev *input_allocate_polled_device(void) -{ - struct input_polled_dev *dev; - - dev = kzalloc(sizeof(struct input_polled_dev), GFP_KERNEL); - if (!dev) - return NULL; - - dev->input = input_allocate_device(); - if (!dev->input) { - kfree(dev); - return NULL; - } - - return dev; -} -EXPORT_SYMBOL(input_allocate_polled_device); - -struct input_polled_devres { - struct input_polled_dev *polldev; -}; - -static int devm_input_polldev_match(struct device *dev, void *res, void *data) -{ - struct input_polled_devres *devres = res; - - return devres->polldev == data; -} - -static void devm_input_polldev_release(struct device *dev, void *res) -{ - struct input_polled_devres *devres = res; - struct input_polled_dev *polldev = devres->polldev; - - dev_dbg(dev, "%s: dropping reference/freeing %s\n", - __func__, dev_name(&polldev->input->dev)); - - input_put_device(polldev->input); - kfree(polldev); -} - -static void devm_input_polldev_unregister(struct device *dev, void *res) -{ - struct input_polled_devres *devres = res; - struct input_polled_dev *polldev = devres->polldev; - - dev_dbg(dev, "%s: unregistering device %s\n", - __func__, dev_name(&polldev->input->dev)); - input_unregister_device(polldev->input); - - /* - * Note that we are still holding extra reference to the input - * device so it will stick around until devm_input_polldev_release() - * is called. - */ -} - -/** - * devm_input_allocate_polled_device - allocate managed polled device - * @dev: device owning the polled device being created - * - * Returns prepared &struct input_polled_dev or %NULL. - * - * Managed polled input devices do not need to be explicitly unregistered - * or freed as it will be done automatically when owner device unbinds - * from * its driver (or binding fails). Once such managed polled device - * is allocated, it is ready to be set up and registered in the same - * fashion as regular polled input devices (using - * input_register_polled_device() function). - * - * If you want to manually unregister and free such managed polled devices, - * it can be still done by calling input_unregister_polled_device() and - * input_free_polled_device(), although it is rarely needed. - * - * NOTE: the owner device is set up as parent of input device and users - * should not override it. - */ -struct input_polled_dev *devm_input_allocate_polled_device(struct device *dev) -{ - struct input_polled_dev *polldev; - struct input_polled_devres *devres; - - devres = devres_alloc(devm_input_polldev_release, sizeof(*devres), - GFP_KERNEL); - if (!devres) - return NULL; - - polldev = input_allocate_polled_device(); - if (!polldev) { - devres_free(devres); - return NULL; - } - - polldev->input->dev.parent = dev; - polldev->devres_managed = true; - - devres->polldev = polldev; - devres_add(dev, devres); - - return polldev; -} -EXPORT_SYMBOL(devm_input_allocate_polled_device); - -/** - * input_free_polled_device - free memory allocated for polled device - * @dev: device to free - * - * The function frees memory allocated for polling device and drops - * reference to the associated input device. - */ -void input_free_polled_device(struct input_polled_dev *dev) -{ - if (dev) { - if (dev->devres_managed) - WARN_ON(devres_destroy(dev->input->dev.parent, - devm_input_polldev_release, - devm_input_polldev_match, - dev)); - input_put_device(dev->input); - kfree(dev); - } -} -EXPORT_SYMBOL(input_free_polled_device); - -/** - * input_register_polled_device - register polled device - * @dev: device to register - * - * The function registers previously initialized polled input device - * with input layer. The device should be allocated with call to - * input_allocate_polled_device(). Callers should also set up poll() - * method and set up capabilities (id, name, phys, bits) of the - * corresponding input_dev structure. - */ -int input_register_polled_device(struct input_polled_dev *dev) -{ - struct input_polled_devres *devres = NULL; - struct input_dev *input = dev->input; - int error; - - if (dev->devres_managed) { - devres = devres_alloc(devm_input_polldev_unregister, - sizeof(*devres), GFP_KERNEL); - if (!devres) - return -ENOMEM; - - devres->polldev = dev; - } - - input_set_drvdata(input, dev); - INIT_DELAYED_WORK(&dev->work, input_polled_device_work); - - if (!dev->poll_interval) - dev->poll_interval = 500; - if (!dev->poll_interval_max) - dev->poll_interval_max = dev->poll_interval; - - input->open = input_open_polled_device; - input->close = input_close_polled_device; - - input->dev.groups = input_polldev_attribute_groups; - - error = input_register_device(input); - if (error) { - devres_free(devres); - return error; - } - - /* - * Take extra reference to the underlying input device so - * that it survives call to input_unregister_polled_device() - * and is deleted only after input_free_polled_device() - * has been invoked. This is needed to ease task of freeing - * sparse keymaps. - */ - input_get_device(input); - - if (dev->devres_managed) { - dev_dbg(input->dev.parent, "%s: registering %s with devres.\n", - __func__, dev_name(&input->dev)); - devres_add(input->dev.parent, devres); - } - - return 0; -} -EXPORT_SYMBOL(input_register_polled_device); - -/** - * input_unregister_polled_device - unregister polled device - * @dev: device to unregister - * - * The function unregisters previously registered polled input - * device from input layer. Polling is stopped and device is - * ready to be freed with call to input_free_polled_device(). - */ -void input_unregister_polled_device(struct input_polled_dev *dev) -{ - if (dev->devres_managed) - WARN_ON(devres_destroy(dev->input->dev.parent, - devm_input_polldev_unregister, - devm_input_polldev_match, - dev)); - - input_unregister_device(dev->input); -} -EXPORT_SYMBOL(input_unregister_polled_device); -- cgit v1.2.3-59-g8ed1b