From 3c8a23c29d30eec7a20fbb3e47e5346d9ada687b Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Mon, 1 Jan 2018 22:49:29 -0800 Subject: Input: gpio_tilt - delete driver This driver was merged in 2011 as a tool for detecting the orientation of a screen. The device driver assumes board file setup using the platform data from . But no boards in the kernel tree defines this platform data. As I am faced with refactoring drivers to use GPIO descriptors and pass decriptor tables from boards, or use the device tree device drivers like these creates a serious problem: I cannot fix them and cannot test them, not even compile-test them with a system actually using it (no in-tree boardfile). I suggest to delete this driver and rewrite it using device tree if it is still in use on actively maintained systems. I can also offer to rewrite it out of the blue using device tree if someone promise to test it and help me iterate it. Signed-off-by: Linus Walleij Acked-by: Heiko Stuebner Patchwork-Id: 10133609 Signed-off-by: Dmitry Torokhov --- drivers/input/misc/gpio_tilt_polled.c | 210 ---------------------------------- 1 file changed, 210 deletions(-) delete mode 100644 drivers/input/misc/gpio_tilt_polled.c (limited to 'drivers/input/misc/gpio_tilt_polled.c') diff --git a/drivers/input/misc/gpio_tilt_polled.c b/drivers/input/misc/gpio_tilt_polled.c deleted file mode 100644 index 6e217a45e39a..000000000000 --- a/drivers/input/misc/gpio_tilt_polled.c +++ /dev/null @@ -1,210 +0,0 @@ -/* - * Driver for tilt switches connected via GPIO lines - * not capable of generating interrupts - * - * Copyright (C) 2011 Heiko Stuebner - * - * based on: drivers/input/keyboard/gpio_keys_polled.c - * - * Copyright (C) 2007-2010 Gabor Juhos - * Copyright (C) 2010 Nuno Goncalves - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#define DRV_NAME "gpio-tilt-polled" - -struct gpio_tilt_polled_dev { - struct input_polled_dev *poll_dev; - struct device *dev; - const struct gpio_tilt_platform_data *pdata; - - int last_state; - - int threshold; - int count; -}; - -static void gpio_tilt_polled_poll(struct input_polled_dev *dev) -{ - struct gpio_tilt_polled_dev *tdev = dev->private; - const struct gpio_tilt_platform_data *pdata = tdev->pdata; - struct input_dev *input = dev->input; - struct gpio_tilt_state *tilt_state = NULL; - int state, i; - - if (tdev->count < tdev->threshold) { - tdev->count++; - } else { - state = 0; - for (i = 0; i < pdata->nr_gpios; i++) - state |= (!!gpio_get_value(pdata->gpios[i].gpio) << i); - - if (state != tdev->last_state) { - for (i = 0; i < pdata->nr_states; i++) - if (pdata->states[i].gpios == state) - tilt_state = &pdata->states[i]; - - if (tilt_state) { - for (i = 0; i < pdata->nr_axes; i++) - input_report_abs(input, - pdata->axes[i].axis, - tilt_state->axes[i]); - - input_sync(input); - } - - tdev->count = 0; - tdev->last_state = state; - } - } -} - -static void gpio_tilt_polled_open(struct input_polled_dev *dev) -{ - struct gpio_tilt_polled_dev *tdev = dev->private; - const struct gpio_tilt_platform_data *pdata = tdev->pdata; - - if (pdata->enable) - pdata->enable(tdev->dev); - - /* report initial state of the axes */ - tdev->last_state = -1; - tdev->count = tdev->threshold; - gpio_tilt_polled_poll(tdev->poll_dev); -} - -static void gpio_tilt_polled_close(struct input_polled_dev *dev) -{ - struct gpio_tilt_polled_dev *tdev = dev->private; - const struct gpio_tilt_platform_data *pdata = tdev->pdata; - - if (pdata->disable) - pdata->disable(tdev->dev); -} - -static int gpio_tilt_polled_probe(struct platform_device *pdev) -{ - const struct gpio_tilt_platform_data *pdata = - dev_get_platdata(&pdev->dev); - struct device *dev = &pdev->dev; - struct gpio_tilt_polled_dev *tdev; - struct input_polled_dev *poll_dev; - struct input_dev *input; - int error, i; - - if (!pdata || !pdata->poll_interval) - return -EINVAL; - - tdev = kzalloc(sizeof(struct gpio_tilt_polled_dev), GFP_KERNEL); - if (!tdev) { - dev_err(dev, "no memory for private data\n"); - return -ENOMEM; - } - - error = gpio_request_array(pdata->gpios, pdata->nr_gpios); - if (error) { - dev_err(dev, - "Could not request tilt GPIOs: %d\n", error); - goto err_free_tdev; - } - - poll_dev = input_allocate_polled_device(); - if (!poll_dev) { - dev_err(dev, "no memory for polled device\n"); - error = -ENOMEM; - goto err_free_gpios; - } - - poll_dev->private = tdev; - poll_dev->poll = gpio_tilt_polled_poll; - poll_dev->poll_interval = pdata->poll_interval; - poll_dev->open = gpio_tilt_polled_open; - poll_dev->close = gpio_tilt_polled_close; - - input = poll_dev->input; - - input->name = pdev->name; - input->phys = DRV_NAME"/input0"; - input->dev.parent = dev; - - input->id.bustype = BUS_HOST; - input->id.vendor = 0x0001; - input->id.product = 0x0001; - input->id.version = 0x0100; - - __set_bit(EV_ABS, input->evbit); - for (i = 0; i < pdata->nr_axes; i++) - input_set_abs_params(input, pdata->axes[i].axis, - pdata->axes[i].min, pdata->axes[i].max, - pdata->axes[i].fuzz, pdata->axes[i].flat); - - tdev->threshold = DIV_ROUND_UP(pdata->debounce_interval, - pdata->poll_interval); - - tdev->poll_dev = poll_dev; - tdev->dev = dev; - tdev->pdata = pdata; - - error = input_register_polled_device(poll_dev); - if (error) { - dev_err(dev, "unable to register polled device, err=%d\n", - error); - goto err_free_polldev; - } - - platform_set_drvdata(pdev, tdev); - - return 0; - -err_free_polldev: - input_free_polled_device(poll_dev); -err_free_gpios: - gpio_free_array(pdata->gpios, pdata->nr_gpios); -err_free_tdev: - kfree(tdev); - - return error; -} - -static int gpio_tilt_polled_remove(struct platform_device *pdev) -{ - struct gpio_tilt_polled_dev *tdev = platform_get_drvdata(pdev); - const struct gpio_tilt_platform_data *pdata = tdev->pdata; - - input_unregister_polled_device(tdev->poll_dev); - input_free_polled_device(tdev->poll_dev); - - gpio_free_array(pdata->gpios, pdata->nr_gpios); - - kfree(tdev); - - return 0; -} - -static struct platform_driver gpio_tilt_polled_driver = { - .probe = gpio_tilt_polled_probe, - .remove = gpio_tilt_polled_remove, - .driver = { - .name = DRV_NAME, - }, -}; - -module_platform_driver(gpio_tilt_polled_driver); - -MODULE_LICENSE("GPL v2"); -MODULE_AUTHOR("Heiko Stuebner "); -MODULE_DESCRIPTION("Polled GPIO tilt driver"); -MODULE_ALIAS("platform:" DRV_NAME); -- cgit v1.2.3-59-g8ed1b