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path: root/drivers/input/misc/gpio_tilt_polled.c
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Diffstat (limited to 'drivers/input/misc/gpio_tilt_polled.c')
-rw-r--r--drivers/input/misc/gpio_tilt_polled.c210
1 files changed, 0 insertions, 210 deletions
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 <heiko@sntech.de>
- *
- * based on: drivers/input/keyboard/gpio_keys_polled.c
- *
- * Copyright (C) 2007-2010 Gabor Juhos <juhosg@openwrt.org>
- * Copyright (C) 2010 Nuno Goncalves <nunojpg@gmail.com>
- *
- * 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 <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/input.h>
-#include <linux/input-polldev.h>
-#include <linux/ioport.h>
-#include <linux/platform_device.h>
-#include <linux/gpio.h>
-#include <linux/input/gpio_tilt.h>
-
-#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 <heiko@sntech.de>");
-MODULE_DESCRIPTION("Polled GPIO tilt driver");
-MODULE_ALIAS("platform:" DRV_NAME);