diff options
Diffstat (limited to 'drivers/input/touchscreen/of_touchscreen.c')
| -rw-r--r-- | drivers/input/touchscreen/of_touchscreen.c | 206 |
1 files changed, 0 insertions, 206 deletions
diff --git a/drivers/input/touchscreen/of_touchscreen.c b/drivers/input/touchscreen/of_touchscreen.c deleted file mode 100644 index 97342e14b4f1..000000000000 --- a/drivers/input/touchscreen/of_touchscreen.c +++ /dev/null @@ -1,206 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Generic DT helper functions for touchscreen devices - * - * Copyright (c) 2014 Sebastian Reichel <sre@kernel.org> - */ - -#include <linux/property.h> -#include <linux/input.h> -#include <linux/input/mt.h> -#include <linux/input/touchscreen.h> -#include <linux/module.h> - -static bool touchscreen_get_prop_u32(struct device *dev, - const char *property, - unsigned int default_value, - unsigned int *value) -{ - u32 val; - int error; - - error = device_property_read_u32(dev, property, &val); - if (error) { - *value = default_value; - return false; - } - - *value = val; - return true; -} - -static void touchscreen_set_params(struct input_dev *dev, - unsigned long axis, - int min, int max, int fuzz) -{ - struct input_absinfo *absinfo; - - if (!test_bit(axis, dev->absbit)) { - dev_warn(&dev->dev, - "DT specifies parameters but the axis %lu is not set up\n", - axis); - return; - } - - absinfo = &dev->absinfo[axis]; - absinfo->minimum = min; - absinfo->maximum = max; - absinfo->fuzz = fuzz; -} - -/** - * touchscreen_parse_properties - parse common touchscreen DT properties - * @input: input device that should be parsed - * @multitouch: specifies whether parsed properties should be applied to - * single-touch or multi-touch axes - * @prop: pointer to a struct touchscreen_properties into which to store - * axis swap and invert info for use with touchscreen_report_x_y(); - * or %NULL - * - * This function parses common DT properties for touchscreens and setups the - * input device accordingly. The function keeps previously set up default - * values if no value is specified via DT. - */ -void touchscreen_parse_properties(struct input_dev *input, bool multitouch, - struct touchscreen_properties *prop) -{ - struct device *dev = input->dev.parent; - struct input_absinfo *absinfo; - unsigned int axis, axis_x, axis_y; - unsigned int minimum, maximum, fuzz; - bool data_present; - - input_alloc_absinfo(input); - if (!input->absinfo) - return; - - axis_x = multitouch ? ABS_MT_POSITION_X : ABS_X; - axis_y = multitouch ? ABS_MT_POSITION_Y : ABS_Y; - - data_present = touchscreen_get_prop_u32(dev, "touchscreen-min-x", - input_abs_get_min(input, axis_x), - &minimum) | - touchscreen_get_prop_u32(dev, "touchscreen-size-x", - input_abs_get_max(input, - axis_x) + 1, - &maximum) | - touchscreen_get_prop_u32(dev, "touchscreen-fuzz-x", - input_abs_get_fuzz(input, axis_x), - &fuzz); - if (data_present) - touchscreen_set_params(input, axis_x, minimum, maximum - 1, fuzz); - - data_present = touchscreen_get_prop_u32(dev, "touchscreen-min-y", - input_abs_get_min(input, axis_y), - &minimum) | - touchscreen_get_prop_u32(dev, "touchscreen-size-y", - input_abs_get_max(input, - axis_y) + 1, - &maximum) | - touchscreen_get_prop_u32(dev, "touchscreen-fuzz-y", - input_abs_get_fuzz(input, axis_y), - &fuzz); - if (data_present) - touchscreen_set_params(input, axis_y, minimum, maximum - 1, fuzz); - - axis = multitouch ? ABS_MT_PRESSURE : ABS_PRESSURE; - data_present = touchscreen_get_prop_u32(dev, - "touchscreen-max-pressure", - input_abs_get_max(input, axis), - &maximum) | - touchscreen_get_prop_u32(dev, - "touchscreen-fuzz-pressure", - input_abs_get_fuzz(input, axis), - &fuzz); - if (data_present) - touchscreen_set_params(input, axis, 0, maximum, fuzz); - - if (!prop) - return; - - prop->max_x = input_abs_get_max(input, axis_x); - prop->max_y = input_abs_get_max(input, axis_y); - - prop->invert_x = - device_property_read_bool(dev, "touchscreen-inverted-x"); - if (prop->invert_x) { - absinfo = &input->absinfo[axis_x]; - absinfo->maximum -= absinfo->minimum; - absinfo->minimum = 0; - } - - prop->invert_y = - device_property_read_bool(dev, "touchscreen-inverted-y"); - if (prop->invert_y) { - absinfo = &input->absinfo[axis_y]; - absinfo->maximum -= absinfo->minimum; - absinfo->minimum = 0; - } - - prop->swap_x_y = - device_property_read_bool(dev, "touchscreen-swapped-x-y"); - if (prop->swap_x_y) - swap(input->absinfo[axis_x], input->absinfo[axis_y]); -} -EXPORT_SYMBOL(touchscreen_parse_properties); - -static void -touchscreen_apply_prop_to_x_y(const struct touchscreen_properties *prop, - unsigned int *x, unsigned int *y) -{ - if (prop->invert_x) - *x = prop->max_x - *x; - - if (prop->invert_y) - *y = prop->max_y - *y; - - if (prop->swap_x_y) - swap(*x, *y); -} - -/** - * touchscreen_set_mt_pos - Set input_mt_pos coordinates - * @pos: input_mt_pos to set coordinates of - * @prop: pointer to a struct touchscreen_properties - * @x: X coordinate to store in pos - * @y: Y coordinate to store in pos - * - * Adjust the passed in x and y values applying any axis inversion and - * swapping requested in the passed in touchscreen_properties and store - * the result in a struct input_mt_pos. - */ -void touchscreen_set_mt_pos(struct input_mt_pos *pos, - const struct touchscreen_properties *prop, - unsigned int x, unsigned int y) -{ - touchscreen_apply_prop_to_x_y(prop, &x, &y); - pos->x = x; - pos->y = y; -} -EXPORT_SYMBOL(touchscreen_set_mt_pos); - -/** - * touchscreen_report_pos - Report touchscreen coordinates - * @input: input_device to report coordinates for - * @prop: pointer to a struct touchscreen_properties - * @x: X coordinate to report - * @y: Y coordinate to report - * @multitouch: Report coordinates on single-touch or multi-touch axes - * - * Adjust the passed in x and y values applying any axis inversion and - * swapping requested in the passed in touchscreen_properties and then - * report the resulting coordinates on the input_dev's x and y axis. - */ -void touchscreen_report_pos(struct input_dev *input, - const struct touchscreen_properties *prop, - unsigned int x, unsigned int y, - bool multitouch) -{ - touchscreen_apply_prop_to_x_y(prop, &x, &y); - input_report_abs(input, multitouch ? ABS_MT_POSITION_X : ABS_X, x); - input_report_abs(input, multitouch ? ABS_MT_POSITION_Y : ABS_Y, y); -} -EXPORT_SYMBOL(touchscreen_report_pos); - -MODULE_LICENSE("GPL v2"); -MODULE_DESCRIPTION("Device-tree helpers functions for touchscreen devices"); |