Release 4.7 drivers/input/touchscreen/of_touchscreen.c
/*
* Generic DT helper functions for touchscreen devices
*
* Copyright (c) 2014 Sebastian Reichel <sre@kernel.org>
*
* 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/property.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/input/touchscreen.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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dmitry torokhov | dmitry torokhov | 39 | 60.00% | 2 | 66.67% |
| maxime ripard | maxime ripard | 26 | 40.00% | 1 | 33.33% |
| Total | 65 | 100.00% | 3 | 100.00% |
static void touchscreen_set_params(struct input_dev *dev,
unsigned long axis,
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->maximum = max;
absinfo->fuzz = fuzz;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| maxime ripard | maxime ripard | 72 | 96.00% | 1 | 50.00% |
| dmitry torokhov | dmitry torokhov | 3 | 4.00% | 1 | 50.00% |
| Total | 75 | 100.00% | 2 | 100.00% |
/**
* 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
*
* 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 device *dev = input->dev.parent;
unsigned int axis;
unsigned int maximum, fuzz;
bool data_present;
input_alloc_absinfo(input);
if (!input->absinfo)
return;
axis = multitouch ? ABS_MT_POSITION_X : ABS_X;
data_present = touchscreen_get_prop_u32(dev, "touchscreen-size-x",
input_abs_get_max(input,
axis) + 1,
&maximum) |
touchscreen_get_prop_u32(dev, "touchscreen-fuzz-x",
input_abs_get_fuzz(input, axis),
&fuzz);
if (data_present)
touchscreen_set_params(input, axis, maximum - 1, fuzz);
axis = multitouch ? ABS_MT_POSITION_Y : ABS_Y;
data_present = touchscreen_get_prop_u32(dev, "touchscreen-size-y",
input_abs_get_max(input,
axis) + 1,
&maximum) |
touchscreen_get_prop_u32(dev, "touchscreen-fuzz-y",
input_abs_get_fuzz(input, axis),
&fuzz);
if (data_present)
touchscreen_set_params(input, axis, 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, maximum, fuzz);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dmitry torokhov | dmitry torokhov | 135 | 57.45% | 3 | 50.00% |
| sebastian reichel | sebastian reichel | 63 | 26.81% | 1 | 16.67% |
| maxime ripard | maxime ripard | 37 | 15.74% | 2 | 33.33% |
| Total | 235 | 100.00% | 6 | 100.00% |
EXPORT_SYMBOL(touchscreen_parse_properties);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dmitry torokhov | dmitry torokhov | 180 | 45.69% | 4 | 57.14% |
| maxime ripard | maxime ripard | 138 | 35.03% | 2 | 28.57% |
| sebastian reichel | sebastian reichel | 76 | 19.29% | 1 | 14.29% |
| Total | 394 | 100.00% | 7 | 100.00% |
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.