obj-$(CONFIG_INPUT) += input-core.o
input-core-y := input.o input-compat.o input-mt.o input-poller.o ff-core.o
+input-core-y += touchscreen.o
obj-$(CONFIG_INPUT_FF_MEMLESS) += ff-memless.o
obj-$(CONFIG_INPUT_SPARSEKMAP) += sparse-keymap.o
--- /dev/null
+// 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");
if INPUT_TOUCHSCREEN
-config TOUCHSCREEN_PROPERTIES
- def_tristate INPUT
- depends on INPUT
-
config TOUCHSCREEN_88PM860X
tristate "Marvell 88PM860x touchscreen"
depends on MFD_88PM860X
wm97xx-ts-y := wm97xx-core.o
-obj-$(CONFIG_TOUCHSCREEN_PROPERTIES) += of_touchscreen.o
obj-$(CONFIG_TOUCHSCREEN_88PM860X) += 88pm860x-ts.o
obj-$(CONFIG_TOUCHSCREEN_AD7877) += ad7877.o
obj-$(CONFIG_TOUCHSCREEN_AD7879) += ad7879.o
+++ /dev/null
-// 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");
projects / linux.git / commitdiff