add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/input/touchscreen/of_touchscreen.c
..
..
@@ -1,12 +1,8 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
1
2
 /*
2
3
  *  Generic DT helper functions for touchscreen devices
3
4
  *
4
5
  *  Copyright (c) 2014 Sebastian Reichel <sre@kernel.org>
5
- *
6
- *  This program is free software; you can redistribute it and/or modify
7
- *  it under the terms of the GNU General Public License version 2 as
8
- *  published by the Free Software Foundation.
9
- *
10
6
  */
11
7
 
12
8
 #include <linux/property.h>
..
..
@@ -35,7 +31,7 @@
35
31
 
36
32
 static void touchscreen_set_params(struct input_dev *dev,
37
33
 				   unsigned long axis,
38
-				   int max, int fuzz)
34
+				   int min, int max, int fuzz)
39
35
 {
40
36
 	struct input_absinfo *absinfo;
41
37
 
..
..
@@ -47,6 +43,7 @@
47
43
 	}
48
44
 
49
45
 	absinfo = &dev->absinfo[axis];
46
+	absinfo->minimum = min;
50
47
 	absinfo->maximum = max;
51
48
 	absinfo->fuzz = fuzz;
52
49
 }
..
..
@@ -68,35 +65,43 @@
68
65
 				  struct touchscreen_properties *prop)
69
66
 {
70
67
 	struct device *dev = input->dev.parent;
71
-	unsigned int axis;
72
-	unsigned int maximum, fuzz;
68
+	struct input_absinfo *absinfo;
69
+	unsigned int axis, axis_x, axis_y;
70
+	unsigned int minimum, maximum, fuzz;
73
71
 	bool data_present;
74
72
 
75
73
 	input_alloc_absinfo(input);
76
74
 	if (!input->absinfo)
77
75
 		return;
78
76
 
79
-	axis = multitouch ? ABS_MT_POSITION_X : ABS_X;
80
-	data_present = touchscreen_get_prop_u32(dev, "touchscreen-size-x",
81
-						input_abs_get_max(input,
82
-								  axis) + 1,
83
-						&maximum);
84
-	data_present |= touchscreen_get_prop_u32(dev, "touchscreen-fuzz-x",
85
-						input_abs_get_fuzz(input, axis),
86
-						&fuzz);
87
-	if (data_present)
88
-		touchscreen_set_params(input, axis, maximum - 1, fuzz);
77
+	axis_x = multitouch ? ABS_MT_POSITION_X : ABS_X;
78
+	axis_y = multitouch ? ABS_MT_POSITION_Y : ABS_Y;
89
79
 
90
-	axis = multitouch ? ABS_MT_POSITION_Y : ABS_Y;
91
-	data_present = touchscreen_get_prop_u32(dev, "touchscreen-size-y",
92
-						input_abs_get_max(input,
93
-								  axis) + 1,
94
-						&maximum);
95
-	data_present |= touchscreen_get_prop_u32(dev, "touchscreen-fuzz-y",
96
-						input_abs_get_fuzz(input, axis),
97
-						&fuzz);
80
+	data_present = touchscreen_get_prop_u32(dev, "touchscreen-min-x",
81
+						input_abs_get_min(input, axis_x),
82
+						&minimum);
83
+	data_present |= touchscreen_get_prop_u32(dev, "touchscreen-size-x",
84
+						 input_abs_get_max(input,
85
+								   axis_x) + 1,
86
+						 &maximum);
87
+	data_present |= touchscreen_get_prop_u32(dev, "touchscreen-fuzz-x",
88
+						 input_abs_get_fuzz(input, axis_x),
89
+						 &fuzz);
98
90
 	if (data_present)
99
-		touchscreen_set_params(input, axis, maximum - 1, fuzz);
91
+		touchscreen_set_params(input, axis_x, minimum, maximum - 1, fuzz);
92
+
93
+	data_present = touchscreen_get_prop_u32(dev, "touchscreen-min-y",
94
+						input_abs_get_min(input, axis_y),
95
+						&minimum);
96
+	data_present |= touchscreen_get_prop_u32(dev, "touchscreen-size-y",
97
+						 input_abs_get_max(input,
98
+								   axis_y) + 1,
99
+						 &maximum);
100
+	data_present |= touchscreen_get_prop_u32(dev, "touchscreen-fuzz-y",
101
+						 input_abs_get_fuzz(input, axis_y),
102
+						 &fuzz);
103
+	if (data_present)
104
+		touchscreen_set_params(input, axis_y, minimum, maximum - 1, fuzz);
100
105
 
101
106
 	axis = multitouch ? ABS_MT_PRESSURE : ABS_PRESSURE;
102
107
 	data_present = touchscreen_get_prop_u32(dev,
..
..
@@ -108,24 +113,34 @@
108
113
 						 input_abs_get_fuzz(input, axis),
109
114
 						 &fuzz);
110
115
 	if (data_present)
111
-		touchscreen_set_params(input, axis, maximum, fuzz);
116
+		touchscreen_set_params(input, axis, 0, maximum, fuzz);
112
117
 
113
118
 	if (!prop)
114
119
 		return;
115
120
 
116
-	axis = multitouch ? ABS_MT_POSITION_X : ABS_X;
121
+	prop->max_x = input_abs_get_max(input, axis_x);
122
+	prop->max_y = input_abs_get_max(input, axis_y);
117
123
 
118
-	prop->max_x = input_abs_get_max(input, axis);
119
-	prop->max_y = input_abs_get_max(input, axis + 1);
120
124
 	prop->invert_x =
121
125
 		device_property_read_bool(dev, "touchscreen-inverted-x");
126
+	if (prop->invert_x) {
127
+		absinfo = &input->absinfo[axis_x];
128
+		absinfo->maximum -= absinfo->minimum;
129
+		absinfo->minimum = 0;
130
+	}
131
+
122
132
 	prop->invert_y =
123
133
 		device_property_read_bool(dev, "touchscreen-inverted-y");
134
+	if (prop->invert_y) {
135
+		absinfo = &input->absinfo[axis_y];
136
+		absinfo->maximum -= absinfo->minimum;
137
+		absinfo->minimum = 0;
138
+	}
139
+
124
140
 	prop->swap_x_y =
125
141
 		device_property_read_bool(dev, "touchscreen-swapped-x-y");
126
-
127
142
 	if (prop->swap_x_y)
128
-		swap(input->absinfo[axis], input->absinfo[axis + 1]);
143
+		swap(input->absinfo[axis_x], input->absinfo[axis_y]);
129
144
 }
130
145
 EXPORT_SYMBOL(touchscreen_parse_properties);
131
146