Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

Pull more input updates from Dmitry Torokhov: "An update to the tsc2005 driver that allows it to also support tsc2004 (basically the same controller, but uses i2c instead of spi bus), and a couple of bug fixes" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: parkbd - drop bogus __init from parkbd_allocate_serio() Input: elantech - add Fujitsu Lifebook U745 to force crc_enabled Input: tsc2004 - add support for tsc2004 Input: tsc200x-core - rename functions and variables Input: tsc2005 - separate SPI and core functions

Linus Torvalds committed 11 years ago

Commit a30b7ca2 parents d83763f bbdb5c29 files · +899 −703Browse files

Unified · Split

9 files

Documentation/devicetree/bindings/input/touchscreen/tsc2005.txt +28 −6
drivers/input/mouse/elantech.c +7 −0
drivers/input/serio/parkbd.c +1 −1
drivers/input/touchscreen/Kconfig +17 −0
drivers/input/touchscreen/Makefile +2 −0
drivers/input/touchscreen/tsc2004.c +83 −0
drivers/input/touchscreen/tsc2005.c +18 −696
drivers/input/touchscreen/tsc200x-core.c +665 −0
drivers/input/touchscreen/tsc200x-core.h +78 −0

Documentation/devicetree/bindings/input/touchscreen/tsc2005.txt+28−6

@@ -1,14 +1,15 @@
1		−* Texas Instruments tsc2005 touchscreen controller
	1	+* Texas Instruments tsc2004 and tsc2005 touchscreen controllers
2	2
3	3	Required properties:
4		− - compatible : "ti,tsc2005"
5		− - reg : SPI device address
6		− - spi-max-frequency : Maximal SPI speed
	4	+ - compatible : "ti,tsc2004" or "ti,tsc2005"
	5	+ - reg : Device address
7	6	- interrupts : IRQ specifier
8		− - reset-gpios : GPIO specifier
9		− - vio-supply : Regulator specifier
	7	+ - spi-max-frequency : Maximum SPI clocking speed of the device
	8	+ (for tsc2005)
10	9
11	10	Optional properties:
	11	+ - vio-supply : Regulator specifier
	12	+ - reset-gpios : GPIO specifier for the controller reset line
12	13	- ti,x-plate-ohms : integer, resistance of the touchscreen's X plates
13	14	in ohm (defaults to 280)
14	15	- ti,esd-recovery-timeout-ms : integer, if the touchscreen does not respond after
@@ -18,6 +19,27 @@ Optional properties: · 3 unmodified lines
18	19
19	20	Example:
20	21
	22	+&i2c3 {
	23	+ tsc2004@48 {
	24	+ compatible = "ti,tsc2004";
	25	+ reg = <0x48>;
	26	+ vio-supply = <&vio>;
	27	+
	28	+ reset-gpios = <&gpio4 8 GPIO_ACTIVE_HIGH>;
	29	+ interrupts-extended = <&gpio1 27 IRQ_TYPE_EDGE_RISING>;
	30	+
	31	+ touchscreen-fuzz-x = <4>;
	32	+ touchscreen-fuzz-y = <7>;
	33	+ touchscreen-fuzz-pressure = <2>;
	34	+ touchscreen-size-x = <4096>;
	35	+ touchscreen-size-y = <4096>;
	36	+ touchscreen-max-pressure = <2048>;
	37	+
	38	+ ti,x-plate-ohms = <280>;
	39	+ ti,esd-recovery-timeout-ms = <8000>;
	40	+ };
	41	+}
	42	+
21	43	&mcspi1 {
22	44	tsc2005@0 {
23	45	compatible = "ti,tsc2005";

drivers/input/mouse/elantech.c+7−0

@@ -1520,6 +1520,13 @@ static const struct dmi_system_id elantech_dmi_force_crc_enabled[] = { · 1519 unmodified lines
1520	1520	DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E544"),
1521	1521	},
1522	1522	},
	1523	+ {
	1524	+ /* Fujitsu LIFEBOOK U745 does not work with crc_enabled == 0 */
	1525	+ .matches = {
	1526	+ DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
	1527	+ DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK U745"),
	1528	+ },
	1529	+ },
1523	1530	#endif
1524	1531	{ }
1525	1532	};

drivers/input/serio/parkbd.c+1−1

@@ -164,7 +164,7 @@ static int parkbd_getport(struct parport *pp) · 163 unmodified lines
164	164	return 0;
165	165	}
166	166
167		−static struct serio * __init parkbd_allocate_serio(void)
	167	+static struct serio *parkbd_allocate_serio(void)
168	168	{
169	169	struct serio *serio;
170	170

drivers/input/touchscreen/Kconfig+17−0

@@ -939,10 +939,27 @@ config TOUCHSCREEN_TSC_SERIO · 938 unmodified lines
939	939	To compile this driver as a module, choose M here: the
940	940	module will be called tsc40.
941	941
	942	+config TOUCHSCREEN_TSC200X_CORE
	943	+ tristate
	944	+
	945	+config TOUCHSCREEN_TSC2004
	946	+ tristate "TSC2004 based touchscreens"
	947	+ depends on I2C
	948	+ select REGMAP_I2C
	949	+ select TOUCHSCREEN_TSC200X_CORE
	950	+ help
	951	+ Say Y here if you have a TSC2004 based touchscreen.
	952	+
	953	+ If unsure, say N.
	954	+
	955	+ To compile this driver as a module, choose M here: the
	956	+ module will be called tsc2004.
	957	+
942	958	config TOUCHSCREEN_TSC2005
943	959	tristate "TSC2005 based touchscreens"
944	960	depends on SPI_MASTER
945	961	select REGMAP_SPI
	962	+ select TOUCHSCREEN_TSC200X_CORE
946	963	help
947	964	Say Y here if you have a TSC2005 based touchscreen.
948	965

drivers/input/touchscreen/Makefile+2−0

@@ -69,6 +69,8 @@ obj-$(CONFIG_TOUCHSCREEN_TOUCHIT213) += touchit213.o · 68 unmodified lines
69	69	obj-$(CONFIG_TOUCHSCREEN_TOUCHRIGHT) += touchright.o
70	70	obj-$(CONFIG_TOUCHSCREEN_TOUCHWIN) += touchwin.o
71	71	obj-$(CONFIG_TOUCHSCREEN_TSC_SERIO) += tsc40.o
	72	+obj-$(CONFIG_TOUCHSCREEN_TSC200X_CORE) += tsc200x-core.o
	73	+obj-$(CONFIG_TOUCHSCREEN_TSC2004) += tsc2004.o
72	74	obj-$(CONFIG_TOUCHSCREEN_TSC2005) += tsc2005.o
73	75	obj-$(CONFIG_TOUCHSCREEN_TSC2007) += tsc2007.o
74	76	obj-$(CONFIG_TOUCHSCREEN_UCB1400) += ucb1400_ts.o

drivers/input/touchscreen/tsc2004.c+83−0

@@ -0,0 +1,83 @@
	1	+/*
	2	+ * TSC2004 touchscreen driver
	3	+ *
	4	+ * Copyright (C) 2015 QWERTY Embedded Design
	5	+ * Copyright (C) 2015 EMAC Inc.
	6	+ *
	7	+ * This program is free software; you can redistribute it and/or modify
	8	+ * it under the terms of the GNU General Public License as published by
	9	+ * the Free Software Foundation; either version 2 of the License, or
	10	+ * (at your option) any later version.
	11	+ *
	12	+ * This program is distributed in the hope that it will be useful,
	13	+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	+ * GNU General Public License for more details.
	16	+ */
	17	+
	18	+#include <linux/module.h>
	19	+#include <linux/input.h>
	20	+#include <linux/of.h>
	21	+#include <linux/i2c.h>
	22	+#include <linux/regmap.h>
	23	+#include "tsc200x-core.h"
	24	+
	25	+static int tsc2004_cmd(struct device *dev, u8 cmd)
	26	+{
	27	+ u8 tx = TSC200X_CMD \| TSC200X_CMD_12BIT \| cmd;
	28	+ s32 data;
	29	+ struct i2c_client *i2c = to_i2c_client(dev);
	30	+
	31	+ data = i2c_smbus_write_byte(i2c, tx);
	32	+ if (data < 0) {
	33	+ dev_err(dev, "%s: failed, command: %x i2c error: %d\n",
	34	+ __func__, cmd, data);
	35	+ return data;
	36	+ }
	37	+
	38	+ return 0;
	39	+}
	40	+
	41	+static int tsc2004_probe(struct i2c_client *i2c,
	42	+ const struct i2c_device_id *id)
	43	+
	44	+{
	45	+ return tsc200x_probe(&i2c->dev, i2c->irq, BUS_I2C,
	46	+ devm_regmap_init_i2c(i2c, &tsc200x_regmap_config),
	47	+ tsc2004_cmd);
	48	+}
	49	+
	50	+static int tsc2004_remove(struct i2c_client *i2c)
	51	+{
	52	+ return tsc200x_remove(&i2c->dev);
	53	+}
	54	+
	55	+static const struct i2c_device_id tsc2004_idtable[] = {
	56	+ { "tsc2004", 0 },
	57	+ { }
	58	+};
	59	+MODULE_DEVICE_TABLE(i2c, tsc2004_idtable);
	60	+
	61	+#ifdef CONFIG_OF
	62	+static const struct of_device_id tsc2004_of_match[] = {
	63	+ { .compatible = "ti,tsc2004" },
	64	+ { /* sentinel */ }
	65	+};
	66	+MODULE_DEVICE_TABLE(of, tsc2004_of_match);
	67	+#endif
	68	+
	69	+static struct i2c_driver tsc2004_driver = {
	70	+ .driver = {
	71	+ .name = "tsc2004",
	72	+ .of_match_table = of_match_ptr(tsc2004_of_match),
	73	+ .pm = &tsc200x_pm_ops,
	74	+ },
	75	+ .id_table = tsc2004_idtable,
	76	+ .probe = tsc2004_probe,
	77	+ .remove = tsc2004_remove,
	78	+};
	79	+module_i2c_driver(tsc2004_driver);
	80	+
	81	+MODULE_AUTHOR("Michael Welling <mwelling@ieee.org>");
	82	+MODULE_DESCRIPTION("TSC2004 Touchscreen Driver");
	83	+MODULE_LICENSE("GPL");

drivers/input/touchscreen/tsc2005.c+18−696

@@ -2,9 +2,10 @@ · 1 unmodified line
2	2	* TSC2005 touchscreen driver
3	3	*
4	4	* Copyright (C) 2006-2010 Nokia Corporation
	5	+ * Copyright (C) 2015 QWERTY Embedded Design
	6	+ * Copyright (C) 2015 EMAC Inc.
5	7	*
6		− * Author: Lauri Leukkunen <lauri.leukkunen@nokia.com>
7		− * based on TSC2301 driver by Klaus K. Pedersen <klaus.k.pedersen@nokia.com>
	8	+ * Based on original tsc2005.c by Lauri Leukkunen <lauri.leukkunen@nokia.com>
8	9	*
9	10	* This program is free software; you can redistribute it and/or modify
10	11	* it under the terms of the GNU General Public License as published by
@@ -15,192 +16,32 @@ · 4 unmodified lines
15	16	* but WITHOUT ANY WARRANTY; without even the implied warranty of
16	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17	18	* GNU General Public License for more details.
18		− *
19		− * You should have received a copy of the GNU General Public License
20		− * along with this program; if not, write to the Free Software
21		− * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22		− *
23	19	*/
24	20
25		−#include <linux/kernel.h>
26	21	#include <linux/module.h>
27	22	#include <linux/input.h>
28		−#include <linux/input/touchscreen.h>
29		−#include <linux/interrupt.h>
30		−#include <linux/delay.h>
31		−#include <linux/pm.h>
32		−#include <linux/of.h>
33	23	#include <linux/spi/spi.h>
34		−#include <linux/spi/tsc2005.h>
35		−#include <linux/regulator/consumer.h>
36	24	#include <linux/regmap.h>
37		−#include <linux/gpio/consumer.h>
38		−
39		−/*
40		− * The touchscreen interface operates as follows:
41		− *
42		− * 1) Pen is pressed against the touchscreen.
43		− * 2) TSC2005 performs AD conversion.
44		− * 3) After the conversion is done TSC2005 drives DAV line down.
45		− * 4) GPIO IRQ is received and tsc2005_irq_thread() is scheduled.
46		− * 5) tsc2005_irq_thread() queues up an spi transfer to fetch the x, y, z1, z2
47		− * values.
48		− * 6) tsc2005_irq_thread() reports coordinates to input layer and sets up
49		− * tsc2005_penup_timer() to be called after TSC2005_PENUP_TIME_MS (40ms).
50		− * 7) When the penup timer expires, there have not been touch or DAV interrupts
51		− * during the last 40ms which means the pen has been lifted.
52		− *
53		− * ESD recovery via a hardware reset is done if the TSC2005 doesn't respond
54		− * after a configurable period (in ms) of activity. If esd_timeout is 0, the
55		− * watchdog is disabled.
56		− */
57		−
58		−/* control byte 1 */
59		−#define TSC2005_CMD 0x80
60		−#define TSC2005_CMD_NORMAL 0x00
61		−#define TSC2005_CMD_STOP 0x01
62		−#define TSC2005_CMD_12BIT 0x04
63		−
64		−/* control byte 0 */
65		−#define TSC2005_REG_READ 0x01 /* R/W access */
66		−#define TSC2005_REG_PND0 0x02 /* Power Not Down Control */
67		−#define TSC2005_REG_X (0x0 << 3)
68		−#define TSC2005_REG_Y (0x1 << 3)
69		−#define TSC2005_REG_Z1 (0x2 << 3)
70		−#define TSC2005_REG_Z2 (0x3 << 3)
71		−#define TSC2005_REG_AUX (0x4 << 3)
72		−#define TSC2005_REG_TEMP1 (0x5 << 3)
73		−#define TSC2005_REG_TEMP2 (0x6 << 3)
74		−#define TSC2005_REG_STATUS (0x7 << 3)
75		−#define TSC2005_REG_AUX_HIGH (0x8 << 3)
76		−#define TSC2005_REG_AUX_LOW (0x9 << 3)
77		−#define TSC2005_REG_TEMP_HIGH (0xA << 3)
78		−#define TSC2005_REG_TEMP_LOW (0xB << 3)
79		−#define TSC2005_REG_CFR0 (0xC << 3)
80		−#define TSC2005_REG_CFR1 (0xD << 3)
81		−#define TSC2005_REG_CFR2 (0xE << 3)
82		−#define TSC2005_REG_CONV_FUNC (0xF << 3)
83		−
84		−/* configuration register 0 */
85		−#define TSC2005_CFR0_PRECHARGE_276US 0x0040
86		−#define TSC2005_CFR0_STABTIME_1MS 0x0300
87		−#define TSC2005_CFR0_CLOCK_1MHZ 0x1000
88		−#define TSC2005_CFR0_RESOLUTION12 0x2000
89		−#define TSC2005_CFR0_PENMODE 0x8000
90		−#define TSC2005_CFR0_INITVALUE (TSC2005_CFR0_STABTIME_1MS \| \
91		− TSC2005_CFR0_CLOCK_1MHZ \| \
92		− TSC2005_CFR0_RESOLUTION12 \| \
93		− TSC2005_CFR0_PRECHARGE_276US \| \
94		− TSC2005_CFR0_PENMODE)
95		−
96		−/* bits common to both read and write of configuration register 0 */
97		−#define TSC2005_CFR0_RW_MASK 0x3fff
98		−
99		−/* configuration register 1 */
100		−#define TSC2005_CFR1_BATCHDELAY_4MS 0x0003
101		−#define TSC2005_CFR1_INITVALUE TSC2005_CFR1_BATCHDELAY_4MS
102		−
103		−/* configuration register 2 */
104		−#define TSC2005_CFR2_MAVE_Z 0x0004
105		−#define TSC2005_CFR2_MAVE_Y 0x0008
106		−#define TSC2005_CFR2_MAVE_X 0x0010
107		−#define TSC2005_CFR2_AVG_7 0x0800
108		−#define TSC2005_CFR2_MEDIUM_15 0x3000
109		−#define TSC2005_CFR2_INITVALUE (TSC2005_CFR2_MAVE_X \| \
110		− TSC2005_CFR2_MAVE_Y \| \
111		− TSC2005_CFR2_MAVE_Z \| \
112		− TSC2005_CFR2_MEDIUM_15 \| \
113		− TSC2005_CFR2_AVG_7)
114		−
115		−#define MAX_12BIT 0xfff
116		−#define TSC2005_DEF_X_FUZZ 4
117		−#define TSC2005_DEF_Y_FUZZ 8
118		−#define TSC2005_DEF_P_FUZZ 2
119		−#define TSC2005_DEF_RESISTOR 280
120		−
121		−#define TSC2005_SPI_MAX_SPEED_HZ 10000000
122		−#define TSC2005_PENUP_TIME_MS 40
123		−
124		−static const struct regmap_range tsc2005_writable_ranges[] = {
125		− regmap_reg_range(TSC2005_REG_AUX_HIGH, TSC2005_REG_CFR2),
126		−};
127		−
128		−static const struct regmap_access_table tsc2005_writable_table = {
129		− .yes_ranges = tsc2005_writable_ranges,
130		− .n_yes_ranges = ARRAY_SIZE(tsc2005_writable_ranges),
131		−};
132		−
133		−static struct regmap_config tsc2005_regmap_config = {
134		− .reg_bits = 8,
135		− .val_bits = 16,
136		− .reg_stride = 0x08,
137		− .max_register = 0x78,
138		− .read_flag_mask = TSC2005_REG_READ,
139		− .write_flag_mask = TSC2005_REG_PND0,
140		− .wr_table = &tsc2005_writable_table,
141		− .use_single_rw = true,
142		−};
143		−
144		−struct tsc2005_data {
145		− u16 x;
146		− u16 y;
147		− u16 z1;
148		− u16 z2;
149		−} __packed;
150		−#define TSC2005_DATA_REGS 4
151		−
152		−struct tsc2005 {
153		− struct spi_device *spi;
154		− struct regmap *regmap;
155		−
156		− struct input_dev *idev;
157		− char phys[32];
158		−
159		− struct mutex mutex;
160		−
161		− /* raw copy of previous x,y,z */
162		− int in_x;
163		− int in_y;
164		− int in_z1;
165		− int in_z2;
166		−
167		− spinlock_t lock;
168		− struct timer_list penup_timer;
	25	+#include "tsc200x-core.h"
169	26
170		− unsigned int esd_timeout;
171		− struct delayed_work esd_work;
172		− unsigned long last_valid_interrupt;
173		−
174		− unsigned int x_plate_ohm;
175		−
176		− bool opened;
177		− bool suspended;
178		−
179		− bool pen_down;
180		−
181		− struct regulator *vio;
182		−
183		− struct gpio_desc *reset_gpio;
184		− void (*set_reset)(bool enable);
185		−};
186		−
187		−static int tsc2005_cmd(struct tsc2005 *ts, u8 cmd)
	27	+static int tsc2005_cmd(struct device *dev, u8 cmd)
188	28	{
189		− u8 tx = TSC2005_CMD \| TSC2005_CMD_12BIT \| cmd;
	29	+ u8 tx = TSC200X_CMD \| TSC200X_CMD_12BIT \| cmd;
190	30	struct spi_transfer xfer = {
191		− .tx_buf = &tx,
192		− .len = 1,
193		− .bits_per_word = 8,
	31	+ .tx_buf = &tx,
	32	+ .len = 1,
	33	+ .bits_per_word = 8,
194	34	};
195	35	struct spi_message msg;
	36	+ struct spi_device *spi = to_spi_device(dev);
196	37	int error;
197	38
198	39	spi_message_init(&msg);
199	40	spi_message_add_tail(&xfer, &msg);
200	41
201		− error = spi_sync(ts->spi, &msg);
	42	+ error = spi_sync(spi, &msg);
202	43	if (error) {
203		− dev_err(&ts->spi->dev, "%s: failed, command: %x, error: %d\n",
	44	+ dev_err(dev, "%s: failed, command: %x, spi error: %d\n",
204	45	__func__, cmd, error);
205	46	return error;
206	47	}
@@ -208,382 +49,10 @@ static int tsc2005_cmd(struct tsc2005 *ts, u8 cmd) · 1 unmodified line
208	49	return 0;
209	50	}
210	51
211		−static void tsc2005_update_pen_state(struct tsc2005 *ts,
212		− int x, int y, int pressure)
213		−{
214		− if (pressure) {
215		− input_report_abs(ts->idev, ABS_X, x);
216		− input_report_abs(ts->idev, ABS_Y, y);
217		− input_report_abs(ts->idev, ABS_PRESSURE, pressure);
218		− if (!ts->pen_down) {
219		− input_report_key(ts->idev, BTN_TOUCH, !!pressure);
220		− ts->pen_down = true;
221		− }
222		− } else {
223		− input_report_abs(ts->idev, ABS_PRESSURE, 0);
224		− if (ts->pen_down) {
225		− input_report_key(ts->idev, BTN_TOUCH, 0);
226		− ts->pen_down = false;
227		− }
228		− }
229		− input_sync(ts->idev);
230		− dev_dbg(&ts->spi->dev, "point(%4d,%4d), pressure (%4d)\n", x, y,
231		− pressure);
232		−}
233		−
234		−static irqreturn_t tsc2005_irq_thread(int irq, void *_ts)
235		−{
236		− struct tsc2005 *ts = _ts;
237		− unsigned long flags;
238		− unsigned int pressure;
239		− struct tsc2005_data tsdata;
240		− int error;
241		−
242		− /* read the coordinates */
243		− error = regmap_bulk_read(ts->regmap, TSC2005_REG_X, &tsdata,
244		− TSC2005_DATA_REGS);
245		− if (unlikely(error))
246		− goto out;
247		−
248		− /* validate position */
249		− if (unlikely(tsdata.x > MAX_12BIT \|\| tsdata.y > MAX_12BIT))
250		− goto out;
251		−
252		− /* Skip reading if the pressure components are out of range */
253		− if (unlikely(tsdata.z1 == 0 \|\| tsdata.z2 > MAX_12BIT))
254		− goto out;
255		− if (unlikely(tsdata.z1 >= tsdata.z2))
256		− goto out;
257		−
258		− /*
259		− * Skip point if this is a pen down with the exact same values as
260		− * the value before pen-up - that implies SPI fed us stale data
261		− */
262		− if (!ts->pen_down &&
263		− ts->in_x == tsdata.x && ts->in_y == tsdata.y &&
264		− ts->in_z1 == tsdata.z1 && ts->in_z2 == tsdata.z2) {
265		− goto out;
266		− }
267		−
268		− /*
269		− * At this point we are happy we have a valid and useful reading.
270		− * Remember it for later comparisons. We may now begin downsampling.
271		− */
272		− ts->in_x = tsdata.x;
273		− ts->in_y = tsdata.y;
274		− ts->in_z1 = tsdata.z1;
275		− ts->in_z2 = tsdata.z2;
276		−
277		− /* Compute touch pressure resistance using equation #1 */
278		− pressure = tsdata.x * (tsdata.z2 - tsdata.z1) / tsdata.z1;
279		− pressure = pressure * ts->x_plate_ohm / 4096;
280		− if (unlikely(pressure > MAX_12BIT))
281		− goto out;
282		−
283		− spin_lock_irqsave(&ts->lock, flags);
284		−
285		− tsc2005_update_pen_state(ts, tsdata.x, tsdata.y, pressure);
286		− mod_timer(&ts->penup_timer,
287		− jiffies + msecs_to_jiffies(TSC2005_PENUP_TIME_MS));
288		−
289		− spin_unlock_irqrestore(&ts->lock, flags);
290		−
291		− ts->last_valid_interrupt = jiffies;
292		−out:
293		− return IRQ_HANDLED;
294		−}
295		−
296		−static void tsc2005_penup_timer(unsigned long data)
297		−{
298		− struct tsc2005 ts = (struct tsc2005 )data;
299		− unsigned long flags;
300		−
301		− spin_lock_irqsave(&ts->lock, flags);
302		− tsc2005_update_pen_state(ts, 0, 0, 0);
303		− spin_unlock_irqrestore(&ts->lock, flags);
304		−}
305		−
306		−static void tsc2005_start_scan(struct tsc2005 *ts)
307		−{
308		− regmap_write(ts->regmap, TSC2005_REG_CFR0, TSC2005_CFR0_INITVALUE);
309		− regmap_write(ts->regmap, TSC2005_REG_CFR1, TSC2005_CFR1_INITVALUE);
310		− regmap_write(ts->regmap, TSC2005_REG_CFR2, TSC2005_CFR2_INITVALUE);
311		− tsc2005_cmd(ts, TSC2005_CMD_NORMAL);
312		−}
313		−
314		−static void tsc2005_stop_scan(struct tsc2005 *ts)
315		−{
316		− tsc2005_cmd(ts, TSC2005_CMD_STOP);
317		−}
318		−
319		−static void tsc2005_set_reset(struct tsc2005 *ts, bool enable)
320		−{
321		− if (ts->reset_gpio)
322		− gpiod_set_value_cansleep(ts->reset_gpio, enable);
323		− else if (ts->set_reset)
324		− ts->set_reset(enable);
325		−}
326		−
327		−/* must be called with ts->mutex held */
328		−static void __tsc2005_disable(struct tsc2005 *ts)
329		−{
330		− tsc2005_stop_scan(ts);
331		−
332		− disable_irq(ts->spi->irq);
333		− del_timer_sync(&ts->penup_timer);
334		−
335		− cancel_delayed_work_sync(&ts->esd_work);
336		−
337		− enable_irq(ts->spi->irq);
338		−}
339		−
340		−/* must be called with ts->mutex held */
341		−static void __tsc2005_enable(struct tsc2005 *ts)
342		−{
343		− tsc2005_start_scan(ts);
344		−
345		− if (ts->esd_timeout && (ts->set_reset \|\| ts->reset_gpio)) {
346		− ts->last_valid_interrupt = jiffies;
347		− schedule_delayed_work(&ts->esd_work,
348		− round_jiffies_relative(
349		− msecs_to_jiffies(ts->esd_timeout)));
350		− }
351		−
352		−}
353		−
354		−static ssize_t tsc2005_selftest_show(struct device *dev,
355		− struct device_attribute *attr,
356		− char *buf)
357		−{
358		− struct tsc2005 *ts = dev_get_drvdata(dev);
359		− unsigned int temp_high;
360		− unsigned int temp_high_orig;
361		− unsigned int temp_high_test;
362		− bool success = true;
363		− int error;
364		−
365		− mutex_lock(&ts->mutex);
366		−
367		− /*
368		− * Test TSC2005 communications via temp high register.
369		− */
370		− __tsc2005_disable(ts);
371		−
372		− error = regmap_read(ts->regmap, TSC2005_REG_TEMP_HIGH, &temp_high_orig);
373		− if (error) {
374		− dev_warn(dev, "selftest failed: read error %d\n", error);
375		− success = false;
376		− goto out;
377		− }
378		−
379		− temp_high_test = (temp_high_orig - 1) & MAX_12BIT;
380		−
381		− error = regmap_write(ts->regmap, TSC2005_REG_TEMP_HIGH, temp_high_test);
382		− if (error) {
383		− dev_warn(dev, "selftest failed: write error %d\n", error);
384		− success = false;
385		− goto out;
386		− }
387		−
388		− error = regmap_read(ts->regmap, TSC2005_REG_TEMP_HIGH, &temp_high);
389		− if (error) {
390		− dev_warn(dev, "selftest failed: read error %d after write\n",
391		− error);
392		− success = false;
393		− goto out;
394		− }
395		−
396		− if (temp_high != temp_high_test) {
397		− dev_warn(dev, "selftest failed: %d != %d\n",
398		− temp_high, temp_high_test);
399		− success = false;
400		− }
401		−
402		− /* hardware reset */
403		− tsc2005_set_reset(ts, false);
404		− usleep_range(100, 500); /* only 10us required */
405		− tsc2005_set_reset(ts, true);
406		−
407		− if (!success)
408		− goto out;
409		−
410		− /* test that the reset really happened */
411		− error = regmap_read(ts->regmap, TSC2005_REG_TEMP_HIGH, &temp_high);
412		− if (error) {
413		− dev_warn(dev, "selftest failed: read error %d after reset\n",
414		− error);
415		− success = false;
416		− goto out;
417		− }
418		−
419		− if (temp_high != temp_high_orig) {
420		− dev_warn(dev, "selftest failed after reset: %d != %d\n",
421		− temp_high, temp_high_orig);
422		− success = false;
423		− }
424		−
425		−out:
426		− __tsc2005_enable(ts);
427		− mutex_unlock(&ts->mutex);
428		−
429		− return sprintf(buf, "%d\n", success);
430		−}
431		−
432		−static DEVICE_ATTR(selftest, S_IRUGO, tsc2005_selftest_show, NULL);
433		−
434		−static struct attribute *tsc2005_attrs[] = {
435		− &dev_attr_selftest.attr,
436		− NULL
437		−};
438		−
439		−static umode_t tsc2005_attr_is_visible(struct kobject *kobj,
440		− struct attribute *attr, int n)
441		−{
442		− struct device *dev = container_of(kobj, struct device, kobj);
443		− struct tsc2005 *ts = dev_get_drvdata(dev);
444		− umode_t mode = attr->mode;
445		−
446		− if (attr == &dev_attr_selftest.attr) {
447		− if (!ts->set_reset && !ts->reset_gpio)
448		− mode = 0;
449		− }
450		−
451		− return mode;
452		−}
453		−
454		−static const struct attribute_group tsc2005_attr_group = {
455		− .is_visible = tsc2005_attr_is_visible,
456		− .attrs = tsc2005_attrs,
457		−};
458		−
459		−static void tsc2005_esd_work(struct work_struct *work)
460		−{
461		− struct tsc2005 *ts = container_of(work, struct tsc2005, esd_work.work);
462		− int error;
463		− unsigned int r;
464		−
465		− if (!mutex_trylock(&ts->mutex)) {
466		− /*
467		− * If the mutex is taken, it means that disable or enable is in
468		− * progress. In that case just reschedule the work. If the work
469		− * is not needed, it will be canceled by disable.
470		− */
471		− goto reschedule;
472		− }
473		−
474		− if (time_is_after_jiffies(ts->last_valid_interrupt +
475		− msecs_to_jiffies(ts->esd_timeout)))
476		− goto out;
477		−
478		− /* We should be able to read register without disabling interrupts. */
479		− error = regmap_read(ts->regmap, TSC2005_REG_CFR0, &r);
480		− if (!error &&
481		− !((r ^ TSC2005_CFR0_INITVALUE) & TSC2005_CFR0_RW_MASK)) {
482		− goto out;
483		− }
484		−
485		− /*
486		− * If we could not read our known value from configuration register 0
487		− * then we should reset the controller as if from power-up and start
488		− * scanning again.
489		− */
490		− dev_info(&ts->spi->dev, "TSC2005 not responding - resetting\n");
491		−
492		− disable_irq(ts->spi->irq);
493		− del_timer_sync(&ts->penup_timer);
494		−
495		− tsc2005_update_pen_state(ts, 0, 0, 0);
496		−
497		− tsc2005_set_reset(ts, false);
498		− usleep_range(100, 500); /* only 10us required */
499		− tsc2005_set_reset(ts, true);
500		−
501		− enable_irq(ts->spi->irq);
502		− tsc2005_start_scan(ts);
503		−
504		−out:
505		− mutex_unlock(&ts->mutex);
506		−reschedule:
507		− /* re-arm the watchdog */
508		− schedule_delayed_work(&ts->esd_work,
509		− round_jiffies_relative(
510		− msecs_to_jiffies(ts->esd_timeout)));
511		−}
512		−
513		−static int tsc2005_open(struct input_dev *input)
514		−{
515		− struct tsc2005 *ts = input_get_drvdata(input);
516		−
517		− mutex_lock(&ts->mutex);
518		−
519		− if (!ts->suspended)
520		− __tsc2005_enable(ts);
521		−
522		− ts->opened = true;
523		−
524		− mutex_unlock(&ts->mutex);
525		−
526		− return 0;
527		−}
528		−
529		−static void tsc2005_close(struct input_dev *input)
530		−{
531		− struct tsc2005 *ts = input_get_drvdata(input);
532		−
533		− mutex_lock(&ts->mutex);
534		−
535		− if (!ts->suspended)
536		− __tsc2005_disable(ts);
537		−
538		− ts->opened = false;
539		−
540		− mutex_unlock(&ts->mutex);
541		−}
542		−
543	52	static int tsc2005_probe(struct spi_device *spi)
544	53	{
545		− const struct tsc2005_platform_data *pdata = dev_get_platdata(&spi->dev);
546		− struct device_node *np = spi->dev.of_node;
547		−
548		− struct tsc2005 *ts;
549		− struct input_dev *input_dev;
550		− unsigned int max_x = MAX_12BIT;
551		− unsigned int max_y = MAX_12BIT;
552		− unsigned int max_p = MAX_12BIT;
553		− unsigned int fudge_x = TSC2005_DEF_X_FUZZ;
554		− unsigned int fudge_y = TSC2005_DEF_Y_FUZZ;
555		− unsigned int fudge_p = TSC2005_DEF_P_FUZZ;
556		− unsigned int x_plate_ohm = TSC2005_DEF_RESISTOR;
557		− unsigned int esd_timeout;
558	54	int error;
559	55
560		− if (!np && !pdata) {
561		− dev_err(&spi->dev, "no platform data\n");
562		− return -ENODEV;
563		− }
564		−
565		− if (spi->irq <= 0) {
566		− dev_err(&spi->dev, "no irq\n");
567		− return -ENODEV;
568		− }
569		−
570		− if (pdata) {
571		− fudge_x = pdata->ts_x_fudge;
572		− fudge_y = pdata->ts_y_fudge;
573		− fudge_p = pdata->ts_pressure_fudge;
574		− max_x = pdata->ts_x_max;
575		− max_y = pdata->ts_y_max;
576		− max_p = pdata->ts_pressure_max;
577		− x_plate_ohm = pdata->ts_x_plate_ohm;
578		− esd_timeout = pdata->esd_timeout_ms;
579		− } else {
580		− x_plate_ohm = TSC2005_DEF_RESISTOR;
581		− of_property_read_u32(np, "ti,x-plate-ohms", &x_plate_ohm);
582		− esd_timeout = 0;
583		− of_property_read_u32(np, "ti,esd-recovery-timeout-ms",
584		− &esd_timeout);
585		− }
586		−
587	56	spi->mode = SPI_MODE_0;
588	57	spi->bits_per_word = 8;
589	58	if (!spi->max_speed_hz)
@@ -593,174 +62,27 @@ static int tsc2005_probe(struct spi_device *spi) · 3 unmodified lines
593	62	if (error)
594	63	return error;
595	64
596		− ts = devm_kzalloc(&spi->dev, sizeof(*ts), GFP_KERNEL);
597		− if (!ts)
598		− return -ENOMEM;
599		−
600		− input_dev = devm_input_allocate_device(&spi->dev);
601		− if (!input_dev)
602		− return -ENOMEM;
603		−
604		− ts->spi = spi;
605		− ts->idev = input_dev;
606		−
607		− ts->regmap = devm_regmap_init_spi(spi, &tsc2005_regmap_config);
608		− if (IS_ERR(ts->regmap))
609		− return PTR_ERR(ts->regmap);
610		−
611		− ts->x_plate_ohm = x_plate_ohm;
612		− ts->esd_timeout = esd_timeout;
613		−
614		− ts->reset_gpio = devm_gpiod_get_optional(&spi->dev, "reset",
615		− GPIOD_OUT_HIGH);
616		− if (IS_ERR(ts->reset_gpio)) {
617		− error = PTR_ERR(ts->reset_gpio);
618		− dev_err(&spi->dev, "error acquiring reset gpio: %d\n", error);
619		− return error;
620		− }
621		−
622		− ts->vio = devm_regulator_get_optional(&spi->dev, "vio");
623		− if (IS_ERR(ts->vio)) {
624		− error = PTR_ERR(ts->vio);
625		− dev_err(&spi->dev, "vio regulator missing (%d)", error);
626		− return error;
627		− }
628		−
629		− if (!ts->reset_gpio && pdata)
630		− ts->set_reset = pdata->set_reset;
631		−
632		− mutex_init(&ts->mutex);
633		−
634		− spin_lock_init(&ts->lock);
635		− setup_timer(&ts->penup_timer, tsc2005_penup_timer, (unsigned long)ts);
636		−
637		− INIT_DELAYED_WORK(&ts->esd_work, tsc2005_esd_work);
638		−
639		− snprintf(ts->phys, sizeof(ts->phys),
640		− "%s/input-ts", dev_name(&spi->dev));
641		−
642		− input_dev->name = "TSC2005 touchscreen";
643		− input_dev->phys = ts->phys;
644		− input_dev->id.bustype = BUS_SPI;
645		− input_dev->dev.parent = &spi->dev;
646		− input_dev->evbit[0] = BIT(EV_ABS) \| BIT(EV_KEY);
647		− input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
648		−
649		− input_set_abs_params(input_dev, ABS_X, 0, max_x, fudge_x, 0);
650		− input_set_abs_params(input_dev, ABS_Y, 0, max_y, fudge_y, 0);
651		− input_set_abs_params(input_dev, ABS_PRESSURE, 0, max_p, fudge_p, 0);
652		−
653		− if (np)
654		− touchscreen_parse_properties(input_dev, false);
655		−
656		− input_dev->open = tsc2005_open;
657		− input_dev->close = tsc2005_close;
658		−
659		− input_set_drvdata(input_dev, ts);
660		−
661		− /* Ensure the touchscreen is off */
662		− tsc2005_stop_scan(ts);
663		−
664		− error = devm_request_threaded_irq(&spi->dev, spi->irq, NULL,
665		− tsc2005_irq_thread,
666		− IRQF_TRIGGER_RISING \| IRQF_ONESHOT,
667		− "tsc2005", ts);
668		− if (error) {
669		− dev_err(&spi->dev, "Failed to request irq, err: %d\n", error);
670		− return error;
671		− }
672		−
673		− /* enable regulator for DT */
674		− if (ts->vio) {
675		− error = regulator_enable(ts->vio);
676		− if (error)
677		− return error;
678		− }
679		−
680		− dev_set_drvdata(&spi->dev, ts);
681		− error = sysfs_create_group(&spi->dev.kobj, &tsc2005_attr_group);
682		− if (error) {
683		− dev_err(&spi->dev,
684		− "Failed to create sysfs attributes, err: %d\n", error);
685		− goto disable_regulator;
686		− }
687		−
688		− error = input_register_device(ts->idev);
689		− if (error) {
690		− dev_err(&spi->dev,
691		− "Failed to register input device, err: %d\n", error);
692		− goto err_remove_sysfs;
693		− }
694		−
695		− irq_set_irq_wake(spi->irq, 1);
696		− return 0;
697		−
698		−err_remove_sysfs:
699		− sysfs_remove_group(&spi->dev.kobj, &tsc2005_attr_group);
700		−disable_regulator:
701		− if (ts->vio)
702		− regulator_disable(ts->vio);
703		− return error;
	65	+ return tsc200x_probe(&spi->dev, spi->irq, BUS_SPI,
	66	+ devm_regmap_init_spi(spi, &tsc200x_regmap_config),
	67	+ tsc2005_cmd);
704	68	}
705	69
706	70	static int tsc2005_remove(struct spi_device *spi)
707	71	{
708		− struct tsc2005 *ts = dev_get_drvdata(&spi->dev);
709		−
710		− sysfs_remove_group(&spi->dev.kobj, &tsc2005_attr_group);
711		−
712		− if (ts->vio)
713		− regulator_disable(ts->vio);
714		−
715		− return 0;
716		−}
717		−
718		−static int __maybe_unused tsc2005_suspend(struct device *dev)
719		−{
720		− struct tsc2005 *ts = dev_get_drvdata(dev);
721		−
722		− mutex_lock(&ts->mutex);
723		−
724		− if (!ts->suspended && ts->opened)
725		− __tsc2005_disable(ts);
726		−
727		− ts->suspended = true;
728		−
729		− mutex_unlock(&ts->mutex);
730		−
731		− return 0;
732		−}
733		−
734		−static int __maybe_unused tsc2005_resume(struct device *dev)
735		−{
736		− struct tsc2005 *ts = dev_get_drvdata(dev);
737		−
738		− mutex_lock(&ts->mutex);
739		−
740		− if (ts->suspended && ts->opened)
741		− __tsc2005_enable(ts);
742		−
743		− ts->suspended = false;
744		−
745		− mutex_unlock(&ts->mutex);
746		−
747		− return 0;
	72	+ return tsc200x_remove(&spi->dev);
748	73	}
749	74
750		−static SIMPLE_DEV_PM_OPS(tsc2005_pm_ops, tsc2005_suspend, tsc2005_resume);
751		−
752	75	static struct spi_driver tsc2005_driver = {
753	76	.driver = {
754	77	.name = "tsc2005",
755		− .pm = &tsc2005_pm_ops,
	78	+ .pm = &tsc200x_pm_ops,
756	79	},
757	80	.probe = tsc2005_probe,
758	81	.remove = tsc2005_remove,
759	82	};
760		−
761	83	module_spi_driver(tsc2005_driver);
762	84
763		−MODULE_AUTHOR("Lauri Leukkunen <lauri.leukkunen@nokia.com>");
	85	+MODULE_AUTHOR("Michael Welling <mwelling@ieee.org>");
764	86	MODULE_DESCRIPTION("TSC2005 Touchscreen Driver");
765	87	MODULE_LICENSE("GPL");
766	88	MODULE_ALIAS("spi:tsc2005");

drivers/input/touchscreen/tsc200x-core.c+665−0

@@ -0,0 +1,665 @@
	1	+/*
	2	+ * TSC2004/TSC2005 touchscreen driver core
	3	+ *
	4	+ * Copyright (C) 2006-2010 Nokia Corporation
	5	+ * Copyright (C) 2015 QWERTY Embedded Design
	6	+ * Copyright (C) 2015 EMAC Inc.
	7	+ *
	8	+ * Author: Lauri Leukkunen <lauri.leukkunen@nokia.com>
	9	+ * based on TSC2301 driver by Klaus K. Pedersen <klaus.k.pedersen@nokia.com>
	10	+ *
	11	+ * This program is free software; you can redistribute it and/or modify
	12	+ * it under the terms of the GNU General Public License as published by
	13	+ * the Free Software Foundation; either version 2 of the License, or
	14	+ * (at your option) any later version.
	15	+ *
	16	+ * This program is distributed in the hope that it will be useful,
	17	+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
	18	+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	19	+ * GNU General Public License for more details.
	20	+ */
	21	+
	22	+#include <linux/kernel.h>
	23	+#include <linux/module.h>
	24	+#include <linux/input.h>
	25	+#include <linux/input/touchscreen.h>
	26	+#include <linux/interrupt.h>
	27	+#include <linux/delay.h>
	28	+#include <linux/pm.h>
	29	+#include <linux/of.h>
	30	+#include <linux/spi/tsc2005.h>
	31	+#include <linux/regulator/consumer.h>
	32	+#include <linux/regmap.h>
	33	+#include <linux/gpio/consumer.h>
	34	+#include "tsc200x-core.h"
	35	+
	36	+/*
	37	+ * The touchscreen interface operates as follows:
	38	+ *
	39	+ * 1) Pen is pressed against the touchscreen.
	40	+ * 2) TSC200X performs AD conversion.
	41	+ * 3) After the conversion is done TSC200X drives DAV line down.
	42	+ * 4) GPIO IRQ is received and tsc200x_irq_thread() is scheduled.
	43	+ * 5) tsc200x_irq_thread() queues up a transfer to fetch the x, y, z1, z2
	44	+ * values.
	45	+ * 6) tsc200x_irq_thread() reports coordinates to input layer and sets up
	46	+ * tsc200x_penup_timer() to be called after TSC200X_PENUP_TIME_MS (40ms).
	47	+ * 7) When the penup timer expires, there have not been touch or DAV interrupts
	48	+ * during the last 40ms which means the pen has been lifted.
	49	+ *
	50	+ * ESD recovery via a hardware reset is done if the TSC200X doesn't respond
	51	+ * after a configurable period (in ms) of activity. If esd_timeout is 0, the
	52	+ * watchdog is disabled.
	53	+ */
	54	+
	55	+static const struct regmap_range tsc200x_writable_ranges[] = {
	56	+ regmap_reg_range(TSC200X_REG_AUX_HIGH, TSC200X_REG_CFR2),
	57	+};
	58	+
	59	+static const struct regmap_access_table tsc200x_writable_table = {
	60	+ .yes_ranges = tsc200x_writable_ranges,
	61	+ .n_yes_ranges = ARRAY_SIZE(tsc200x_writable_ranges),
	62	+};
	63	+
	64	+const struct regmap_config tsc200x_regmap_config = {
	65	+ .reg_bits = 8,
	66	+ .val_bits = 16,
	67	+ .reg_stride = 0x08,
	68	+ .max_register = 0x78,
	69	+ .read_flag_mask = TSC200X_REG_READ,
	70	+ .write_flag_mask = TSC200X_REG_PND0,
	71	+ .wr_table = &tsc200x_writable_table,
	72	+ .use_single_rw = true,
	73	+};
	74	+EXPORT_SYMBOL_GPL(tsc200x_regmap_config);
	75	+
	76	+struct tsc200x_data {
	77	+ u16 x;
	78	+ u16 y;
	79	+ u16 z1;
	80	+ u16 z2;
	81	+} __packed;
	82	+#define TSC200X_DATA_REGS 4
	83	+
	84	+struct tsc200x {
	85	+ struct device *dev;
	86	+ struct regmap *regmap;
	87	+ __u16 bustype;
	88	+
	89	+ struct input_dev *idev;
	90	+ char phys[32];
	91	+
	92	+ struct mutex mutex;
	93	+
	94	+ /* raw copy of previous x,y,z */
	95	+ int in_x;
	96	+ int in_y;
	97	+ int in_z1;
	98	+ int in_z2;
	99	+
	100	+ spinlock_t lock;
	101	+ struct timer_list penup_timer;
	102	+
	103	+ unsigned int esd_timeout;
	104	+ struct delayed_work esd_work;
	105	+ unsigned long last_valid_interrupt;
	106	+
	107	+ unsigned int x_plate_ohm;
	108	+
	109	+ bool opened;
	110	+ bool suspended;
	111	+
	112	+ bool pen_down;
	113	+
	114	+ struct regulator *vio;
	115	+
	116	+ struct gpio_desc *reset_gpio;
	117	+ void (*set_reset)(bool enable);
	118	+ int (tsc200x_cmd)(struct device dev, u8 cmd);
	119	+ int irq;
	120	+};
	121	+
	122	+static void tsc200x_update_pen_state(struct tsc200x *ts,
	123	+ int x, int y, int pressure)
	124	+{
	125	+ if (pressure) {
	126	+ input_report_abs(ts->idev, ABS_X, x);
	127	+ input_report_abs(ts->idev, ABS_Y, y);
	128	+ input_report_abs(ts->idev, ABS_PRESSURE, pressure);
	129	+ if (!ts->pen_down) {
	130	+ input_report_key(ts->idev, BTN_TOUCH, !!pressure);
	131	+ ts->pen_down = true;
	132	+ }
	133	+ } else {
	134	+ input_report_abs(ts->idev, ABS_PRESSURE, 0);
	135	+ if (ts->pen_down) {
	136	+ input_report_key(ts->idev, BTN_TOUCH, 0);
	137	+ ts->pen_down = false;
	138	+ }
	139	+ }
	140	+ input_sync(ts->idev);
	141	+ dev_dbg(ts->dev, "point(%4d,%4d), pressure (%4d)\n", x, y,
	142	+ pressure);
	143	+}
	144	+
	145	+static irqreturn_t tsc200x_irq_thread(int irq, void *_ts)
	146	+{
	147	+ struct tsc200x *ts = _ts;
	148	+ unsigned long flags;
	149	+ unsigned int pressure;
	150	+ struct tsc200x_data tsdata;
	151	+ int error;
	152	+
	153	+ /* read the coordinates */
	154	+ error = regmap_bulk_read(ts->regmap, TSC200X_REG_X, &tsdata,
	155	+ TSC200X_DATA_REGS);
	156	+ if (unlikely(error))
	157	+ goto out;
	158	+
	159	+ /* validate position */
	160	+ if (unlikely(tsdata.x > MAX_12BIT \|\| tsdata.y > MAX_12BIT))
	161	+ goto out;
	162	+
	163	+ /* Skip reading if the pressure components are out of range */
	164	+ if (unlikely(tsdata.z1 == 0 \|\| tsdata.z2 > MAX_12BIT))
	165	+ goto out;
	166	+ if (unlikely(tsdata.z1 >= tsdata.z2))
	167	+ goto out;
	168	+
	169	+ /*
	170	+ * Skip point if this is a pen down with the exact same values as
	171	+ * the value before pen-up - that implies SPI fed us stale data
	172	+ */
	173	+ if (!ts->pen_down &&
	174	+ ts->in_x == tsdata.x && ts->in_y == tsdata.y &&
	175	+ ts->in_z1 == tsdata.z1 && ts->in_z2 == tsdata.z2) {
	176	+ goto out;
	177	+ }
	178	+
	179	+ /*
	180	+ * At this point we are happy we have a valid and useful reading.
	181	+ * Remember it for later comparisons. We may now begin downsampling.
	182	+ */
	183	+ ts->in_x = tsdata.x;
	184	+ ts->in_y = tsdata.y;
	185	+ ts->in_z1 = tsdata.z1;
	186	+ ts->in_z2 = tsdata.z2;
	187	+
	188	+ /* Compute touch pressure resistance using equation #1 */
	189	+ pressure = tsdata.x * (tsdata.z2 - tsdata.z1) / tsdata.z1;
	190	+ pressure = pressure * ts->x_plate_ohm / 4096;
	191	+ if (unlikely(pressure > MAX_12BIT))
	192	+ goto out;
	193	+
	194	+ spin_lock_irqsave(&ts->lock, flags);
	195	+
	196	+ tsc200x_update_pen_state(ts, tsdata.x, tsdata.y, pressure);
	197	+ mod_timer(&ts->penup_timer,
	198	+ jiffies + msecs_to_jiffies(TSC200X_PENUP_TIME_MS));
	199	+
	200	+ spin_unlock_irqrestore(&ts->lock, flags);
	201	+
	202	+ ts->last_valid_interrupt = jiffies;
	203	+out:
	204	+ return IRQ_HANDLED;
	205	+}
	206	+
	207	+static void tsc200x_penup_timer(unsigned long data)
	208	+{
	209	+ struct tsc200x ts = (struct tsc200x )data;
	210	+ unsigned long flags;
	211	+
	212	+ spin_lock_irqsave(&ts->lock, flags);
	213	+ tsc200x_update_pen_state(ts, 0, 0, 0);
	214	+ spin_unlock_irqrestore(&ts->lock, flags);
	215	+}
	216	+
	217	+static void tsc200x_start_scan(struct tsc200x *ts)
	218	+{
	219	+ regmap_write(ts->regmap, TSC200X_REG_CFR0, TSC200X_CFR0_INITVALUE);
	220	+ regmap_write(ts->regmap, TSC200X_REG_CFR1, TSC200X_CFR1_INITVALUE);
	221	+ regmap_write(ts->regmap, TSC200X_REG_CFR2, TSC200X_CFR2_INITVALUE);
	222	+ ts->tsc200x_cmd(ts->dev, TSC200X_CMD_NORMAL);
	223	+}
	224	+
	225	+static void tsc200x_stop_scan(struct tsc200x *ts)
	226	+{
	227	+ ts->tsc200x_cmd(ts->dev, TSC200X_CMD_STOP);
	228	+}
	229	+
	230	+static void tsc200x_set_reset(struct tsc200x *ts, bool enable)
	231	+{
	232	+ if (ts->reset_gpio)
	233	+ gpiod_set_value_cansleep(ts->reset_gpio, enable);
	234	+ else if (ts->set_reset)
	235	+ ts->set_reset(enable);
	236	+}
	237	+
	238	+/* must be called with ts->mutex held */
	239	+static void __tsc200x_disable(struct tsc200x *ts)
	240	+{
	241	+ tsc200x_stop_scan(ts);
	242	+
	243	+ disable_irq(ts->irq);
	244	+ del_timer_sync(&ts->penup_timer);
	245	+
	246	+ cancel_delayed_work_sync(&ts->esd_work);
	247	+
	248	+ enable_irq(ts->irq);
	249	+}
	250	+
	251	+/* must be called with ts->mutex held */
	252	+static void __tsc200x_enable(struct tsc200x *ts)
	253	+{
	254	+ tsc200x_start_scan(ts);
	255	+
	256	+ if (ts->esd_timeout && (ts->set_reset \|\| ts->reset_gpio)) {
	257	+ ts->last_valid_interrupt = jiffies;
	258	+ schedule_delayed_work(&ts->esd_work,
	259	+ round_jiffies_relative(
	260	+ msecs_to_jiffies(ts->esd_timeout)));
	261	+ }
	262	+}
	263	+
	264	+static ssize_t tsc200x_selftest_show(struct device *dev,
	265	+ struct device_attribute *attr,
	266	+ char *buf)
	267	+{
	268	+ struct tsc200x *ts = dev_get_drvdata(dev);
	269	+ unsigned int temp_high;
	270	+ unsigned int temp_high_orig;
	271	+ unsigned int temp_high_test;
	272	+ bool success = true;
	273	+ int error;
	274	+
	275	+ mutex_lock(&ts->mutex);
	276	+
	277	+ /*
	278	+ * Test TSC200X communications via temp high register.
	279	+ */
	280	+ __tsc200x_disable(ts);
	281	+
	282	+ error = regmap_read(ts->regmap, TSC200X_REG_TEMP_HIGH, &temp_high_orig);
	283	+ if (error) {
	284	+ dev_warn(dev, "selftest failed: read error %d\n", error);
	285	+ success = false;
	286	+ goto out;
	287	+ }
	288	+
	289	+ temp_high_test = (temp_high_orig - 1) & MAX_12BIT;
	290	+
	291	+ error = regmap_write(ts->regmap, TSC200X_REG_TEMP_HIGH, temp_high_test);
	292	+ if (error) {
	293	+ dev_warn(dev, "selftest failed: write error %d\n", error);
	294	+ success = false;
	295	+ goto out;
	296	+ }
	297	+
	298	+ error = regmap_read(ts->regmap, TSC200X_REG_TEMP_HIGH, &temp_high);
	299	+ if (error) {
	300	+ dev_warn(dev, "selftest failed: read error %d after write\n",
	301	+ error);
	302	+ success = false;
	303	+ goto out;
	304	+ }
	305	+
	306	+ if (temp_high != temp_high_test) {
	307	+ dev_warn(dev, "selftest failed: %d != %d\n",
	308	+ temp_high, temp_high_test);
	309	+ success = false;
	310	+ }
	311	+
	312	+ /* hardware reset */
	313	+ tsc200x_set_reset(ts, false);
	314	+ usleep_range(100, 500); /* only 10us required */
	315	+ tsc200x_set_reset(ts, true);
	316	+
	317	+ if (!success)
	318	+ goto out;
	319	+
	320	+ /* test that the reset really happened */
	321	+ error = regmap_read(ts->regmap, TSC200X_REG_TEMP_HIGH, &temp_high);
	322	+ if (error) {
	323	+ dev_warn(dev, "selftest failed: read error %d after reset\n",
	324	+ error);
	325	+ success = false;
	326	+ goto out;
	327	+ }
	328	+
	329	+ if (temp_high != temp_high_orig) {
	330	+ dev_warn(dev, "selftest failed after reset: %d != %d\n",
	331	+ temp_high, temp_high_orig);
	332	+ success = false;
	333	+ }
	334	+
	335	+out:
	336	+ __tsc200x_enable(ts);
	337	+ mutex_unlock(&ts->mutex);
	338	+
	339	+ return sprintf(buf, "%d\n", success);
	340	+}
	341	+
	342	+static DEVICE_ATTR(selftest, S_IRUGO, tsc200x_selftest_show, NULL);
	343	+
	344	+static struct attribute *tsc200x_attrs[] = {
	345	+ &dev_attr_selftest.attr,
	346	+ NULL
	347	+};
	348	+
	349	+static umode_t tsc200x_attr_is_visible(struct kobject *kobj,
	350	+ struct attribute *attr, int n)
	351	+{
	352	+ struct device *dev = container_of(kobj, struct device, kobj);
	353	+ struct tsc200x *ts = dev_get_drvdata(dev);
	354	+ umode_t mode = attr->mode;
	355	+
	356	+ if (attr == &dev_attr_selftest.attr) {
	357	+ if (!ts->set_reset && !ts->reset_gpio)
	358	+ mode = 0;
	359	+ }
	360	+
	361	+ return mode;
	362	+}
	363	+
	364	+static const struct attribute_group tsc200x_attr_group = {
	365	+ .is_visible = tsc200x_attr_is_visible,
	366	+ .attrs = tsc200x_attrs,
	367	+};
	368	+
	369	+static void tsc200x_esd_work(struct work_struct *work)
	370	+{
	371	+ struct tsc200x *ts = container_of(work, struct tsc200x, esd_work.work);
	372	+ int error;
	373	+ unsigned int r;
	374	+
	375	+ if (!mutex_trylock(&ts->mutex)) {
	376	+ /*
	377	+ * If the mutex is taken, it means that disable or enable is in
	378	+ * progress. In that case just reschedule the work. If the work
	379	+ * is not needed, it will be canceled by disable.
	380	+ */
	381	+ goto reschedule;
	382	+ }
	383	+
	384	+ if (time_is_after_jiffies(ts->last_valid_interrupt +
	385	+ msecs_to_jiffies(ts->esd_timeout)))
	386	+ goto out;
	387	+
	388	+ /* We should be able to read register without disabling interrupts. */
	389	+ error = regmap_read(ts->regmap, TSC200X_REG_CFR0, &r);
	390	+ if (!error &&
	391	+ !((r ^ TSC200X_CFR0_INITVALUE) & TSC200X_CFR0_RW_MASK)) {
	392	+ goto out;
	393	+ }
	394	+
	395	+ /*
	396	+ * If we could not read our known value from configuration register 0
	397	+ * then we should reset the controller as if from power-up and start
	398	+ * scanning again.
	399	+ */
	400	+ dev_info(ts->dev, "TSC200X not responding - resetting\n");
	401	+
	402	+ disable_irq(ts->irq);
	403	+ del_timer_sync(&ts->penup_timer);
	404	+
	405	+ tsc200x_update_pen_state(ts, 0, 0, 0);
	406	+
	407	+ tsc200x_set_reset(ts, false);
	408	+ usleep_range(100, 500); /* only 10us required */
	409	+ tsc200x_set_reset(ts, true);
	410	+
	411	+ enable_irq(ts->irq);
	412	+ tsc200x_start_scan(ts);
	413	+
	414	+out:
	415	+ mutex_unlock(&ts->mutex);
	416	+reschedule:
	417	+ /* re-arm the watchdog */
	418	+ schedule_delayed_work(&ts->esd_work,
	419	+ round_jiffies_relative(
	420	+ msecs_to_jiffies(ts->esd_timeout)));
	421	+}
	422	+
	423	+static int tsc200x_open(struct input_dev *input)
	424	+{
	425	+ struct tsc200x *ts = input_get_drvdata(input);
	426	+
	427	+ mutex_lock(&ts->mutex);
	428	+
	429	+ if (!ts->suspended)
	430	+ __tsc200x_enable(ts);
	431	+
	432	+ ts->opened = true;
	433	+
	434	+ mutex_unlock(&ts->mutex);
	435	+
	436	+ return 0;
	437	+}
	438	+
	439	+static void tsc200x_close(struct input_dev *input)
	440	+{
	441	+ struct tsc200x *ts = input_get_drvdata(input);
	442	+
	443	+ mutex_lock(&ts->mutex);
	444	+
	445	+ if (!ts->suspended)
	446	+ __tsc200x_disable(ts);
	447	+
	448	+ ts->opened = false;
	449	+
	450	+ mutex_unlock(&ts->mutex);
	451	+}
	452	+
	453	+int tsc200x_probe(struct device *dev, int irq, __u16 bustype,
	454	+ struct regmap *regmap,
	455	+ int (tsc200x_cmd)(struct device dev, u8 cmd))
	456	+{
	457	+ const struct tsc2005_platform_data *pdata = dev_get_platdata(dev);
	458	+ struct device_node *np = dev->of_node;
	459	+
	460	+ struct tsc200x *ts;
	461	+ struct input_dev *input_dev;
	462	+ unsigned int max_x = MAX_12BIT;
	463	+ unsigned int max_y = MAX_12BIT;
	464	+ unsigned int max_p = MAX_12BIT;
	465	+ unsigned int fudge_x = TSC200X_DEF_X_FUZZ;
	466	+ unsigned int fudge_y = TSC200X_DEF_Y_FUZZ;
	467	+ unsigned int fudge_p = TSC200X_DEF_P_FUZZ;
	468	+ unsigned int x_plate_ohm = TSC200X_DEF_RESISTOR;
	469	+ unsigned int esd_timeout;
	470	+ int error;
	471	+
	472	+ if (!np && !pdata) {
	473	+ dev_err(dev, "no platform data\n");
	474	+ return -ENODEV;
	475	+ }
	476	+
	477	+ if (irq <= 0) {
	478	+ dev_err(dev, "no irq\n");
	479	+ return -ENODEV;
	480	+ }
	481	+
	482	+ if (IS_ERR(regmap))
	483	+ return PTR_ERR(regmap);
	484	+
	485	+ if (!tsc200x_cmd) {
	486	+ dev_err(dev, "no cmd function\n");
	487	+ return -ENODEV;
	488	+ }
	489	+
	490	+ if (pdata) {
	491	+ fudge_x = pdata->ts_x_fudge;
	492	+ fudge_y = pdata->ts_y_fudge;
	493	+ fudge_p = pdata->ts_pressure_fudge;
	494	+ max_x = pdata->ts_x_max;
	495	+ max_y = pdata->ts_y_max;
	496	+ max_p = pdata->ts_pressure_max;
	497	+ x_plate_ohm = pdata->ts_x_plate_ohm;
	498	+ esd_timeout = pdata->esd_timeout_ms;
	499	+ } else {
	500	+ x_plate_ohm = TSC200X_DEF_RESISTOR;
	501	+ of_property_read_u32(np, "ti,x-plate-ohms", &x_plate_ohm);
	502	+ esd_timeout = 0;
	503	+ of_property_read_u32(np, "ti,esd-recovery-timeout-ms",
	504	+ &esd_timeout);
	505	+ }
	506	+
	507	+ ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL);
	508	+ if (!ts)
	509	+ return -ENOMEM;
	510	+
	511	+ input_dev = devm_input_allocate_device(dev);
	512	+ if (!input_dev)
	513	+ return -ENOMEM;
	514	+
	515	+ ts->irq = irq;
	516	+ ts->dev = dev;
	517	+ ts->idev = input_dev;
	518	+ ts->regmap = regmap;
	519	+ ts->tsc200x_cmd = tsc200x_cmd;
	520	+ ts->x_plate_ohm = x_plate_ohm;
	521	+ ts->esd_timeout = esd_timeout;
	522	+
	523	+ ts->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
	524	+ if (IS_ERR(ts->reset_gpio)) {
	525	+ error = PTR_ERR(ts->reset_gpio);
	526	+ dev_err(dev, "error acquiring reset gpio: %d\n", error);
	527	+ return error;
	528	+ }
	529	+
	530	+ ts->vio = devm_regulator_get_optional(dev, "vio");
	531	+ if (IS_ERR(ts->vio)) {
	532	+ error = PTR_ERR(ts->vio);
	533	+ dev_err(dev, "vio regulator missing (%d)", error);
	534	+ return error;
	535	+ }
	536	+
	537	+ if (!ts->reset_gpio && pdata)
	538	+ ts->set_reset = pdata->set_reset;
	539	+
	540	+ mutex_init(&ts->mutex);
	541	+
	542	+ spin_lock_init(&ts->lock);
	543	+ setup_timer(&ts->penup_timer, tsc200x_penup_timer, (unsigned long)ts);
	544	+
	545	+ INIT_DELAYED_WORK(&ts->esd_work, tsc200x_esd_work);
	546	+
	547	+ snprintf(ts->phys, sizeof(ts->phys),
	548	+ "%s/input-ts", dev_name(dev));
	549	+
	550	+ input_dev->name = "TSC200X touchscreen";
	551	+ input_dev->phys = ts->phys;
	552	+ input_dev->id.bustype = bustype;
	553	+ input_dev->dev.parent = dev;
	554	+ input_dev->evbit[0] = BIT(EV_ABS) \| BIT(EV_KEY);
	555	+ input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
	556	+
	557	+ input_set_abs_params(input_dev, ABS_X, 0, max_x, fudge_x, 0);
	558	+ input_set_abs_params(input_dev, ABS_Y, 0, max_y, fudge_y, 0);
	559	+ input_set_abs_params(input_dev, ABS_PRESSURE, 0, max_p, fudge_p, 0);
	560	+
	561	+ if (np)
	562	+ touchscreen_parse_properties(input_dev, false);
	563	+
	564	+ input_dev->open = tsc200x_open;
	565	+ input_dev->close = tsc200x_close;
	566	+
	567	+ input_set_drvdata(input_dev, ts);
	568	+
	569	+ /* Ensure the touchscreen is off */
	570	+ tsc200x_stop_scan(ts);
	571	+
	572	+ error = devm_request_threaded_irq(dev, irq, NULL,
	573	+ tsc200x_irq_thread,
	574	+ IRQF_TRIGGER_RISING \| IRQF_ONESHOT,
	575	+ "tsc200x", ts);
	576	+ if (error) {
	577	+ dev_err(dev, "Failed to request irq, err: %d\n", error);
	578	+ return error;
	579	+ }
	580	+
	581	+ /* enable regulator for DT */
	582	+ if (ts->vio) {
	583	+ error = regulator_enable(ts->vio);
	584	+ if (error)
	585	+ return error;
	586	+ }
	587	+
	588	+ dev_set_drvdata(dev, ts);
	589	+ error = sysfs_create_group(&dev->kobj, &tsc200x_attr_group);
	590	+ if (error) {
	591	+ dev_err(dev,
	592	+ "Failed to create sysfs attributes, err: %d\n", error);
	593	+ goto disable_regulator;
	594	+ }
	595	+
	596	+ error = input_register_device(ts->idev);
	597	+ if (error) {
	598	+ dev_err(dev,
	599	+ "Failed to register input device, err: %d\n", error);
	600	+ goto err_remove_sysfs;
	601	+ }
	602	+
	603	+ irq_set_irq_wake(irq, 1);
	604	+ return 0;
	605	+
	606	+err_remove_sysfs:
	607	+ sysfs_remove_group(&dev->kobj, &tsc200x_attr_group);
	608	+disable_regulator:
	609	+ if (ts->vio)
	610	+ regulator_disable(ts->vio);
	611	+ return error;
	612	+}
	613	+EXPORT_SYMBOL_GPL(tsc200x_probe);
	614	+
	615	+int tsc200x_remove(struct device *dev)
	616	+{
	617	+ struct tsc200x *ts = dev_get_drvdata(dev);
	618	+
	619	+ sysfs_remove_group(&dev->kobj, &tsc200x_attr_group);
	620	+
	621	+ if (ts->vio)
	622	+ regulator_disable(ts->vio);
	623	+
	624	+ return 0;
	625	+}
	626	+EXPORT_SYMBOL_GPL(tsc200x_remove);
	627	+
	628	+static int __maybe_unused tsc200x_suspend(struct device *dev)
	629	+{
	630	+ struct tsc200x *ts = dev_get_drvdata(dev);
	631	+
	632	+ mutex_lock(&ts->mutex);
	633	+
	634	+ if (!ts->suspended && ts->opened)
	635	+ __tsc200x_disable(ts);
	636	+
	637	+ ts->suspended = true;
	638	+
	639	+ mutex_unlock(&ts->mutex);
	640	+
	641	+ return 0;
	642	+}
	643	+
	644	+static int __maybe_unused tsc200x_resume(struct device *dev)
	645	+{
	646	+ struct tsc200x *ts = dev_get_drvdata(dev);
	647	+
	648	+ mutex_lock(&ts->mutex);
	649	+
	650	+ if (ts->suspended && ts->opened)
	651	+ __tsc200x_enable(ts);
	652	+
	653	+ ts->suspended = false;
	654	+
	655	+ mutex_unlock(&ts->mutex);
	656	+
	657	+ return 0;
	658	+}
	659	+
	660	+SIMPLE_DEV_PM_OPS(tsc200x_pm_ops, tsc200x_suspend, tsc200x_resume);
	661	+EXPORT_SYMBOL_GPL(tsc200x_pm_ops);
	662	+
	663	+MODULE_AUTHOR("Lauri Leukkunen <lauri.leukkunen@nokia.com>");
	664	+MODULE_DESCRIPTION("TSC200x Touchscreen Driver Core");
	665	+MODULE_LICENSE("GPL");

drivers/input/touchscreen/tsc200x-core.h+78−0

@@ -0,0 +1,78 @@
	1	+#ifndef _TSC200X_CORE_H
	2	+#define _TSC200X_CORE_H
	3	+
	4	+/* control byte 1 */
	5	+#define TSC200X_CMD 0x80
	6	+#define TSC200X_CMD_NORMAL 0x00
	7	+#define TSC200X_CMD_STOP 0x01
	8	+#define TSC200X_CMD_12BIT 0x04
	9	+
	10	+/* control byte 0 */
	11	+#define TSC200X_REG_READ 0x01 /* R/W access */
	12	+#define TSC200X_REG_PND0 0x02 /* Power Not Down Control */
	13	+#define TSC200X_REG_X (0x0 << 3)
	14	+#define TSC200X_REG_Y (0x1 << 3)
	15	+#define TSC200X_REG_Z1 (0x2 << 3)
	16	+#define TSC200X_REG_Z2 (0x3 << 3)
	17	+#define TSC200X_REG_AUX (0x4 << 3)
	18	+#define TSC200X_REG_TEMP1 (0x5 << 3)
	19	+#define TSC200X_REG_TEMP2 (0x6 << 3)
	20	+#define TSC200X_REG_STATUS (0x7 << 3)
	21	+#define TSC200X_REG_AUX_HIGH (0x8 << 3)
	22	+#define TSC200X_REG_AUX_LOW (0x9 << 3)
	23	+#define TSC200X_REG_TEMP_HIGH (0xA << 3)
	24	+#define TSC200X_REG_TEMP_LOW (0xB << 3)
	25	+#define TSC200X_REG_CFR0 (0xC << 3)
	26	+#define TSC200X_REG_CFR1 (0xD << 3)
	27	+#define TSC200X_REG_CFR2 (0xE << 3)
	28	+#define TSC200X_REG_CONV_FUNC (0xF << 3)
	29	+
	30	+/* configuration register 0 */
	31	+#define TSC200X_CFR0_PRECHARGE_276US 0x0040
	32	+#define TSC200X_CFR0_STABTIME_1MS 0x0300
	33	+#define TSC200X_CFR0_CLOCK_1MHZ 0x1000
	34	+#define TSC200X_CFR0_RESOLUTION12 0x2000
	35	+#define TSC200X_CFR0_PENMODE 0x8000
	36	+#define TSC200X_CFR0_INITVALUE (TSC200X_CFR0_STABTIME_1MS \| \
	37	+ TSC200X_CFR0_CLOCK_1MHZ \| \
	38	+ TSC200X_CFR0_RESOLUTION12 \| \
	39	+ TSC200X_CFR0_PRECHARGE_276US \| \
	40	+ TSC200X_CFR0_PENMODE)
	41	+
	42	+/* bits common to both read and write of configuration register 0 */
	43	+#define TSC200X_CFR0_RW_MASK 0x3fff
	44	+
	45	+/* configuration register 1 */
	46	+#define TSC200X_CFR1_BATCHDELAY_4MS 0x0003
	47	+#define TSC200X_CFR1_INITVALUE TSC200X_CFR1_BATCHDELAY_4MS
	48	+
	49	+/* configuration register 2 */
	50	+#define TSC200X_CFR2_MAVE_Z 0x0004
	51	+#define TSC200X_CFR2_MAVE_Y 0x0008
	52	+#define TSC200X_CFR2_MAVE_X 0x0010
	53	+#define TSC200X_CFR2_AVG_7 0x0800
	54	+#define TSC200X_CFR2_MEDIUM_15 0x3000
	55	+#define TSC200X_CFR2_INITVALUE (TSC200X_CFR2_MAVE_X \| \
	56	+ TSC200X_CFR2_MAVE_Y \| \
	57	+ TSC200X_CFR2_MAVE_Z \| \
	58	+ TSC200X_CFR2_MEDIUM_15 \| \
	59	+ TSC200X_CFR2_AVG_7)
	60	+
	61	+#define MAX_12BIT 0xfff
	62	+#define TSC200X_DEF_X_FUZZ 4
	63	+#define TSC200X_DEF_Y_FUZZ 8
	64	+#define TSC200X_DEF_P_FUZZ 2
	65	+#define TSC200X_DEF_RESISTOR 280
	66	+
	67	+#define TSC2005_SPI_MAX_SPEED_HZ 10000000
	68	+#define TSC200X_PENUP_TIME_MS 40
	69	+
	70	+extern const struct regmap_config tsc200x_regmap_config;
	71	+extern const struct dev_pm_ops tsc200x_pm_ops;
	72	+
	73	+int tsc200x_probe(struct device *dev, int irq, __u16 bustype,
	74	+ struct regmap *regmap,
	75	+ int (tsc200x_cmd)(struct device dev, u8 cmd));
	76	+int tsc200x_remove(struct device *dev);
	77	+
	78	+#endif