[PATCH v4 0/4] tsc2005 - Add support for tsc2004

[PATCH v4 0/4] tsc2005 - Add support for tsc2004

[Michael Welling]

Adds support for the i2c based tsc2004.

Due to the overlapping functionality of the tsc2004 and tsc2005
the common code was moved to a core driver (tsc200x-core).

v4: Break patch into series. Isolates the I2C and SPI commands to
respective drivers.
v3: Splits the tsc2004 and tsc2005 into separate drivers with
with common routines in tsc200x-core.
v2: Fixes Kconfig based on report for 0-day build bot.

Michael Welling (4):
  Input: tsc2005 - Seperate SPI and core functions
  Input: tsc200x-core - Rename functions and variables
  Input: tsc2004 - Add support for tsc2004
  Input: tsc2004 - Document ts2004 dt bindings

 .../bindings/input/touchscreen/tsc2005.txt         |  39 ++
 drivers/input/touchscreen/Kconfig                  |  17 +
 drivers/input/touchscreen/Makefile                 |   2 +
 drivers/input/touchscreen/tsc2004.c                |  86 +++
 drivers/input/touchscreen/tsc2005.c                | 711 +--------------------
 .../touchscreen/{tsc2005.c => tsc200x-core.c}      | 408 +++++-------
 drivers/input/touchscreen/tsc200x-core.h           |  78 +++
 7 files changed, 393 insertions(+), 948 deletions(-)
 create mode 100644 drivers/input/touchscreen/tsc2004.c
 copy drivers/input/touchscreen/{tsc2005.c => tsc200x-core.c} (51%)
 create mode 100644 drivers/input/touchscreen/tsc200x-core.h

-- 
2.1.4

[PATCH 1/4] Input: tsc2005 - Separate SPI and core functions

[Michael Welling]

This patch separates the SPI functionality from core functionality
that overlaps with the tsc2004.

Prepares kernel for new tsc2004 driver without much redundant code.

Signed-off-by: Michael Welling <mwelling@ieee.org>
---
 drivers/input/touchscreen/Kconfig                  |   4 +
 drivers/input/touchscreen/Makefile                 |   1 +
 drivers/input/touchscreen/tsc2005.c                | 709 +--------------------
 .../touchscreen/{tsc2005.c => tsc200x-core.c}      | 226 ++-----
 drivers/input/touchscreen/tsc200x-core.h           |  78 +++
 5 files changed, 162 insertions(+), 856 deletions(-)
 copy drivers/input/touchscreen/{tsc2005.c => tsc200x-core.c} (72%)
 create mode 100644 drivers/input/touchscreen/tsc200x-core.h

diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 80cc698..6a5878b 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -939,10 +939,14 @@ config TOUCHSCREEN_TSC_SERIO
 	  To compile this driver as a module, choose M here: the
 	  module will be called tsc40.
 
+config TOUCHSCREEN_TSC200X_CORE
+	tristate
+
 config TOUCHSCREEN_TSC2005
 	tristate "TSC2005 based touchscreens"
 	depends on SPI_MASTER
 	select REGMAP_SPI
+	select TOUCHSCREEN_TSC200X_CORE
 	help
 	  Say Y here if you have a TSC2005 based touchscreen.
 
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 17435c7..03179f2 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -69,6 +69,7 @@ obj-$(CONFIG_TOUCHSCREEN_TOUCHIT213)	+= touchit213.o
 obj-$(CONFIG_TOUCHSCREEN_TOUCHRIGHT)	+= touchright.o
 obj-$(CONFIG_TOUCHSCREEN_TOUCHWIN)	+= touchwin.o
 obj-$(CONFIG_TOUCHSCREEN_TSC_SERIO)	+= tsc40.o
+obj-$(CONFIG_TOUCHSCREEN_TSC200X_CORE)	+= tsc200x-core.o
 obj-$(CONFIG_TOUCHSCREEN_TSC2005)	+= tsc2005.o
 obj-$(CONFIG_TOUCHSCREEN_TSC2007)	+= tsc2007.o
 obj-$(CONFIG_TOUCHSCREEN_UCB1400)	+= ucb1400_ts.o
diff --git a/drivers/input/touchscreen/tsc2005.c b/drivers/input/touchscreen/tsc2005.c
index 0f65d02..fc879cf 100644
--- a/drivers/input/touchscreen/tsc2005.c
+++ b/drivers/input/touchscreen/tsc2005.c
@@ -2,9 +2,10 @@
  * TSC2005 touchscreen driver
  *
  * Copyright (C) 2006-2010 Nokia Corporation
+ * Copyright (C) 2015 QWERTY Embedded Design
+ * Copyright (C) 2015 EMAC Inc.
  *
- * Author: Lauri Leukkunen <lauri.leukkunen@nokia.com>
- * based on TSC2301 driver by Klaus K. Pedersen <klaus.k.pedersen@nokia.com>
+ * Based on original tsc2005.c by Lauri Leukkunen <lauri.leukkunen@nokia.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -15,192 +16,34 @@
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
  */
 
-#include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/input.h>
-#include <linux/input/touchscreen.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
 #include <linux/pm.h>
 #include <linux/of.h>
 #include <linux/spi/spi.h>
-#include <linux/spi/tsc2005.h>
-#include <linux/regulator/consumer.h>
 #include <linux/regmap.h>
-#include <linux/gpio/consumer.h>
-
-/*
- * The touchscreen interface operates as follows:
- *
- * 1) Pen is pressed against the touchscreen.
- * 2) TSC2005 performs AD conversion.
- * 3) After the conversion is done TSC2005 drives DAV line down.
- * 4) GPIO IRQ is received and tsc2005_irq_thread() is scheduled.
- * 5) tsc2005_irq_thread() queues up an spi transfer to fetch the x, y, z1, z2
- *    values.
- * 6) tsc2005_irq_thread() reports coordinates to input layer and sets up
- *    tsc2005_penup_timer() to be called after TSC2005_PENUP_TIME_MS (40ms).
- * 7) When the penup timer expires, there have not been touch or DAV interrupts
- *    during the last 40ms which means the pen has been lifted.
- *
- * ESD recovery via a hardware reset is done if the TSC2005 doesn't respond
- * after a configurable period (in ms) of activity. If esd_timeout is 0, the
- * watchdog is disabled.
- */
-
-/* control byte 1 */
-#define TSC2005_CMD			0x80
-#define TSC2005_CMD_NORMAL		0x00
-#define TSC2005_CMD_STOP		0x01
-#define TSC2005_CMD_12BIT		0x04
-
-/* control byte 0 */
-#define TSC2005_REG_READ		0x01 /* R/W access */
-#define TSC2005_REG_PND0		0x02 /* Power Not Down Control */
-#define TSC2005_REG_X			(0x0 << 3)
-#define TSC2005_REG_Y			(0x1 << 3)
-#define TSC2005_REG_Z1			(0x2 << 3)
-#define TSC2005_REG_Z2			(0x3 << 3)
-#define TSC2005_REG_AUX			(0x4 << 3)
-#define TSC2005_REG_TEMP1		(0x5 << 3)
-#define TSC2005_REG_TEMP2		(0x6 << 3)
-#define TSC2005_REG_STATUS		(0x7 << 3)
-#define TSC2005_REG_AUX_HIGH		(0x8 << 3)
-#define TSC2005_REG_AUX_LOW		(0x9 << 3)
-#define TSC2005_REG_TEMP_HIGH		(0xA << 3)
-#define TSC2005_REG_TEMP_LOW		(0xB << 3)
-#define TSC2005_REG_CFR0		(0xC << 3)
-#define TSC2005_REG_CFR1		(0xD << 3)
-#define TSC2005_REG_CFR2		(0xE << 3)
-#define TSC2005_REG_CONV_FUNC		(0xF << 3)
-
-/* configuration register 0 */
-#define TSC2005_CFR0_PRECHARGE_276US	0x0040
-#define TSC2005_CFR0_STABTIME_1MS	0x0300
-#define TSC2005_CFR0_CLOCK_1MHZ		0x1000
-#define TSC2005_CFR0_RESOLUTION12	0x2000
-#define TSC2005_CFR0_PENMODE		0x8000
-#define TSC2005_CFR0_INITVALUE		(TSC2005_CFR0_STABTIME_1MS    | \
-					 TSC2005_CFR0_CLOCK_1MHZ      | \
-					 TSC2005_CFR0_RESOLUTION12    | \
-					 TSC2005_CFR0_PRECHARGE_276US | \
-					 TSC2005_CFR0_PENMODE)
-
-/* bits common to both read and write of configuration register 0 */
-#define	TSC2005_CFR0_RW_MASK		0x3fff
-
-/* configuration register 1 */
-#define TSC2005_CFR1_BATCHDELAY_4MS	0x0003
-#define TSC2005_CFR1_INITVALUE		TSC2005_CFR1_BATCHDELAY_4MS
-
-/* configuration register 2 */
-#define TSC2005_CFR2_MAVE_Z		0x0004
-#define TSC2005_CFR2_MAVE_Y		0x0008
-#define TSC2005_CFR2_MAVE_X		0x0010
-#define TSC2005_CFR2_AVG_7		0x0800
-#define TSC2005_CFR2_MEDIUM_15		0x3000
-#define TSC2005_CFR2_INITVALUE		(TSC2005_CFR2_MAVE_X	| \
-					 TSC2005_CFR2_MAVE_Y	| \
-					 TSC2005_CFR2_MAVE_Z	| \
-					 TSC2005_CFR2_MEDIUM_15	| \
-					 TSC2005_CFR2_AVG_7)
-
-#define MAX_12BIT			0xfff
-#define TSC2005_DEF_X_FUZZ		4
-#define TSC2005_DEF_Y_FUZZ		8
-#define TSC2005_DEF_P_FUZZ		2
-#define TSC2005_DEF_RESISTOR		280
-
-#define TSC2005_SPI_MAX_SPEED_HZ	10000000
-#define TSC2005_PENUP_TIME_MS		40
-
-static const struct regmap_range tsc2005_writable_ranges[] = {
-	regmap_reg_range(TSC2005_REG_AUX_HIGH, TSC2005_REG_CFR2),
-};
-
-static const struct regmap_access_table tsc2005_writable_table = {
-	.yes_ranges = tsc2005_writable_ranges,
-	.n_yes_ranges = ARRAY_SIZE(tsc2005_writable_ranges),
-};
-
-static struct regmap_config tsc2005_regmap_config = {
-	.reg_bits = 8,
-	.val_bits = 16,
-	.reg_stride = 0x08,
-	.max_register = 0x78,
-	.read_flag_mask = TSC2005_REG_READ,
-	.write_flag_mask = TSC2005_REG_PND0,
-	.wr_table = &tsc2005_writable_table,
-	.use_single_rw = true,
-};
-
-struct tsc2005_data {
-	u16 x;
-	u16 y;
-	u16 z1;
-	u16 z2;
-} __packed;
-#define TSC2005_DATA_REGS 4
-
-struct tsc2005 {
-	struct spi_device	*spi;
-	struct regmap		*regmap;
-
-	struct input_dev	*idev;
-	char			phys[32];
-
-	struct mutex		mutex;
-
-	/* raw copy of previous x,y,z */
-	int			in_x;
-	int			in_y;
-	int                     in_z1;
-	int			in_z2;
-
-	spinlock_t		lock;
-	struct timer_list	penup_timer;
+#include "tsc200x-core.h"
 
-	unsigned int		esd_timeout;
-	struct delayed_work	esd_work;
-	unsigned long		last_valid_interrupt;
-
-	unsigned int		x_plate_ohm;
-
-	bool			opened;
-	bool			suspended;
-
-	bool			pen_down;
-
-	struct regulator	*vio;
-
-	struct gpio_desc	*reset_gpio;
-	void			(*set_reset)(bool enable);
-};
-
-static int tsc2005_cmd(struct tsc2005 *ts, u8 cmd)
+static int tsc2005_cmd(struct device *dev, u8 cmd)
 {
 	u8 tx = TSC2005_CMD | TSC2005_CMD_12BIT | cmd;
 	struct spi_transfer xfer = {
-		.tx_buf		= &tx,
-		.len		= 1,
-		.bits_per_word	= 8,
+		.tx_buf         = &tx,
+		.len            = 1,
+		.bits_per_word  = 8,
 	};
 	struct spi_message msg;
+	struct spi_device *spi = to_spi_device(dev);
 	int error;
 
 	spi_message_init(&msg);
 	spi_message_add_tail(&xfer, &msg);
 
-	error = spi_sync(ts->spi, &msg);
+	error = spi_sync(spi, &msg);
 	if (error) {
-		dev_err(&ts->spi->dev, "%s: failed, command: %x, error: %d\n",
+		dev_err(dev, "%s: failed, command: %x, spi error: %d\n",
 			__func__, cmd, error);
 		return error;
 	}
@@ -208,382 +51,10 @@ static int tsc2005_cmd(struct tsc2005 *ts, u8 cmd)
 	return 0;
 }
 
-static void tsc2005_update_pen_state(struct tsc2005 *ts,
-				     int x, int y, int pressure)
-{
-	if (pressure) {
-		input_report_abs(ts->idev, ABS_X, x);
-		input_report_abs(ts->idev, ABS_Y, y);
-		input_report_abs(ts->idev, ABS_PRESSURE, pressure);
-		if (!ts->pen_down) {
-			input_report_key(ts->idev, BTN_TOUCH, !!pressure);
-			ts->pen_down = true;
-		}
-	} else {
-		input_report_abs(ts->idev, ABS_PRESSURE, 0);
-		if (ts->pen_down) {
-			input_report_key(ts->idev, BTN_TOUCH, 0);
-			ts->pen_down = false;
-		}
-	}
-	input_sync(ts->idev);
-	dev_dbg(&ts->spi->dev, "point(%4d,%4d), pressure (%4d)\n", x, y,
-		pressure);
-}
-
-static irqreturn_t tsc2005_irq_thread(int irq, void *_ts)
-{
-	struct tsc2005 *ts = _ts;
-	unsigned long flags;
-	unsigned int pressure;
-	struct tsc2005_data tsdata;
-	int error;
-
-	/* read the coordinates */
-	error = regmap_bulk_read(ts->regmap, TSC2005_REG_X, &tsdata,
-				 TSC2005_DATA_REGS);
-	if (unlikely(error))
-		goto out;
-
-	/* validate position */
-	if (unlikely(tsdata.x > MAX_12BIT || tsdata.y > MAX_12BIT))
-		goto out;
-
-	/* Skip reading if the pressure components are out of range */
-	if (unlikely(tsdata.z1 == 0 || tsdata.z2 > MAX_12BIT))
-		goto out;
-	if (unlikely(tsdata.z1 >= tsdata.z2))
-		goto out;
-
-       /*
-	* Skip point if this is a pen down with the exact same values as
-	* the value before pen-up - that implies SPI fed us stale data
-	*/
-	if (!ts->pen_down &&
-	    ts->in_x == tsdata.x && ts->in_y == tsdata.y &&
-	    ts->in_z1 == tsdata.z1 && ts->in_z2 == tsdata.z2) {
-		goto out;
-	}
-
-	/*
-	 * At this point we are happy we have a valid and useful reading.
-	 * Remember it for later comparisons. We may now begin downsampling.
-	 */
-	ts->in_x = tsdata.x;
-	ts->in_y = tsdata.y;
-	ts->in_z1 = tsdata.z1;
-	ts->in_z2 = tsdata.z2;
-
-	/* Compute touch pressure resistance using equation #1 */
-	pressure = tsdata.x * (tsdata.z2 - tsdata.z1) / tsdata.z1;
-	pressure = pressure * ts->x_plate_ohm / 4096;
-	if (unlikely(pressure > MAX_12BIT))
-		goto out;
-
-	spin_lock_irqsave(&ts->lock, flags);
-
-	tsc2005_update_pen_state(ts, tsdata.x, tsdata.y, pressure);
-	mod_timer(&ts->penup_timer,
-		  jiffies + msecs_to_jiffies(TSC2005_PENUP_TIME_MS));
-
-	spin_unlock_irqrestore(&ts->lock, flags);
-
-	ts->last_valid_interrupt = jiffies;
-out:
-	return IRQ_HANDLED;
-}
-
-static void tsc2005_penup_timer(unsigned long data)
-{
-	struct tsc2005 *ts = (struct tsc2005 *)data;
-	unsigned long flags;
-
-	spin_lock_irqsave(&ts->lock, flags);
-	tsc2005_update_pen_state(ts, 0, 0, 0);
-	spin_unlock_irqrestore(&ts->lock, flags);
-}
-
-static void tsc2005_start_scan(struct tsc2005 *ts)
-{
-	regmap_write(ts->regmap, TSC2005_REG_CFR0, TSC2005_CFR0_INITVALUE);
-	regmap_write(ts->regmap, TSC2005_REG_CFR1, TSC2005_CFR1_INITVALUE);
-	regmap_write(ts->regmap, TSC2005_REG_CFR2, TSC2005_CFR2_INITVALUE);
-	tsc2005_cmd(ts, TSC2005_CMD_NORMAL);
-}
-
-static void tsc2005_stop_scan(struct tsc2005 *ts)
-{
-	tsc2005_cmd(ts, TSC2005_CMD_STOP);
-}
-
-static void tsc2005_set_reset(struct tsc2005 *ts, bool enable)
-{
-	if (ts->reset_gpio)
-		gpiod_set_value_cansleep(ts->reset_gpio, enable);
-	else if (ts->set_reset)
-		ts->set_reset(enable);
-}
-
-/* must be called with ts->mutex held */
-static void __tsc2005_disable(struct tsc2005 *ts)
-{
-	tsc2005_stop_scan(ts);
-
-	disable_irq(ts->spi->irq);
-	del_timer_sync(&ts->penup_timer);
-
-	cancel_delayed_work_sync(&ts->esd_work);
-
-	enable_irq(ts->spi->irq);
-}
-
-/* must be called with ts->mutex held */
-static void __tsc2005_enable(struct tsc2005 *ts)
-{
-	tsc2005_start_scan(ts);
-
-	if (ts->esd_timeout && (ts->set_reset || ts->reset_gpio)) {
-		ts->last_valid_interrupt = jiffies;
-		schedule_delayed_work(&ts->esd_work,
-				round_jiffies_relative(
-					msecs_to_jiffies(ts->esd_timeout)));
-	}
-
-}
-
-static ssize_t tsc2005_selftest_show(struct device *dev,
-				     struct device_attribute *attr,
-				     char *buf)
-{
-	struct tsc2005 *ts = dev_get_drvdata(dev);
-	unsigned int temp_high;
-	unsigned int temp_high_orig;
-	unsigned int temp_high_test;
-	bool success = true;
-	int error;
-
-	mutex_lock(&ts->mutex);
-
-	/*
-	 * Test TSC2005 communications via temp high register.
-	 */
-	__tsc2005_disable(ts);
-
-	error = regmap_read(ts->regmap, TSC2005_REG_TEMP_HIGH, &temp_high_orig);
-	if (error) {
-		dev_warn(dev, "selftest failed: read error %d\n", error);
-		success = false;
-		goto out;
-	}
-
-	temp_high_test = (temp_high_orig - 1) & MAX_12BIT;
-
-	error = regmap_write(ts->regmap, TSC2005_REG_TEMP_HIGH, temp_high_test);
-	if (error) {
-		dev_warn(dev, "selftest failed: write error %d\n", error);
-		success = false;
-		goto out;
-	}
-
-	error = regmap_read(ts->regmap, TSC2005_REG_TEMP_HIGH, &temp_high);
-	if (error) {
-		dev_warn(dev, "selftest failed: read error %d after write\n",
-			 error);
-		success = false;
-		goto out;
-	}
-
-	if (temp_high != temp_high_test) {
-		dev_warn(dev, "selftest failed: %d != %d\n",
-			 temp_high, temp_high_test);
-		success = false;
-	}
-
-	/* hardware reset */
-	tsc2005_set_reset(ts, false);
-	usleep_range(100, 500); /* only 10us required */
-	tsc2005_set_reset(ts, true);
-
-	if (!success)
-		goto out;
-
-	/* test that the reset really happened */
-	error = regmap_read(ts->regmap, TSC2005_REG_TEMP_HIGH, &temp_high);
-	if (error) {
-		dev_warn(dev, "selftest failed: read error %d after reset\n",
-			 error);
-		success = false;
-		goto out;
-	}
-
-	if (temp_high != temp_high_orig) {
-		dev_warn(dev, "selftest failed after reset: %d != %d\n",
-			 temp_high, temp_high_orig);
-		success = false;
-	}
-
-out:
-	__tsc2005_enable(ts);
-	mutex_unlock(&ts->mutex);
-
-	return sprintf(buf, "%d\n", success);
-}
-
-static DEVICE_ATTR(selftest, S_IRUGO, tsc2005_selftest_show, NULL);
-
-static struct attribute *tsc2005_attrs[] = {
-	&dev_attr_selftest.attr,
-	NULL
-};
-
-static umode_t tsc2005_attr_is_visible(struct kobject *kobj,
-				      struct attribute *attr, int n)
-{
-	struct device *dev = container_of(kobj, struct device, kobj);
-	struct tsc2005 *ts = dev_get_drvdata(dev);
-	umode_t mode = attr->mode;
-
-	if (attr == &dev_attr_selftest.attr) {
-		if (!ts->set_reset && !ts->reset_gpio)
-			mode = 0;
-	}
-
-	return mode;
-}
-
-static const struct attribute_group tsc2005_attr_group = {
-	.is_visible	= tsc2005_attr_is_visible,
-	.attrs		= tsc2005_attrs,
-};
-
-static void tsc2005_esd_work(struct work_struct *work)
-{
-	struct tsc2005 *ts = container_of(work, struct tsc2005, esd_work.work);
-	int error;
-	unsigned int r;
-
-	if (!mutex_trylock(&ts->mutex)) {
-		/*
-		 * If the mutex is taken, it means that disable or enable is in
-		 * progress. In that case just reschedule the work. If the work
-		 * is not needed, it will be canceled by disable.
-		 */
-		goto reschedule;
-	}
-
-	if (time_is_after_jiffies(ts->last_valid_interrupt +
-				  msecs_to_jiffies(ts->esd_timeout)))
-		goto out;
-
-	/* We should be able to read register without disabling interrupts. */
-	error = regmap_read(ts->regmap, TSC2005_REG_CFR0, &r);
-	if (!error &&
-	    !((r ^ TSC2005_CFR0_INITVALUE) & TSC2005_CFR0_RW_MASK)) {
-		goto out;
-	}
-
-	/*
-	 * If we could not read our known value from configuration register 0
-	 * then we should reset the controller as if from power-up and start
-	 * scanning again.
-	 */
-	dev_info(&ts->spi->dev, "TSC2005 not responding - resetting\n");
-
-	disable_irq(ts->spi->irq);
-	del_timer_sync(&ts->penup_timer);
-
-	tsc2005_update_pen_state(ts, 0, 0, 0);
-
-	tsc2005_set_reset(ts, false);
-	usleep_range(100, 500); /* only 10us required */
-	tsc2005_set_reset(ts, true);
-
-	enable_irq(ts->spi->irq);
-	tsc2005_start_scan(ts);
-
-out:
-	mutex_unlock(&ts->mutex);
-reschedule:
-	/* re-arm the watchdog */
-	schedule_delayed_work(&ts->esd_work,
-			      round_jiffies_relative(
-					msecs_to_jiffies(ts->esd_timeout)));
-}
-
-static int tsc2005_open(struct input_dev *input)
-{
-	struct tsc2005 *ts = input_get_drvdata(input);
-
-	mutex_lock(&ts->mutex);
-
-	if (!ts->suspended)
-		__tsc2005_enable(ts);
-
-	ts->opened = true;
-
-	mutex_unlock(&ts->mutex);
-
-	return 0;
-}
-
-static void tsc2005_close(struct input_dev *input)
-{
-	struct tsc2005 *ts = input_get_drvdata(input);
-
-	mutex_lock(&ts->mutex);
-
-	if (!ts->suspended)
-		__tsc2005_disable(ts);
-
-	ts->opened = false;
-
-	mutex_unlock(&ts->mutex);
-}
-
 static int tsc2005_probe(struct spi_device *spi)
 {
-	const struct tsc2005_platform_data *pdata = dev_get_platdata(&spi->dev);
-	struct device_node *np = spi->dev.of_node;
-
-	struct tsc2005 *ts;
-	struct input_dev *input_dev;
-	unsigned int max_x = MAX_12BIT;
-	unsigned int max_y = MAX_12BIT;
-	unsigned int max_p = MAX_12BIT;
-	unsigned int fudge_x = TSC2005_DEF_X_FUZZ;
-	unsigned int fudge_y = TSC2005_DEF_Y_FUZZ;
-	unsigned int fudge_p = TSC2005_DEF_P_FUZZ;
-	unsigned int x_plate_ohm = TSC2005_DEF_RESISTOR;
-	unsigned int esd_timeout;
 	int error;
 
-	if (!np && !pdata) {
-		dev_err(&spi->dev, "no platform data\n");
-		return -ENODEV;
-	}
-
-	if (spi->irq <= 0) {
-		dev_err(&spi->dev, "no irq\n");
-		return -ENODEV;
-	}
-
-	if (pdata) {
-		fudge_x	= pdata->ts_x_fudge;
-		fudge_y	= pdata->ts_y_fudge;
-		fudge_p	= pdata->ts_pressure_fudge;
-		max_x	= pdata->ts_x_max;
-		max_y	= pdata->ts_y_max;
-		max_p	= pdata->ts_pressure_max;
-		x_plate_ohm = pdata->ts_x_plate_ohm;
-		esd_timeout = pdata->esd_timeout_ms;
-	} else {
-		x_plate_ohm = TSC2005_DEF_RESISTOR;
-		of_property_read_u32(np, "ti,x-plate-ohms", &x_plate_ohm);
-		esd_timeout = 0;
-		of_property_read_u32(np, "ti,esd-recovery-timeout-ms",
-								&esd_timeout);
-	}
-
 	spi->mode = SPI_MODE_0;
 	spi->bits_per_word = 8;
 	if (!spi->max_speed_hz)
@@ -593,167 +64,21 @@ static int tsc2005_probe(struct spi_device *spi)
 	if (error)
 		return error;
 
-	ts = devm_kzalloc(&spi->dev, sizeof(*ts), GFP_KERNEL);
-	if (!ts)
-		return -ENOMEM;
-
-	input_dev = devm_input_allocate_device(&spi->dev);
-	if (!input_dev)
-		return -ENOMEM;
-
-	ts->spi = spi;
-	ts->idev = input_dev;
-
-	ts->regmap = devm_regmap_init_spi(spi, &tsc2005_regmap_config);
-	if (IS_ERR(ts->regmap))
-		return PTR_ERR(ts->regmap);
-
-	ts->x_plate_ohm = x_plate_ohm;
-	ts->esd_timeout = esd_timeout;
-
-	ts->reset_gpio = devm_gpiod_get_optional(&spi->dev, "reset",
-						 GPIOD_OUT_HIGH);
-	if (IS_ERR(ts->reset_gpio)) {
-		error = PTR_ERR(ts->reset_gpio);
-		dev_err(&spi->dev, "error acquiring reset gpio: %d\n", error);
-		return error;
-	}
-
-	ts->vio = devm_regulator_get_optional(&spi->dev, "vio");
-	if (IS_ERR(ts->vio)) {
-		error = PTR_ERR(ts->vio);
-		dev_err(&spi->dev, "vio regulator missing (%d)", error);
-		return error;
-	}
-
-	if (!ts->reset_gpio && pdata)
-		ts->set_reset = pdata->set_reset;
-
-	mutex_init(&ts->mutex);
-
-	spin_lock_init(&ts->lock);
-	setup_timer(&ts->penup_timer, tsc2005_penup_timer, (unsigned long)ts);
-
-	INIT_DELAYED_WORK(&ts->esd_work, tsc2005_esd_work);
-
-	snprintf(ts->phys, sizeof(ts->phys),
-		 "%s/input-ts", dev_name(&spi->dev));
-
-	input_dev->name = "TSC2005 touchscreen";
-	input_dev->phys = ts->phys;
-	input_dev->id.bustype = BUS_SPI;
-	input_dev->dev.parent = &spi->dev;
-	input_dev->evbit[0] = BIT(EV_ABS) | BIT(EV_KEY);
-	input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
-
-	input_set_abs_params(input_dev, ABS_X, 0, max_x, fudge_x, 0);
-	input_set_abs_params(input_dev, ABS_Y, 0, max_y, fudge_y, 0);
-	input_set_abs_params(input_dev, ABS_PRESSURE, 0, max_p, fudge_p, 0);
-
-	if (np)
-		touchscreen_parse_properties(input_dev, false);
-
-	input_dev->open = tsc2005_open;
-	input_dev->close = tsc2005_close;
-
-	input_set_drvdata(input_dev, ts);
-
-	/* Ensure the touchscreen is off */
-	tsc2005_stop_scan(ts);
-
-	error = devm_request_threaded_irq(&spi->dev, spi->irq, NULL,
-					  tsc2005_irq_thread,
-					  IRQF_TRIGGER_RISING | IRQF_ONESHOT,
-					  "tsc2005", ts);
-	if (error) {
-		dev_err(&spi->dev, "Failed to request irq, err: %d\n", error);
-		return error;
-	}
-
-	/* enable regulator for DT */
-	if (ts->vio) {
-		error = regulator_enable(ts->vio);
-		if (error)
-			return error;
-	}
-
-	dev_set_drvdata(&spi->dev, ts);
-	error = sysfs_create_group(&spi->dev.kobj, &tsc2005_attr_group);
-	if (error) {
-		dev_err(&spi->dev,
-			"Failed to create sysfs attributes, err: %d\n", error);
-		goto disable_regulator;
-	}
-
-	error = input_register_device(ts->idev);
-	if (error) {
-		dev_err(&spi->dev,
-			"Failed to register input device, err: %d\n", error);
-		goto err_remove_sysfs;
-	}
-
-	irq_set_irq_wake(spi->irq, 1);
-	return 0;
-
-err_remove_sysfs:
-	sysfs_remove_group(&spi->dev.kobj, &tsc2005_attr_group);
-disable_regulator:
-	if (ts->vio)
-		regulator_disable(ts->vio);
-	return error;
+	return tsc200x_probe(&spi->dev, spi->irq, BUS_SPI,
+			     devm_regmap_init_spi(spi, &tsc200x_regmap_config),
+			     &tsc2005_cmd);
 }
 
 static int tsc2005_remove(struct spi_device *spi)
 {
-	struct tsc2005 *ts = dev_get_drvdata(&spi->dev);
-
-	sysfs_remove_group(&spi->dev.kobj, &tsc2005_attr_group);
-
-	if (ts->vio)
-		regulator_disable(ts->vio);
-
-	return 0;
-}
-
-static int __maybe_unused tsc2005_suspend(struct device *dev)
-{
-	struct tsc2005 *ts = dev_get_drvdata(dev);
-
-	mutex_lock(&ts->mutex);
-
-	if (!ts->suspended && ts->opened)
-		__tsc2005_disable(ts);
-
-	ts->suspended = true;
-
-	mutex_unlock(&ts->mutex);
-
-	return 0;
-}
-
-static int __maybe_unused tsc2005_resume(struct device *dev)
-{
-	struct tsc2005 *ts = dev_get_drvdata(dev);
-
-	mutex_lock(&ts->mutex);
-
-	if (ts->suspended && ts->opened)
-		__tsc2005_enable(ts);
-
-	ts->suspended = false;
-
-	mutex_unlock(&ts->mutex);
-
-	return 0;
+	return tsc200x_remove(&spi->dev);
 }
 
-static SIMPLE_DEV_PM_OPS(tsc2005_pm_ops, tsc2005_suspend, tsc2005_resume);
-
 static struct spi_driver tsc2005_driver = {
 	.driver	= {
 		.name	= "tsc2005",
 		.owner	= THIS_MODULE,
-		.pm	= &tsc2005_pm_ops,
+		.pm	= &tsc200x_pm_ops,
 	},
 	.probe	= tsc2005_probe,
 	.remove	= tsc2005_remove,
@@ -761,7 +86,7 @@ static struct spi_driver tsc2005_driver = {
 
 module_spi_driver(tsc2005_driver);
 
-MODULE_AUTHOR("Lauri Leukkunen <lauri.leukkunen@nokia.com>");
+MODULE_AUTHOR("Michael Welling <mwelling@ieee.org>");
 MODULE_DESCRIPTION("TSC2005 Touchscreen Driver");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("spi:tsc2005");
diff --git a/drivers/input/touchscreen/tsc2005.c b/drivers/input/touchscreen/tsc200x-core.c
similarity index 72%
copy from drivers/input/touchscreen/tsc2005.c
copy to drivers/input/touchscreen/tsc200x-core.c
index 0f65d02..528ad39 100644
--- a/drivers/input/touchscreen/tsc2005.c
+++ b/drivers/input/touchscreen/tsc200x-core.c
@@ -1,7 +1,9 @@
 /*
- * TSC2005 touchscreen driver
+ * TSC2004/TSC2005 touchscreen driver core
  *
  * Copyright (C) 2006-2010 Nokia Corporation
+ * Copyright (C) 2015 QWERTY Embedded Design
+ * Copyright (C) 2015 EMAC Inc.
  *
  * Author: Lauri Leukkunen <lauri.leukkunen@nokia.com>
  * based on TSC2301 driver by Klaus K. Pedersen <klaus.k.pedersen@nokia.com>
@@ -15,11 +17,6 @@
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
  */
 
 #include <linux/kernel.h>
@@ -30,11 +27,11 @@
 #include <linux/delay.h>
 #include <linux/pm.h>
 #include <linux/of.h>
-#include <linux/spi/spi.h>
 #include <linux/spi/tsc2005.h>
 #include <linux/regulator/consumer.h>
 #include <linux/regmap.h>
 #include <linux/gpio/consumer.h>
+#include "tsc200x-core.h"
 
 /*
  * The touchscreen interface operates as follows:
@@ -43,7 +40,7 @@
  * 2) TSC2005 performs AD conversion.
  * 3) After the conversion is done TSC2005 drives DAV line down.
  * 4) GPIO IRQ is received and tsc2005_irq_thread() is scheduled.
- * 5) tsc2005_irq_thread() queues up an spi transfer to fetch the x, y, z1, z2
+ * 5) tsc2005_irq_thread() queues up a transfer to fetch the x, y, z1, z2
  *    values.
  * 6) tsc2005_irq_thread() reports coordinates to input layer and sets up
  *    tsc2005_penup_timer() to be called after TSC2005_PENUP_TIME_MS (40ms).
@@ -55,72 +52,6 @@
  * watchdog is disabled.
  */
 
-/* control byte 1 */
-#define TSC2005_CMD			0x80
-#define TSC2005_CMD_NORMAL		0x00
-#define TSC2005_CMD_STOP		0x01
-#define TSC2005_CMD_12BIT		0x04
-
-/* control byte 0 */
-#define TSC2005_REG_READ		0x01 /* R/W access */
-#define TSC2005_REG_PND0		0x02 /* Power Not Down Control */
-#define TSC2005_REG_X			(0x0 << 3)
-#define TSC2005_REG_Y			(0x1 << 3)
-#define TSC2005_REG_Z1			(0x2 << 3)
-#define TSC2005_REG_Z2			(0x3 << 3)
-#define TSC2005_REG_AUX			(0x4 << 3)
-#define TSC2005_REG_TEMP1		(0x5 << 3)
-#define TSC2005_REG_TEMP2		(0x6 << 3)
-#define TSC2005_REG_STATUS		(0x7 << 3)
-#define TSC2005_REG_AUX_HIGH		(0x8 << 3)
-#define TSC2005_REG_AUX_LOW		(0x9 << 3)
-#define TSC2005_REG_TEMP_HIGH		(0xA << 3)
-#define TSC2005_REG_TEMP_LOW		(0xB << 3)
-#define TSC2005_REG_CFR0		(0xC << 3)
-#define TSC2005_REG_CFR1		(0xD << 3)
-#define TSC2005_REG_CFR2		(0xE << 3)
-#define TSC2005_REG_CONV_FUNC		(0xF << 3)
-
-/* configuration register 0 */
-#define TSC2005_CFR0_PRECHARGE_276US	0x0040
-#define TSC2005_CFR0_STABTIME_1MS	0x0300
-#define TSC2005_CFR0_CLOCK_1MHZ		0x1000
-#define TSC2005_CFR0_RESOLUTION12	0x2000
-#define TSC2005_CFR0_PENMODE		0x8000
-#define TSC2005_CFR0_INITVALUE		(TSC2005_CFR0_STABTIME_1MS    | \
-					 TSC2005_CFR0_CLOCK_1MHZ      | \
-					 TSC2005_CFR0_RESOLUTION12    | \
-					 TSC2005_CFR0_PRECHARGE_276US | \
-					 TSC2005_CFR0_PENMODE)
-
-/* bits common to both read and write of configuration register 0 */
-#define	TSC2005_CFR0_RW_MASK		0x3fff
-
-/* configuration register 1 */
-#define TSC2005_CFR1_BATCHDELAY_4MS	0x0003
-#define TSC2005_CFR1_INITVALUE		TSC2005_CFR1_BATCHDELAY_4MS
-
-/* configuration register 2 */
-#define TSC2005_CFR2_MAVE_Z		0x0004
-#define TSC2005_CFR2_MAVE_Y		0x0008
-#define TSC2005_CFR2_MAVE_X		0x0010
-#define TSC2005_CFR2_AVG_7		0x0800
-#define TSC2005_CFR2_MEDIUM_15		0x3000
-#define TSC2005_CFR2_INITVALUE		(TSC2005_CFR2_MAVE_X	| \
-					 TSC2005_CFR2_MAVE_Y	| \
-					 TSC2005_CFR2_MAVE_Z	| \
-					 TSC2005_CFR2_MEDIUM_15	| \
-					 TSC2005_CFR2_AVG_7)
-
-#define MAX_12BIT			0xfff
-#define TSC2005_DEF_X_FUZZ		4
-#define TSC2005_DEF_Y_FUZZ		8
-#define TSC2005_DEF_P_FUZZ		2
-#define TSC2005_DEF_RESISTOR		280
-
-#define TSC2005_SPI_MAX_SPEED_HZ	10000000
-#define TSC2005_PENUP_TIME_MS		40
-
 static const struct regmap_range tsc2005_writable_ranges[] = {
 	regmap_reg_range(TSC2005_REG_AUX_HIGH, TSC2005_REG_CFR2),
 };
@@ -130,7 +61,7 @@ static const struct regmap_access_table tsc2005_writable_table = {
 	.n_yes_ranges = ARRAY_SIZE(tsc2005_writable_ranges),
 };
 
-static struct regmap_config tsc2005_regmap_config = {
+const struct regmap_config tsc200x_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 16,
 	.reg_stride = 0x08,
@@ -150,8 +81,9 @@ struct tsc2005_data {
 #define TSC2005_DATA_REGS 4
 
 struct tsc2005 {
-	struct spi_device	*spi;
+	struct device           *dev;
 	struct regmap		*regmap;
+	__u16                   bustype;
 
 	struct input_dev	*idev;
 	char			phys[32];
@@ -182,32 +114,10 @@ struct tsc2005 {
 
 	struct gpio_desc	*reset_gpio;
 	void			(*set_reset)(bool enable);
+	int			(*tsc200x_cmd)(struct device *dev, u8 cmd);
+	int			irq;
 };
 
-static int tsc2005_cmd(struct tsc2005 *ts, u8 cmd)
-{
-	u8 tx = TSC2005_CMD | TSC2005_CMD_12BIT | cmd;
-	struct spi_transfer xfer = {
-		.tx_buf		= &tx,
-		.len		= 1,
-		.bits_per_word	= 8,
-	};
-	struct spi_message msg;
-	int error;
-
-	spi_message_init(&msg);
-	spi_message_add_tail(&xfer, &msg);
-
-	error = spi_sync(ts->spi, &msg);
-	if (error) {
-		dev_err(&ts->spi->dev, "%s: failed, command: %x, error: %d\n",
-			__func__, cmd, error);
-		return error;
-	}
-
-	return 0;
-}
-
 static void tsc2005_update_pen_state(struct tsc2005 *ts,
 				     int x, int y, int pressure)
 {
@@ -227,7 +137,7 @@ static void tsc2005_update_pen_state(struct tsc2005 *ts,
 		}
 	}
 	input_sync(ts->idev);
-	dev_dbg(&ts->spi->dev, "point(%4d,%4d), pressure (%4d)\n", x, y,
+	dev_dbg(ts->dev, "point(%4d,%4d), pressure (%4d)\n", x, y,
 		pressure);
 }
 
@@ -308,12 +218,12 @@ static void tsc2005_start_scan(struct tsc2005 *ts)
 	regmap_write(ts->regmap, TSC2005_REG_CFR0, TSC2005_CFR0_INITVALUE);
 	regmap_write(ts->regmap, TSC2005_REG_CFR1, TSC2005_CFR1_INITVALUE);
 	regmap_write(ts->regmap, TSC2005_REG_CFR2, TSC2005_CFR2_INITVALUE);
-	tsc2005_cmd(ts, TSC2005_CMD_NORMAL);
+	ts->tsc200x_cmd(ts->dev, TSC2005_CMD_NORMAL);
 }
 
 static void tsc2005_stop_scan(struct tsc2005 *ts)
 {
-	tsc2005_cmd(ts, TSC2005_CMD_STOP);
+	ts->tsc200x_cmd(ts->dev, TSC2005_CMD_STOP);
 }
 
 static void tsc2005_set_reset(struct tsc2005 *ts, bool enable)
@@ -329,12 +239,12 @@ static void __tsc2005_disable(struct tsc2005 *ts)
 {
 	tsc2005_stop_scan(ts);
 
-	disable_irq(ts->spi->irq);
+	disable_irq(ts->irq);
 	del_timer_sync(&ts->penup_timer);
 
 	cancel_delayed_work_sync(&ts->esd_work);
 
-	enable_irq(ts->spi->irq);
+	enable_irq(ts->irq);
 }
 
 /* must be called with ts->mutex held */
@@ -487,9 +397,9 @@ static void tsc2005_esd_work(struct work_struct *work)
 	 * then we should reset the controller as if from power-up and start
 	 * scanning again.
 	 */
-	dev_info(&ts->spi->dev, "TSC2005 not responding - resetting\n");
+	dev_info(ts->dev, "TSC2005 not responding - resetting\n");
 
-	disable_irq(ts->spi->irq);
+	disable_irq(ts->irq);
 	del_timer_sync(&ts->penup_timer);
 
 	tsc2005_update_pen_state(ts, 0, 0, 0);
@@ -498,7 +408,7 @@ static void tsc2005_esd_work(struct work_struct *work)
 	usleep_range(100, 500); /* only 10us required */
 	tsc2005_set_reset(ts, true);
 
-	enable_irq(ts->spi->irq);
+	enable_irq(ts->irq);
 	tsc2005_start_scan(ts);
 
 out:
@@ -540,10 +450,12 @@ static void tsc2005_close(struct input_dev *input)
 	mutex_unlock(&ts->mutex);
 }
 
-static int tsc2005_probe(struct spi_device *spi)
+int tsc200x_probe(struct device *dev, int irq, __u16 bustype,
+		  struct regmap *regmap,
+		  int (*tsc200x_cmd)(struct device *dev, u8 cmd))
 {
-	const struct tsc2005_platform_data *pdata = dev_get_platdata(&spi->dev);
-	struct device_node *np = spi->dev.of_node;
+	const struct tsc2005_platform_data *pdata = dev_get_platdata(dev);
+	struct device_node *np = dev->of_node;
 
 	struct tsc2005 *ts;
 	struct input_dev *input_dev;
@@ -558,12 +470,20 @@ static int tsc2005_probe(struct spi_device *spi)
 	int error;
 
 	if (!np && !pdata) {
-		dev_err(&spi->dev, "no platform data\n");
+		dev_err(dev, "no platform data\n");
 		return -ENODEV;
 	}
 
-	if (spi->irq <= 0) {
-		dev_err(&spi->dev, "no irq\n");
+	if (irq <= 0) {
+		dev_err(dev, "no irq\n");
+		return -ENODEV;
+	}
+
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
+
+	if (!tsc200x_cmd) {
+		dev_err(dev, "no cmd function\n");
 		return -ENODEV;
 	}
 
@@ -584,45 +504,33 @@ static int tsc2005_probe(struct spi_device *spi)
 								&esd_timeout);
 	}
 
-	spi->mode = SPI_MODE_0;
-	spi->bits_per_word = 8;
-	if (!spi->max_speed_hz)
-		spi->max_speed_hz = TSC2005_SPI_MAX_SPEED_HZ;
-
-	error = spi_setup(spi);
-	if (error)
-		return error;
-
-	ts = devm_kzalloc(&spi->dev, sizeof(*ts), GFP_KERNEL);
+	ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL);
 	if (!ts)
 		return -ENOMEM;
 
-	input_dev = devm_input_allocate_device(&spi->dev);
+	input_dev = devm_input_allocate_device(dev);
 	if (!input_dev)
 		return -ENOMEM;
 
-	ts->spi = spi;
+	ts->irq = irq;
+	ts->dev = dev;
 	ts->idev = input_dev;
-
-	ts->regmap = devm_regmap_init_spi(spi, &tsc2005_regmap_config);
-	if (IS_ERR(ts->regmap))
-		return PTR_ERR(ts->regmap);
-
+	ts->regmap = regmap;
+	ts->tsc200x_cmd = tsc200x_cmd;
 	ts->x_plate_ohm = x_plate_ohm;
 	ts->esd_timeout = esd_timeout;
 
-	ts->reset_gpio = devm_gpiod_get_optional(&spi->dev, "reset",
-						 GPIOD_OUT_HIGH);
+	ts->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
 	if (IS_ERR(ts->reset_gpio)) {
 		error = PTR_ERR(ts->reset_gpio);
-		dev_err(&spi->dev, "error acquiring reset gpio: %d\n", error);
+		dev_err(dev, "error acquiring reset gpio: %d\n", error);
 		return error;
 	}
 
-	ts->vio = devm_regulator_get_optional(&spi->dev, "vio");
+	ts->vio = devm_regulator_get_optional(dev, "vio");
 	if (IS_ERR(ts->vio)) {
 		error = PTR_ERR(ts->vio);
-		dev_err(&spi->dev, "vio regulator missing (%d)", error);
+		dev_err(dev, "vio regulator missing (%d)", error);
 		return error;
 	}
 
@@ -637,12 +545,12 @@ static int tsc2005_probe(struct spi_device *spi)
 	INIT_DELAYED_WORK(&ts->esd_work, tsc2005_esd_work);
 
 	snprintf(ts->phys, sizeof(ts->phys),
-		 "%s/input-ts", dev_name(&spi->dev));
+		 "%s/input-ts", dev_name(dev));
 
 	input_dev->name = "TSC2005 touchscreen";
 	input_dev->phys = ts->phys;
-	input_dev->id.bustype = BUS_SPI;
-	input_dev->dev.parent = &spi->dev;
+	input_dev->id.bustype = bustype;
+	input_dev->dev.parent = dev;
 	input_dev->evbit[0] = BIT(EV_ABS) | BIT(EV_KEY);
 	input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
 
@@ -661,12 +569,12 @@ static int tsc2005_probe(struct spi_device *spi)
 	/* Ensure the touchscreen is off */
 	tsc2005_stop_scan(ts);
 
-	error = devm_request_threaded_irq(&spi->dev, spi->irq, NULL,
+	error = devm_request_threaded_irq(dev, irq, NULL,
 					  tsc2005_irq_thread,
 					  IRQF_TRIGGER_RISING | IRQF_ONESHOT,
 					  "tsc2005", ts);
 	if (error) {
-		dev_err(&spi->dev, "Failed to request irq, err: %d\n", error);
+		dev_err(dev, "Failed to request irq, err: %d\n", error);
 		return error;
 	}
 
@@ -677,43 +585,45 @@ static int tsc2005_probe(struct spi_device *spi)
 			return error;
 	}
 
-	dev_set_drvdata(&spi->dev, ts);
-	error = sysfs_create_group(&spi->dev.kobj, &tsc2005_attr_group);
+	dev_set_drvdata(dev, ts);
+	error = sysfs_create_group(&dev->kobj, &tsc2005_attr_group);
 	if (error) {
-		dev_err(&spi->dev,
+		dev_err(dev,
 			"Failed to create sysfs attributes, err: %d\n", error);
 		goto disable_regulator;
 	}
 
 	error = input_register_device(ts->idev);
 	if (error) {
-		dev_err(&spi->dev,
+		dev_err(dev,
 			"Failed to register input device, err: %d\n", error);
 		goto err_remove_sysfs;
 	}
 
-	irq_set_irq_wake(spi->irq, 1);
+	irq_set_irq_wake(irq, 1);
 	return 0;
 
 err_remove_sysfs:
-	sysfs_remove_group(&spi->dev.kobj, &tsc2005_attr_group);
+	sysfs_remove_group(&dev->kobj, &tsc2005_attr_group);
 disable_regulator:
 	if (ts->vio)
 		regulator_disable(ts->vio);
 	return error;
 }
+EXPORT_SYMBOL_GPL(tsc200x_probe);
 
-static int tsc2005_remove(struct spi_device *spi)
+int tsc200x_remove(struct device *dev)
 {
-	struct tsc2005 *ts = dev_get_drvdata(&spi->dev);
+	struct tsc2005 *ts = dev_get_drvdata(dev);
 
-	sysfs_remove_group(&spi->dev.kobj, &tsc2005_attr_group);
+	sysfs_remove_group(&dev->kobj, &tsc2005_attr_group);
 
 	if (ts->vio)
 		regulator_disable(ts->vio);
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(tsc200x_remove);
 
 static int __maybe_unused tsc2005_suspend(struct device *dev)
 {
@@ -747,21 +657,9 @@ static int __maybe_unused tsc2005_resume(struct device *dev)
 	return 0;
 }
 
-static SIMPLE_DEV_PM_OPS(tsc2005_pm_ops, tsc2005_suspend, tsc2005_resume);
-
-static struct spi_driver tsc2005_driver = {
-	.driver	= {
-		.name	= "tsc2005",
-		.owner	= THIS_MODULE,
-		.pm	= &tsc2005_pm_ops,
-	},
-	.probe	= tsc2005_probe,
-	.remove	= tsc2005_remove,
-};
-
-module_spi_driver(tsc2005_driver);
+SIMPLE_DEV_PM_OPS(tsc200x_pm_ops, tsc2005_suspend, tsc2005_resume);
+EXPORT_SYMBOL_GPL(tsc200x_pm_ops);
 
 MODULE_AUTHOR("Lauri Leukkunen <lauri.leukkunen@nokia.com>");
 MODULE_DESCRIPTION("TSC2005 Touchscreen Driver");
 MODULE_LICENSE("GPL");
-MODULE_ALIAS("spi:tsc2005");
diff --git a/drivers/input/touchscreen/tsc200x-core.h b/drivers/input/touchscreen/tsc200x-core.h
new file mode 100644
index 0000000..3169078
--- /dev/null
+++ b/drivers/input/touchscreen/tsc200x-core.h
@@ -0,0 +1,78 @@
+#ifndef _TSC200X_CORE_H
+#define _TSC200X_CORE_H
+
+/* control byte 1 */
+#define TSC2005_CMD			0x80
+#define TSC2005_CMD_NORMAL		0x00
+#define TSC2005_CMD_STOP		0x01
+#define TSC2005_CMD_12BIT		0x04
+
+/* control byte 0 */
+#define TSC2005_REG_READ		0x01 /* R/W access */
+#define TSC2005_REG_PND0		0x02 /* Power Not Down Control */
+#define TSC2005_REG_X			(0x0 << 3)
+#define TSC2005_REG_Y			(0x1 << 3)
+#define TSC2005_REG_Z1			(0x2 << 3)
+#define TSC2005_REG_Z2			(0x3 << 3)
+#define TSC2005_REG_AUX			(0x4 << 3)
+#define TSC2005_REG_TEMP1		(0x5 << 3)
+#define TSC2005_REG_TEMP2		(0x6 << 3)
+#define TSC2005_REG_STATUS		(0x7 << 3)
+#define TSC2005_REG_AUX_HIGH		(0x8 << 3)
+#define TSC2005_REG_AUX_LOW		(0x9 << 3)
+#define TSC2005_REG_TEMP_HIGH		(0xA << 3)
+#define TSC2005_REG_TEMP_LOW		(0xB << 3)
+#define TSC2005_REG_CFR0		(0xC << 3)
+#define TSC2005_REG_CFR1		(0xD << 3)
+#define TSC2005_REG_CFR2		(0xE << 3)
+#define TSC2005_REG_CONV_FUNC		(0xF << 3)
+
+/* configuration register 0 */
+#define TSC2005_CFR0_PRECHARGE_276US	0x0040
+#define TSC2005_CFR0_STABTIME_1MS	0x0300
+#define TSC2005_CFR0_CLOCK_1MHZ		0x1000
+#define TSC2005_CFR0_RESOLUTION12	0x2000
+#define TSC2005_CFR0_PENMODE		0x8000
+#define TSC2005_CFR0_INITVALUE		(TSC2005_CFR0_STABTIME_1MS    | \
+					 TSC2005_CFR0_CLOCK_1MHZ      | \
+					 TSC2005_CFR0_RESOLUTION12    | \
+					 TSC2005_CFR0_PRECHARGE_276US | \
+					 TSC2005_CFR0_PENMODE)
+
+/* bits common to both read and write of configuration register 0 */
+#define	TSC2005_CFR0_RW_MASK		0x3fff
+
+/* configuration register 1 */
+#define TSC2005_CFR1_BATCHDELAY_4MS	0x0003
+#define TSC2005_CFR1_INITVALUE		TSC2005_CFR1_BATCHDELAY_4MS
+
+/* configuration register 2 */
+#define TSC2005_CFR2_MAVE_Z		0x0004
+#define TSC2005_CFR2_MAVE_Y		0x0008
+#define TSC2005_CFR2_MAVE_X		0x0010
+#define TSC2005_CFR2_AVG_7		0x0800
+#define TSC2005_CFR2_MEDIUM_15		0x3000
+#define TSC2005_CFR2_INITVALUE		(TSC2005_CFR2_MAVE_X	| \
+					 TSC2005_CFR2_MAVE_Y	| \
+					 TSC2005_CFR2_MAVE_Z	| \
+					 TSC2005_CFR2_MEDIUM_15	| \
+					 TSC2005_CFR2_AVG_7)
+
+#define MAX_12BIT			0xfff
+#define TSC2005_DEF_X_FUZZ		4
+#define TSC2005_DEF_Y_FUZZ		8
+#define TSC2005_DEF_P_FUZZ		2
+#define TSC2005_DEF_RESISTOR		280
+
+#define TSC2005_SPI_MAX_SPEED_HZ       10000000
+#define TSC2005_PENUP_TIME_MS		40
+
+extern const struct regmap_config tsc200x_regmap_config;
+extern const struct dev_pm_ops tsc200x_pm_ops;
+
+int tsc200x_probe(struct device *dev, int irq, __u16 bustype,
+		  struct regmap *regmap,
+		  int (*tsc200x_cmd)(struct device *dev, u8 cmd));
+int tsc200x_remove(struct device *dev);
+
+#endif
-- 
2.1.4

[PATCH 2/4] Input: tsc200x-core - Rename functions and variables

[Michael Welling]

The functions, variables, and defines of the new tsc200x-core.c are
renamed to tsc200x instead of tsc2005 avoid possible confusion.

Signed-off-by: Michael Welling <mwelling@ieee.org>
---
 drivers/input/touchscreen/tsc2005.c      |   2 +-
 drivers/input/touchscreen/tsc200x-core.c | 200 +++++++++++++++----------------
 drivers/input/touchscreen/tsc200x-core.h | 102 ++++++++--------
 3 files changed, 152 insertions(+), 152 deletions(-)

diff --git a/drivers/input/touchscreen/tsc2005.c b/drivers/input/touchscreen/tsc2005.c
index fc879cf..cbff18a 100644
--- a/drivers/input/touchscreen/tsc2005.c
+++ b/drivers/input/touchscreen/tsc2005.c
@@ -28,7 +28,7 @@
 
 static int tsc2005_cmd(struct device *dev, u8 cmd)
 {
-	u8 tx = TSC2005_CMD | TSC2005_CMD_12BIT | cmd;
+	u8 tx = TSC200X_CMD | TSC200X_CMD_12BIT | cmd;
 	struct spi_transfer xfer = {
 		.tx_buf         = &tx,
 		.len            = 1,
diff --git a/drivers/input/touchscreen/tsc200x-core.c b/drivers/input/touchscreen/tsc200x-core.c
index 528ad39..6dfcbea 100644
--- a/drivers/input/touchscreen/tsc200x-core.c
+++ b/drivers/input/touchscreen/tsc200x-core.c
@@ -37,28 +37,28 @@
  * The touchscreen interface operates as follows:
  *
  * 1) Pen is pressed against the touchscreen.
- * 2) TSC2005 performs AD conversion.
- * 3) After the conversion is done TSC2005 drives DAV line down.
- * 4) GPIO IRQ is received and tsc2005_irq_thread() is scheduled.
- * 5) tsc2005_irq_thread() queues up a transfer to fetch the x, y, z1, z2
+ * 2) TSC200X performs AD conversion.
+ * 3) After the conversion is done TSC200X drives DAV line down.
+ * 4) GPIO IRQ is received and tsc200x_irq_thread() is scheduled.
+ * 5) tsc200x_irq_thread() queues up a transfer to fetch the x, y, z1, z2
  *    values.
- * 6) tsc2005_irq_thread() reports coordinates to input layer and sets up
- *    tsc2005_penup_timer() to be called after TSC2005_PENUP_TIME_MS (40ms).
+ * 6) tsc200x_irq_thread() reports coordinates to input layer and sets up
+ *    tsc200x_penup_timer() to be called after TSC200X_PENUP_TIME_MS (40ms).
  * 7) When the penup timer expires, there have not been touch or DAV interrupts
  *    during the last 40ms which means the pen has been lifted.
  *
- * ESD recovery via a hardware reset is done if the TSC2005 doesn't respond
+ * ESD recovery via a hardware reset is done if the TSC200X doesn't respond
  * after a configurable period (in ms) of activity. If esd_timeout is 0, the
  * watchdog is disabled.
  */
 
-static const struct regmap_range tsc2005_writable_ranges[] = {
-	regmap_reg_range(TSC2005_REG_AUX_HIGH, TSC2005_REG_CFR2),
+static const struct regmap_range tsc200x_writable_ranges[] = {
+	regmap_reg_range(TSC200X_REG_AUX_HIGH, TSC200X_REG_CFR2),
 };
 
-static const struct regmap_access_table tsc2005_writable_table = {
-	.yes_ranges = tsc2005_writable_ranges,
-	.n_yes_ranges = ARRAY_SIZE(tsc2005_writable_ranges),
+static const struct regmap_access_table tsc200x_writable_table = {
+	.yes_ranges = tsc200x_writable_ranges,
+	.n_yes_ranges = ARRAY_SIZE(tsc200x_writable_ranges),
 };
 
 const struct regmap_config tsc200x_regmap_config = {
@@ -66,21 +66,21 @@ const struct regmap_config tsc200x_regmap_config = {
 	.val_bits = 16,
 	.reg_stride = 0x08,
 	.max_register = 0x78,
-	.read_flag_mask = TSC2005_REG_READ,
-	.write_flag_mask = TSC2005_REG_PND0,
-	.wr_table = &tsc2005_writable_table,
+	.read_flag_mask = TSC200X_REG_READ,
+	.write_flag_mask = TSC200X_REG_PND0,
+	.wr_table = &tsc200x_writable_table,
 	.use_single_rw = true,
 };
 
-struct tsc2005_data {
+struct tsc200x_data {
 	u16 x;
 	u16 y;
 	u16 z1;
 	u16 z2;
 } __packed;
-#define TSC2005_DATA_REGS 4
+#define TSC200X_DATA_REGS 4
 
-struct tsc2005 {
+struct tsc200x {
 	struct device           *dev;
 	struct regmap		*regmap;
 	__u16                   bustype;
@@ -118,7 +118,7 @@ struct tsc2005 {
 	int			irq;
 };
 
-static void tsc2005_update_pen_state(struct tsc2005 *ts,
+static void tsc200x_update_pen_state(struct tsc200x *ts,
 				     int x, int y, int pressure)
 {
 	if (pressure) {
@@ -141,17 +141,17 @@ static void tsc2005_update_pen_state(struct tsc2005 *ts,
 		pressure);
 }
 
-static irqreturn_t tsc2005_irq_thread(int irq, void *_ts)
+static irqreturn_t tsc200x_irq_thread(int irq, void *_ts)
 {
-	struct tsc2005 *ts = _ts;
+	struct tsc200x *ts = _ts;
 	unsigned long flags;
 	unsigned int pressure;
-	struct tsc2005_data tsdata;
+	struct tsc200x_data tsdata;
 	int error;
 
 	/* read the coordinates */
-	error = regmap_bulk_read(ts->regmap, TSC2005_REG_X, &tsdata,
-				 TSC2005_DATA_REGS);
+	error = regmap_bulk_read(ts->regmap, TSC200X_REG_X, &tsdata,
+				 TSC200X_DATA_REGS);
 	if (unlikely(error))
 		goto out;
 
@@ -192,9 +192,9 @@ static irqreturn_t tsc2005_irq_thread(int irq, void *_ts)
 
 	spin_lock_irqsave(&ts->lock, flags);
 
-	tsc2005_update_pen_state(ts, tsdata.x, tsdata.y, pressure);
+	tsc200x_update_pen_state(ts, tsdata.x, tsdata.y, pressure);
 	mod_timer(&ts->penup_timer,
-		  jiffies + msecs_to_jiffies(TSC2005_PENUP_TIME_MS));
+		  jiffies + msecs_to_jiffies(TSC200X_PENUP_TIME_MS));
 
 	spin_unlock_irqrestore(&ts->lock, flags);
 
@@ -203,30 +203,30 @@ out:
 	return IRQ_HANDLED;
 }
 
-static void tsc2005_penup_timer(unsigned long data)
+static void tsc200x_penup_timer(unsigned long data)
 {
-	struct tsc2005 *ts = (struct tsc2005 *)data;
+	struct tsc200x *ts = (struct tsc200x *)data;
 	unsigned long flags;
 
 	spin_lock_irqsave(&ts->lock, flags);
-	tsc2005_update_pen_state(ts, 0, 0, 0);
+	tsc200x_update_pen_state(ts, 0, 0, 0);
 	spin_unlock_irqrestore(&ts->lock, flags);
 }
 
-static void tsc2005_start_scan(struct tsc2005 *ts)
+static void tsc200x_start_scan(struct tsc200x *ts)
 {
-	regmap_write(ts->regmap, TSC2005_REG_CFR0, TSC2005_CFR0_INITVALUE);
-	regmap_write(ts->regmap, TSC2005_REG_CFR1, TSC2005_CFR1_INITVALUE);
-	regmap_write(ts->regmap, TSC2005_REG_CFR2, TSC2005_CFR2_INITVALUE);
-	ts->tsc200x_cmd(ts->dev, TSC2005_CMD_NORMAL);
+	regmap_write(ts->regmap, TSC200X_REG_CFR0, TSC200X_CFR0_INITVALUE);
+	regmap_write(ts->regmap, TSC200X_REG_CFR1, TSC200X_CFR1_INITVALUE);
+	regmap_write(ts->regmap, TSC200X_REG_CFR2, TSC200X_CFR2_INITVALUE);
+	ts->tsc200x_cmd(ts->dev, TSC200X_CMD_NORMAL);
 }
 
-static void tsc2005_stop_scan(struct tsc2005 *ts)
+static void tsc200x_stop_scan(struct tsc200x *ts)
 {
-	ts->tsc200x_cmd(ts->dev, TSC2005_CMD_STOP);
+	ts->tsc200x_cmd(ts->dev, TSC200X_CMD_STOP);
 }
 
-static void tsc2005_set_reset(struct tsc2005 *ts, bool enable)
+static void tsc200x_set_reset(struct tsc200x *ts, bool enable)
 {
 	if (ts->reset_gpio)
 		gpiod_set_value_cansleep(ts->reset_gpio, enable);
@@ -235,9 +235,9 @@ static void tsc2005_set_reset(struct tsc2005 *ts, bool enable)
 }
 
 /* must be called with ts->mutex held */
-static void __tsc2005_disable(struct tsc2005 *ts)
+static void __tsc200x_disable(struct tsc200x *ts)
 {
-	tsc2005_stop_scan(ts);
+	tsc200x_stop_scan(ts);
 
 	disable_irq(ts->irq);
 	del_timer_sync(&ts->penup_timer);
@@ -248,9 +248,9 @@ static void __tsc2005_disable(struct tsc2005 *ts)
 }
 
 /* must be called with ts->mutex held */
-static void __tsc2005_enable(struct tsc2005 *ts)
+static void __tsc200x_enable(struct tsc200x *ts)
 {
-	tsc2005_start_scan(ts);
+	tsc200x_start_scan(ts);
 
 	if (ts->esd_timeout && (ts->set_reset || ts->reset_gpio)) {
 		ts->last_valid_interrupt = jiffies;
@@ -261,11 +261,11 @@ static void __tsc2005_enable(struct tsc2005 *ts)
 
 }
 
-static ssize_t tsc2005_selftest_show(struct device *dev,
+static ssize_t tsc200x_selftest_show(struct device *dev,
 				     struct device_attribute *attr,
 				     char *buf)
 {
-	struct tsc2005 *ts = dev_get_drvdata(dev);
+	struct tsc200x *ts = dev_get_drvdata(dev);
 	unsigned int temp_high;
 	unsigned int temp_high_orig;
 	unsigned int temp_high_test;
@@ -275,11 +275,11 @@ static ssize_t tsc2005_selftest_show(struct device *dev,
 	mutex_lock(&ts->mutex);
 
 	/*
-	 * Test TSC2005 communications via temp high register.
+	 * Test TSC200X communications via temp high register.
 	 */
-	__tsc2005_disable(ts);
+	__tsc200x_disable(ts);
 
-	error = regmap_read(ts->regmap, TSC2005_REG_TEMP_HIGH, &temp_high_orig);
+	error = regmap_read(ts->regmap, TSC200X_REG_TEMP_HIGH, &temp_high_orig);
 	if (error) {
 		dev_warn(dev, "selftest failed: read error %d\n", error);
 		success = false;
@@ -288,14 +288,14 @@ static ssize_t tsc2005_selftest_show(struct device *dev,
 
 	temp_high_test = (temp_high_orig - 1) & MAX_12BIT;
 
-	error = regmap_write(ts->regmap, TSC2005_REG_TEMP_HIGH, temp_high_test);
+	error = regmap_write(ts->regmap, TSC200X_REG_TEMP_HIGH, temp_high_test);
 	if (error) {
 		dev_warn(dev, "selftest failed: write error %d\n", error);
 		success = false;
 		goto out;
 	}
 
-	error = regmap_read(ts->regmap, TSC2005_REG_TEMP_HIGH, &temp_high);
+	error = regmap_read(ts->regmap, TSC200X_REG_TEMP_HIGH, &temp_high);
 	if (error) {
 		dev_warn(dev, "selftest failed: read error %d after write\n",
 			 error);
@@ -310,15 +310,15 @@ static ssize_t tsc2005_selftest_show(struct device *dev,
 	}
 
 	/* hardware reset */
-	tsc2005_set_reset(ts, false);
+	tsc200x_set_reset(ts, false);
 	usleep_range(100, 500); /* only 10us required */
-	tsc2005_set_reset(ts, true);
+	tsc200x_set_reset(ts, true);
 
 	if (!success)
 		goto out;
 
 	/* test that the reset really happened */
-	error = regmap_read(ts->regmap, TSC2005_REG_TEMP_HIGH, &temp_high);
+	error = regmap_read(ts->regmap, TSC200X_REG_TEMP_HIGH, &temp_high);
 	if (error) {
 		dev_warn(dev, "selftest failed: read error %d after reset\n",
 			 error);
@@ -333,24 +333,24 @@ static ssize_t tsc2005_selftest_show(struct device *dev,
 	}
 
 out:
-	__tsc2005_enable(ts);
+	__tsc200x_enable(ts);
 	mutex_unlock(&ts->mutex);
 
 	return sprintf(buf, "%d\n", success);
 }
 
-static DEVICE_ATTR(selftest, S_IRUGO, tsc2005_selftest_show, NULL);
+static DEVICE_ATTR(selftest, S_IRUGO, tsc200x_selftest_show, NULL);
 
-static struct attribute *tsc2005_attrs[] = {
+static struct attribute *tsc200x_attrs[] = {
 	&dev_attr_selftest.attr,
 	NULL
 };
 
-static umode_t tsc2005_attr_is_visible(struct kobject *kobj,
+static umode_t tsc200x_attr_is_visible(struct kobject *kobj,
 				      struct attribute *attr, int n)
 {
 	struct device *dev = container_of(kobj, struct device, kobj);
-	struct tsc2005 *ts = dev_get_drvdata(dev);
+	struct tsc200x *ts = dev_get_drvdata(dev);
 	umode_t mode = attr->mode;
 
 	if (attr == &dev_attr_selftest.attr) {
@@ -361,14 +361,14 @@ static umode_t tsc2005_attr_is_visible(struct kobject *kobj,
 	return mode;
 }
 
-static const struct attribute_group tsc2005_attr_group = {
-	.is_visible	= tsc2005_attr_is_visible,
-	.attrs		= tsc2005_attrs,
+static const struct attribute_group tsc200x_attr_group = {
+	.is_visible	= tsc200x_attr_is_visible,
+	.attrs		= tsc200x_attrs,
 };
 
-static void tsc2005_esd_work(struct work_struct *work)
+static void tsc200x_esd_work(struct work_struct *work)
 {
-	struct tsc2005 *ts = container_of(work, struct tsc2005, esd_work.work);
+	struct tsc200x *ts = container_of(work, struct tsc200x, esd_work.work);
 	int error;
 	unsigned int r;
 
@@ -386,9 +386,9 @@ static void tsc2005_esd_work(struct work_struct *work)
 		goto out;
 
 	/* We should be able to read register without disabling interrupts. */
-	error = regmap_read(ts->regmap, TSC2005_REG_CFR0, &r);
+	error = regmap_read(ts->regmap, TSC200X_REG_CFR0, &r);
 	if (!error &&
-	    !((r ^ TSC2005_CFR0_INITVALUE) & TSC2005_CFR0_RW_MASK)) {
+	    !((r ^ TSC200X_CFR0_INITVALUE) & TSC200X_CFR0_RW_MASK)) {
 		goto out;
 	}
 
@@ -397,19 +397,19 @@ static void tsc2005_esd_work(struct work_struct *work)
 	 * then we should reset the controller as if from power-up and start
 	 * scanning again.
 	 */
-	dev_info(ts->dev, "TSC2005 not responding - resetting\n");
+	dev_info(ts->dev, "TSC200X not responding - resetting\n");
 
 	disable_irq(ts->irq);
 	del_timer_sync(&ts->penup_timer);
 
-	tsc2005_update_pen_state(ts, 0, 0, 0);
+	tsc200x_update_pen_state(ts, 0, 0, 0);
 
-	tsc2005_set_reset(ts, false);
+	tsc200x_set_reset(ts, false);
 	usleep_range(100, 500); /* only 10us required */
-	tsc2005_set_reset(ts, true);
+	tsc200x_set_reset(ts, true);
 
 	enable_irq(ts->irq);
-	tsc2005_start_scan(ts);
+	tsc200x_start_scan(ts);
 
 out:
 	mutex_unlock(&ts->mutex);
@@ -420,14 +420,14 @@ reschedule:
 					msecs_to_jiffies(ts->esd_timeout)));
 }
 
-static int tsc2005_open(struct input_dev *input)
+static int tsc200x_open(struct input_dev *input)
 {
-	struct tsc2005 *ts = input_get_drvdata(input);
+	struct tsc200x *ts = input_get_drvdata(input);
 
 	mutex_lock(&ts->mutex);
 
 	if (!ts->suspended)
-		__tsc2005_enable(ts);
+		__tsc200x_enable(ts);
 
 	ts->opened = true;
 
@@ -436,14 +436,14 @@ static int tsc2005_open(struct input_dev *input)
 	return 0;
 }
 
-static void tsc2005_close(struct input_dev *input)
+static void tsc200x_close(struct input_dev *input)
 {
-	struct tsc2005 *ts = input_get_drvdata(input);
+	struct tsc200x *ts = input_get_drvdata(input);
 
 	mutex_lock(&ts->mutex);
 
 	if (!ts->suspended)
-		__tsc2005_disable(ts);
+		__tsc200x_disable(ts);
 
 	ts->opened = false;
 
@@ -457,15 +457,15 @@ int tsc200x_probe(struct device *dev, int irq, __u16 bustype,
 	const struct tsc2005_platform_data *pdata = dev_get_platdata(dev);
 	struct device_node *np = dev->of_node;
 
-	struct tsc2005 *ts;
+	struct tsc200x *ts;
 	struct input_dev *input_dev;
 	unsigned int max_x = MAX_12BIT;
 	unsigned int max_y = MAX_12BIT;
 	unsigned int max_p = MAX_12BIT;
-	unsigned int fudge_x = TSC2005_DEF_X_FUZZ;
-	unsigned int fudge_y = TSC2005_DEF_Y_FUZZ;
-	unsigned int fudge_p = TSC2005_DEF_P_FUZZ;
-	unsigned int x_plate_ohm = TSC2005_DEF_RESISTOR;
+	unsigned int fudge_x = TSC200X_DEF_X_FUZZ;
+	unsigned int fudge_y = TSC200X_DEF_Y_FUZZ;
+	unsigned int fudge_p = TSC200X_DEF_P_FUZZ;
+	unsigned int x_plate_ohm = TSC200X_DEF_RESISTOR;
 	unsigned int esd_timeout;
 	int error;
 
@@ -497,7 +497,7 @@ int tsc200x_probe(struct device *dev, int irq, __u16 bustype,
 		x_plate_ohm = pdata->ts_x_plate_ohm;
 		esd_timeout = pdata->esd_timeout_ms;
 	} else {
-		x_plate_ohm = TSC2005_DEF_RESISTOR;
+		x_plate_ohm = TSC200X_DEF_RESISTOR;
 		of_property_read_u32(np, "ti,x-plate-ohms", &x_plate_ohm);
 		esd_timeout = 0;
 		of_property_read_u32(np, "ti,esd-recovery-timeout-ms",
@@ -540,14 +540,14 @@ int tsc200x_probe(struct device *dev, int irq, __u16 bustype,
 	mutex_init(&ts->mutex);
 
 	spin_lock_init(&ts->lock);
-	setup_timer(&ts->penup_timer, tsc2005_penup_timer, (unsigned long)ts);
+	setup_timer(&ts->penup_timer, tsc200x_penup_timer, (unsigned long)ts);
 
-	INIT_DELAYED_WORK(&ts->esd_work, tsc2005_esd_work);
+	INIT_DELAYED_WORK(&ts->esd_work, tsc200x_esd_work);
 
 	snprintf(ts->phys, sizeof(ts->phys),
 		 "%s/input-ts", dev_name(dev));
 
-	input_dev->name = "TSC2005 touchscreen";
+	input_dev->name = "TSC200X touchscreen";
 	input_dev->phys = ts->phys;
 	input_dev->id.bustype = bustype;
 	input_dev->dev.parent = dev;
@@ -561,18 +561,18 @@ int tsc200x_probe(struct device *dev, int irq, __u16 bustype,
 	if (np)
 		touchscreen_parse_properties(input_dev, false);
 
-	input_dev->open = tsc2005_open;
-	input_dev->close = tsc2005_close;
+	input_dev->open = tsc200x_open;
+	input_dev->close = tsc200x_close;
 
 	input_set_drvdata(input_dev, ts);
 
 	/* Ensure the touchscreen is off */
-	tsc2005_stop_scan(ts);
+	tsc200x_stop_scan(ts);
 
 	error = devm_request_threaded_irq(dev, irq, NULL,
-					  tsc2005_irq_thread,
+					  tsc200x_irq_thread,
 					  IRQF_TRIGGER_RISING | IRQF_ONESHOT,
-					  "tsc2005", ts);
+					  "tsc200x", ts);
 	if (error) {
 		dev_err(dev, "Failed to request irq, err: %d\n", error);
 		return error;
@@ -586,7 +586,7 @@ int tsc200x_probe(struct device *dev, int irq, __u16 bustype,
 	}
 
 	dev_set_drvdata(dev, ts);
-	error = sysfs_create_group(&dev->kobj, &tsc2005_attr_group);
+	error = sysfs_create_group(&dev->kobj, &tsc200x_attr_group);
 	if (error) {
 		dev_err(dev,
 			"Failed to create sysfs attributes, err: %d\n", error);
@@ -604,7 +604,7 @@ int tsc200x_probe(struct device *dev, int irq, __u16 bustype,
 	return 0;
 
 err_remove_sysfs:
-	sysfs_remove_group(&dev->kobj, &tsc2005_attr_group);
+	sysfs_remove_group(&dev->kobj, &tsc200x_attr_group);
 disable_regulator:
 	if (ts->vio)
 		regulator_disable(ts->vio);
@@ -614,9 +614,9 @@ EXPORT_SYMBOL_GPL(tsc200x_probe);
 
 int tsc200x_remove(struct device *dev)
 {
-	struct tsc2005 *ts = dev_get_drvdata(dev);
+	struct tsc200x *ts = dev_get_drvdata(dev);
 
-	sysfs_remove_group(&dev->kobj, &tsc2005_attr_group);
+	sysfs_remove_group(&dev->kobj, &tsc200x_attr_group);
 
 	if (ts->vio)
 		regulator_disable(ts->vio);
@@ -625,14 +625,14 @@ int tsc200x_remove(struct device *dev)
 }
 EXPORT_SYMBOL_GPL(tsc200x_remove);
 
-static int __maybe_unused tsc2005_suspend(struct device *dev)
+static int __maybe_unused tsc200x_suspend(struct device *dev)
 {
-	struct tsc2005 *ts = dev_get_drvdata(dev);
+	struct tsc200x *ts = dev_get_drvdata(dev);
 
 	mutex_lock(&ts->mutex);
 
 	if (!ts->suspended && ts->opened)
-		__tsc2005_disable(ts);
+		__tsc200x_disable(ts);
 
 	ts->suspended = true;
 
@@ -641,14 +641,14 @@ static int __maybe_unused tsc2005_suspend(struct device *dev)
 	return 0;
 }
 
-static int __maybe_unused tsc2005_resume(struct device *dev)
+static int __maybe_unused tsc200x_resume(struct device *dev)
 {
-	struct tsc2005 *ts = dev_get_drvdata(dev);
+	struct tsc200x *ts = dev_get_drvdata(dev);
 
 	mutex_lock(&ts->mutex);
 
 	if (ts->suspended && ts->opened)
-		__tsc2005_enable(ts);
+		__tsc200x_enable(ts);
 
 	ts->suspended = false;
 
@@ -657,9 +657,9 @@ static int __maybe_unused tsc2005_resume(struct device *dev)
 	return 0;
 }
 
-SIMPLE_DEV_PM_OPS(tsc200x_pm_ops, tsc2005_suspend, tsc2005_resume);
+SIMPLE_DEV_PM_OPS(tsc200x_pm_ops, tsc200x_suspend, tsc200x_resume);
 EXPORT_SYMBOL_GPL(tsc200x_pm_ops);
 
 MODULE_AUTHOR("Lauri Leukkunen <lauri.leukkunen@nokia.com>");
-MODULE_DESCRIPTION("TSC2005 Touchscreen Driver");
+MODULE_DESCRIPTION("TSC200x Touchscreen Driver Core");
 MODULE_LICENSE("GPL");
diff --git a/drivers/input/touchscreen/tsc200x-core.h b/drivers/input/touchscreen/tsc200x-core.h
index 3169078..7a482d1 100644
--- a/drivers/input/touchscreen/tsc200x-core.h
+++ b/drivers/input/touchscreen/tsc200x-core.h
@@ -2,70 +2,70 @@
 #define _TSC200X_CORE_H
 
 /* control byte 1 */
-#define TSC2005_CMD			0x80
-#define TSC2005_CMD_NORMAL		0x00
-#define TSC2005_CMD_STOP		0x01
-#define TSC2005_CMD_12BIT		0x04
+#define TSC200X_CMD			0x80
+#define TSC200X_CMD_NORMAL		0x00
+#define TSC200X_CMD_STOP		0x01
+#define TSC200X_CMD_12BIT		0x04
 
 /* control byte 0 */
-#define TSC2005_REG_READ		0x01 /* R/W access */
-#define TSC2005_REG_PND0		0x02 /* Power Not Down Control */
-#define TSC2005_REG_X			(0x0 << 3)
-#define TSC2005_REG_Y			(0x1 << 3)
-#define TSC2005_REG_Z1			(0x2 << 3)
-#define TSC2005_REG_Z2			(0x3 << 3)
-#define TSC2005_REG_AUX			(0x4 << 3)
-#define TSC2005_REG_TEMP1		(0x5 << 3)
-#define TSC2005_REG_TEMP2		(0x6 << 3)
-#define TSC2005_REG_STATUS		(0x7 << 3)
-#define TSC2005_REG_AUX_HIGH		(0x8 << 3)
-#define TSC2005_REG_AUX_LOW		(0x9 << 3)
-#define TSC2005_REG_TEMP_HIGH		(0xA << 3)
-#define TSC2005_REG_TEMP_LOW		(0xB << 3)
-#define TSC2005_REG_CFR0		(0xC << 3)
-#define TSC2005_REG_CFR1		(0xD << 3)
-#define TSC2005_REG_CFR2		(0xE << 3)
-#define TSC2005_REG_CONV_FUNC		(0xF << 3)
+#define TSC200X_REG_READ		0x01 /* R/W access */
+#define TSC200X_REG_PND0		0x02 /* Power Not Down Control */
+#define TSC200X_REG_X			(0x0 << 3)
+#define TSC200X_REG_Y			(0x1 << 3)
+#define TSC200X_REG_Z1			(0x2 << 3)
+#define TSC200X_REG_Z2			(0x3 << 3)
+#define TSC200X_REG_AUX			(0x4 << 3)
+#define TSC200X_REG_TEMP1		(0x5 << 3)
+#define TSC200X_REG_TEMP2		(0x6 << 3)
+#define TSC200X_REG_STATUS		(0x7 << 3)
+#define TSC200X_REG_AUX_HIGH		(0x8 << 3)
+#define TSC200X_REG_AUX_LOW		(0x9 << 3)
+#define TSC200X_REG_TEMP_HIGH		(0xA << 3)
+#define TSC200X_REG_TEMP_LOW		(0xB << 3)
+#define TSC200X_REG_CFR0		(0xC << 3)
+#define TSC200X_REG_CFR1		(0xD << 3)
+#define TSC200X_REG_CFR2		(0xE << 3)
+#define TSC200X_REG_CONV_FUNC		(0xF << 3)
 
 /* configuration register 0 */
-#define TSC2005_CFR0_PRECHARGE_276US	0x0040
-#define TSC2005_CFR0_STABTIME_1MS	0x0300
-#define TSC2005_CFR0_CLOCK_1MHZ		0x1000
-#define TSC2005_CFR0_RESOLUTION12	0x2000
-#define TSC2005_CFR0_PENMODE		0x8000
-#define TSC2005_CFR0_INITVALUE		(TSC2005_CFR0_STABTIME_1MS    | \
-					 TSC2005_CFR0_CLOCK_1MHZ      | \
-					 TSC2005_CFR0_RESOLUTION12    | \
-					 TSC2005_CFR0_PRECHARGE_276US | \
-					 TSC2005_CFR0_PENMODE)
+#define TSC200X_CFR0_PRECHARGE_276US	0x0040
+#define TSC200X_CFR0_STABTIME_1MS	0x0300
+#define TSC200X_CFR0_CLOCK_1MHZ		0x1000
+#define TSC200X_CFR0_RESOLUTION12	0x2000
+#define TSC200X_CFR0_PENMODE		0x8000
+#define TSC200X_CFR0_INITVALUE		(TSC200X_CFR0_STABTIME_1MS    | \
+					 TSC200X_CFR0_CLOCK_1MHZ      | \
+					 TSC200X_CFR0_RESOLUTION12    | \
+					 TSC200X_CFR0_PRECHARGE_276US | \
+					 TSC200X_CFR0_PENMODE)
 
 /* bits common to both read and write of configuration register 0 */
-#define	TSC2005_CFR0_RW_MASK		0x3fff
+#define	TSC200X_CFR0_RW_MASK		0x3fff
 
 /* configuration register 1 */
-#define TSC2005_CFR1_BATCHDELAY_4MS	0x0003
-#define TSC2005_CFR1_INITVALUE		TSC2005_CFR1_BATCHDELAY_4MS
+#define TSC200X_CFR1_BATCHDELAY_4MS	0x0003
+#define TSC200X_CFR1_INITVALUE		TSC200X_CFR1_BATCHDELAY_4MS
 
 /* configuration register 2 */
-#define TSC2005_CFR2_MAVE_Z		0x0004
-#define TSC2005_CFR2_MAVE_Y		0x0008
-#define TSC2005_CFR2_MAVE_X		0x0010
-#define TSC2005_CFR2_AVG_7		0x0800
-#define TSC2005_CFR2_MEDIUM_15		0x3000
-#define TSC2005_CFR2_INITVALUE		(TSC2005_CFR2_MAVE_X	| \
-					 TSC2005_CFR2_MAVE_Y	| \
-					 TSC2005_CFR2_MAVE_Z	| \
-					 TSC2005_CFR2_MEDIUM_15	| \
-					 TSC2005_CFR2_AVG_7)
+#define TSC200X_CFR2_MAVE_Z		0x0004
+#define TSC200X_CFR2_MAVE_Y		0x0008
+#define TSC200X_CFR2_MAVE_X		0x0010
+#define TSC200X_CFR2_AVG_7		0x0800
+#define TSC200X_CFR2_MEDIUM_15		0x3000
+#define TSC200X_CFR2_INITVALUE		(TSC200X_CFR2_MAVE_X	| \
+					 TSC200X_CFR2_MAVE_Y	| \
+					 TSC200X_CFR2_MAVE_Z	| \
+					 TSC200X_CFR2_MEDIUM_15	| \
+					 TSC200X_CFR2_AVG_7)
 
 #define MAX_12BIT			0xfff
-#define TSC2005_DEF_X_FUZZ		4
-#define TSC2005_DEF_Y_FUZZ		8
-#define TSC2005_DEF_P_FUZZ		2
-#define TSC2005_DEF_RESISTOR		280
+#define TSC200X_DEF_X_FUZZ		4
+#define TSC200X_DEF_Y_FUZZ		8
+#define TSC200X_DEF_P_FUZZ		2
+#define TSC200X_DEF_RESISTOR		280
 
-#define TSC2005_SPI_MAX_SPEED_HZ       10000000
-#define TSC2005_PENUP_TIME_MS		40
+#define TSC2005_SPI_MAX_SPEED_HZ	10000000
+#define TSC200X_PENUP_TIME_MS		40
 
 extern const struct regmap_config tsc200x_regmap_config;
 extern const struct dev_pm_ops tsc200x_pm_ops;
-- 
2.1.4

[PATCH 3/4] Input: tsc2004 - Add support for tsc2004

[Michael Welling]

Adds support for the i2c based tsc2004.

Signed-off-by: Michael Welling <mwelling@ieee.org>
---
 drivers/input/touchscreen/Kconfig   | 13 ++++++
 drivers/input/touchscreen/Makefile  |  1 +
 drivers/input/touchscreen/tsc2004.c | 86 +++++++++++++++++++++++++++++++++++++
 3 files changed, 100 insertions(+)
 create mode 100644 drivers/input/touchscreen/tsc2004.c

diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 6a5878b..ae33da7 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -942,6 +942,19 @@ config TOUCHSCREEN_TSC_SERIO
 config TOUCHSCREEN_TSC200X_CORE
 	tristate
 
+config TOUCHSCREEN_TSC2004
+	tristate "TSC2004 based touchscreens"
+	depends on I2C
+	select REGMAP_I2C
+	select TOUCHSCREEN_TSC200X_CORE
+	help
+	  Say Y here if you have a TSC2004 based touchscreen.
+
+	  If unsure, say N.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called tsc2004.
+
 config TOUCHSCREEN_TSC2005
 	tristate "TSC2005 based touchscreens"
 	depends on SPI_MASTER
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 03179f2..cbaa6ab 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -70,6 +70,7 @@ obj-$(CONFIG_TOUCHSCREEN_TOUCHRIGHT)	+= touchright.o
 obj-$(CONFIG_TOUCHSCREEN_TOUCHWIN)	+= touchwin.o
 obj-$(CONFIG_TOUCHSCREEN_TSC_SERIO)	+= tsc40.o
 obj-$(CONFIG_TOUCHSCREEN_TSC200X_CORE)	+= tsc200x-core.o
+obj-$(CONFIG_TOUCHSCREEN_TSC2004)	+= tsc2004.o
 obj-$(CONFIG_TOUCHSCREEN_TSC2005)	+= tsc2005.o
 obj-$(CONFIG_TOUCHSCREEN_TSC2007)	+= tsc2007.o
 obj-$(CONFIG_TOUCHSCREEN_UCB1400)	+= ucb1400_ts.o
diff --git a/drivers/input/touchscreen/tsc2004.c b/drivers/input/touchscreen/tsc2004.c
new file mode 100644
index 0000000..d2f7a6b
--- /dev/null
+++ b/drivers/input/touchscreen/tsc2004.c
@@ -0,0 +1,86 @@
+/*
+ * TSC2004 touchscreen driver
+ *
+ * Copyright (C) 2015 QWERTY Embedded Design
+ * Copyright (C) 2015 EMAC Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/input.h>
+#include <linux/pm.h>
+#include <linux/of.h>
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+#include "tsc200x-core.h"
+
+static int tsc2004_cmd(struct device *dev, u8 cmd)
+{
+	u8 tx = TSC200X_CMD | TSC200X_CMD_12BIT | cmd;
+	s32 data;
+	struct i2c_client *i2c = to_i2c_client(dev);
+
+	data = i2c_smbus_write_byte(i2c, tx);
+	if (data < 0) {
+		dev_err(dev, "%s: failed, command: %x i2c error: %d\n",
+			__func__, cmd, data);
+		return data;
+	}
+
+	return 0;
+}
+
+static int tsc2004_probe(struct i2c_client *i2c,
+			 const struct i2c_device_id *id)
+
+{
+	return tsc200x_probe(&i2c->dev, i2c->irq, BUS_I2C,
+			     devm_regmap_init_i2c(i2c, &tsc200x_regmap_config),
+			     &tsc2004_cmd);
+}
+
+static int tsc2004_remove(struct i2c_client *i2c)
+{
+	return tsc200x_remove(&i2c->dev);
+}
+
+static const struct i2c_device_id tsc2004_idtable[] = {
+	{ "tsc2004", 0 },
+	{ }
+};
+
+MODULE_DEVICE_TABLE(i2c, tsc2004_idtable);
+
+#ifdef CONFIG_OF
+static const struct of_device_id tsc2004_of_match[] = {
+	{ .compatible = "ti,tsc2004" },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, tsc2004_of_match);
+#endif
+
+static struct i2c_driver tsc2004_driver = {
+	.driver = {
+		.name   = "tsc2004",
+		.of_match_table = of_match_ptr(tsc2004_of_match),
+		.pm     = &tsc200x_pm_ops,
+	},
+	.id_table       = tsc2004_idtable,
+	.probe          = tsc2004_probe,
+	.remove         = tsc2004_remove,
+};
+
+module_i2c_driver(tsc2004_driver);
+
+MODULE_AUTHOR("Michael Welling <mwelling@ieee.org>");
+MODULE_DESCRIPTION("TSC2004 Touchscreen Driver");
+MODULE_LICENSE("GPL");
-- 
2.1.4

[PATCH 4/4] Input: tsc2004 - Document ts2004 dt bindings

[Michael Welling]

Adds documentation for the devicetree bindings of the new tsc2004 driver.

Signed-off-by: Michael Welling <mwelling@ieee.org>
---
 .../bindings/input/touchscreen/tsc2005.txt         | 39 ++++++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/Documentation/devicetree/bindings/input/touchscreen/tsc2005.txt b/Documentation/devicetree/bindings/input/touchscreen/tsc2005.txt
index 09089a6..27c6082 100644
--- a/Documentation/devicetree/bindings/input/touchscreen/tsc2005.txt
+++ b/Documentation/devicetree/bindings/input/touchscreen/tsc2005.txt
@@ -1,3 +1,42 @@
+* Texas Instruments tsc2004 touchscreen controller
+
+Required properties:
+ - compatible		      : "ti,tsc2004"
+ - interrupts		      : IRQ specifier
+ - vio-supply                 : Regulator specifier
+
+Optional properties:
+ - reset-gpios		      : GPIO specifier
+ - ti,x-plate-ohms	      : integer, resistance of the touchscreen's X plates
+				in ohm (defaults to 280)
+ - ti,esd-recovery-timeout-ms : integer, if the touchscreen does not respond after
+				the configured time (in milli seconds), the driver
+				will reset it. This is disabled by default.
+ - properties defined in touchscreen.txt
+
+Example:
+
+&i2c3 {
+	tsc2004@48 {
+		compatible = "ti,tsc2004";
+		reg = <0x48>;
+		vio-supply = <&vio>;
+
+		reset-gpios = <&gpio4 8 GPIO_ACTIVE_HIGH>;
+		interrupts-extended = <&gpio1 27 IRQ_TYPE_EDGE_RISING>;
+
+		touchscreen-fuzz-x = <4>;
+		touchscreen-fuzz-y = <7>;
+		touchscreen-fuzz-pressure = <2>;
+		touchscreen-size-x = <4096>;
+		touchscreen-size-y = <4096>;
+		touchscreen-max-pressure = <2048>;
+
+		ti,x-plate-ohms = <280>;
+		ti,esd-recovery-timeout-ms = <8000>;
+	};
+}
+
 * Texas Instruments tsc2005 touchscreen controller
 
 Required properties:
-- 
2.1.4

Re: [PATCH 4/4] Input: tsc2004 - Document ts2004 dt bindings

[Rob Herring]

On Fri, Oct 30, 2015 at 7:41 PM, Michael Welling <mwelling@ieee.org> wrote:
> Adds documentation for the devicetree bindings of the new tsc2004 driver.
>
> Signed-off-by: Michael Welling <mwelling@ieee.org>
> ---
>  .../bindings/input/touchscreen/tsc2005.txt         | 39 ++++++++++++++++++++++
>  1 file changed, 39 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/input/touchscreen/tsc2005.txt b/Documentation/devicetree/bindings/input/touchscreen/tsc2005.txt
> index 09089a6..27c6082 100644
> --- a/Documentation/devicetree/bindings/input/touchscreen/tsc2005.txt
> +++ b/Documentation/devicetree/bindings/input/touchscreen/tsc2005.txt
> @@ -1,3 +1,42 @@
> +* Texas Instruments tsc2004 touchscreen controller
> +
> +Required properties:
> + - compatible                : "ti,tsc2004"
> + - interrupts                : IRQ specifier
> + - vio-supply                 : Regulator specifier

reg property?

> +
> +Optional properties:
> + - reset-gpios               : GPIO specifier
> + - ti,x-plate-ohms           : integer, resistance of the touchscreen's X plates
> +                               in ohm (defaults to 280)
> + - ti,esd-recovery-timeout-ms : integer, if the touchscreen does not respond after
> +                               the configured time (in milli seconds), the driver
> +                               will reset it. This is disabled by default.
> + - properties defined in touchscreen.txt
> +
> +Example:
> +
> +&i2c3 {
> +       tsc2004@48 {
> +               compatible = "ti,tsc2004";
> +               reg = <0x48>;
> +               vio-supply = <&vio>;
> +
> +               reset-gpios = <&gpio4 8 GPIO_ACTIVE_HIGH>;
> +               interrupts-extended = <&gpio1 27 IRQ_TYPE_EDGE_RISING>;
> +
> +               touchscreen-fuzz-x = <4>;
> +               touchscreen-fuzz-y = <7>;
> +               touchscreen-fuzz-pressure = <2>;
> +               touchscreen-size-x = <4096>;
> +               touchscreen-size-y = <4096>;
> +               touchscreen-max-pressure = <2048>;
> +
> +               ti,x-plate-ohms = <280>;
> +               ti,esd-recovery-timeout-ms = <8000>;
> +       };
> +}
> +
>  * Texas Instruments tsc2005 touchscreen controller
>
>  Required properties:
> --
> 2.1.4
>
> --
> To unsubscribe from this list: send the line "unsubscribe devicetree" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: [PATCH 4/4] Input: tsc2004 - Document ts2004 dt bindings

[Michael Welling]

On Mon, Nov 02, 2015 at 09:19:50AM -0600, Rob Herring wrote:
> > +Required properties:
> > + - compatible                : "ti,tsc2004"
> > + - interrupts                : IRQ specifier
> > + - vio-supply                 : Regulator specifier
> 
> reg property?

Rob,

It appears that I missed this in the description.

Probably because I was following the lead of the ts2005 description.

How does this look:
- reg			: I2C address. 0x48 - 0x4b based on the voltage applied to
			  the AD1 and AD0 inputs on the IC.

Do I have to spin the whole series to update this patch?

Everyone,

Are there any other concerns with this patch series?

Regards,

Michael

Re: [PATCH 1/4] Input: tsc2005 - Separate SPI and core functions

[Dmitry Torokhov]

On Fri, Oct 30, 2015 at 07:41:23PM -0500, Michael Welling wrote:
> This patch separates the SPI functionality from core functionality
> that overlaps with the tsc2004.
> 
> Prepares kernel for new tsc2004 driver without much redundant code.
> 
> Signed-off-by: Michael Welling <mwelling@ieee.org>
> ---
>  drivers/input/touchscreen/Kconfig                  |   4 +
>  drivers/input/touchscreen/Makefile                 |   1 +
>  drivers/input/touchscreen/tsc2005.c                | 709 +--------------------
>  .../touchscreen/{tsc2005.c => tsc200x-core.c}      | 226 ++-----
>  drivers/input/touchscreen/tsc200x-core.h           |  78 +++
>  5 files changed, 162 insertions(+), 856 deletions(-)
>  copy drivers/input/touchscreen/{tsc2005.c => tsc200x-core.c} (72%)
>  create mode 100644 drivers/input/touchscreen/tsc200x-core.h

This was giving me:

Kernel: arch/x86/boot/bzImage is ready  (#1451)
  MODPOST 1447 modules
ERROR: "tsc200x_regmap_config" [drivers/input/touchscreen/tsc2005.ko] undefined!
make[1]: *** [__modpost] Error 1
make: *** [modules] Error 2

I'll fix it up locally by exporting the symbol.

Thanks.

-- 
Dmitry

Re: [PATCH 4/4] Input: tsc2004 - Document ts2004 dt bindings

[Dmitry Torokhov]

On Mon, Nov 02, 2015 at 02:50:29PM -0600, Michael Welling wrote:
> On Mon, Nov 02, 2015 at 09:19:50AM -0600, Rob Herring wrote:
> > > +Required properties:
> > > + - compatible                : "ti,tsc2004"
> > > + - interrupts                : IRQ specifier
> > > + - vio-supply                 : Regulator specifier
> > 
> > reg property?
> 
> Rob,
> 
> It appears that I missed this in the description.
> 
> Probably because I was following the lead of the ts2005 description.
> 
> How does this look:
> - reg			: I2C address. 0x48 - 0x4b based on the voltage applied to
> 			  the AD1 and AD0 inputs on the IC.
> 

How about the version below?

Thanks.

-- 
Dmitry


Input: tsc2004 - document ts2004 dt bindings

From: Michael Welling <mwelling@ieee.org>

Adds documentation for the devicetree bindings of the new tsc2004 driver.

Signed-off-by: Michael Welling <mwelling@ieee.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 .../bindings/input/touchscreen/tsc2005.txt         |   34 ++++++++++++++++----
 1 file changed, 28 insertions(+), 6 deletions(-)

diff --git a/Documentation/devicetree/bindings/input/touchscreen/tsc2005.txt b/Documentation/devicetree/bindings/input/touchscreen/tsc2005.txt
index 09089a6..b80c04b 100644
--- a/Documentation/devicetree/bindings/input/touchscreen/tsc2005.txt
+++ b/Documentation/devicetree/bindings/input/touchscreen/tsc2005.txt
@@ -1,14 +1,15 @@
-* Texas Instruments tsc2005 touchscreen controller
+* Texas Instruments tsc2004 and tsc2005 touchscreen controllers
 
 Required properties:
- - compatible		      : "ti,tsc2005"
- - reg			      : SPI device address
- - spi-max-frequency	      : Maximal SPI speed
+ - compatible		      : "ti,tsc2004" or "ti,tsc2005"
+ - reg			      : Device address
  - interrupts		      : IRQ specifier
- - reset-gpios		      : GPIO specifier
- - vio-supply                 : Regulator specifier
+ - spi-max-frequency	      : Maximum SPI clocking speed of the device
+			        (for tsc2005)
 
 Optional properties:
+ - vio-supply		      : Regulator specifier
+ - reset-gpios		      : GPIO specifier for the controller reset line
  - ti,x-plate-ohms	      : integer, resistance of the touchscreen's X plates
 				in ohm (defaults to 280)
  - ti,esd-recovery-timeout-ms : integer, if the touchscreen does not respond after
@@ -18,6 +19,27 @@ Optional properties:
 
 Example:
 
+&i2c3 {
+	tsc2004@48 {
+		compatible = "ti,tsc2004";
+		reg = <0x48>;
+		vio-supply = <&vio>;
+
+		reset-gpios = <&gpio4 8 GPIO_ACTIVE_HIGH>;
+		interrupts-extended = <&gpio1 27 IRQ_TYPE_EDGE_RISING>;
+
+		touchscreen-fuzz-x = <4>;
+		touchscreen-fuzz-y = <7>;
+		touchscreen-fuzz-pressure = <2>;
+		touchscreen-size-x = <4096>;
+		touchscreen-size-y = <4096>;
+		touchscreen-max-pressure = <2048>;
+
+		ti,x-plate-ohms = <280>;
+		ti,esd-recovery-timeout-ms = <8000>;
+	};
+}
+
 &mcspi1 {
 	tsc2005@0 {
 		compatible = "ti,tsc2005";

Re: [PATCH 4/4] Input: tsc2004 - Document ts2004 dt bindings

[Rob Herring]

On Tue, Nov 3, 2015 at 1:21 AM, Dmitry Torokhov
<dmitry.torokhov@gmail.com> wrote:
> On Mon, Nov 02, 2015 at 02:50:29PM -0600, Michael Welling wrote:
>> On Mon, Nov 02, 2015 at 09:19:50AM -0600, Rob Herring wrote:
>> > > +Required properties:
>> > > + - compatible                : "ti,tsc2004"
>> > > + - interrupts                : IRQ specifier
>> > > + - vio-supply                 : Regulator specifier
>> >
>> > reg property?
>>
>> Rob,
>>
>> It appears that I missed this in the description.
>>
>> Probably because I was following the lead of the ts2005 description.
>>
>> How does this look:
>> - reg                 : I2C address. 0x48 - 0x4b based on the voltage applied to
>>                         the AD1 and AD0 inputs on the IC.
>>
>
> How about the version below?
>
> Thanks.
>
> --
> Dmitry
>
>
> Input: tsc2004 - document ts2004 dt bindings
>
> From: Michael Welling <mwelling@ieee.org>
>
> Adds documentation for the devicetree bindings of the new tsc2004 driver.
>
> Signed-off-by: Michael Welling <mwelling@ieee.org>
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Acked-by: Rob Herring <robh@kernel.org>

> ---
>  .../bindings/input/touchscreen/tsc2005.txt         |   34 ++++++++++++++++----
>  1 file changed, 28 insertions(+), 6 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/input/touchscreen/tsc2005.txt b/Documentation/devicetree/bindings/input/touchscreen/tsc2005.txt
> index 09089a6..b80c04b 100644
> --- a/Documentation/devicetree/bindings/input/touchscreen/tsc2005.txt
> +++ b/Documentation/devicetree/bindings/input/touchscreen/tsc2005.txt
> @@ -1,14 +1,15 @@
> -* Texas Instruments tsc2005 touchscreen controller
> +* Texas Instruments tsc2004 and tsc2005 touchscreen controllers
>
>  Required properties:
> - - compatible                : "ti,tsc2005"
> - - reg                       : SPI device address
> - - spi-max-frequency         : Maximal SPI speed
> + - compatible                : "ti,tsc2004" or "ti,tsc2005"
> + - reg                       : Device address
>   - interrupts                : IRQ specifier
> - - reset-gpios               : GPIO specifier
> - - vio-supply                 : Regulator specifier
> + - spi-max-frequency         : Maximum SPI clocking speed of the device
> +                               (for tsc2005)
>
>  Optional properties:
> + - vio-supply                : Regulator specifier
> + - reset-gpios               : GPIO specifier for the controller reset line
>   - ti,x-plate-ohms           : integer, resistance of the touchscreen's X plates
>                                 in ohm (defaults to 280)
>   - ti,esd-recovery-timeout-ms : integer, if the touchscreen does not respond after
> @@ -18,6 +19,27 @@ Optional properties:
>
>  Example:
>
> +&i2c3 {
> +       tsc2004@48 {
> +               compatible = "ti,tsc2004";
> +               reg = <0x48>;
> +               vio-supply = <&vio>;
> +
> +               reset-gpios = <&gpio4 8 GPIO_ACTIVE_HIGH>;
> +               interrupts-extended = <&gpio1 27 IRQ_TYPE_EDGE_RISING>;
> +
> +               touchscreen-fuzz-x = <4>;
> +               touchscreen-fuzz-y = <7>;
> +               touchscreen-fuzz-pressure = <2>;
> +               touchscreen-size-x = <4096>;
> +               touchscreen-size-y = <4096>;
> +               touchscreen-max-pressure = <2048>;
> +
> +               ti,x-plate-ohms = <280>;
> +               ti,esd-recovery-timeout-ms = <8000>;
> +       };
> +}
> +
>  &mcspi1 {
>         tsc2005@0 {
>                 compatible = "ti,tsc2005";

Re: [PATCH 4/4] Input: tsc2004 - Document ts2004 dt bindings

[Michael Welling]

On Tue, Nov 03, 2015 at 09:31:10AM -0600, Rob Herring wrote:
> On Tue, Nov 3, 2015 at 1:21 AM, Dmitry Torokhov
> <dmitry.torokhov@gmail.com> wrote:
> > On Mon, Nov 02, 2015 at 02:50:29PM -0600, Michael Welling wrote:
> >> On Mon, Nov 02, 2015 at 09:19:50AM -0600, Rob Herring wrote:
> >> > > +Required properties:
> >> > > + - compatible                : "ti,tsc2004"
> >> > > + - interrupts                : IRQ specifier
> >> > > + - vio-supply                 : Regulator specifier
> >> >
> >> > reg property?
> >>
> >> Rob,
> >>
> >> It appears that I missed this in the description.
> >>
> >> Probably because I was following the lead of the ts2005 description.
> >>
> >> How does this look:
> >> - reg                 : I2C address. 0x48 - 0x4b based on the voltage applied to
> >>                         the AD1 and AD0 inputs on the IC.
> >>
> >
> > How about the version below?
> >
> > Thanks.
> >
> > --
> > Dmitry
> >
> >
> > Input: tsc2004 - document ts2004 dt bindings

Just noticed that it says ts2004 instead of tsc2004 in the subject.
Otherwise, I am fine with it.

Thanks for the assistance.

Still no acks or reviews for the other patches in the series.
I would like for someone to test the tsc2005 support to see if it still works.

The tsc2004 works very well on the target that I have here.

> >
> > From: Michael Welling <mwelling@ieee.org>
> >
> > Adds documentation for the devicetree bindings of the new tsc2004 driver.
> >
> > Signed-off-by: Michael Welling <mwelling@ieee.org>
> > Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> 
> Acked-by: Rob Herring <robh@kernel.org>
> 
> > ---
> >  .../bindings/input/touchscreen/tsc2005.txt         |   34 ++++++++++++++++----
> >  1 file changed, 28 insertions(+), 6 deletions(-)
> >
> > diff --git a/Documentation/devicetree/bindings/input/touchscreen/tsc2005.txt b/Documentation/devicetree/bindings/input/touchscreen/tsc2005.txt
> > index 09089a6..b80c04b 100644
> > --- a/Documentation/devicetree/bindings/input/touchscreen/tsc2005.txt
> > +++ b/Documentation/devicetree/bindings/input/touchscreen/tsc2005.txt
> > @@ -1,14 +1,15 @@
> > -* Texas Instruments tsc2005 touchscreen controller
> > +* Texas Instruments tsc2004 and tsc2005 touchscreen controllers
> >
> >  Required properties:
> > - - compatible                : "ti,tsc2005"
> > - - reg                       : SPI device address
> > - - spi-max-frequency         : Maximal SPI speed
> > + - compatible                : "ti,tsc2004" or "ti,tsc2005"
> > + - reg                       : Device address
> >   - interrupts                : IRQ specifier
> > - - reset-gpios               : GPIO specifier
> > - - vio-supply                 : Regulator specifier
> > + - spi-max-frequency         : Maximum SPI clocking speed of the device
> > +                               (for tsc2005)
> >
> >  Optional properties:
> > + - vio-supply                : Regulator specifier
> > + - reset-gpios               : GPIO specifier for the controller reset line
> >   - ti,x-plate-ohms           : integer, resistance of the touchscreen's X plates
> >                                 in ohm (defaults to 280)
> >   - ti,esd-recovery-timeout-ms : integer, if the touchscreen does not respond after
> > @@ -18,6 +19,27 @@ Optional properties:
> >
> >  Example:
> >
> > +&i2c3 {
> > +       tsc2004@48 {
> > +               compatible = "ti,tsc2004";
> > +               reg = <0x48>;
> > +               vio-supply = <&vio>;
> > +
> > +               reset-gpios = <&gpio4 8 GPIO_ACTIVE_HIGH>;
> > +               interrupts-extended = <&gpio1 27 IRQ_TYPE_EDGE_RISING>;
> > +
> > +               touchscreen-fuzz-x = <4>;
> > +               touchscreen-fuzz-y = <7>;
> > +               touchscreen-fuzz-pressure = <2>;
> > +               touchscreen-size-x = <4096>;
> > +               touchscreen-size-y = <4096>;
> > +               touchscreen-max-pressure = <2048>;
> > +
> > +               ti,x-plate-ohms = <280>;
> > +               ti,esd-recovery-timeout-ms = <8000>;
> > +       };
> > +}
> > +
> >  &mcspi1 {
> >         tsc2005@0 {
> >                 compatible = "ti,tsc2005";

Re: [PATCH 1/4] Input: tsc2005 - Separate SPI and core functions

[Michael Welling]

On Mon, Nov 02, 2015 at 05:49:46PM -0800, Dmitry Torokhov wrote:
> On Fri, Oct 30, 2015 at 07:41:23PM -0500, Michael Welling wrote:
> > This patch separates the SPI functionality from core functionality
> > that overlaps with the tsc2004.
> > 
> > Prepares kernel for new tsc2004 driver without much redundant code.
> > 
> > Signed-off-by: Michael Welling <mwelling@ieee.org>
> > ---
> >  drivers/input/touchscreen/Kconfig                  |   4 +
> >  drivers/input/touchscreen/Makefile                 |   1 +
> >  drivers/input/touchscreen/tsc2005.c                | 709 +--------------------
> >  .../touchscreen/{tsc2005.c => tsc200x-core.c}      | 226 ++-----
> >  drivers/input/touchscreen/tsc200x-core.h           |  78 +++
> >  5 files changed, 162 insertions(+), 856 deletions(-)
> >  copy drivers/input/touchscreen/{tsc2005.c => tsc200x-core.c} (72%)
> >  create mode 100644 drivers/input/touchscreen/tsc200x-core.h
> 
> This was giving me:
> 
> Kernel: arch/x86/boot/bzImage is ready  (#1451)
>   MODPOST 1447 modules
> ERROR: "tsc200x_regmap_config" [drivers/input/touchscreen/tsc2005.ko] undefined!
> make[1]: *** [__modpost] Error 1
> make: *** [modules] Error 2
> 
> I'll fix it up locally by exporting the symbol.
> 
> Thanks.

Ooops. I guess that I need to check more thoroughly the different configs.

Thanks for your help.

> 
> -- 
> Dmitry

Re: [PATCH 4/4] Input: tsc2004 - Document ts2004 dt bindings

[Dmitry Torokhov]

On Tue, Nov 03, 2015 at 09:41:17AM -0600, Michael Welling wrote:
> On Tue, Nov 03, 2015 at 09:31:10AM -0600, Rob Herring wrote:
> > On Tue, Nov 3, 2015 at 1:21 AM, Dmitry Torokhov
> > <dmitry.torokhov@gmail.com> wrote:
> > > On Mon, Nov 02, 2015 at 02:50:29PM -0600, Michael Welling wrote:
> > >> On Mon, Nov 02, 2015 at 09:19:50AM -0600, Rob Herring wrote:
> > >> > > +Required properties:
> > >> > > + - compatible                : "ti,tsc2004"
> > >> > > + - interrupts                : IRQ specifier
> > >> > > + - vio-supply                 : Regulator specifier
> > >> >
> > >> > reg property?
> > >>
> > >> Rob,
> > >>
> > >> It appears that I missed this in the description.
> > >>
> > >> Probably because I was following the lead of the ts2005 description.
> > >>
> > >> How does this look:
> > >> - reg                 : I2C address. 0x48 - 0x4b based on the voltage applied to
> > >>                         the AD1 and AD0 inputs on the IC.
> > >>
> > >
> > > How about the version below?
> > >
> > > Thanks.
> > >
> > > --
> > > Dmitry
> > >
> > >
> > > Input: tsc2004 - document ts2004 dt bindings
> 
> Just noticed that it says ts2004 instead of tsc2004 in the subject.
> Otherwise, I am fine with it.
> 
> Thanks for the assistance.
> 
> Still no acks or reviews for the other patches in the series.
> I would like for someone to test the tsc2005 support to see if it still works.
> 
> The tsc2004 works very well on the target that I have here.

I folded this patch into the patch #3 and applied everything.

Thanks!

-- 
Dmitry

Re: [PATCH 4/4] Input: tsc2004 - Document ts2004 dt bindings

[Michael Welling]

On Tue, Nov 03, 2015 at 02:59:13PM -0800, Dmitry Torokhov wrote:
> On Tue, Nov 03, 2015 at 09:41:17AM -0600, Michael Welling wrote:
> > On Tue, Nov 03, 2015 at 09:31:10AM -0600, Rob Herring wrote:
> > > On Tue, Nov 3, 2015 at 1:21 AM, Dmitry Torokhov
> > > <dmitry.torokhov@gmail.com> wrote:
> > > > On Mon, Nov 02, 2015 at 02:50:29PM -0600, Michael Welling wrote:
> > > >> On Mon, Nov 02, 2015 at 09:19:50AM -0600, Rob Herring wrote:
> > > >> > > +Required properties:
> > > >> > > + - compatible                : "ti,tsc2004"
> > > >> > > + - interrupts                : IRQ specifier
> > > >> > > + - vio-supply                 : Regulator specifier
> > > >> >
> > > >> > reg property?
> > > >>
> > > >> Rob,
> > > >>
> > > >> It appears that I missed this in the description.
> > > >>
> > > >> Probably because I was following the lead of the ts2005 description.
> > > >>
> > > >> How does this look:
> > > >> - reg                 : I2C address. 0x48 - 0x4b based on the voltage applied to
> > > >>                         the AD1 and AD0 inputs on the IC.
> > > >>
> > > >
> > > > How about the version below?
> > > >
> > > > Thanks.
> > > >
> > > > --
> > > > Dmitry
> > > >
> > > >
> > > > Input: tsc2004 - document ts2004 dt bindings
> > 
> > Just noticed that it says ts2004 instead of tsc2004 in the subject.
> > Otherwise, I am fine with it.
> > 
> > Thanks for the assistance.
> > 
> > Still no acks or reviews for the other patches in the series.
> > I would like for someone to test the tsc2005 support to see if it still works.
> > 
> > The tsc2004 works very well on the target that I have here.
> 
> I folded this patch into the patch #3 and applied everything.
>

Great.

Will this patch series conflict with the patch series to take out the .owner=THIS_MODULE
from spi_drivers?

https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1004626.html
 
> Thanks!
> 
> -- 
> Dmitry

Re: [PATCH 4/4] Input: tsc2004 - Document ts2004 dt bindings

[Dmitry Torokhov]

On Tue, Nov 03, 2015 at 05:11:56PM -0600, Michael Welling wrote:
> On Tue, Nov 03, 2015 at 02:59:13PM -0800, Dmitry Torokhov wrote:
> > On Tue, Nov 03, 2015 at 09:41:17AM -0600, Michael Welling wrote:
> > > On Tue, Nov 03, 2015 at 09:31:10AM -0600, Rob Herring wrote:
> > > > On Tue, Nov 3, 2015 at 1:21 AM, Dmitry Torokhov
> > > > <dmitry.torokhov@gmail.com> wrote:
> > > > > On Mon, Nov 02, 2015 at 02:50:29PM -0600, Michael Welling wrote:
> > > > >> On Mon, Nov 02, 2015 at 09:19:50AM -0600, Rob Herring wrote:
> > > > >> > > +Required properties:
> > > > >> > > + - compatible                : "ti,tsc2004"
> > > > >> > > + - interrupts                : IRQ specifier
> > > > >> > > + - vio-supply                 : Regulator specifier
> > > > >> >
> > > > >> > reg property?
> > > > >>
> > > > >> Rob,
> > > > >>
> > > > >> It appears that I missed this in the description.
> > > > >>
> > > > >> Probably because I was following the lead of the ts2005 description.
> > > > >>
> > > > >> How does this look:
> > > > >> - reg                 : I2C address. 0x48 - 0x4b based on the voltage applied to
> > > > >>                         the AD1 and AD0 inputs on the IC.
> > > > >>
> > > > >
> > > > > How about the version below?
> > > > >
> > > > > Thanks.
> > > > >
> > > > > --
> > > > > Dmitry
> > > > >
> > > > >
> > > > > Input: tsc2004 - document ts2004 dt bindings
> > > 
> > > Just noticed that it says ts2004 instead of tsc2004 in the subject.
> > > Otherwise, I am fine with it.
> > > 
> > > Thanks for the assistance.
> > > 
> > > Still no acks or reviews for the other patches in the series.
> > > I would like for someone to test the tsc2005 support to see if it still works.
> > > 
> > > The tsc2004 works very well on the target that I have here.
> > 
> > I folded this patch into the patch #3 and applied everything.
> >
> 
> Great.
> 
> Will this patch series conflict with the patch series to take out the .owner=THIS_MODULE
> from spi_drivers?
> 
> https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1004626.html

If he tries to get them in one pass - probably, but the conflicts should
be trivial and should be easily resolved by SPI maintainer and/or Linus.

Or he could split the patch per-subsystem.

Thanks.

-- 
Dmitry