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linux/drivers/input/touchscreen/bu21013_ts.c
Guenter Roeck 8e1b4d83cf Input: touchscreen - drop unnecessary calls to device_init_wakeup 
Calling device_init_wakeup in the remove function is unnecessary since the
device is going away, and thus won't be able to cause any wakeups under any
circumstances. Besides, the driver cleanup code already handles the
necessary cleanup.

Similarly, disabling wakeup in the probe error path is unnecessary, as is
disabling wakeup in the probe function in the first place.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2017-01-21 23:53:30 -08:00

731 lines
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/*
* Copyright (C) ST-Ericsson SA 2010
* Author: Naveen Kumar G <naveen.gaddipati@stericsson.com> for ST-Ericsson
* License terms:GNU General Public License (GPL) version 2
*/
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/workqueue.h>
#include <linux/input.h>
#include <linux/input/bu21013.h>
#include <linux/slab.h>
#include <linux/regulator/consumer.h>
#include <linux/module.h>
#include <linux/gpio.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#define PEN_DOWN_INTR 0
#define MAX_FINGERS 2
#define RESET_DELAY 30
#define PENUP_TIMEOUT (10)
#define DELTA_MIN 16
#define MASK_BITS 0x03
#define SHIFT_8 8
#define SHIFT_2 2
#define LENGTH_OF_BUFFER 11
#define I2C_RETRY_COUNT 5
#define BU21013_SENSORS_BTN_0_7_REG 0x70
#define BU21013_SENSORS_BTN_8_15_REG 0x71
#define BU21013_SENSORS_BTN_16_23_REG 0x72
#define BU21013_X1_POS_MSB_REG 0x73
#define BU21013_X1_POS_LSB_REG 0x74
#define BU21013_Y1_POS_MSB_REG 0x75
#define BU21013_Y1_POS_LSB_REG 0x76
#define BU21013_X2_POS_MSB_REG 0x77
#define BU21013_X2_POS_LSB_REG 0x78
#define BU21013_Y2_POS_MSB_REG 0x79
#define BU21013_Y2_POS_LSB_REG 0x7A
#define BU21013_INT_CLR_REG 0xE8
#define BU21013_INT_MODE_REG 0xE9
#define BU21013_GAIN_REG 0xEA
#define BU21013_OFFSET_MODE_REG 0xEB
#define BU21013_XY_EDGE_REG 0xEC
#define BU21013_RESET_REG 0xED
#define BU21013_CALIB_REG 0xEE
#define BU21013_DONE_REG 0xEF
#define BU21013_SENSOR_0_7_REG 0xF0
#define BU21013_SENSOR_8_15_REG 0xF1
#define BU21013_SENSOR_16_23_REG 0xF2
#define BU21013_POS_MODE1_REG 0xF3
#define BU21013_POS_MODE2_REG 0xF4
#define BU21013_CLK_MODE_REG 0xF5
#define BU21013_IDLE_REG 0xFA
#define BU21013_FILTER_REG 0xFB
#define BU21013_TH_ON_REG 0xFC
#define BU21013_TH_OFF_REG 0xFD
#define BU21013_RESET_ENABLE 0x01
#define BU21013_SENSORS_EN_0_7 0x3F
#define BU21013_SENSORS_EN_8_15 0xFC
#define BU21013_SENSORS_EN_16_23 0x1F
#define BU21013_POS_MODE1_0 0x02
#define BU21013_POS_MODE1_1 0x04
#define BU21013_POS_MODE1_2 0x08
#define BU21013_POS_MODE2_ZERO 0x01
#define BU21013_POS_MODE2_AVG1 0x02
#define BU21013_POS_MODE2_AVG2 0x04
#define BU21013_POS_MODE2_EN_XY 0x08
#define BU21013_POS_MODE2_EN_RAW 0x10
#define BU21013_POS_MODE2_MULTI 0x80
#define BU21013_CLK_MODE_DIV 0x01
#define BU21013_CLK_MODE_EXT 0x02
#define BU21013_CLK_MODE_CALIB 0x80
#define BU21013_IDLET_0 0x01
#define BU21013_IDLET_1 0x02
#define BU21013_IDLET_2 0x04
#define BU21013_IDLET_3 0x08
#define BU21013_IDLE_INTERMIT_EN 0x10
#define BU21013_DELTA_0_6 0x7F
#define BU21013_FILTER_EN 0x80
#define BU21013_INT_MODE_LEVEL 0x00
#define BU21013_INT_MODE_EDGE 0x01
#define BU21013_GAIN_0 0x01
#define BU21013_GAIN_1 0x02
#define BU21013_GAIN_2 0x04
#define BU21013_OFFSET_MODE_DEFAULT 0x00
#define BU21013_OFFSET_MODE_MOVE 0x01
#define BU21013_OFFSET_MODE_DISABLE 0x02
#define BU21013_TH_ON_0 0x01
#define BU21013_TH_ON_1 0x02
#define BU21013_TH_ON_2 0x04
#define BU21013_TH_ON_3 0x08
#define BU21013_TH_ON_4 0x10
#define BU21013_TH_ON_5 0x20
#define BU21013_TH_ON_6 0x40
#define BU21013_TH_ON_7 0x80
#define BU21013_TH_ON_MAX 0xFF
#define BU21013_TH_OFF_0 0x01
#define BU21013_TH_OFF_1 0x02
#define BU21013_TH_OFF_2 0x04
#define BU21013_TH_OFF_3 0x08
#define BU21013_TH_OFF_4 0x10
#define BU21013_TH_OFF_5 0x20
#define BU21013_TH_OFF_6 0x40
#define BU21013_TH_OFF_7 0x80
#define BU21013_TH_OFF_MAX 0xFF
#define BU21013_X_EDGE_0 0x01
#define BU21013_X_EDGE_1 0x02
#define BU21013_X_EDGE_2 0x04
#define BU21013_X_EDGE_3 0x08
#define BU21013_Y_EDGE_0 0x10
#define BU21013_Y_EDGE_1 0x20
#define BU21013_Y_EDGE_2 0x40
#define BU21013_Y_EDGE_3 0x80
#define BU21013_DONE 0x01
#define BU21013_NUMBER_OF_X_SENSORS (6)
#define BU21013_NUMBER_OF_Y_SENSORS (11)
#define DRIVER_TP "bu21013_tp"
/**
* struct bu21013_ts_data - touch panel data structure
* @client: pointer to the i2c client
* @wait: variable to wait_queue_head_t structure
* @touch_stopped: touch stop flag
* @chip: pointer to the touch panel controller
* @in_dev: pointer to the input device structure
* @intr_pin: interrupt pin value
* @regulator: pointer to the Regulator used for touch screen
*
* Touch panel device data structure
*/
struct bu21013_ts_data {
struct i2c_client *client;
wait_queue_head_t wait;
const struct bu21013_platform_device *chip;
struct input_dev *in_dev;
struct regulator *regulator;
unsigned int irq;
unsigned int intr_pin;
bool touch_stopped;
};
/**
* bu21013_read_block_data(): read the touch co-ordinates
* @data: bu21013_ts_data structure pointer
* @buf: byte pointer
*
* Read the touch co-ordinates using i2c read block into buffer
* and returns integer.
*/
static int bu21013_read_block_data(struct bu21013_ts_data *data, u8 *buf)
{
int ret, i;
for (i = 0; i < I2C_RETRY_COUNT; i++) {
ret = i2c_smbus_read_i2c_block_data
(data->client, BU21013_SENSORS_BTN_0_7_REG,
LENGTH_OF_BUFFER, buf);
if (ret == LENGTH_OF_BUFFER)
return 0;
}
return -EINVAL;
}
/**
* bu21013_do_touch_report(): Get the touch co-ordinates
* @data: bu21013_ts_data structure pointer
*
* Get the touch co-ordinates from touch sensor registers and writes
* into device structure and returns integer.
*/
static int bu21013_do_touch_report(struct bu21013_ts_data *data)
{
u8 buf[LENGTH_OF_BUFFER];
unsigned int pos_x[2], pos_y[2];
bool has_x_sensors, has_y_sensors;
int finger_down_count = 0;
int i;
if (data == NULL)
return -EINVAL;
if (bu21013_read_block_data(data, buf) < 0)
return -EINVAL;
has_x_sensors = hweight32(buf[0] & BU21013_SENSORS_EN_0_7);
has_y_sensors = hweight32(((buf[1] & BU21013_SENSORS_EN_8_15) |
((buf[2] & BU21013_SENSORS_EN_16_23) << SHIFT_8)) >> SHIFT_2);
if (!has_x_sensors || !has_y_sensors)
return 0;
for (i = 0; i < MAX_FINGERS; i++) {
const u8 *p = &buf[4 * i + 3];
unsigned int x = p[0] << SHIFT_2 | (p[1] & MASK_BITS);
unsigned int y = p[2] << SHIFT_2 | (p[3] & MASK_BITS);
if (x == 0 || y == 0)
continue;
pos_x[finger_down_count] = x;
pos_y[finger_down_count] = y;
finger_down_count++;
}
if (finger_down_count) {
if (finger_down_count == 2 &&
(abs(pos_x[0] - pos_x[1]) < DELTA_MIN ||
abs(pos_y[0] - pos_y[1]) < DELTA_MIN)) {
return 0;
}
for (i = 0; i < finger_down_count; i++) {
if (data->chip->x_flip)
pos_x[i] = data->chip->touch_x_max - pos_x[i];
if (data->chip->y_flip)
pos_y[i] = data->chip->touch_y_max - pos_y[i];
input_report_abs(data->in_dev,
ABS_MT_POSITION_X, pos_x[i]);
input_report_abs(data->in_dev,
ABS_MT_POSITION_Y, pos_y[i]);
input_mt_sync(data->in_dev);
}
} else
input_mt_sync(data->in_dev);
input_sync(data->in_dev);
return 0;
}
/**
* bu21013_gpio_irq() - gpio thread function for touch interrupt
* @irq: irq value
* @device_data: void pointer
*
* This gpio thread function for touch interrupt
* and returns irqreturn_t.
*/
static irqreturn_t bu21013_gpio_irq(int irq, void *device_data)
{
struct bu21013_ts_data *data = device_data;
struct i2c_client *i2c = data->client;
int retval;
do {
retval = bu21013_do_touch_report(data);
if (retval < 0) {
dev_err(&i2c->dev, "bu21013_do_touch_report failed\n");
return IRQ_NONE;
}
data->intr_pin = gpio_get_value(data->chip->touch_pin);
if (data->intr_pin == PEN_DOWN_INTR)
wait_event_timeout(data->wait, data->touch_stopped,
msecs_to_jiffies(2));
} while (!data->intr_pin && !data->touch_stopped);
return IRQ_HANDLED;
}
/**
* bu21013_init_chip() - power on sequence for the bu21013 controller
* @data: device structure pointer
*
* This function is used to power on
* the bu21013 controller and returns integer.
*/
static int bu21013_init_chip(struct bu21013_ts_data *data)
{
int retval;
struct i2c_client *i2c = data->client;
retval = i2c_smbus_write_byte_data(i2c, BU21013_RESET_REG,
BU21013_RESET_ENABLE);
if (retval < 0) {
dev_err(&i2c->dev, "BU21013_RESET reg write failed\n");
return retval;
}
msleep(RESET_DELAY);
retval = i2c_smbus_write_byte_data(i2c, BU21013_SENSOR_0_7_REG,
BU21013_SENSORS_EN_0_7);
if (retval < 0) {
dev_err(&i2c->dev, "BU21013_SENSOR_0_7 reg write failed\n");
return retval;
}
retval = i2c_smbus_write_byte_data(i2c, BU21013_SENSOR_8_15_REG,
BU21013_SENSORS_EN_8_15);
if (retval < 0) {
dev_err(&i2c->dev, "BU21013_SENSOR_8_15 reg write failed\n");
return retval;
}
retval = i2c_smbus_write_byte_data(i2c, BU21013_SENSOR_16_23_REG,
BU21013_SENSORS_EN_16_23);
if (retval < 0) {
dev_err(&i2c->dev, "BU21013_SENSOR_16_23 reg write failed\n");
return retval;
}
retval = i2c_smbus_write_byte_data(i2c, BU21013_POS_MODE1_REG,
(BU21013_POS_MODE1_0 | BU21013_POS_MODE1_1));
if (retval < 0) {
dev_err(&i2c->dev, "BU21013_POS_MODE1 reg write failed\n");
return retval;
}
retval = i2c_smbus_write_byte_data(i2c, BU21013_POS_MODE2_REG,
(BU21013_POS_MODE2_ZERO | BU21013_POS_MODE2_AVG1 |
BU21013_POS_MODE2_AVG2 | BU21013_POS_MODE2_EN_RAW |
BU21013_POS_MODE2_MULTI));
if (retval < 0) {
dev_err(&i2c->dev, "BU21013_POS_MODE2 reg write failed\n");
return retval;
}
if (data->chip->ext_clk)
retval = i2c_smbus_write_byte_data(i2c, BU21013_CLK_MODE_REG,
(BU21013_CLK_MODE_EXT | BU21013_CLK_MODE_CALIB));
else
retval = i2c_smbus_write_byte_data(i2c, BU21013_CLK_MODE_REG,
(BU21013_CLK_MODE_DIV | BU21013_CLK_MODE_CALIB));
if (retval < 0) {
dev_err(&i2c->dev, "BU21013_CLK_MODE reg write failed\n");
return retval;
}
retval = i2c_smbus_write_byte_data(i2c, BU21013_IDLE_REG,
(BU21013_IDLET_0 | BU21013_IDLE_INTERMIT_EN));
if (retval < 0) {
dev_err(&i2c->dev, "BU21013_IDLE reg write failed\n");
return retval;
}
retval = i2c_smbus_write_byte_data(i2c, BU21013_INT_MODE_REG,
BU21013_INT_MODE_LEVEL);
if (retval < 0) {
dev_err(&i2c->dev, "BU21013_INT_MODE reg write failed\n");
return retval;
}
retval = i2c_smbus_write_byte_data(i2c, BU21013_FILTER_REG,
(BU21013_DELTA_0_6 |
BU21013_FILTER_EN));
if (retval < 0) {
dev_err(&i2c->dev, "BU21013_FILTER reg write failed\n");
return retval;
}
retval = i2c_smbus_write_byte_data(i2c, BU21013_TH_ON_REG,
BU21013_TH_ON_5);
if (retval < 0) {
dev_err(&i2c->dev, "BU21013_TH_ON reg write failed\n");
return retval;
}
retval = i2c_smbus_write_byte_data(i2c, BU21013_TH_OFF_REG,
BU21013_TH_OFF_4 | BU21013_TH_OFF_3);
if (retval < 0) {
dev_err(&i2c->dev, "BU21013_TH_OFF reg write failed\n");
return retval;
}
retval = i2c_smbus_write_byte_data(i2c, BU21013_GAIN_REG,
(BU21013_GAIN_0 | BU21013_GAIN_1));
if (retval < 0) {
dev_err(&i2c->dev, "BU21013_GAIN reg write failed\n");
return retval;
}
retval = i2c_smbus_write_byte_data(i2c, BU21013_OFFSET_MODE_REG,
BU21013_OFFSET_MODE_DEFAULT);
if (retval < 0) {
dev_err(&i2c->dev, "BU21013_OFFSET_MODE reg write failed\n");
return retval;
}
retval = i2c_smbus_write_byte_data(i2c, BU21013_XY_EDGE_REG,
(BU21013_X_EDGE_0 | BU21013_X_EDGE_2 |
BU21013_Y_EDGE_1 | BU21013_Y_EDGE_3));
if (retval < 0) {
dev_err(&i2c->dev, "BU21013_XY_EDGE reg write failed\n");
return retval;
}
retval = i2c_smbus_write_byte_data(i2c, BU21013_DONE_REG,
BU21013_DONE);
if (retval < 0) {
dev_err(&i2c->dev, "BU21013_REG_DONE reg write failed\n");
return retval;
}
return 0;
}
/**
* bu21013_free_irq() - frees IRQ registered for touchscreen
* @bu21013_data: device structure pointer
*
* This function signals interrupt thread to stop processing and
* frees interrupt.
*/
static void bu21013_free_irq(struct bu21013_ts_data *bu21013_data)
{
bu21013_data->touch_stopped = true;
wake_up(&bu21013_data->wait);
free_irq(bu21013_data->irq, bu21013_data);
}
/**
* bu21013_cs_disable() - deconfigures the touch panel controller
* @bu21013_data: device structure pointer
*
* This function is used to deconfigure the chip selection
* for touch panel controller.
*/
static void bu21013_cs_disable(struct bu21013_ts_data *bu21013_data)
{
int error;
error = gpio_direction_output(bu21013_data->chip->cs_pin, 0);
if (error < 0)
dev_warn(&bu21013_data->client->dev,
"%s: gpio direction failed, error: %d\n",
__func__, error);
else
gpio_set_value(bu21013_data->chip->cs_pin, 0);
gpio_free(bu21013_data->chip->cs_pin);
}
#ifdef CONFIG_OF
static const struct bu21013_platform_device *
bu21013_parse_dt(struct device *dev)
{
struct device_node *np = dev->of_node;
struct bu21013_platform_device *pdata;
if (!np) {
dev_err(dev, "no device tree or platform data\n");
return ERR_PTR(-EINVAL);
}
pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return ERR_PTR(-ENOMEM);
pdata->y_flip = pdata->x_flip = false;
pdata->x_flip = of_property_read_bool(np, "rohm,flip-x");
pdata->y_flip = of_property_read_bool(np, "rohm,flip-y");
of_property_read_u32(np, "rohm,touch-max-x", &pdata->touch_x_max);
of_property_read_u32(np, "rohm,touch-max-y", &pdata->touch_y_max);
pdata->touch_pin = of_get_named_gpio(np, "touch-gpio", 0);
pdata->cs_pin = of_get_named_gpio(np, "reset-gpio", 0);
pdata->ext_clk = false;
return pdata;
}
#else
static inline const struct bu21013_platform_device *
bu21013_parse_dt(struct device *dev)
{
dev_err(dev, "no platform data available\n");
return ERR_PTR(-EINVAL);
}
#endif
/**
* bu21013_probe() - initializes the i2c-client touchscreen driver
* @client: i2c client structure pointer
* @id: i2c device id pointer
*
* This function used to initializes the i2c-client touchscreen
* driver and returns integer.
*/
static int bu21013_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
const struct bu21013_platform_device *pdata =
dev_get_platdata(&client->dev);
struct bu21013_ts_data *bu21013_data;
struct input_dev *in_dev;
int error;
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_BYTE_DATA)) {
dev_err(&client->dev, "i2c smbus byte data not supported\n");
return -EIO;
}
if (!pdata) {
pdata = bu21013_parse_dt(&client->dev);
if (IS_ERR(pdata))
return PTR_ERR(pdata);
}
if (!gpio_is_valid(pdata->touch_pin)) {
dev_err(&client->dev, "invalid touch_pin supplied\n");
return -EINVAL;
}
bu21013_data = kzalloc(sizeof(struct bu21013_ts_data), GFP_KERNEL);
in_dev = input_allocate_device();
if (!bu21013_data || !in_dev) {
dev_err(&client->dev, "device memory alloc failed\n");
error = -ENOMEM;
goto err_free_mem;
}
bu21013_data->in_dev = in_dev;
bu21013_data->chip = pdata;
bu21013_data->client = client;
bu21013_data->irq = gpio_to_irq(pdata->touch_pin);
bu21013_data->regulator = regulator_get(&client->dev, "avdd");
if (IS_ERR(bu21013_data->regulator)) {
dev_err(&client->dev, "regulator_get failed\n");
error = PTR_ERR(bu21013_data->regulator);
goto err_free_mem;
}
error = regulator_enable(bu21013_data->regulator);
if (error < 0) {
dev_err(&client->dev, "regulator enable failed\n");
goto err_put_regulator;
}
bu21013_data->touch_stopped = false;
init_waitqueue_head(&bu21013_data->wait);
/* configure the gpio pins */
error = gpio_request_one(pdata->cs_pin, GPIOF_OUT_INIT_HIGH,
"touchp_reset");
if (error < 0) {
dev_err(&client->dev, "Unable to request gpio reset_pin\n");
goto err_disable_regulator;
}
/* configure the touch panel controller */
error = bu21013_init_chip(bu21013_data);
if (error) {
dev_err(&client->dev, "error in bu21013 config\n");
goto err_cs_disable;
}
/* register the device to input subsystem */
in_dev->name = DRIVER_TP;
in_dev->id.bustype = BUS_I2C;
in_dev->dev.parent = &client->dev;
__set_bit(EV_SYN, in_dev->evbit);
__set_bit(EV_KEY, in_dev->evbit);
__set_bit(EV_ABS, in_dev->evbit);
input_set_abs_params(in_dev, ABS_MT_POSITION_X, 0,
pdata->touch_x_max, 0, 0);
input_set_abs_params(in_dev, ABS_MT_POSITION_Y, 0,
pdata->touch_y_max, 0, 0);
input_set_drvdata(in_dev, bu21013_data);
error = request_threaded_irq(bu21013_data->irq, NULL, bu21013_gpio_irq,
IRQF_TRIGGER_FALLING | IRQF_SHARED |
IRQF_ONESHOT,
DRIVER_TP, bu21013_data);
if (error) {
dev_err(&client->dev, "request irq %d failed\n",
bu21013_data->irq);
goto err_cs_disable;
}
error = input_register_device(in_dev);
if (error) {
dev_err(&client->dev, "failed to register input device\n");
goto err_free_irq;
}
device_init_wakeup(&client->dev, pdata->wakeup);
i2c_set_clientdata(client, bu21013_data);
return 0;
err_free_irq:
bu21013_free_irq(bu21013_data);
err_cs_disable:
bu21013_cs_disable(bu21013_data);
err_disable_regulator:
regulator_disable(bu21013_data->regulator);
err_put_regulator:
regulator_put(bu21013_data->regulator);
err_free_mem:
input_free_device(in_dev);
kfree(bu21013_data);
return error;
}
/**
* bu21013_remove() - removes the i2c-client touchscreen driver
* @client: i2c client structure pointer
*
* This function uses to remove the i2c-client
* touchscreen driver and returns integer.
*/
static int bu21013_remove(struct i2c_client *client)
{
struct bu21013_ts_data *bu21013_data = i2c_get_clientdata(client);
bu21013_free_irq(bu21013_data);
bu21013_cs_disable(bu21013_data);
input_unregister_device(bu21013_data->in_dev);
regulator_disable(bu21013_data->regulator);
regulator_put(bu21013_data->regulator);
kfree(bu21013_data);
return 0;
}
#ifdef CONFIG_PM
/**
* bu21013_suspend() - suspend the touch screen controller
* @dev: pointer to device structure
*
* This function is used to suspend the
* touch panel controller and returns integer
*/
static int bu21013_suspend(struct device *dev)
{
struct bu21013_ts_data *bu21013_data = dev_get_drvdata(dev);
struct i2c_client *client = bu21013_data->client;
bu21013_data->touch_stopped = true;
if (device_may_wakeup(&client->dev))
enable_irq_wake(bu21013_data->irq);
else
disable_irq(bu21013_data->irq);
regulator_disable(bu21013_data->regulator);
return 0;
}
/**
* bu21013_resume() - resume the touch screen controller
* @dev: pointer to device structure
*
* This function is used to resume the touch panel
* controller and returns integer.
*/
static int bu21013_resume(struct device *dev)
{
struct bu21013_ts_data *bu21013_data = dev_get_drvdata(dev);
struct i2c_client *client = bu21013_data->client;
int retval;
retval = regulator_enable(bu21013_data->regulator);
if (retval < 0) {
dev_err(&client->dev, "bu21013 regulator enable failed\n");
return retval;
}
retval = bu21013_init_chip(bu21013_data);
if (retval < 0) {
dev_err(&client->dev, "bu21013 controller config failed\n");
return retval;
}
bu21013_data->touch_stopped = false;
if (device_may_wakeup(&client->dev))
disable_irq_wake(bu21013_data->irq);
else
enable_irq(bu21013_data->irq);
return 0;
}
static const struct dev_pm_ops bu21013_dev_pm_ops = {
.suspend = bu21013_suspend,
.resume = bu21013_resume,
};
#endif
static const struct i2c_device_id bu21013_id[] = {
{ DRIVER_TP, 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, bu21013_id);
static struct i2c_driver bu21013_driver = {
.driver = {
.name = DRIVER_TP,
#ifdef CONFIG_PM
.pm = &bu21013_dev_pm_ops,
#endif
},
.probe = bu21013_probe,
.remove = bu21013_remove,
.id_table = bu21013_id,
};
module_i2c_driver(bu21013_driver);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Naveen Kumar G <naveen.gaddipati@stericsson.com>");
MODULE_DESCRIPTION("bu21013 touch screen controller driver");
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