linux-sg2042/drivers/input/mouse/synaptics_i2c.c

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/*
* Synaptics touchpad with I2C interface
*
* Copyright (C) 2009 Compulab, Ltd.
* Mike Rapoport <mike@compulab.co.il>
* Igor Grinberg <grinberg@compulab.co.il>
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive for
* more details.
*/
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/input.h>
#include <linux/delay.h>
#include <linux/workqueue.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 16:04:11 +08:00
#include <linux/slab.h>
#include <linux/pm.h>
#define DRIVER_NAME "synaptics_i2c"
/* maximum product id is 15 characters */
#define PRODUCT_ID_LENGTH 15
#define REGISTER_LENGTH 8
/*
* after soft reset, we should wait for 1 ms
* before the device becomes operational
*/
#define SOFT_RESET_DELAY_MS 3
/* and after hard reset, we should wait for max 500ms */
#define HARD_RESET_DELAY_MS 500
/* Registers by SMBus address */
#define PAGE_SEL_REG 0xff
#define DEVICE_STATUS_REG 0x09
/* Registers by RMI address */
#define DEV_CONTROL_REG 0x0000
#define INTERRUPT_EN_REG 0x0001
#define ERR_STAT_REG 0x0002
#define INT_REQ_STAT_REG 0x0003
#define DEV_COMMAND_REG 0x0004
#define RMI_PROT_VER_REG 0x0200
#define MANUFACT_ID_REG 0x0201
#define PHYS_INT_VER_REG 0x0202
#define PROD_PROPERTY_REG 0x0203
#define INFO_QUERY_REG0 0x0204
#define INFO_QUERY_REG1 (INFO_QUERY_REG0 + 1)
#define INFO_QUERY_REG2 (INFO_QUERY_REG0 + 2)
#define INFO_QUERY_REG3 (INFO_QUERY_REG0 + 3)
#define PRODUCT_ID_REG0 0x0210
#define PRODUCT_ID_REG1 (PRODUCT_ID_REG0 + 1)
#define PRODUCT_ID_REG2 (PRODUCT_ID_REG0 + 2)
#define PRODUCT_ID_REG3 (PRODUCT_ID_REG0 + 3)
#define PRODUCT_ID_REG4 (PRODUCT_ID_REG0 + 4)
#define PRODUCT_ID_REG5 (PRODUCT_ID_REG0 + 5)
#define PRODUCT_ID_REG6 (PRODUCT_ID_REG0 + 6)
#define PRODUCT_ID_REG7 (PRODUCT_ID_REG0 + 7)
#define PRODUCT_ID_REG8 (PRODUCT_ID_REG0 + 8)
#define PRODUCT_ID_REG9 (PRODUCT_ID_REG0 + 9)
#define PRODUCT_ID_REG10 (PRODUCT_ID_REG0 + 10)
#define PRODUCT_ID_REG11 (PRODUCT_ID_REG0 + 11)
#define PRODUCT_ID_REG12 (PRODUCT_ID_REG0 + 12)
#define PRODUCT_ID_REG13 (PRODUCT_ID_REG0 + 13)
#define PRODUCT_ID_REG14 (PRODUCT_ID_REG0 + 14)
#define PRODUCT_ID_REG15 (PRODUCT_ID_REG0 + 15)
#define DATA_REG0 0x0400
#define ABS_PRESSURE_REG 0x0401
#define ABS_MSB_X_REG 0x0402
#define ABS_LSB_X_REG (ABS_MSB_X_REG + 1)
#define ABS_MSB_Y_REG 0x0404
#define ABS_LSB_Y_REG (ABS_MSB_Y_REG + 1)
#define REL_X_REG 0x0406
#define REL_Y_REG 0x0407
#define DEV_QUERY_REG0 0x1000
#define DEV_QUERY_REG1 (DEV_QUERY_REG0 + 1)
#define DEV_QUERY_REG2 (DEV_QUERY_REG0 + 2)
#define DEV_QUERY_REG3 (DEV_QUERY_REG0 + 3)
#define DEV_QUERY_REG4 (DEV_QUERY_REG0 + 4)
#define DEV_QUERY_REG5 (DEV_QUERY_REG0 + 5)
#define DEV_QUERY_REG6 (DEV_QUERY_REG0 + 6)
#define DEV_QUERY_REG7 (DEV_QUERY_REG0 + 7)
#define DEV_QUERY_REG8 (DEV_QUERY_REG0 + 8)
#define GENERAL_2D_CONTROL_REG 0x1041
#define SENSOR_SENSITIVITY_REG 0x1044
#define SENS_MAX_POS_MSB_REG 0x1046
#define SENS_MAX_POS_LSB_REG (SENS_MAX_POS_UPPER_REG + 1)
/* Register bits */
/* Device Control Register Bits */
#define REPORT_RATE_1ST_BIT 6
/* Interrupt Enable Register Bits (INTERRUPT_EN_REG) */
#define F10_ABS_INT_ENA 0
#define F10_REL_INT_ENA 1
#define F20_INT_ENA 2
/* Interrupt Request Register Bits (INT_REQ_STAT_REG | DEVICE_STATUS_REG) */
#define F10_ABS_INT_REQ 0
#define F10_REL_INT_REQ 1
#define F20_INT_REQ 2
/* Device Status Register Bits (DEVICE_STATUS_REG) */
#define STAT_CONFIGURED 6
#define STAT_ERROR 7
/* Device Command Register Bits (DEV_COMMAND_REG) */
#define RESET_COMMAND 0x01
#define REZERO_COMMAND 0x02
/* Data Register 0 Bits (DATA_REG0) */
#define GESTURE 3
/* Device Query Registers Bits */
/* DEV_QUERY_REG3 */
#define HAS_PALM_DETECT 1
#define HAS_MULTI_FING 2
#define HAS_SCROLLER 4
#define HAS_2D_SCROLL 5
/* General 2D Control Register Bits (GENERAL_2D_CONTROL_REG) */
#define NO_DECELERATION 1
#define REDUCE_REPORTING 3
#define NO_FILTER 5
/* Function Masks */
/* Device Control Register Masks (DEV_CONTROL_REG) */
#define REPORT_RATE_MSK 0xc0
#define SLEEP_MODE_MSK 0x07
/* Device Sleep Modes */
#define FULL_AWAKE 0x0
#define NORMAL_OP 0x1
#define LOW_PWR_OP 0x2
#define VERY_LOW_PWR_OP 0x3
#define SENS_SLEEP 0x4
#define SLEEP_MOD 0x5
#define DEEP_SLEEP 0x6
#define HIBERNATE 0x7
/* Interrupt Register Mask */
/* (INT_REQ_STAT_REG | DEVICE_STATUS_REG | INTERRUPT_EN_REG) */
#define INT_ENA_REQ_MSK 0x07
#define INT_ENA_ABS_MSK 0x01
#define INT_ENA_REL_MSK 0x02
#define INT_ENA_F20_MSK 0x04
/* Device Status Register Masks (DEVICE_STATUS_REG) */
#define CONFIGURED_MSK 0x40
#define ERROR_MSK 0x80
/* Data Register 0 Masks */
#define FINGER_WIDTH_MSK 0xf0
#define GESTURE_MSK 0x08
#define SENSOR_STATUS_MSK 0x07
/*
* MSB Position Register Masks
* ABS_MSB_X_REG | ABS_MSB_Y_REG | SENS_MAX_POS_MSB_REG |
* DEV_QUERY_REG3 | DEV_QUERY_REG5
*/
#define MSB_POSITION_MSK 0x1f
/* Device Query Registers Masks */
/* DEV_QUERY_REG2 */
#define NUM_EXTRA_POS_MSK 0x07
/* When in IRQ mode read the device every THREAD_IRQ_SLEEP_SECS */
#define THREAD_IRQ_SLEEP_SECS 2
#define THREAD_IRQ_SLEEP_MSECS (THREAD_IRQ_SLEEP_SECS * MSEC_PER_SEC)
/*
* When in Polling mode and no data received for NO_DATA_THRES msecs
* reduce the polling rate to NO_DATA_SLEEP_MSECS
*/
#define NO_DATA_THRES (MSEC_PER_SEC)
#define NO_DATA_SLEEP_MSECS (MSEC_PER_SEC / 4)
/* Control touchpad's No Deceleration option */
static bool no_decel = true;
module_param(no_decel, bool, 0644);
MODULE_PARM_DESC(no_decel, "No Deceleration. Default = 1 (on)");
/* Control touchpad's Reduced Reporting option */
static bool reduce_report;
module_param(reduce_report, bool, 0644);
MODULE_PARM_DESC(reduce_report, "Reduced Reporting. Default = 0 (off)");
/* Control touchpad's No Filter option */
static bool no_filter;
module_param(no_filter, bool, 0644);
MODULE_PARM_DESC(no_filter, "No Filter. Default = 0 (off)");
/*
* touchpad Attention line is Active Low and Open Drain,
* therefore should be connected to pulled up line
* and the irq configuration should be set to Falling Edge Trigger
*/
/* Control IRQ / Polling option */
static bool polling_req;
module_param(polling_req, bool, 0444);
MODULE_PARM_DESC(polling_req, "Request Polling. Default = 0 (use irq)");
/* Control Polling Rate */
static int scan_rate = 80;
module_param(scan_rate, int, 0644);
MODULE_PARM_DESC(scan_rate, "Polling rate in times/sec. Default = 80");
/* The main device structure */
struct synaptics_i2c {
struct i2c_client *client;
struct input_dev *input;
struct delayed_work dwork;
spinlock_t lock;
int no_data_count;
int no_decel_param;
int reduce_report_param;
int no_filter_param;
int scan_rate_param;
int scan_ms;
};
static inline void set_scan_rate(struct synaptics_i2c *touch, int scan_rate)
{
touch->scan_ms = MSEC_PER_SEC / scan_rate;
touch->scan_rate_param = scan_rate;
}
/*
* Driver's initial design makes no race condition possible on i2c bus,
* so there is no need in any locking.
* Keep it in mind, while playing with the code.
*/
static s32 synaptics_i2c_reg_get(struct i2c_client *client, u16 reg)
{
int ret;
ret = i2c_smbus_write_byte_data(client, PAGE_SEL_REG, reg >> 8);
if (ret == 0)
ret = i2c_smbus_read_byte_data(client, reg & 0xff);
return ret;
}
static s32 synaptics_i2c_reg_set(struct i2c_client *client, u16 reg, u8 val)
{
int ret;
ret = i2c_smbus_write_byte_data(client, PAGE_SEL_REG, reg >> 8);
if (ret == 0)
ret = i2c_smbus_write_byte_data(client, reg & 0xff, val);
return ret;
}
static s32 synaptics_i2c_word_get(struct i2c_client *client, u16 reg)
{
int ret;
ret = i2c_smbus_write_byte_data(client, PAGE_SEL_REG, reg >> 8);
if (ret == 0)
ret = i2c_smbus_read_word_data(client, reg & 0xff);
return ret;
}
static int synaptics_i2c_config(struct i2c_client *client)
{
int ret, control;
u8 int_en;
/* set Report Rate to Device Highest (>=80) and Sleep to normal */
ret = synaptics_i2c_reg_set(client, DEV_CONTROL_REG, 0xc1);
if (ret)
return ret;
/* set Interrupt Disable to Func20 / Enable to Func10) */
int_en = (polling_req) ? 0 : INT_ENA_ABS_MSK | INT_ENA_REL_MSK;
ret = synaptics_i2c_reg_set(client, INTERRUPT_EN_REG, int_en);
if (ret)
return ret;
control = synaptics_i2c_reg_get(client, GENERAL_2D_CONTROL_REG);
/* No Deceleration */
control |= no_decel ? 1 << NO_DECELERATION : 0;
/* Reduced Reporting */
control |= reduce_report ? 1 << REDUCE_REPORTING : 0;
/* No Filter */
control |= no_filter ? 1 << NO_FILTER : 0;
ret = synaptics_i2c_reg_set(client, GENERAL_2D_CONTROL_REG, control);
if (ret)
return ret;
return 0;
}
static int synaptics_i2c_reset_config(struct i2c_client *client)
{
int ret;
/* Reset the Touchpad */
ret = synaptics_i2c_reg_set(client, DEV_COMMAND_REG, RESET_COMMAND);
if (ret) {
dev_err(&client->dev, "Unable to reset device\n");
} else {
msleep(SOFT_RESET_DELAY_MS);
ret = synaptics_i2c_config(client);
if (ret)
dev_err(&client->dev, "Unable to config device\n");
}
return ret;
}
static int synaptics_i2c_check_error(struct i2c_client *client)
{
int status, ret = 0;
status = i2c_smbus_read_byte_data(client, DEVICE_STATUS_REG) &
(CONFIGURED_MSK | ERROR_MSK);
if (status != CONFIGURED_MSK)
ret = synaptics_i2c_reset_config(client);
return ret;
}
static bool synaptics_i2c_get_input(struct synaptics_i2c *touch)
{
struct input_dev *input = touch->input;
int xy_delta, gesture;
s32 data;
s8 x_delta, y_delta;
/* Deal with spontaneous resets and errors */
if (synaptics_i2c_check_error(touch->client))
return false;
/* Get Gesture Bit */
data = synaptics_i2c_reg_get(touch->client, DATA_REG0);
gesture = (data >> GESTURE) & 0x1;
/*
* Get Relative axes. we have to get them in one shot,
* so we get 2 bytes starting from REL_X_REG.
*/
xy_delta = synaptics_i2c_word_get(touch->client, REL_X_REG) & 0xffff;
/* Separate X from Y */
x_delta = xy_delta & 0xff;
y_delta = (xy_delta >> REGISTER_LENGTH) & 0xff;
/* Report the button event */
input_report_key(input, BTN_LEFT, gesture);
/* Report the deltas */
input_report_rel(input, REL_X, x_delta);
input_report_rel(input, REL_Y, -y_delta);
input_sync(input);
return xy_delta || gesture;
}
static void synaptics_i2c_reschedule_work(struct synaptics_i2c *touch,
unsigned long delay)
{
unsigned long flags;
spin_lock_irqsave(&touch->lock, flags);
mod_delayed_work(system_wq, &touch->dwork, delay);
spin_unlock_irqrestore(&touch->lock, flags);
}
static irqreturn_t synaptics_i2c_irq(int irq, void *dev_id)
{
struct synaptics_i2c *touch = dev_id;
synaptics_i2c_reschedule_work(touch, 0);
return IRQ_HANDLED;
}
static void synaptics_i2c_check_params(struct synaptics_i2c *touch)
{
bool reset = false;
if (scan_rate != touch->scan_rate_param)
set_scan_rate(touch, scan_rate);
if (no_decel != touch->no_decel_param) {
touch->no_decel_param = no_decel;
reset = true;
}
if (no_filter != touch->no_filter_param) {
touch->no_filter_param = no_filter;
reset = true;
}
if (reduce_report != touch->reduce_report_param) {
touch->reduce_report_param = reduce_report;
reset = true;
}
if (reset)
synaptics_i2c_reset_config(touch->client);
}
/* Control the Device polling rate / Work Handler sleep time */
static unsigned long synaptics_i2c_adjust_delay(struct synaptics_i2c *touch,
bool have_data)
{
unsigned long delay, nodata_count_thres;
if (polling_req) {
delay = touch->scan_ms;
if (have_data) {
touch->no_data_count = 0;
} else {
nodata_count_thres = NO_DATA_THRES / touch->scan_ms;
if (touch->no_data_count < nodata_count_thres)
touch->no_data_count++;
else
delay = NO_DATA_SLEEP_MSECS;
}
return msecs_to_jiffies(delay);
} else {
delay = msecs_to_jiffies(THREAD_IRQ_SLEEP_MSECS);
return round_jiffies_relative(delay);
}
}
/* Work Handler */
static void synaptics_i2c_work_handler(struct work_struct *work)
{
bool have_data;
struct synaptics_i2c *touch =
container_of(work, struct synaptics_i2c, dwork.work);
unsigned long delay;
synaptics_i2c_check_params(touch);
have_data = synaptics_i2c_get_input(touch);
delay = synaptics_i2c_adjust_delay(touch, have_data);
/*
* While interrupt driven, there is no real need to poll the device.
* But touchpads are very sensitive, so there could be errors
* related to physical environment and the attention line isn't
* necessarily asserted. In such case we can lose the touchpad.
* We poll the device once in THREAD_IRQ_SLEEP_SECS and
* if error is detected, we try to reset and reconfigure the touchpad.
*/
synaptics_i2c_reschedule_work(touch, delay);
}
static int synaptics_i2c_open(struct input_dev *input)
{
struct synaptics_i2c *touch = input_get_drvdata(input);
int ret;
ret = synaptics_i2c_reset_config(touch->client);
if (ret)
return ret;
if (polling_req)
synaptics_i2c_reschedule_work(touch,
msecs_to_jiffies(NO_DATA_SLEEP_MSECS));
return 0;
}
static void synaptics_i2c_close(struct input_dev *input)
{
struct synaptics_i2c *touch = input_get_drvdata(input);
if (!polling_req)
synaptics_i2c_reg_set(touch->client, INTERRUPT_EN_REG, 0);
cancel_delayed_work_sync(&touch->dwork);
/* Save some power */
synaptics_i2c_reg_set(touch->client, DEV_CONTROL_REG, DEEP_SLEEP);
}
static void synaptics_i2c_set_input_params(struct synaptics_i2c *touch)
{
struct input_dev *input = touch->input;
input->name = touch->client->name;
input->phys = touch->client->adapter->name;
input->id.bustype = BUS_I2C;
input->id.version = synaptics_i2c_word_get(touch->client,
INFO_QUERY_REG0);
input->dev.parent = &touch->client->dev;
input->open = synaptics_i2c_open;
input->close = synaptics_i2c_close;
input_set_drvdata(input, touch);
/* Register the device as mouse */
__set_bit(EV_REL, input->evbit);
__set_bit(REL_X, input->relbit);
__set_bit(REL_Y, input->relbit);
/* Register device's buttons and keys */
__set_bit(EV_KEY, input->evbit);
__set_bit(BTN_LEFT, input->keybit);
}
static struct synaptics_i2c *synaptics_i2c_touch_create(struct i2c_client *client)
{
struct synaptics_i2c *touch;
touch = kzalloc(sizeof(struct synaptics_i2c), GFP_KERNEL);
if (!touch)
return NULL;
touch->client = client;
touch->no_decel_param = no_decel;
touch->scan_rate_param = scan_rate;
set_scan_rate(touch, scan_rate);
INIT_DELAYED_WORK(&touch->dwork, synaptics_i2c_work_handler);
spin_lock_init(&touch->lock);
return touch;
}
static int synaptics_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *dev_id)
{
int ret;
struct synaptics_i2c *touch;
touch = synaptics_i2c_touch_create(client);
if (!touch)
return -ENOMEM;
ret = synaptics_i2c_reset_config(client);
if (ret)
goto err_mem_free;
if (client->irq < 1)
polling_req = true;
touch->input = input_allocate_device();
if (!touch->input) {
ret = -ENOMEM;
goto err_mem_free;
}
synaptics_i2c_set_input_params(touch);
if (!polling_req) {
dev_dbg(&touch->client->dev,
"Requesting IRQ: %d\n", touch->client->irq);
ret = request_irq(touch->client->irq, synaptics_i2c_irq,
IRQ_TYPE_EDGE_FALLING,
DRIVER_NAME, touch);
if (ret) {
dev_warn(&touch->client->dev,
"IRQ request failed: %d, "
"falling back to polling\n", ret);
polling_req = true;
synaptics_i2c_reg_set(touch->client,
INTERRUPT_EN_REG, 0);
}
}
if (polling_req)
dev_dbg(&touch->client->dev,
"Using polling at rate: %d times/sec\n", scan_rate);
/* Register the device in input subsystem */
ret = input_register_device(touch->input);
if (ret) {
dev_err(&client->dev,
"Input device register failed: %d\n", ret);
goto err_input_free;
}
i2c_set_clientdata(client, touch);
return 0;
err_input_free:
input_free_device(touch->input);
err_mem_free:
kfree(touch);
return ret;
}
static int synaptics_i2c_remove(struct i2c_client *client)
{
struct synaptics_i2c *touch = i2c_get_clientdata(client);
if (!polling_req)
free_irq(client->irq, touch);
input_unregister_device(touch->input);
kfree(touch);
return 0;
}
static int __maybe_unused synaptics_i2c_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct synaptics_i2c *touch = i2c_get_clientdata(client);
cancel_delayed_work_sync(&touch->dwork);
/* Save some power */
synaptics_i2c_reg_set(touch->client, DEV_CONTROL_REG, DEEP_SLEEP);
return 0;
}
static int __maybe_unused synaptics_i2c_resume(struct device *dev)
{
int ret;
struct i2c_client *client = to_i2c_client(dev);
struct synaptics_i2c *touch = i2c_get_clientdata(client);
ret = synaptics_i2c_reset_config(client);
if (ret)
return ret;
synaptics_i2c_reschedule_work(touch,
msecs_to_jiffies(NO_DATA_SLEEP_MSECS));
return 0;
}
static SIMPLE_DEV_PM_OPS(synaptics_i2c_pm, synaptics_i2c_suspend,
synaptics_i2c_resume);
static const struct i2c_device_id synaptics_i2c_id_table[] = {
{ "synaptics_i2c", 0 },
{ },
};
MODULE_DEVICE_TABLE(i2c, synaptics_i2c_id_table);
static struct i2c_driver synaptics_i2c_driver = {
.driver = {
.name = DRIVER_NAME,
.pm = &synaptics_i2c_pm,
},
.probe = synaptics_i2c_probe,
.remove = synaptics_i2c_remove,
.id_table = synaptics_i2c_id_table,
};
module_i2c_driver(synaptics_i2c_driver);
MODULE_DESCRIPTION("Synaptics I2C touchpad driver");
MODULE_AUTHOR("Mike Rapoport, Igor Grinberg, Compulab");
MODULE_LICENSE("GPL");