| /* |
| * 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 <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 = 1; |
| 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 spontanious resets and errors */ |
| if (synaptics_i2c_check_error(touch->client)) |
| return 0; |
| |
| /* 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 __devexit 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; |
| } |
| |
| #ifdef CONFIG_PM_SLEEP |
| static int 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 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; |
| } |
| #endif |
| |
| 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, |
| .owner = THIS_MODULE, |
| .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"); |
| |