/* * Copyright (C) 2012 Simon Budig, * * This software is licensed under the terms of the GNU General Public * License version 2, as published by the Free Software Foundation, and * may be copied, distributed, and modified under those terms. * * 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. * * You should have received a copy of the GNU General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /* * This is a driver for the EDT "Polytouch" family of touch controllers * based on the FocalTech FT5x06 line of chips. * * Development of this driver has been sponsored by Glyn: * http://www.glyn.com/Products/Displays */ #include #include #include #include #include #include #include #include #include #include #include #include #define MAX_SUPPORT_POINTS 5 #define WORK_REGISTER_THRESHOLD 0x00 #define WORK_REGISTER_REPORT_RATE 0x08 #define WORK_REGISTER_GAIN 0x30 #define WORK_REGISTER_OFFSET 0x31 #define WORK_REGISTER_NUM_X 0x33 #define WORK_REGISTER_NUM_Y 0x34 #define WORK_REGISTER_OPMODE 0x3c #define FACTORY_REGISTER_OPMODE 0x01 #define TOUCH_EVENT_DOWN 0x00 #define TOUCH_EVENT_UP 0x01 #define TOUCH_EVENT_ON 0x02 #define TOUCH_EVENT_RESERVED 0x03 #define EDT_NAME_LEN 23 #define EDT_SWITCH_MODE_RETRIES 10 #define EDT_SWITCH_MODE_DELAY 5 /* msec */ #define EDT_RAW_DATA_RETRIES 100 #define EDT_RAW_DATA_DELAY 1 /* msec */ struct edt_ft5x06_ts_data { struct i2c_client *client; struct input_dev *input; u16 num_x; u16 num_y; #if defined(CONFIG_DEBUG_FS) struct dentry *debug_dir; u8 *raw_buffer; size_t raw_bufsize; #endif struct mutex mutex; bool factory_mode; int threshold; int gain; int offset; int report_rate; char name[EDT_NAME_LEN]; }; static int edt_ft5x06_ts_readwrite(struct i2c_client *client, u16 wr_len, u8 *wr_buf, u16 rd_len, u8 *rd_buf) { struct i2c_msg wrmsg[2]; int i = 0; int ret; if (wr_len) { wrmsg[i].addr = client->addr; wrmsg[i].flags = 0; wrmsg[i].len = wr_len; wrmsg[i].buf = wr_buf; i++; } if (rd_len) { wrmsg[i].addr = client->addr; wrmsg[i].flags = I2C_M_RD; wrmsg[i].len = rd_len; wrmsg[i].buf = rd_buf; i++; } ret = i2c_transfer(client->adapter, wrmsg, i); if (ret < 0) return ret; if (ret != i) return -EIO; return 0; } static bool edt_ft5x06_ts_check_crc(struct edt_ft5x06_ts_data *tsdata, u8 *buf, int buflen) { int i; u8 crc = 0; for (i = 0; i < buflen - 1; i++) crc ^= buf[i]; if (crc != buf[buflen-1]) { dev_err_ratelimited(&tsdata->client->dev, "crc error: 0x%02x expected, got 0x%02x\n", crc, buf[buflen-1]); return false; } return true; } static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id) { struct edt_ft5x06_ts_data *tsdata = dev_id; struct device *dev = &tsdata->client->dev; u8 cmd = 0xf9; u8 rdbuf[26]; int i, type, x, y, id; int error; memset(rdbuf, 0, sizeof(rdbuf)); error = edt_ft5x06_ts_readwrite(tsdata->client, sizeof(cmd), &cmd, sizeof(rdbuf), rdbuf); if (error) { dev_err_ratelimited(dev, "Unable to fetch data, error: %d\n", error); goto out; } if (rdbuf[0] != 0xaa || rdbuf[1] != 0xaa || rdbuf[2] != 26) { dev_err_ratelimited(dev, "Unexpected header: %02x%02x%02x!\n", rdbuf[0], rdbuf[1], rdbuf[2]); goto out; } if (!edt_ft5x06_ts_check_crc(tsdata, rdbuf, 26)) goto out; for (i = 0; i < MAX_SUPPORT_POINTS; i++) { u8 *buf = &rdbuf[i * 4 + 5]; bool down; type = buf[0] >> 6; /* ignore Reserved events */ if (type == TOUCH_EVENT_RESERVED) continue; x = ((buf[0] << 8) | buf[1]) & 0x0fff; y = ((buf[2] << 8) | buf[3]) & 0x0fff; id = (buf[2] >> 4) & 0x0f; down = (type != TOUCH_EVENT_UP); input_mt_slot(tsdata->input, id); input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER, down); if (!down) continue; input_report_abs(tsdata->input, ABS_MT_POSITION_X, x); input_report_abs(tsdata->input, ABS_MT_POSITION_Y, y); } input_mt_report_pointer_emulation(tsdata->input, true); input_sync(tsdata->input); out: return IRQ_HANDLED; } static int edt_ft5x06_register_write(struct edt_ft5x06_ts_data *tsdata, u8 addr, u8 value) { u8 wrbuf[4]; wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc; wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f; wrbuf[2] = value; wrbuf[3] = wrbuf[0] ^ wrbuf[1] ^ wrbuf[2]; return edt_ft5x06_ts_readwrite(tsdata->client, 4, wrbuf, 0, NULL); } static int edt_ft5x06_register_read(struct edt_ft5x06_ts_data *tsdata, u8 addr) { u8 wrbuf[2], rdbuf[2]; int error; wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc; wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f; wrbuf[1] |= tsdata->factory_mode ? 0x80 : 0x40; error = edt_ft5x06_ts_readwrite(tsdata->client, 2, wrbuf, 2, rdbuf); if (error) return error; if ((wrbuf[0] ^ wrbuf[1] ^ rdbuf[0]) != rdbuf[1]) { dev_err(&tsdata->client->dev, "crc error: 0x%02x expected, got 0x%02x\n", wrbuf[0] ^ wrbuf[1] ^ rdbuf[0], rdbuf[1]); return -EIO; } return rdbuf[0]; } struct edt_ft5x06_attribute { struct device_attribute dattr; size_t field_offset; u8 limit_low; u8 limit_high; u8 addr; }; #define EDT_ATTR(_field, _mode, _addr, _limit_low, _limit_high) \ struct edt_ft5x06_attribute edt_ft5x06_attr_##_field = { \ .dattr = __ATTR(_field, _mode, \ edt_ft5x06_setting_show, \ edt_ft5x06_setting_store), \ .field_offset = \ offsetof(struct edt_ft5x06_ts_data, _field), \ .limit_low = _limit_low, \ .limit_high = _limit_high, \ .addr = _addr, \ } static ssize_t edt_ft5x06_setting_show(struct device *dev, struct device_attribute *dattr, char *buf) { struct i2c_client *client = to_i2c_client(dev); struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); struct edt_ft5x06_attribute *attr = container_of(dattr, struct edt_ft5x06_attribute, dattr); u8 *field = (u8 *)((char *)tsdata + attr->field_offset); int val; size_t count = 0; int error = 0; mutex_lock(&tsdata->mutex); if (tsdata->factory_mode) { error = -EIO; goto out; } val = edt_ft5x06_register_read(tsdata, attr->addr); if (val < 0) { error = val; dev_err(&tsdata->client->dev, "Failed to fetch attribute %s, error %d\n", dattr->attr.name, error); goto out; } if (val != *field) { dev_warn(&tsdata->client->dev, "%s: read (%d) and stored value (%d) differ\n", dattr->attr.name, val, *field); *field = val; } count = scnprintf(buf, PAGE_SIZE, "%d\n", val); out: mutex_unlock(&tsdata->mutex); return error ?: count; } static ssize_t edt_ft5x06_setting_store(struct device *dev, struct device_attribute *dattr, const char *buf, size_t count) { struct i2c_client *client = to_i2c_client(dev); struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); struct edt_ft5x06_attribute *attr = container_of(dattr, struct edt_ft5x06_attribute, dattr); u8 *field = (u8 *)((char *)tsdata + attr->field_offset); unsigned int val; int error; mutex_lock(&tsdata->mutex); if (tsdata->factory_mode) { error = -EIO; goto out; } error = kstrtouint(buf, 0, &val); if (error) goto out; if (val < attr->limit_low || val > attr->limit_high) { error = -ERANGE; goto out; } error = edt_ft5x06_register_write(tsdata, attr->addr, val); if (error) { dev_err(&tsdata->client->dev, "Failed to update attribute %s, error: %d\n", dattr->attr.name, error); goto out; } *field = val; out: mutex_unlock(&tsdata->mutex); return error ?: count; } static EDT_ATTR(gain, S_IWUSR | S_IRUGO, WORK_REGISTER_GAIN, 0, 31); static EDT_ATTR(offset, S_IWUSR | S_IRUGO, WORK_REGISTER_OFFSET, 0, 31); static EDT_ATTR(threshold, S_IWUSR | S_IRUGO, WORK_REGISTER_THRESHOLD, 20, 80); static EDT_ATTR(report_rate, S_IWUSR | S_IRUGO, WORK_REGISTER_REPORT_RATE, 3, 14); static struct attribute *edt_ft5x06_attrs[] = { &edt_ft5x06_attr_gain.dattr.attr, &edt_ft5x06_attr_offset.dattr.attr, &edt_ft5x06_attr_threshold.dattr.attr, &edt_ft5x06_attr_report_rate.dattr.attr, NULL }; static const struct attribute_group edt_ft5x06_attr_group = { .attrs = edt_ft5x06_attrs, }; #ifdef CONFIG_DEBUG_FS static int edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data *tsdata) { struct i2c_client *client = tsdata->client; int retries = EDT_SWITCH_MODE_RETRIES; int ret; int error; disable_irq(client->irq); if (!tsdata->raw_buffer) { tsdata->raw_bufsize = tsdata->num_x * tsdata->num_y * sizeof(u16); tsdata->raw_buffer = kzalloc(tsdata->raw_bufsize, GFP_KERNEL); if (!tsdata->raw_buffer) { error = -ENOMEM; goto err_out; } } /* mode register is 0x3c when in the work mode */ error = edt_ft5x06_register_write(tsdata, WORK_REGISTER_OPMODE, 0x03); if (error) { dev_err(&client->dev, "failed to switch to factory mode, error %d\n", error); goto err_out; } tsdata->factory_mode = true; do { mdelay(EDT_SWITCH_MODE_DELAY); /* mode register is 0x01 when in factory mode */ ret = edt_ft5x06_register_read(tsdata, FACTORY_REGISTER_OPMODE); if (ret == 0x03) break; } while (--retries > 0); if (retries == 0) { dev_err(&client->dev, "not in factory mode after %dms.\n", EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY); error = -EIO; goto err_out; } return 0; err_out: kfree(tsdata->raw_buffer); tsdata->raw_buffer = NULL; tsdata->factory_mode = false; enable_irq(client->irq); return error; } static int edt_ft5x06_work_mode(struct edt_ft5x06_ts_data *tsdata) { struct i2c_client *client = tsdata->client; int retries = EDT_SWITCH_MODE_RETRIES; int ret; int error; /* mode register is 0x01 when in the factory mode */ error = edt_ft5x06_register_write(tsdata, FACTORY_REGISTER_OPMODE, 0x1); if (error) { dev_err(&client->dev, "failed to switch to work mode, error: %d\n", error); return error; } tsdata->factory_mode = false; do { mdelay(EDT_SWITCH_MODE_DELAY); /* mode register is 0x01 when in factory mode */ ret = edt_ft5x06_register_read(tsdata, WORK_REGISTER_OPMODE); if (ret == 0x01) break; } while (--retries > 0); if (retries == 0) { dev_err(&client->dev, "not in work mode after %dms.\n", EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY); tsdata->factory_mode = true; return -EIO; } if (tsdata->raw_buffer) kfree(tsdata->raw_buffer); tsdata->raw_buffer = NULL; /* restore parameters */ edt_ft5x06_register_write(tsdata, WORK_REGISTER_THRESHOLD, tsdata->threshold); edt_ft5x06_register_write(tsdata, WORK_REGISTER_GAIN, tsdata->gain); edt_ft5x06_register_write(tsdata, WORK_REGISTER_OFFSET, tsdata->offset); edt_ft5x06_register_write(tsdata, WORK_REGISTER_REPORT_RATE, tsdata->report_rate); enable_irq(client->irq); return 0; } static int edt_ft5x06_debugfs_mode_get(void *data, u64 *mode) { struct edt_ft5x06_ts_data *tsdata = data; *mode = tsdata->factory_mode; return 0; }; static int edt_ft5x06_debugfs_mode_set(void *data, u64 mode) { struct edt_ft5x06_ts_data *tsdata = data; int retval = 0; if (mode > 1) return -ERANGE; mutex_lock(&tsdata->mutex); if (mode != tsdata->factory_mode) { retval = mode ? edt_ft5x06_factory_mode(tsdata) : edt_ft5x06_work_mode(tsdata); } mutex_unlock(&tsdata->mutex); return retval; }; DEFINE_SIMPLE_ATTRIBUTE(debugfs_mode_fops, edt_ft5x06_debugfs_mode_get, edt_ft5x06_debugfs_mode_set, "%llu\n"); static int edt_ft5x06_debugfs_raw_data_open(struct inode *inode, struct file *file) { file->private_data = inode->i_private; return 0; } static ssize_t edt_ft5x06_debugfs_raw_data_read(struct file *file, char __user *buf, size_t count, loff_t *off) { struct edt_ft5x06_ts_data *tsdata = file->private_data; struct i2c_client *client = tsdata->client; int retries = EDT_RAW_DATA_RETRIES; int val, i, error; size_t read = 0; int colbytes; char wrbuf[3]; u8 *rdbuf; if (*off < 0 || *off >= tsdata->raw_bufsize) return 0; mutex_lock(&tsdata->mutex); if (!tsdata->factory_mode || !tsdata->raw_buffer) { error = -EIO; goto out; } error = edt_ft5x06_register_write(tsdata, 0x08, 0x01); if (error) { dev_dbg(&client->dev, "failed to write 0x08 register, error %d\n", error); goto out; } do { msleep(EDT_RAW_DATA_DELAY); val = edt_ft5x06_register_read(tsdata, 0x08); if (val < 1) break; } while (--retries > 0); if (val < 0) { error = val; dev_dbg(&client->dev, "failed to read 0x08 register, error %d\n", error); goto out; } if (retries == 0) { dev_dbg(&client->dev, "timed out waiting for register to settle\n"); error = -ETIMEDOUT; goto out; } rdbuf = tsdata->raw_buffer; colbytes = tsdata->num_y * sizeof(u16); wrbuf[0] = 0xf5; wrbuf[1] = 0x0e; for (i = 0; i < tsdata->num_x; i++) { wrbuf[2] = i; /* column index */ error = edt_ft5x06_ts_readwrite(tsdata->client, sizeof(wrbuf), wrbuf, colbytes, rdbuf); if (error) goto out; rdbuf += colbytes; } read = min_t(size_t, count, tsdata->raw_bufsize - *off); error = copy_to_user(buf, tsdata->raw_buffer + *off, read); if (!error) *off += read; out: mutex_unlock(&tsdata->mutex); return error ?: read; }; static const struct file_operations debugfs_raw_data_fops = { .open = edt_ft5x06_debugfs_raw_data_open, .read = edt_ft5x06_debugfs_raw_data_read, }; static void __devinit edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata, const char *debugfs_name) { tsdata->debug_dir = debugfs_create_dir(debugfs_name, NULL); if (!tsdata->debug_dir) return; debugfs_create_u16("num_x", S_IRUSR, tsdata->debug_dir, &tsdata->num_x); debugfs_create_u16("num_y", S_IRUSR, tsdata->debug_dir, &tsdata->num_y); debugfs_create_file("mode", S_IRUSR | S_IWUSR, tsdata->debug_dir, tsdata, &debugfs_mode_fops); debugfs_create_file("raw_data", S_IRUSR, tsdata->debug_dir, tsdata, &debugfs_raw_data_fops); } static void __devexit edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata) { if (tsdata->debug_dir) debugfs_remove_recursive(tsdata->debug_dir); } #else static inline void edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata, const char *debugfs_name) { } static inline void edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata) { } #endif /* CONFIG_DEBUGFS */ static int __devinit edt_ft5x06_ts_reset(struct i2c_client *client, int reset_pin) { int error; if (gpio_is_valid(reset_pin)) { /* this pulls reset down, enabling the low active reset */ error = gpio_request_one(reset_pin, GPIOF_OUT_INIT_LOW, "edt-ft5x06 reset"); if (error) { dev_err(&client->dev, "Failed to request GPIO %d as reset pin, error %d\n", reset_pin, error); return error; } mdelay(50); gpio_set_value(reset_pin, 1); mdelay(100); } return 0; } static int __devinit edt_ft5x06_ts_identify(struct i2c_client *client, char *model_name, char *fw_version) { u8 rdbuf[EDT_NAME_LEN]; char *p; int error; error = edt_ft5x06_ts_readwrite(client, 1, "\xbb", EDT_NAME_LEN - 1, rdbuf); if (error) return error; /* remove last '$' end marker */ rdbuf[EDT_NAME_LEN - 1] = '\0'; if (rdbuf[EDT_NAME_LEN - 2] == '$') rdbuf[EDT_NAME_LEN - 2] = '\0'; /* look for Model/Version separator */ p = strchr(rdbuf, '*'); if (p) *p++ = '\0'; strlcpy(model_name, rdbuf + 1, EDT_NAME_LEN); strlcpy(fw_version, p ? p : "", EDT_NAME_LEN); return 0; } #define EDT_ATTR_CHECKSET(name, reg) \ if (pdata->name >= edt_ft5x06_attr_##name.limit_low && \ pdata->name <= edt_ft5x06_attr_##name.limit_high) \ edt_ft5x06_register_write(tsdata, reg, pdata->name) static void __devinit edt_ft5x06_ts_get_defaults(struct edt_ft5x06_ts_data *tsdata, const struct edt_ft5x06_platform_data *pdata) { if (!pdata->use_parameters) return; /* pick up defaults from the platform data */ EDT_ATTR_CHECKSET(threshold, WORK_REGISTER_THRESHOLD); EDT_ATTR_CHECKSET(gain, WORK_REGISTER_GAIN); EDT_ATTR_CHECKSET(offset, WORK_REGISTER_OFFSET); EDT_ATTR_CHECKSET(report_rate, WORK_REGISTER_REPORT_RATE); } static void __devinit edt_ft5x06_ts_get_parameters(struct edt_ft5x06_ts_data *tsdata) { tsdata->threshold = edt_ft5x06_register_read(tsdata, WORK_REGISTER_THRESHOLD); tsdata->gain = edt_ft5x06_register_read(tsdata, WORK_REGISTER_GAIN); tsdata->offset = edt_ft5x06_register_read(tsdata, WORK_REGISTER_OFFSET); tsdata->report_rate = edt_ft5x06_register_read(tsdata, WORK_REGISTER_REPORT_RATE); tsdata->num_x = edt_ft5x06_register_read(tsdata, WORK_REGISTER_NUM_X); tsdata->num_y = edt_ft5x06_register_read(tsdata, WORK_REGISTER_NUM_Y); } static int __devinit edt_ft5x06_ts_probe(struct i2c_client *client, const struct i2c_device_id *id) { const struct edt_ft5x06_platform_data *pdata = client->dev.platform_data; struct edt_ft5x06_ts_data *tsdata; struct input_dev *input; int error; char fw_version[EDT_NAME_LEN]; dev_dbg(&client->dev, "probing for EDT FT5x06 I2C\n"); if (!pdata) { dev_err(&client->dev, "no platform data?\n"); return -EINVAL; } error = edt_ft5x06_ts_reset(client, pdata->reset_pin); if (error) return error; if (gpio_is_valid(pdata->irq_pin)) { error = gpio_request_one(pdata->irq_pin, GPIOF_IN, "edt-ft5x06 irq"); if (error) { dev_err(&client->dev, "Failed to request GPIO %d, error %d\n", pdata->irq_pin, error); return error; } } tsdata = kzalloc(sizeof(*tsdata), GFP_KERNEL); input = input_allocate_device(); if (!tsdata || !input) { dev_err(&client->dev, "failed to allocate driver data.\n"); error = -ENOMEM; goto err_free_mem; } mutex_init(&tsdata->mutex); tsdata->client = client; tsdata->input = input; tsdata->factory_mode = false; error = edt_ft5x06_ts_identify(client, tsdata->name, fw_version); if (error) { dev_err(&client->dev, "touchscreen probe failed\n"); goto err_free_mem; } edt_ft5x06_ts_get_defaults(tsdata, pdata); edt_ft5x06_ts_get_parameters(tsdata); dev_dbg(&client->dev, "Model \"%s\", Rev. \"%s\", %dx%d sensors\n", tsdata->name, fw_version, tsdata->num_x, tsdata->num_y); input->name = tsdata->name; input->id.bustype = BUS_I2C; input->dev.parent = &client->dev; __set_bit(EV_SYN, input->evbit); __set_bit(EV_KEY, input->evbit); __set_bit(EV_ABS, input->evbit); __set_bit(BTN_TOUCH, input->keybit); input_set_abs_params(input, ABS_X, 0, tsdata->num_x * 64 - 1, 0, 0); input_set_abs_params(input, ABS_Y, 0, tsdata->num_y * 64 - 1, 0, 0); input_set_abs_params(input, ABS_MT_POSITION_X, 0, tsdata->num_x * 64 - 1, 0, 0); input_set_abs_params(input, ABS_MT_POSITION_Y, 0, tsdata->num_y * 64 - 1, 0, 0); error = input_mt_init_slots(input, MAX_SUPPORT_POINTS); if (error) { dev_err(&client->dev, "Unable to init MT slots.\n"); goto err_free_mem; } input_set_drvdata(input, tsdata); i2c_set_clientdata(client, tsdata); error = request_threaded_irq(client->irq, NULL, edt_ft5x06_ts_isr, IRQF_TRIGGER_FALLING | IRQF_ONESHOT, client->name, tsdata); if (error) { dev_err(&client->dev, "Unable to request touchscreen IRQ.\n"); goto err_free_mem; } error = sysfs_create_group(&client->dev.kobj, &edt_ft5x06_attr_group); if (error) goto err_free_irq; error = input_register_device(input); if (error) goto err_remove_attrs; edt_ft5x06_ts_prepare_debugfs(tsdata, dev_driver_string(&client->dev)); device_init_wakeup(&client->dev, 1); dev_dbg(&client->dev, "EDT FT5x06 initialized: IRQ pin %d, Reset pin %d.\n", pdata->irq_pin, pdata->reset_pin); return 0; err_remove_attrs: sysfs_remove_group(&client->dev.kobj, &edt_ft5x06_attr_group); err_free_irq: free_irq(client->irq, tsdata); err_free_mem: input_free_device(input); kfree(tsdata); if (gpio_is_valid(pdata->irq_pin)) gpio_free(pdata->irq_pin); return error; } static int __devexit edt_ft5x06_ts_remove(struct i2c_client *client) { const struct edt_ft5x06_platform_data *pdata = dev_get_platdata(&client->dev); struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client); edt_ft5x06_ts_teardown_debugfs(tsdata); sysfs_remove_group(&client->dev.kobj, &edt_ft5x06_attr_group); free_irq(client->irq, tsdata); input_unregister_device(tsdata->input); if (gpio_is_valid(pdata->irq_pin)) gpio_free(pdata->irq_pin); if (gpio_is_valid(pdata->reset_pin)) gpio_free(pdata->reset_pin); kfree(tsdata->raw_buffer); kfree(tsdata); return 0; } #ifdef CONFIG_PM_SLEEP static int edt_ft5x06_ts_suspend(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); if (device_may_wakeup(dev)) enable_irq_wake(client->irq); return 0; } static int edt_ft5x06_ts_resume(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); if (device_may_wakeup(dev)) disable_irq_wake(client->irq); return 0; } #endif static SIMPLE_DEV_PM_OPS(edt_ft5x06_ts_pm_ops, edt_ft5x06_ts_suspend, edt_ft5x06_ts_resume); static const struct i2c_device_id edt_ft5x06_ts_id[] = { { "edt-ft5x06", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, edt_ft5x06_ts_id); static struct i2c_driver edt_ft5x06_ts_driver = { .driver = { .owner = THIS_MODULE, .name = "edt_ft5x06", .pm = &edt_ft5x06_ts_pm_ops, }, .id_table = edt_ft5x06_ts_id, .probe = edt_ft5x06_ts_probe, .remove = __devexit_p(edt_ft5x06_ts_remove), }; module_i2c_driver(edt_ft5x06_ts_driver); MODULE_AUTHOR("Simon Budig "); MODULE_DESCRIPTION("EDT FT5x06 I2C Touchscreen Driver"); MODULE_LICENSE("GPL");