--- /dev/null
+/*
+ * Copyright (C) 2011 Simon Budig, <simon.budig@kernelconcepts.de>
+ *
+ * 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 <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/input.h>
+#include <linux/i2c.h>
+#include <linux/uaccess.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+
+#include <linux/gpio.h>
+
+#include <linux/input/edt-ft5x06.h>
+
+#define DRIVER_VERSION "v0.5"
+
+#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
+
+struct edt_ft5x06_i2c_ts_data {
+ struct i2c_client *client;
+ struct input_dev *input;
+ int irq;
+ int irq_pin;
+ int reset_pin;
+ int num_x;
+ int num_y;
+
+ struct mutex mutex;
+ bool factory_mode;
+ int threshold;
+ int gain;
+ int offset;
+ int report_rate;
+};
+
+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, ret;
+
+ i = 0;
+ 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) {
+ dev_err(&client->dev, "i2c_transfer failed: %d\n", ret);
+ return ret;
+ }
+
+ return ret;
+}
+
+
+static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id)
+{
+ struct edt_ft5x06_i2c_ts_data *tsdata = dev_id;
+ unsigned char touching = 0;
+ unsigned char rdbuf[26], wrbuf[1];
+ int i, have_abs, type, ret;
+
+ memset(wrbuf, 0, sizeof(wrbuf));
+ memset(rdbuf, 0, sizeof(rdbuf));
+
+ wrbuf[0] = 0xf9;
+
+ mutex_lock(&tsdata->mutex);
+ ret = edt_ft5x06_ts_readwrite(tsdata->client,
+ 1, wrbuf,
+ sizeof(rdbuf), rdbuf);
+ mutex_unlock(&tsdata->mutex);
+ if (ret < 0) {
+ dev_err(&tsdata->client->dev,
+ "Unable to write to i2c touchscreen!\n");
+ goto out;
+ }
+
+ if (rdbuf[0] != 0xaa || rdbuf[1] != 0xaa || rdbuf[2] != 26) {
+ dev_err(&tsdata->client->dev,
+ "Unexpected header: %02x%02x%02x!\n",
+ rdbuf[0], rdbuf[1], rdbuf[2]);
+ }
+
+ have_abs = 0;
+ touching = rdbuf[3];
+ for (i = 0; i < touching; i++) {
+ type = rdbuf[i*4+5] >> 6;
+ /* ignore Touch Down and Reserved events */
+ if (type == 0x01 || type == 0x03)
+ continue;
+
+ if (!have_abs) {
+ input_report_key(tsdata->input, BTN_TOUCH, 1);
+ input_report_abs(tsdata->input, ABS_PRESSURE, 1);
+ input_report_abs(tsdata->input, ABS_X,
+ ((rdbuf[i*4+5] << 8) |
+ rdbuf[i*4+6]) & 0x0fff);
+ input_report_abs(tsdata->input, ABS_Y,
+ ((rdbuf[i*4+7] << 8) |
+ rdbuf[i*4+8]) & 0x0fff);
+ have_abs = 1;
+ }
+ input_report_abs(tsdata->input, ABS_MT_POSITION_X,
+ ((rdbuf[i*4+5] << 8) | rdbuf[i*4+6]) & 0x0fff);
+ input_report_abs(tsdata->input, ABS_MT_POSITION_Y,
+ ((rdbuf[i*4+7] << 8) | rdbuf[i*4+8]) & 0x0fff);
+ input_report_abs(tsdata->input, ABS_MT_TRACKING_ID,
+ (rdbuf[i*4+7] >> 4) & 0x0f);
+ input_mt_sync(tsdata->input);
+ }
+ if (!have_abs) {
+ input_report_key(tsdata->input, BTN_TOUCH, 0);
+ input_report_abs(tsdata->input, ABS_PRESSURE, 0);
+ }
+ input_sync(tsdata->input);
+
+out:
+ return IRQ_HANDLED;
+}
+
+
+static int edt_ft5x06_i2c_register_write(struct edt_ft5x06_i2c_ts_data *tsdata,
+ u8 addr, u8 value)
+{
+ u8 wrbuf[4];
+ int ret;
+
+ 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];
+
+ disable_irq(tsdata->irq);
+
+ ret = edt_ft5x06_ts_readwrite(tsdata->client,
+ 4, wrbuf,
+ 0, NULL);
+
+ enable_irq(tsdata->irq);
+
+ return ret;
+}
+
+static int edt_ft5x06_i2c_register_read(struct edt_ft5x06_i2c_ts_data *tsdata,
+ u8 addr)
+{
+ u8 wrbuf[2], rdbuf[2];
+ int ret;
+
+ wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc;
+ wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
+ wrbuf[1] |= tsdata->factory_mode ? 0x80 : 0x40;
+
+ disable_irq(tsdata->irq);
+
+ ret = edt_ft5x06_ts_readwrite(tsdata->client,
+ 2, wrbuf,
+ 2, rdbuf);
+
+ enable_irq(tsdata->irq);
+
+ 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 ret < 0 ? ret : rdbuf[0];
+}
+
+static ssize_t edt_ft5x06_i2c_setting_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct edt_ft5x06_i2c_ts_data *tsdata = dev_get_drvdata(dev);
+ struct i2c_client *client = tsdata->client;
+ int ret = 0;
+ int *value;
+ u8 addr;
+
+ switch (attr->attr.name[0]) {
+ case 't': /* threshold */
+ addr = WORK_REGISTER_THRESHOLD;
+ value = &tsdata->threshold;
+ break;
+ case 'g': /* gain */
+ addr = WORK_REGISTER_GAIN;
+ value = &tsdata->gain;
+ break;
+ case 'o': /* offset */
+ addr = WORK_REGISTER_OFFSET;
+ value = &tsdata->offset;
+ break;
+ case 'r': /* report rate */
+ addr = WORK_REGISTER_REPORT_RATE;
+ value = &tsdata->report_rate;
+ break;
+ default:
+ dev_err(&client->dev,
+ "unknown attribute for edt_ft5x06_i2c_setting_show: %s\n",
+ attr->attr.name);
+ return -EINVAL;
+ }
+
+ mutex_lock(&tsdata->mutex);
+
+ if (tsdata->factory_mode) {
+ dev_err(dev,
+ "setting register not available in factory mode\n");
+ mutex_unlock(&tsdata->mutex);
+ return -EIO;
+ }
+
+ ret = edt_ft5x06_i2c_register_read(tsdata, addr);
+ if (ret < 0) {
+ dev_err(&tsdata->client->dev,
+ "Unable to write to i2c touchscreen!\n");
+ mutex_unlock(&tsdata->mutex);
+ return ret;
+ }
+ mutex_unlock(&tsdata->mutex);
+
+ if (ret != *value) {
+ dev_info(&tsdata->client->dev,
+ "i2c read (%d) and stored value (%d) differ. Huh?\n",
+ ret, *value);
+ *value = ret;
+ }
+
+ return sprintf(buf, "%d\n", ret);
+}
+
+static ssize_t edt_ft5x06_i2c_setting_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct edt_ft5x06_i2c_ts_data *tsdata = dev_get_drvdata(dev);
+ struct i2c_client *client = tsdata->client;
+ int ret = 0;
+ u8 addr;
+ unsigned int val;
+
+ mutex_lock(&tsdata->mutex);
+
+ if (tsdata->factory_mode) {
+ dev_err(dev,
+ "setting register not available in factory mode\n");
+ ret = -EIO;
+ goto out;
+ }
+
+ if (sscanf(buf, "%u", &val) != 1) {
+ dev_err(dev, "Invalid value for attribute %s\n",
+ attr->attr.name);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ switch (attr->attr.name[0]) {
+ case 't': /* threshold */
+ addr = WORK_REGISTER_THRESHOLD;
+ val = val < 20 ? 20 : val > 80 ? 80 : val;
+ tsdata->threshold = val;
+ break;
+ case 'g': /* gain */
+ addr = WORK_REGISTER_GAIN;
+ val = val < 0 ? 0 : val > 31 ? 31 : val;
+ tsdata->gain = val;
+ break;
+ case 'o': /* offset */
+ addr = WORK_REGISTER_OFFSET;
+ val = val < 0 ? 0 : val > 31 ? 31 : val;
+ tsdata->offset = val;
+ break;
+ case 'r': /* report rate */
+ addr = WORK_REGISTER_REPORT_RATE;
+ val = val < 3 ? 3 : val > 14 ? 14 : val;
+ tsdata->report_rate = val;
+ break;
+ default:
+ dev_err(&client->dev,
+ "unknown attribute for edt_ft5x06_i2c_setting_show: %s\n",
+ attr->attr.name);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = edt_ft5x06_i2c_register_write(tsdata, addr, val);
+
+ if (ret < 0) {
+ dev_err(&tsdata->client->dev,
+ "Unable to write to i2c touchscreen!\n");
+ goto out;
+ }
+
+out:
+ mutex_unlock(&tsdata->mutex);
+ return ret < 0 ? ret : count;
+}
+
+
+static ssize_t edt_ft5x06_i2c_mode_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct edt_ft5x06_i2c_ts_data *tsdata = dev_get_drvdata(dev);
+ return sprintf(buf, "%d\n", tsdata->factory_mode ? 1 : 0);
+}
+
+static ssize_t edt_ft5x06_i2c_mode_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct edt_ft5x06_i2c_ts_data *tsdata = dev_get_drvdata(dev);
+ int i, ret = 0;
+ unsigned int mode;
+
+ if (sscanf(buf, "%u", &mode) != 1 || (mode | 1) != 1) {
+ dev_err(dev, "Invalid value for operation mode\n");
+ return -EINVAL;
+ }
+
+ /* no change, return without doing anything */
+ if (mode == tsdata->factory_mode)
+ return count;
+
+ mutex_lock(&tsdata->mutex);
+ if (!tsdata->factory_mode) { /* switch to factory mode */
+ disable_irq(tsdata->irq);
+ /* mode register is 0x3c when in the work mode */
+ ret = edt_ft5x06_i2c_register_write(tsdata,
+ WORK_REGISTER_OPMODE, 0x03);
+ if (ret < 0) {
+ dev_err(dev, "failed to switch to factory mode (%d)\n",
+ ret);
+ } else {
+ tsdata->factory_mode = 1;
+ for (i = 0; i < 10; i++) {
+ mdelay(5);
+ /* mode register is 0x01 when in factory mode */
+ ret = edt_ft5x06_i2c_register_read(tsdata, FACTORY_REGISTER_OPMODE);
+ if (ret == 0x03)
+ break;
+ }
+ if (i == 10)
+ dev_err(dev,
+ "not in factory mode after %dms.\n",
+ i*5);
+ }
+ } else { /* switch to work mode */
+ /* mode register is 0x01 when in the factory mode */
+ ret = edt_ft5x06_i2c_register_write(tsdata,
+ FACTORY_REGISTER_OPMODE,
+ 0x01);
+ if (ret < 0) {
+ dev_err(dev, "failed to switch to work mode (%d)\n",
+ ret);
+ } else {
+ tsdata->factory_mode = 0;
+ for (i = 0; i < 10; i++) {
+ mdelay(5);
+ /* mode register is 0x01 when in factory mode */
+ ret = edt_ft5x06_i2c_register_read(tsdata, WORK_REGISTER_OPMODE);
+ if (ret == 0x01)
+ break;
+ }
+ if (i == 10)
+ dev_err(dev, "not in work mode after %dms.\n",
+ i*5);
+
+ /* restore parameters */
+ edt_ft5x06_i2c_register_write(tsdata,
+ WORK_REGISTER_THRESHOLD,
+ tsdata->threshold);
+ edt_ft5x06_i2c_register_write(tsdata,
+ WORK_REGISTER_GAIN,
+ tsdata->gain);
+ edt_ft5x06_i2c_register_write(tsdata,
+ WORK_REGISTER_OFFSET,
+ tsdata->offset);
+ edt_ft5x06_i2c_register_write(tsdata,
+ WORK_REGISTER_REPORT_RATE,
+ tsdata->report_rate);
+
+ enable_irq(tsdata->irq);
+ }
+ }
+
+ mutex_unlock(&tsdata->mutex);
+ return count;
+}
+
+
+static ssize_t edt_ft5x06_i2c_raw_data_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct edt_ft5x06_i2c_ts_data *tsdata = dev_get_drvdata(dev);
+ int i, ret;
+ char *ptr, wrbuf[3];
+
+ if (!tsdata->factory_mode) {
+ dev_err(dev, "raw data not available in work mode\n");
+ return -EIO;
+ }
+
+ mutex_lock(&tsdata->mutex);
+ ret = edt_ft5x06_i2c_register_write(tsdata, 0x08, 0x01);
+ for (i = 0; i < 100; i++) {
+ ret = edt_ft5x06_i2c_register_read(tsdata, 0x08);
+ if (ret < 1)
+ break;
+ udelay(1000);
+ }
+
+ if (i == 100 || ret < 0) {
+ dev_err(dev, "waiting time exceeded or error: %d\n", ret);
+ mutex_unlock(&tsdata->mutex);
+ return ret < 0 ? ret : -ETIMEDOUT;
+ }
+
+ ptr = buf;
+ wrbuf[0] = 0xf5;
+ wrbuf[1] = 0x0e;
+ for (i = 0; i <= tsdata->num_x; i++) {
+ wrbuf[2] = i;
+ ret = edt_ft5x06_ts_readwrite(tsdata->client,
+ 3, wrbuf,
+ tsdata->num_y * 2, ptr);
+ if (ret < 0) {
+ mutex_unlock(&tsdata->mutex);
+ return ret;
+ }
+
+ ptr += tsdata->num_y * 2;
+ }
+
+ mutex_unlock(&tsdata->mutex);
+ return ptr - buf;
+}
+
+
+static DEVICE_ATTR(gain, 0664,
+ edt_ft5x06_i2c_setting_show, edt_ft5x06_i2c_setting_store);
+static DEVICE_ATTR(offset, 0664,
+ edt_ft5x06_i2c_setting_show, edt_ft5x06_i2c_setting_store);
+static DEVICE_ATTR(threshold, 0664,
+ edt_ft5x06_i2c_setting_show, edt_ft5x06_i2c_setting_store);
+static DEVICE_ATTR(report_rate, 0664,
+ edt_ft5x06_i2c_setting_show, edt_ft5x06_i2c_setting_store);
+static DEVICE_ATTR(mode, 0664,
+ edt_ft5x06_i2c_mode_show, edt_ft5x06_i2c_mode_store);
+static DEVICE_ATTR(raw_data, 0444,
+ edt_ft5x06_i2c_raw_data_show, NULL);
+
+static struct attribute *edt_ft5x06_i2c_attrs[] = {
+ &dev_attr_gain.attr,
+ &dev_attr_offset.attr,
+ &dev_attr_threshold.attr,
+ &dev_attr_report_rate.attr,
+ &dev_attr_mode.attr,
+ &dev_attr_raw_data.attr,
+ NULL
+};
+
+static const struct attribute_group edt_ft5x06_i2c_attr_group = {
+ .attrs = edt_ft5x06_i2c_attrs,
+};
+
+static int edt_ft5x06_i2c_ts_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+
+ struct edt_ft5x06_i2c_ts_data *tsdata;
+ struct edt_ft5x06_platform_data *pdata;
+ struct input_dev *input;
+ int error;
+ u8 rdbuf[23];
+ char *model_name, *fw_version;
+
+ dev_dbg(&client->dev, "probing for EDT FT5x06 I2C\n");
+
+ if (!client->dev.platform_data) {
+ dev_err(&client->dev, "no platform data?\n");
+ return -ENODEV;
+ }
+
+ tsdata = kzalloc(sizeof(*tsdata), GFP_KERNEL);
+ if (!tsdata) {
+ dev_err(&client->dev, "failed to allocate driver data!\n");
+ dev_set_drvdata(&client->dev, NULL);
+ return -ENOMEM;
+ }
+
+ dev_set_drvdata(&client->dev, tsdata);
+ tsdata->client = client;
+ pdata = client->dev.platform_data;
+
+ tsdata->reset_pin = pdata->reset_pin;
+ mutex_init(&tsdata->mutex);
+
+ if (tsdata->reset_pin >= 0) {
+ error = gpio_request(tsdata->reset_pin, "edt-ft5x06 reset");
+ if (error < 0) {
+ dev_err(&client->dev,
+ "Failed to request GPIO %d as reset pin, error %d\n",
+ tsdata->reset_pin, error);
+ goto err_free_tsdata;
+ }
+
+ /* this pulls reset down, enabling the low active reset */
+ if (gpio_direction_output(tsdata->reset_pin, 0) < 0) {
+ dev_info(&client->dev, "switching to output failed\n");
+ goto err_free_reset_pin;
+ }
+ }
+
+ /* request IRQ pin */
+ tsdata->irq_pin = pdata->irq_pin;
+ tsdata->irq = gpio_to_irq(tsdata->irq_pin);
+
+ error = gpio_request(tsdata->irq_pin, "edt-ft5x06 irq");
+ if (error < 0) {
+ dev_err(&client->dev,
+ "Failed to request GPIO %d for IRQ %d, error %d\n",
+ tsdata->irq_pin, tsdata->irq, error);
+ goto err_free_reset_pin;
+ }
+ gpio_direction_input(tsdata->irq_pin);
+
+ if (tsdata->reset_pin >= 0) {
+ /* release reset */
+ mdelay(50);
+ gpio_set_value(tsdata->reset_pin, 1);
+ mdelay(100);
+ }
+
+ mutex_lock(&tsdata->mutex);
+
+ tsdata->factory_mode = 0;
+
+ if (edt_ft5x06_ts_readwrite(client, 1, "\xbb", 22, rdbuf) < 0) {
+ dev_err(&client->dev, "probing failed\n");
+ error = -ENODEV;
+ goto err_free_irq_pin;
+ }
+
+ tsdata->threshold = edt_ft5x06_i2c_register_read(tsdata,
+ WORK_REGISTER_THRESHOLD);
+ tsdata->gain = edt_ft5x06_i2c_register_read(tsdata,
+ WORK_REGISTER_GAIN);
+ tsdata->offset = edt_ft5x06_i2c_register_read(tsdata,
+ WORK_REGISTER_OFFSET);
+ tsdata->report_rate = edt_ft5x06_i2c_register_read(tsdata,
+ WORK_REGISTER_REPORT_RATE);
+ tsdata->num_x = edt_ft5x06_i2c_register_read(tsdata,
+ WORK_REGISTER_NUM_X);
+ tsdata->num_y = edt_ft5x06_i2c_register_read(tsdata,
+ WORK_REGISTER_NUM_Y);
+
+ mutex_unlock(&tsdata->mutex);
+
+ /* remove last '$' end marker */
+ rdbuf[22] = '\0';
+ if (rdbuf[21] == '$')
+ rdbuf[21] = '\0';
+
+ model_name = rdbuf + 1;
+ /* look for Model/Version separator */
+ fw_version = strchr(rdbuf, '*');
+
+ if (fw_version) {
+ fw_version[0] = '\0';
+ fw_version++;
+ dev_info(&client->dev,
+ "Model \"%s\", Rev. \"%s\", %dx%d sensors\n",
+ model_name, fw_version, tsdata->num_x, tsdata->num_y);
+ } else {
+ dev_info(&client->dev, "Product ID \"%s\"\n", model_name);
+ }
+
+ input = input_allocate_device();
+ if (!input) {
+ dev_err(&client->dev, "failed to allocate input device!\n");
+ error = -ENOMEM;
+ goto err_free_irq_pin;
+ }
+
+ __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_PRESSURE, 0, 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);
+ input_set_abs_params(input, ABS_MT_TRACKING_ID, 0, 15, 0, 0);
+
+ input->name = kstrdup(model_name, GFP_NOIO);
+ input->id.bustype = BUS_I2C;
+ input->dev.parent = &client->dev;
+
+ input_set_drvdata(input, tsdata);
+
+ tsdata->input = input;
+
+ error = input_register_device(input);
+ if (error)
+ goto err_free_input_device;
+
+ if (request_threaded_irq(tsdata->irq, NULL, edt_ft5x06_ts_isr,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ client->name, tsdata)) {
+ dev_err(&client->dev, "Unable to request touchscreen IRQ.\n");
+ input = NULL;
+ error = -ENOMEM;
+ goto err_unregister_device;
+ }
+
+ error = sysfs_create_group(&client->dev.kobj,
+ &edt_ft5x06_i2c_attr_group);
+ if (error)
+ goto err_free_irq;
+
+ device_init_wakeup(&client->dev, 1);
+
+ dev_dbg(&tsdata->client->dev,
+ "EDT FT5x06 initialized: IRQ pin %d, Reset pin %d.\n",
+ tsdata->irq_pin, tsdata->reset_pin);
+
+ return 0;
+
+err_free_irq:
+ free_irq(tsdata->irq, tsdata);
+err_unregister_device:
+ input_unregister_device(input);
+ input = NULL;
+err_free_input_device:
+ if (input) {
+ kfree(input->name);
+ input_free_device(input);
+ }
+err_free_irq_pin:
+ gpio_free(tsdata->irq_pin);
+err_free_reset_pin:
+ if (tsdata->reset_pin >= 0)
+ gpio_free(tsdata->reset_pin);
+err_free_tsdata:
+ kfree(tsdata);
+ return error;
+}
+
+static int edt_ft5x06_i2c_ts_remove(struct i2c_client *client)
+{
+ struct edt_ft5x06_i2c_ts_data *tsdata = dev_get_drvdata(&client->dev);
+
+ sysfs_remove_group(&client->dev.kobj, &edt_ft5x06_i2c_attr_group);
+
+ free_irq(tsdata->irq, tsdata);
+ kfree(tsdata->input->name);
+ input_unregister_device(tsdata->input);
+ gpio_free(tsdata->irq_pin);
+ if (tsdata->reset_pin >= 0)
+ gpio_free(tsdata->reset_pin);
+ kfree(tsdata);
+
+ return 0;
+}
+
+static int edt_ft5x06_i2c_ts_suspend(struct device *dev)
+{
+ struct edt_ft5x06_i2c_ts_data *tsdata = dev_get_drvdata(dev);
+
+ if (device_may_wakeup(dev))
+ enable_irq_wake(tsdata->irq);
+
+ return 0;
+}
+
+static int edt_ft5x06_i2c_ts_resume(struct device *dev)
+{
+ struct edt_ft5x06_i2c_ts_data *tsdata = dev_get_drvdata(dev);
+
+ if (device_may_wakeup(dev))
+ disable_irq_wake(tsdata->irq);
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(edt_ft5x06_i2c_ts_pm_ops,
+ edt_ft5x06_i2c_ts_suspend, edt_ft5x06_i2c_ts_resume);
+
+static const struct i2c_device_id edt_ft5x06_i2c_ts_id[] = {
+ { "edt-ft5x06", 0 },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(i2c, edt_ft5x06_i2c_ts_id);
+
+static struct i2c_driver edt_ft5x06_i2c_ts_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "edt_ft5x06_i2c",
+ .pm = &edt_ft5x06_i2c_ts_pm_ops,
+ },
+ .id_table = edt_ft5x06_i2c_ts_id,
+ .probe = edt_ft5x06_i2c_ts_probe,
+ .remove = edt_ft5x06_i2c_ts_remove,
+};
+
+static int __init edt_ft5x06_i2c_ts_init(void)
+{
+ return i2c_add_driver(&edt_ft5x06_i2c_ts_driver);
+}
+module_init(edt_ft5x06_i2c_ts_init);
+
+static void __exit edt_ft5x06_i2c_ts_exit(void)
+{
+ i2c_del_driver(&edt_ft5x06_i2c_ts_driver);
+}
+module_exit(edt_ft5x06_i2c_ts_exit);
+
+MODULE_AUTHOR("Simon Budig <simon.budig@kernelconcepts.de>");
+MODULE_DESCRIPTION("EDT FT5x06 I2C Touchscreen Driver");
+MODULE_LICENSE("GPL");
projects / karo-tx-linux.git / commitdiff