> -----Original Message----- > From: linux-input-owner@xxxxxxxxxxxxxxx [mailto:linux-input- > owner@xxxxxxxxxxxxxxx] On Behalf Of Naveen Kumar G > Sent: Friday, October 01, 2010 4:30 PM > To: Dmitry Torokhov > Cc: STEricsson_nomadik_linux@xxxxxxxxxxx; linux-input@xxxxxxxxxxxxxxx; > tsoni@xxxxxxxxxxxxxx; rydberg@xxxxxxxxxxx; Naveen Kumar Gaddipati > Subject: [PATCHv5] input: ROHM BU21013 touch panel controller support > > From: Naveen Kumar Gaddipati <naveen.gaddipati@xxxxxxxxxxxxxx> > > Added the ROHM BU21013 capacitive touch panel controller > driver support with i2c interface. > > Acked-by: Linus Walleij <linus.walleij@xxxxxxxxxxxxxx> > Signed-off-by: Naveen Kumar Gaddipati <naveen.gaddipati@xxxxxxxxxxxxxx> > --- > Changes in v5: > -Update according to Henrik comments on v4 > > drivers/input/touchscreen/Kconfig | 12 + > drivers/input/touchscreen/Makefile | 1 + > drivers/input/touchscreen/bu21013_ts.c | 628 > ++++++++++++++++++++++++++++++++ > include/linux/input/bu21013.h | 44 +++ > 4 files changed, 685 insertions(+), 0 deletions(-) > create mode 100755 drivers/input/touchscreen/bu21013_ts.c Think this is not needed > create mode 100644 include/linux/input/bu21013.h > > diff --git a/drivers/input/touchscreen/Kconfig > b/drivers/input/touchscreen/Kconfig > index 0069d97..2380533 100644 > --- a/drivers/input/touchscreen/Kconfig > +++ b/drivers/input/touchscreen/Kconfig > @@ -98,6 +98,18 @@ config TOUCHSCREEN_BITSY > To compile this driver as a module, choose M here: the > module will be called h3600_ts_input. > > +config TOUCHSCREEN_BU21013 > + tristate "BU21013 based touch panel controllers" > + depends on I2C > + help > + Say Y here if you have a bu21013 touchscreen connected to > + your system. > + > + If unsure, say N. > + > + To compile this driver as a module, choose M here: the > + module will be called bu21013_ts. > + > config TOUCHSCREEN_CY8CTMG110 > tristate "cy8ctmg110 touchscreen" > depends on I2C > diff --git a/drivers/input/touchscreen/Makefile > b/drivers/input/touchscreen/Makefile > index 28217e1..a0a2021 100644 > --- a/drivers/input/touchscreen/Makefile > +++ b/drivers/input/touchscreen/Makefile > @@ -14,6 +14,7 @@ obj-$(CONFIG_TOUCHSCREEN_AD7879_SPI) += ad7879- > spi.o > obj-$(CONFIG_TOUCHSCREEN_ADS7846) += ads7846.o > obj-$(CONFIG_TOUCHSCREEN_ATMEL_TSADCC) += atmel_tsadcc.o > obj-$(CONFIG_TOUCHSCREEN_BITSY) += h3600_ts_input.o > +obj-$(CONFIG_TOUCHSCREEN_BU21013) += bu21013_ts.o > obj-$(CONFIG_TOUCHSCREEN_CY8CTMG110) += cy8ctmg110_ts.o > obj-$(CONFIG_TOUCHSCREEN_DA9034) += da9034-ts.o > obj-$(CONFIG_TOUCHSCREEN_DYNAPRO) += dynapro.o > diff --git a/drivers/input/touchscreen/bu21013_ts.c > b/drivers/input/touchscreen/bu21013_ts.c > new file mode 100755 > index 0000000..1008037 > --- /dev/null > +++ b/drivers/input/touchscreen/bu21013_ts.c > @@ -0,0 +1,628 @@ > +/* > + * Copyright (C) ST-Ericsson SA 2010 > + * Author: Naveen Kumar G <naveen.gaddipati@xxxxxxxxxxxxxx> 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> > + > +#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 > + * > + * Touch panel device data structure > + */ > +struct bu21013_ts_data { > + struct i2c_client *client; > + wait_queue_head_t wait; > + bool touch_stopped; > + const struct bu21013_platform_device *chip; > + struct input_dev *in_dev; > + unsigned int intr_pin; > +}; > + > +/** > + * 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 == 2 && > + (abs(pos_x[0] - pos_x[1]) < DELTA_MIN || > + abs(pos_y[0] - pos_y[1]) < DELTA_MIN)) > + return 0; > + > + if (finger_down_count <= 0) { > + input_report_abs(data->in_dev, ABS_MT_TOUCH_MAJOR, 0); > + input_mt_sync(data->in_dev); > + } else { > + 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_TOUCH_MAJOR, > + max(pos_x[i], 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); > + } > + } > + 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 = data->chip->irq_read_val(); > + 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 retval; > +} > + > +/** > + * bu21013_probe() - initialzes 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 __devinit bu21013_probe(struct i2c_client *client, > + const struct i2c_device_id *id) > +{ > + int retval; > + struct bu21013_ts_data *bu21013_data; > + struct input_dev *in_dev; > + const struct bu21013_platform_device *pdata = > + client->dev.platform_data; > + > + 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) { > + dev_err(&client->dev, "platform data not defined\n"); > + retval = -EINVAL; > + return retval; > + } > + > + bu21013_data = kzalloc(sizeof(struct bu21013_ts_data), GFP_KERNEL); > + if (!bu21013_data) { > + dev_err(&client->dev, "device memory alloc failed\n"); > + retval = -ENOMEM; > + return retval; > + } > + /* allocate input device */ > + in_dev = input_allocate_device(); > + if (!in_dev) { > + dev_err(&client->dev, "input device memory alloc failed\n"); > + retval = -ENOMEM; > + goto err_alloc; > + } > + bu21013_data->in_dev = in_dev; > + bu21013_data->chip = pdata; > + bu21013_data->client = client; > + > + /* configure the gpio pins */ > + if (pdata->cs_en) { > + retval = pdata->cs_en(pdata->cs_pin); > + if (retval < 0) { > + dev_err(&client->dev, "chip init failed\n"); > + goto err_init_cs; > + } > + } > + > + /* configure the touch panel controller */ > + retval = bu21013_init_chip(bu21013_data); > + if (retval < 0) { > + dev_err(&client->dev, "error in bu21013 config\n"); > + goto err_init_config; > + } > + > + init_waitqueue_head(&bu21013_data->wait); > + bu21013_data->touch_stopped = false; > + > + /* 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->x_max_res, 0, 0); > + input_set_abs_params(in_dev, ABS_MT_POSITION_Y, 0, > + pdata->y_max_res, 0, 0); > + input_set_abs_params(in_dev, ABS_MT_TOUCH_MAJOR, 0, > + max(pdata->x_max_res , pdata->y_max_res), 0, 0); > + input_set_drvdata(in_dev, bu21013_data); > + retval = input_register_device(in_dev); > + if (retval) > + goto err_input_register; > + > + retval = request_threaded_irq(pdata->irq, NULL, bu21013_gpio_irq, > + (IRQF_TRIGGER_FALLING | IRQF_SHARED), > + DRIVER_TP, bu21013_data); > + if (retval) { > + dev_err(&client->dev, "request irq %d failed\n", pdata->irq); > + goto err_init_irq; > + } > + > + device_init_wakeup(&client->dev, pdata->wakeup); > + i2c_set_clientdata(client, bu21013_data); > + > + return retval; > + > +err_init_irq: > + input_unregister_device(bu21013_data->in_dev); > + bu21013_data->in_dev = NULL; > +err_input_register: > +err_init_config: > + pdata->cs_dis(pdata->cs_pin); > +err_init_cs: > + input_free_device(bu21013_data->in_dev); > +err_alloc: > + kfree(bu21013_data); > + > + return retval; > +} > +/** > + * 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 __devexit bu21013_remove(struct i2c_client *client) > +{ > + struct bu21013_ts_data *bu21013_data = i2c_get_clientdata(client); > + > + bu21013_data->touch_stopped = true; > + wake_up(&bu21013_data->wait); > + device_init_wakeup(&client->dev, false); > + free_irq(bu21013_data->chip->irq, bu21013_data); > + bu21013_data->chip->cs_dis(bu21013_data->chip->cs_pin); > + input_unregister_device(bu21013_data->in_dev); > + 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->chip->irq); > + else > + disable_irq(bu21013_data->chip->irq); > + > + 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 = 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->chip->irq); > + else > + enable_irq(bu21013_data->chip->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, > + .owner = THIS_MODULE, > +#ifdef CONFIG_PM > + .pm = &bu21013_dev_pm_ops, > +#endif > + }, > + .probe = bu21013_probe, > + .remove = __devexit_p(bu21013_remove), > + .id_table = bu21013_id, > +}; > + > +/** > + * bu21013_init() - initializes the bu21013 touchscreen driver > + * > + * This function used to initializes the bu21013 > + * touchscreen driver and returns integer. > + */ > +static int __init bu21013_init(void) > +{ > + return i2c_add_driver(&bu21013_driver); > +} > + > +/** > + * bu21013_exit() - de-initializes the bu21013 touchscreen driver > + * > + * This function uses to de-initializes the bu21013 > + * touchscreen driver and returns none. > + */ > +static void __exit bu21013_exit(void) > +{ > + i2c_del_driver(&bu21013_driver); > +} > + > +module_init(bu21013_init); > +module_exit(bu21013_exit); > + > +MODULE_LICENSE("GPL v2"); > +MODULE_AUTHOR("Naveen Kumar G <naveen.gaddipati@xxxxxxxxxxxxxx>"); > +MODULE_DESCRIPTION("bu21013 touch screen controller driver"); > diff --git a/include/linux/input/bu21013.h b/include/linux/input/bu21013.h > new file mode 100644 > index 0000000..e470d38 > --- /dev/null > +++ b/include/linux/input/bu21013.h > @@ -0,0 +1,44 @@ > +/* > + * Copyright (C) ST-Ericsson SA 2010 > + * Author: Naveen Kumar G <naveen.gaddipati@xxxxxxxxxxxxxx> for ST- > Ericsson > + * License terms:GNU General Public License (GPL) version 2 > + */ > + > +#ifndef _BU21013_H > +#define _BU21013_H > + > +/** > + * struct bu21013_platform_device - Handle the platform data > + * @cs_en: pointer to the cs enable function > + * @cs_dis: pointer to the cs disable function > + * @irq_read_val: pointer to read the pen irq value function > + * @x_max_res: xmax resolution > + * @y_max_res: ymax resolution > + * @touch_x_max: touch x max > + * @touch_y_max: touch y max > + * @cs_pin: chip select pin > + * @irq: irq pin > + * @ext_clk: external clock flag > + * @x_flip: x flip flag > + * @y_flip: y flip flag > + * @wakeup: wakeup flag > + * > + * This is used to handle the platform data > + */ > +struct bu21013_platform_device { > + int (*cs_en)(int reset_pin); > + int (*cs_dis)(int reset_pin); > + int (*irq_read_val)(void); > + int x_max_res; > + int y_max_res; > + int touch_x_max; > + int touch_y_max; > + unsigned int cs_pin; > + unsigned int irq; > + bool ext_clk; > + bool x_flip; > + bool y_flip; > + bool wakeup; > +}; > + > +#endif > -- > 1.7.2.dirty > > -- > To unsubscribe from this list: send the line "unsubscribe linux-input" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
