From: Ramesh Agarwal <ramesh.agarwal@xxxxxxxxx>
Driver for the Synaptics TM1217 touchscreen controller, connected via an SPI
and GPIO interface.
Some clean up by Alan Cox
- Extract gpio support and IRQ support more sanely
- Tidying
Signed-off-by: Ramesh Agarwal <ramesh.agarwal@xxxxxxxxx>
---
drivers/input/touchscreen/Kconfig | 12
drivers/input/touchscreen/Makefile | 1
drivers/input/touchscreen/clearpad_tm1217.c | 674 +++++++++++++++++++++++++++
include/linux/spi/cp_tm1217.h | 9
4 files changed, 696 insertions(+), 0 deletions(-)
create mode 100644 drivers/input/touchscreen/clearpad_tm1217.c
create mode 100644 include/linux/spi/cp_tm1217.h
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 8393f47..0aa3c0b 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -626,4 +626,16 @@ config TOUCHSCREEN_CY8CTMG110
To compile this driver as a module, choose M here: the
module will be called cy8ctmg110_ts.
+config TOUCHSCREEN_CLEARPAD_TM1217
+ tristate "Synaptics Clearpad TM1217"
+ depends on I2C
+ depends on GPIOLIB
+ help
+ Say Y here if you have a Synaptics Clearpad TM1217 Controller
+
+ If unsure, say N.
+
+ To compile this driver as a module, choose M here: the
+ module will be called clearpad_tm1217.
+
endif
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 662d066..fd6720a 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -15,6 +15,7 @@ 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_CY8CTMG110) += cy8ctmg110_ts.o
+obj-$(CONFIG_TOUCHSCREEN_CLEARPAD_TM1217) += clearpad_tm1217.o
obj-$(CONFIG_TOUCHSCREEN_DYNAPRO) += dynapro.o
obj-$(CONFIG_TOUCHSCREEN_HAMPSHIRE) += hampshire.o
obj-$(CONFIG_TOUCHSCREEN_GUNZE) += gunze.o
diff --git a/drivers/input/touchscreen/clearpad_tm1217.c b/drivers/input/touchscreen/clearpad_tm1217.c
new file mode 100644
index 0000000..de3e62c
--- /dev/null
+++ b/drivers/input/touchscreen/clearpad_tm1217.c
@@ -0,0 +1,674 @@
+/*
+ * clearpad_tm1217.c - Touch Screen driver for Synaptics Clearpad
+ * TM1217 controller
+ *
+ * Copyright (C) 2008 Intel Corp
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * 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 program; ifnot, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * Questions/Comments/Bug fixes to Ramesh Agarwal (ramesh.agarwal@xxxxxxxxx)
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/i2c.h>
+#include <linux/timer.h>
+#include <linux/gpio.h>
+#include <linux/hrtimer.h>
+#include <linux/kthread.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/spi/cp_tm1217.h>
+
+#define CPTM1217_DEVICE_NAME "cptm1217"
+#define CPTM1217_DRIVER_NAME CPTM1217_DEVICE_NAME
+
+#define MAX_TOUCH_SUPPORTED 2
+#define TOUCH_SUPPORTED 1
+#define SAMPLING_FREQ 80 /* Frequency in HZ */
+#define DELAY_BTWIN_SAMPLE (1000 / SAMPLING_FREQ)
+#define WAIT_FOR_RESPONSE 5 /* 5msec just works */
+#define MAX_RETRIES 5 /* As above */
+#define INCREMENTAL_DELAY 5 /* As above */
+
+/* Regster Definitions */
+#define TMA1217_DEV_STATUS 0x13 /* Device Status */
+#define TMA1217_INT_STATUS 0x14 /* Interrupt Status */
+
+/* Controller can detect upto 2 possible finger touches.
+ * Each finger touch provides 12 bit X Y co-ordinates, the values are split
+ * across 2 registers, and an 8 bit Z value */
+#define TMA1217_FINGER_STATE 0x18 /* Finger State */
+#define TMA1217_FINGER1_X_HIGHER8 0x19 /* Higher 8 bit of X coordinate */
+#define TMA1217_FINGER1_Y_HIGHER8 0x1A /* Higher 8 bit of Y coordinate */
+#define TMA1217_FINGER1_XY_LOWER4 0x1B /* Lower 4 bits of X and Y */
+#define TMA1217_FINGER1_Z_VALUE 0x1D /* 8 bit Z value for finger 1 */
+#define TMA1217_FINGER2_X_HIGHER8 0x1E /* Higher 8 bit of X coordinate */
+#define TMA1217_FINGER2_Y_HIGHER8 0x1F /* Higher 8 bit of Y coordinate */
+#define TMA1217_FINGER2_XY_LOWER4 0x20 /* Lower 4 bits of X and Y */
+#define TMA1217_FINGER2_Z_VALUE 0x22 /* 8 bit Z value for finger 2 */
+#define TMA1217_DEVICE_CTRL 0x23 /* Device Control */
+#define TMA1217_INTERRUPT_ENABLE 0x24 /* Interrupt Enable */
+#define TMA1217_REPORT_MODE 0x2B /* Reporting Mode */
+#define TMA1217_MAX_X_LOWER8 0x31 /* Bit 0-7 for Max X */
+#define TMA1217_MAX_X_HIGHER4 0x32 /* Bit 8-11 for Max X */
+#define TMA1217_MAX_Y_LOWER8 0x33 /* Bit 0-7 for Max Y */
+#define TMA1217_MAX_Y_HIGHER4 0x34 /* Bit 8-11 for Max Y */
+#define TMA1217_DEVICE_CMD_RESET 0x67 /* Device CMD reg for reset */
+#define TMA1217_DEVICE_CMD_REZERO 0x69 /* Device CMD reg for rezero */
+
+#define TMA1217_MANUFACTURER_ID 0x73 /* Manufacturer Id */
+#define TMA1217_PRODUCT_FAMILY 0x75 /* Product Family */
+#define TMA1217_FIRMWARE_REVISION 0x76 /* Firmware Revision */
+#define TMA1217_SERIAL_NO_HIGH 0x7C /* Bit 8-15 of device serial no. */
+#define TMA1217_SERIAL_NO_LOW 0x7D /* Bit 0-7 of device serial no. */
+#define TMA1217_PRODUCT_ID_START 0x7E /* Start address for 10 byte ID */
+#define TMA1217_DEVICE_CAPABILITY 0x8B /* Reporting capability */
+
+
+/*
+ * The touch position structure.
+ */
+struct touch_state {
+ int x;
+ int y;
+ bool button;
+};
+
+/* Device Specific info given by the controller */
+struct cp_dev_info {
+ u16 maxX;
+ u16 maxY;
+};
+
+/* Vendor related info given by the controller */
+struct cp_vendor_info {
+ u8 vendor_id;
+ u8 product_family;
+ u8 firmware_rev;
+ u16 serial_no;
+};
+
+/*
+ * Private structure to store the device details
+ */
+struct cp_tm1217_device {
+ struct i2c_client *client;
+ struct device *dev;
+ struct cp_vendor_info vinfo;
+ struct cp_dev_info dinfo;
+ struct input_dev_info {
+ char phys[32];
+ char name[128];
+ struct input_dev *input;
+ struct touch_state touch;
+ } cp_input_info[MAX_TOUCH_SUPPORTED];
+
+ int thread_running;
+ struct mutex thread_mutex;
+
+ int gpio;
+};
+
+
+/* The following functions are used to read/write registers on the device
+ * as per the RMI prorocol. Technically, a page select should be written
+ * before doing read/write but since the register offsets are below 0xFF
+ * we can use the default value of page which is 0x00
+ */
+static int cp_tm1217_read(struct cp_tm1217_device *ts,
+ u8 *req, int size)
+{
+ int i, retval;
+
+ /* Send the address */
+ retval = i2c_master_send(ts->client, &req[0], 1);
+ if (retval != 1) {
+ dev_err(ts->dev, "cp_tm1217: I2C send failed\n");
+ return retval;
+ }
+ msleep(WAIT_FOR_RESPONSE);
+ for (i = 0; i < MAX_RETRIES; i++) {
+ retval = i2c_master_recv(ts->client, &req[1], size);
+ if (retval == size) {
+ break;
+ } else {
+ msleep(INCREMENTAL_DELAY);
+ dev_dbg(ts->dev, "cp_tm1217: Retry count is %d\n", i);
+ }
+ }
+ if (retval != size)
+ dev_err(ts->dev, "cp_tm1217: Read from device failed\n");
+
+ return retval;
+}
+
+static int cp_tm1217_write(struct cp_tm1217_device *ts,
+ u8 *req, int size)
+{
+ int retval;
+
+ /* Send the address and the data to be written */
+ retval = i2c_master_send(ts->client, &req[0], size + 1);
+ if (retval != size + 1) {
+ dev_err(ts->dev, "cp_tm1217: I2C write failed: %d\n", retval);
+ return retval;
+ }
+ /* Wait for the write to complete. TBD why this is required */
+ msleep(WAIT_FOR_RESPONSE);
+
+ return size;
+}
+
+static int cp_tm1217_mask_interrupt(struct cp_tm1217_device *ts)
+{
+ u8 req[2];
+ int retval;
+
+ req[0] = TMA1217_INTERRUPT_ENABLE;
+ req[1] = 0x0;
+ retval = cp_tm1217_write(ts, req, 1);
+ if (retval != 1)
+ return -EIO;
+
+ return 0;
+}
+
+static int cp_tm1217_unmask_interrupt(struct cp_tm1217_device *ts)
+{
+ u8 req[2];
+ int retval;
+
+ req[0] = TMA1217_INTERRUPT_ENABLE;
+ req[1] = 0xa;
+ retval = cp_tm1217_write(ts, req, 1);
+ if (retval != 1)
+ return -EIO;
+
+ return 0;
+}
+
+static void process_touch(struct cp_tm1217_device *ts, int index)
+{
+ int retval;
+ struct input_dev_info *input_info =
+ (struct input_dev_info *)&ts->cp_input_info[index];
+ u8 xy_data[6];
+
+ if (index == 0)
+ xy_data[0] = TMA1217_FINGER1_X_HIGHER8;
+ else
+ xy_data[0] = TMA1217_FINGER2_X_HIGHER8;
+
+ retval = cp_tm1217_read(ts, xy_data, 5);
+ if (retval < 5) {
+ dev_err(ts->dev, "cp_tm1217: XY read from device failed\n");
+ return;
+ }
+
+ /* Note: Currently not using the Z values but may be requried in
+ the future. */
+ input_info->touch.x = (xy_data[1] << 4)
+ | (xy_data[3] & 0x0F);
+ input_info->touch.y = (xy_data[2] << 4)
+ | ((xy_data[3] & 0xF0) >> 4);
+ input_report_abs(input_info->input, ABS_X, input_info->touch.x);
+ input_report_abs(input_info->input, ABS_Y, input_info->touch.y);
+ input_sync(input_info->input);
+}
+
+static void cp_tm1217_get_data(struct cp_tm1217_device *ts)
+{
+ u8 req[2];
+ int retval, i, finger_touched;
+
+ do {
+ req[0] = TMA1217_FINGER_STATE;
+ retval = cp_tm1217_read(ts, req, 1);
+ if (retval != 1) {
+ dev_err(ts->dev,
+ "cp_tm1217: Read from device failed\n");
+ continue;
+ }
+ finger_touched = 0;
+ /* Start sampling until the pressure is below
+ threshold */
+ for (i = 0; i < TOUCH_SUPPORTED; i++) {
+ if (req[1] & 0x3) {
+ finger_touched++;
+ if (ts->cp_input_info[i].touch.button == 0) {
+ /* send the button touch event */
+ input_report_key(
+ ts->cp_input_info[i].input,
+ BTN_TOUCH, 1);
+ ts->cp_input_info[i].touch.button = 1;
+ }
+ process_touch(ts, i);
+ } else {
+ if (ts->cp_input_info[i].touch.button == 1) {
+ /* send the button release event */
+ input_report_key(
+ ts->cp_input_info[i].input,
+ BTN_TOUCH, 0);
+ ts->cp_input_info[i].touch.button = 0;
+ }
+ }
+ req[1] = req[1] >> 2;
+ }
+ msleep(DELAY_BTWIN_SAMPLE);
+ } while (finger_touched > 0);
+}
+
+static irqreturn_t cp_tm1217_sample_thread(int irq, void *handle)
+{
+ struct cp_tm1217_device *ts = (struct cp_tm1217_device *) handle;
+ u8 req[2];
+ int retval;
+
+ /* Chedk if another thread is already running */
+ mutex_lock(&ts->thread_mutex);
+ if (ts->thread_running == 1) {
+ mutex_unlock(&ts->thread_mutex);
+ return IRQ_HANDLED;
+ } else {
+ ts->thread_running = 1;
+ mutex_unlock(&ts->thread_mutex);
+ }
+
+ /* Mask the interrupts */
+ retval = cp_tm1217_mask_interrupt(ts);
+
+ /* Read the Interrupt Status register to find the cause of the
+ Interrupt */
+ req[0] = TMA1217_INT_STATUS;
+ retval = cp_tm1217_read(ts, req, 1);
+ if (retval != 1)
+ goto exit_thread;
+
+ if (!(req[1] & 0x8))
+ goto exit_thread;
+
+ cp_tm1217_get_data(ts);
+
+exit_thread:
+ /* Unmask the interrupts before going to sleep */
+ retval = cp_tm1217_unmask_interrupt(ts);
+
+ mutex_lock(&ts->thread_mutex);
+ ts->thread_running = 0;
+ mutex_unlock(&ts->thread_mutex);
+
+ return IRQ_HANDLED;
+}
+
+static int cp_tm1217_init_data(struct cp_tm1217_device *ts)
+{
+ int retval;
+ u8 req[2];
+
+ /* Read the vendor id/ fw revision etc. Ignoring return check as this
+ is non critical info */
+ req[0] = TMA1217_MANUFACTURER_ID;
+ retval = cp_tm1217_read(ts, req, 1);
+ ts->vinfo.vendor_id = req[1];
+
+ req[0] = TMA1217_PRODUCT_FAMILY;
+ retval = cp_tm1217_read(ts, req, 1);
+ ts->vinfo.product_family = req[1];
+
+ req[0] = TMA1217_FIRMWARE_REVISION;
+ retval = cp_tm1217_read(ts, req, 1);
+ ts->vinfo.firmware_rev = req[1];
+
+ req[0] = TMA1217_SERIAL_NO_HIGH;
+ retval = cp_tm1217_read(ts, req, 1);
+ ts->vinfo.serial_no = (req[1] << 8);
+
+ req[0] = TMA1217_SERIAL_NO_LOW;
+ retval = cp_tm1217_read(ts, req, 1);
+ ts->vinfo.serial_no = ts->vinfo.serial_no | req[1];
+
+ req[0] = TMA1217_MAX_X_HIGHER4;
+ retval = cp_tm1217_read(ts, req, 1);
+ ts->dinfo.maxX = (req[1] & 0xF) << 8;
+
+ req[0] = TMA1217_MAX_X_LOWER8;
+ retval = cp_tm1217_read(ts, req, 1);
+ ts->dinfo.maxX = ts->dinfo.maxX | req[1];
+
+ req[0] = TMA1217_MAX_Y_HIGHER4;
+ retval = cp_tm1217_read(ts, req, 1);
+ ts->dinfo.maxY = (req[1] & 0xF) << 8;
+
+ req[0] = TMA1217_MAX_Y_LOWER8;
+ retval = cp_tm1217_read(ts, req, 1);
+ ts->dinfo.maxY = ts->dinfo.maxY | req[1];
+
+ return 0;
+
+}
+
+/*
+ * Set up a GPIO for use as the interrupt. We can't simply do this at
+ * boot time because the GPIO drivers themselves may not be around at
+ * boot/firmware set up time to do the work. Instead defer it to driver
+ * detection.
+ */
+
+static int cp_tm1217_setup_gpio_irq(struct cp_tm1217_device *ts)
+{
+ int retval;
+
+ /* Hook up the irq handler */
+ retval = gpio_request(ts->gpio, "cp_tm1217_touch");
+ if (retval < 0) {
+ dev_err(ts->dev, "cp_tm1217: GPIO request failed error %d\n",
+ retval);
+ return retval;
+ }
+
+ retval = gpio_direction_input(ts->gpio);
+ if (retval < 0) {
+ dev_err(ts->dev,
+ "cp_tm1217: GPIO direction configuration failed, error %d\n",
+ retval);
+ gpio_free(ts->gpio);
+ return retval;
+ }
+
+ retval = gpio_to_irq(ts->gpio);
+ if (retval < 0) {
+ dev_err(ts->dev, "cp_tm1217: GPIO to IRQ failedi,"
+ " error %d\n", retval);
+ gpio_free(ts->gpio);
+ }
+ dev_dbg(ts->dev,
+ "cp_tm1217: Got IRQ number is %d for GPIO %d\n",
+ retval, ts->gpio);
+ return retval;
+}
+
+static int cp_tm1217_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct cp_tm1217_device *ts;
+ struct input_dev *input_dev;
+ struct input_dev_info *input_info;
+ struct cp_tm1217_platform_data *pdata;
+ u8 req[2];
+ int i, retval;
+
+ /* No pdata is fine - we then use "normal" IRQ mode */
+
+ pdata = client->dev.platform_data;
+
+ ts = kzalloc(sizeof(struct cp_tm1217_device), GFP_KERNEL);
+ if (!ts) {
+ dev_err(ts->dev,
+ "cp_tm1217: Private Device Struct alloc failed\n");
+ return -ENOMEM;
+ }
+
+ ts->client = client;
+ ts->dev = &client->dev;
+ i2c_set_clientdata(client, ts);
+
+ ts->thread_running = 0;
+ mutex_init(&ts->thread_mutex);
+
+ /* Reset the Controller */
+ req[0] = TMA1217_DEVICE_CMD_RESET;
+ req[1] = 0x1;
+ retval = cp_tm1217_write(ts, req, 1);
+ if (retval != 1) {
+ dev_err(ts->dev, "cp_tm1217: Controller reset failed\n");
+ kfree(ts);
+ return -EIO;
+ }
+
+ /* Clear up the interrupt status from reset. */
+ req[0] = TMA1217_INT_STATUS;
+ retval = cp_tm1217_read(ts, req, 1);
+
+ /* Mask all the interrupts */
+ retval = cp_tm1217_mask_interrupt(ts);
+
+ /* Read the controller information */
+ cp_tm1217_init_data(ts);
+
+ /* The following code will register multiple event devices when
+ multi-pointer is enabled, the code has not been tested
+ with MPX */
+ for (i = 0; i < TOUCH_SUPPORTED; i++) {
+ input_dev = input_allocate_device();
+ if (input_dev == NULL) {
+ kfree(ts);
+ dev_err(ts->dev,
+ "cp_tm1217:Input Device Struct alloc failed\n");
+ return -ENOMEM;
+ }
+ input_info = &ts->cp_input_info[i];
+ snprintf(input_info->name, sizeof(input_info->name),
+ "cp_tm1217_touchscreen_%d", i);
+ input_dev->name = input_info->name;
+ snprintf(input_info->phys, sizeof(input_info->phys),
+ "%s/input%d", dev_name(&client->dev), i);
+
+ input_dev->phys = input_info->phys;
+ input_dev->id.bustype = BUS_I2C;
+
+ input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
+ input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
+
+ input_set_abs_params(input_dev, ABS_X, 0, ts->dinfo.maxX, 0, 0);
+ input_set_abs_params(input_dev, ABS_Y, 0, ts->dinfo.maxY, 0, 0);
+
+ retval = input_register_device(input_dev);
+ if (retval) {
+ dev_err(ts->dev,
+ "Input dev registration failed for %s\n",
+ input_dev->name);
+ goto fail;
+ }
+ input_info->input = input_dev;
+ }
+
+ /* Setup the reporting mode to send an interrupt only when
+ finger arrives or departs. */
+ req[0] = TMA1217_REPORT_MODE;
+ req[1] = 0x02;
+ retval = cp_tm1217_write(ts, req, 1);
+
+ /* Setup the device to no sleep mode for now and make it configured */
+ req[0] = TMA1217_DEVICE_CTRL;
+ req[1] = 0x84;
+ retval = cp_tm1217_write(ts, req, 1);
+
+ /* Check for the status of the device */
+ req[0] = TMA1217_DEV_STATUS;
+ retval = cp_tm1217_read(ts, req, 1);
+ if (req[1] != 0) {
+ dev_err(ts->dev,
+ "cp_tm1217: Device Status 0x%x != 0: config failed\n",
+ req[1]);
+
+ retval = -EIO;
+ goto fail;
+ }
+
+ if (pdata && pdata->gpio) {
+ ts->gpio = pdata->gpio;
+ retval = cp_tm1217_setup_gpio_irq(ts);
+ } else
+ retval = client->irq;
+
+ if (retval < 0) {
+ dev_err(ts->dev, "cp_tm1217: GPIO request failed error %d\n",
+ retval);
+ goto fail;
+ }
+
+ client->irq = retval;
+
+
+ retval = request_threaded_irq(client->irq,
+ NULL, cp_tm1217_sample_thread,
+ IRQF_TRIGGER_FALLING, "cp_tm1217_touch", ts);
+ if (retval < 0) {
+ dev_err(ts->dev, "cp_tm1217: Request IRQ error %d\n", retval);
+ goto fail_gpio;
+ }
+
+ /* Unmask the interrupts */
+ retval = cp_tm1217_unmask_interrupt(ts);
+ if (retval == 0)
+ return 0;
+
+ free_irq(client->irq, ts);
+fail_gpio:
+ if (ts->gpio)
+ gpio_free(ts->gpio);
+fail:
+ /* Clean up before returning failure */
+ for (i = 0; i < TOUCH_SUPPORTED; i++) {
+ if (ts->cp_input_info[i].input) {
+ input_unregister_device(ts->cp_input_info[i].input);
+ input_free_device(ts->cp_input_info[i].input);
+ }
+ }
+ kfree(ts);
+ return retval;
+
+}
+
+/*
+ * cp_tm1217 suspend
+ *
+ */
+static int cp_tm1217_suspend(struct i2c_client *client, pm_message_t mesg)
+{
+ struct cp_tm1217_device *ts = i2c_get_clientdata(client);
+ u8 req[2];
+ int retval;
+
+ /* Put the controller to sleep */
+ req[0] = TMA1217_DEVICE_CTRL;
+ retval = cp_tm1217_read(ts, req, 1);
+ req[1] = (req[1] & 0xF8) | 0x1;
+ retval = cp_tm1217_write(ts, req, 1);
+
+ if (device_may_wakeup(&client->dev))
+ enable_irq_wake(client->irq);
+
+ return 0;
+}
+
+/*
+ * cp_tm1217_resume
+ *
+ */
+static int cp_tm1217_resume(struct i2c_client *client)
+{
+ struct cp_tm1217_device *ts = i2c_get_clientdata(client);
+ u8 req[2];
+ int retval;
+
+ /* Take the controller out of sleep */
+ req[0] = TMA1217_DEVICE_CTRL;
+ retval = cp_tm1217_read(ts, req, 1);
+ req[1] = (req[1] & 0xF8) | 0x4;
+ retval = cp_tm1217_write(ts, req, 1);
+
+ /* Restore the register settings sinc the power to the
+ could have been cut off */
+
+ /* Setup the reporting mode to send an interrupt only when
+ finger arrives or departs. */
+ req[0] = TMA1217_REPORT_MODE;
+ req[1] = 0x02;
+ retval = cp_tm1217_write(ts, req, 1);
+
+ /* Setup the device to no sleep mode for now and make it configured */
+ req[0] = TMA1217_DEVICE_CTRL;
+ req[1] = 0x84;
+ retval = cp_tm1217_write(ts, req, 1);
+
+ /* Setup the interrupt mask */
+ retval = cp_tm1217_unmask_interrupt(ts);
+
+ if (device_may_wakeup(&client->dev))
+ disable_irq_wake(client->irq);
+
+ return 0;
+}
+
+/*
+ * cp_tm1217_remove
+ *
+ */
+static int cp_tm1217_remove(struct i2c_client *client)
+{
+ struct cp_tm1217_device *ts = i2c_get_clientdata(client);
+ int i;
+
+ free_irq(client->irq, ts);
+ if (ts->gpio)
+ gpio_free(ts->gpio);
+ for (i = 0; i < TOUCH_SUPPORTED; i++)
+ input_unregister_device(ts->cp_input_info[i].input);
+ kfree(ts);
+ return 0;
+}
+
+static struct i2c_device_id cp_tm1217_idtable[] = {
+ { CPTM1217_DEVICE_NAME, 0 },
+ { }
+};
+
+MODULE_DEVICE_TABLE(i2c, cp_tm1217_idtable);
+
+static struct i2c_driver cp_tm1217_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = CPTM1217_DRIVER_NAME,
+ },
+ .id_table = cp_tm1217_idtable,
+ .probe = cp_tm1217_probe,
+ .remove = cp_tm1217_remove,
+ .suspend = cp_tm1217_suspend,
+ .resume = cp_tm1217_resume,
+};
+
+static int __init clearpad_tm1217_init(void)
+{
+ return i2c_add_driver(&cp_tm1217_driver);
+}
+
+static void __exit clearpad_tm1217_exit(void)
+{
+ i2c_del_driver(&cp_tm1217_driver);
+}
+
+module_init(clearpad_tm1217_init);
+module_exit(clearpad_tm1217_exit);
+
+MODULE_AUTHOR("Ramesh Agarwal <ramesh.agarwal@xxxxxxxxx>");
+MODULE_DESCRIPTION("Synaptics TM1217 TouchScreen Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/spi/cp_tm1217.h b/include/linux/spi/cp_tm1217.h
new file mode 100644
index 0000000..5ab13a8
--- /dev/null
+++ b/include/linux/spi/cp_tm1217.h
@@ -0,0 +1,9 @@
+#ifndef __LINUX_SPI_CP_TM1217_H
+#define __LINUX_SPI_CP_TM1217_H
+
+struct cp_tm1217_platform_data
+{
+ int gpio; /* If not set uses the IRQ resource 0 */
+};
+
+#endif
--
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