--- /dev/null
+/*
+ * TSC2005 touchscreen driver
+ *
+ * Copyright (C) 2006-2010 Nokia Corporation
+ *
+ * Author: Lauri Leukkunen <lauri.leukkunen@nokia.com>
+ * based on TSC2301 driver by Klaus K. Pedersen <klaus.k.pedersen@nokia.com>
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/tsc2005.h>
+
+/*
+ * The touchscreen interface operates as follows:
+ *
+ * 1) Pen is pressed against the touchscreen.
+ * 2) TSC2005 performs AD conversion.
+ * 3) After the conversion is done TSC2005 drives DAV line down.
+ * 4) GPIO IRQ is received and tsc2005_irq_thread() is scheduled.
+ * 5) tsc2005_irq_thread() queues up an spi transfer to fetch the x, y, z1, z2
+ * values.
+ * 6) tsc2005_irq_thread() reports coordinates to input layer and sets up
+ * tsc2005_penup_timer() to be called after TSC2005_PENUP_TIME_MS (40ms).
+ * 7) When the penup timer expires, there have not been touch or DAV interrupts
+ * during the last 40ms which means the pen has been lifted.
+ *
+ * ESD recovery via a hardware reset is done if the TSC2005 doesn't respond
+ * after a configurable period (in ms) of activity. If esd_timeout is 0, the
+ * watchdog is disabled.
+ */
+
+/* control byte 1 */
+#define TSC2005_CMD 0x80
+#define TSC2005_CMD_NORMAL 0x00
+#define TSC2005_CMD_STOP 0x01
+#define TSC2005_CMD_12BIT 0x04
+
+/* control byte 0 */
+#define TSC2005_REG_READ 0x0001
+#define TSC2005_REG_PND0 0x0002
+#define TSC2005_REG_X 0x0000
+#define TSC2005_REG_Y 0x0008
+#define TSC2005_REG_Z1 0x0010
+#define TSC2005_REG_Z2 0x0018
+#define TSC2005_REG_TEMP_HIGH 0x0050
+#define TSC2005_REG_CFR0 0x0060
+#define TSC2005_REG_CFR1 0x0068
+#define TSC2005_REG_CFR2 0x0070
+
+/* configuration register 0 */
+#define TSC2005_CFR0_PRECHARGE_276US 0x0040
+#define TSC2005_CFR0_STABTIME_1MS 0x0300
+#define TSC2005_CFR0_CLOCK_1MHZ 0x1000
+#define TSC2005_CFR0_RESOLUTION12 0x2000
+#define TSC2005_CFR0_PENMODE 0x8000
+#define TSC2005_CFR0_INITVALUE (TSC2005_CFR0_STABTIME_1MS | \
+ TSC2005_CFR0_CLOCK_1MHZ | \
+ TSC2005_CFR0_RESOLUTION12 | \
+ TSC2005_CFR0_PRECHARGE_276US | \
+ TSC2005_CFR0_PENMODE)
+
+/* bits common to both read and write of configuration register 0 */
+#define TSC2005_CFR0_RW_MASK 0x3fff
+
+/* configuration register 1 */
+#define TSC2005_CFR1_BATCHDELAY_4MS 0x0003
+#define TSC2005_CFR1_INITVALUE TSC2005_CFR1_BATCHDELAY_4MS
+
+/* configuration register 2 */
+#define TSC2005_CFR2_MAVE_Z 0x0004
+#define TSC2005_CFR2_MAVE_Y 0x0008
+#define TSC2005_CFR2_MAVE_X 0x0010
+#define TSC2005_CFR2_AVG_7 0x0800
+#define TSC2005_CFR2_MEDIUM_15 0x3000
+#define TSC2005_CFR2_INITVALUE (TSC2005_CFR2_MAVE_X | \
+ TSC2005_CFR2_MAVE_Y | \
+ TSC2005_CFR2_MAVE_Z | \
+ TSC2005_CFR2_MEDIUM_15 | \
+ TSC2005_CFR2_AVG_7)
+
+#define MAX_12BIT 0xfff
+#define TSC2005_SPI_MAX_SPEED_HZ 10000000
+#define TSC2005_PENUP_TIME_MS 40
+
+struct tsc2005_spi_rd {
+ struct spi_transfer spi_xfer;
+ u32 spi_tx;
+ u32 spi_rx;
+};
+
+struct tsc2005 {
+ struct spi_device *spi;
+
+ struct spi_message spi_read_msg;
+ struct tsc2005_spi_rd spi_x;
+ struct tsc2005_spi_rd spi_y;
+ struct tsc2005_spi_rd spi_z1;
+ struct tsc2005_spi_rd spi_z2;
+
+ struct input_dev *idev;
+ char phys[32];
+
+ struct mutex mutex;
+
+ /* raw copy of previous x,y,z */
+ int in_x;
+ int in_y;
+ int in_z1;
+ int in_z2;
+
+ struct timer_list penup_timer;
+ struct work_struct penup_work;
+
+ unsigned int esd_timeout;
+ struct timer_list esd_timer;
+ struct work_struct esd_work;
+
+ unsigned int x_plate_ohm;
+
+ bool disabled;
+ unsigned int disable_depth;
+ unsigned int pen_down;
+
+ void (*set_reset)(bool enable);
+};
+
+static void tsc2005_cmd(struct tsc2005 *ts, u8 cmd)
+{
+ u8 tx;
+ struct spi_message msg;
+ struct spi_transfer xfer = { 0 };
+
+ tx = TSC2005_CMD | TSC2005_CMD_12BIT | cmd;
+
+ xfer.tx_buf = &tx;
+ xfer.rx_buf = NULL;
+ xfer.len = 1;
+ xfer.bits_per_word = 8;
+
+ spi_message_init(&msg);
+ spi_message_add_tail(&xfer, &msg);
+ spi_sync(ts->spi, &msg);
+}
+
+static void tsc2005_write(struct tsc2005 *ts, u8 reg, u16 value)
+{
+ u32 tx;
+ struct spi_message msg;
+ struct spi_transfer xfer = { 0 };
+
+ tx = (reg | TSC2005_REG_PND0) << 16;
+ tx |= value;
+
+ xfer.tx_buf = &tx;
+ xfer.rx_buf = NULL;
+ xfer.len = 4;
+ xfer.bits_per_word = 24;
+
+ spi_message_init(&msg);
+ spi_message_add_tail(&xfer, &msg);
+ spi_sync(ts->spi, &msg);
+}
+
+static void tsc2005_setup_read(struct tsc2005_spi_rd *rd, u8 reg, bool last)
+{
+ rd->spi_tx = (reg | TSC2005_REG_READ) << 16;
+ rd->spi_xfer.tx_buf = &rd->spi_tx;
+ rd->spi_xfer.rx_buf = &rd->spi_rx;
+ rd->spi_xfer.len = 4;
+ rd->spi_xfer.bits_per_word = 24;
+ rd->spi_xfer.cs_change = !last;
+}
+
+static void tsc2005_read(struct tsc2005 *ts, u8 reg, u16 *value)
+{
+ struct spi_message msg;
+ struct tsc2005_spi_rd spi_rd = { { 0 }, 0, 0 };
+
+ tsc2005_setup_read(&spi_rd, reg, 1);
+
+ spi_message_init(&msg);
+ spi_message_add_tail(&spi_rd.spi_xfer, &msg);
+ spi_sync(ts->spi, &msg);
+ *value = spi_rd.spi_rx;
+}
+
+static void tsc2005_update_pen_state(struct tsc2005 *ts,
+ int x, int y, int pressure)
+{
+ if (pressure) {
+ input_report_abs(ts->idev, ABS_X, x);
+ input_report_abs(ts->idev, ABS_Y, y);
+ input_report_abs(ts->idev, ABS_PRESSURE, pressure);
+ if (!ts->pen_down) {
+ input_report_key(ts->idev, BTN_TOUCH, !!pressure);
+ ts->pen_down = 1;
+ }
+ } else {
+ input_report_abs(ts->idev, ABS_PRESSURE, 0);
+ if (ts->pen_down) {
+ input_report_key(ts->idev, BTN_TOUCH, 0);
+ ts->pen_down = 0;
+ }
+ }
+ input_sync(ts->idev);
+ dev_dbg(&ts->spi->dev, "point(%4d,%4d), pressure (%4d)\n", x, y,
+ pressure);
+}
+
+static irqreturn_t tsc2005_irq_handler(int irq, void *dev_id)
+{
+ struct tsc2005 *ts = dev_id;
+
+ /* update the penup timer only if it's pending */
+ mod_timer_pending(&ts->penup_timer,
+ jiffies + msecs_to_jiffies(TSC2005_PENUP_TIME_MS));
+
+ return IRQ_WAKE_THREAD;
+}
+
+static irqreturn_t tsc2005_irq_thread(int irq, void *_ts)
+{
+ struct tsc2005 *ts = _ts;
+ unsigned int pressure;
+ u32 x;
+ u32 y;
+ u32 z1;
+ u32 z2;
+
+ mutex_lock(&ts->mutex);
+
+ if (unlikely(ts->disable_depth))
+ goto out;
+
+ /* read the coordinates */
+ spi_sync(ts->spi, &ts->spi_read_msg);
+ x = ts->spi_x.spi_rx;
+ y = ts->spi_y.spi_rx;
+ z1 = ts->spi_z1.spi_rx;
+ z2 = ts->spi_z2.spi_rx;
+
+ /* validate position */
+ if (unlikely(x > MAX_12BIT || y > MAX_12BIT))
+ goto out;
+
+ /* skip coords if the pressure components are out of range */
+ if (unlikely(z1 == 0 || z2 > MAX_12BIT || z1 >= z2))
+ goto out;
+
+ /* skip point if this is a pen down with the exact same values as
+ * the value before pen-up - that implies SPI fed us stale data
+ */
+ if (!ts->pen_down &&
+ ts->in_x == x &&
+ ts->in_y == y &&
+ ts->in_z1 == z1 &&
+ ts->in_z2 == z2)
+ goto out;
+
+ /* At this point we are happy we have a valid and useful reading.
+ * Remember it for later comparisons. We may now begin downsampling
+ */
+ ts->in_x = x;
+ ts->in_y = y;
+ ts->in_z1 = z1;
+ ts->in_z2 = z2;
+
+ /* compute touch pressure resistance using equation #1 */
+ pressure = x * (z2 - z1) / z1;
+ pressure = pressure * ts->x_plate_ohm / 4096;
+ if (unlikely(pressure > MAX_12BIT))
+ goto out;
+
+ tsc2005_update_pen_state(ts, x, y, pressure);
+
+ /* set the penup timer */
+ mod_timer(&ts->penup_timer,
+ jiffies + msecs_to_jiffies(TSC2005_PENUP_TIME_MS));
+
+ if (!ts->esd_timeout)
+ goto out;
+
+ /* update the watchdog timer */
+ mod_timer(&ts->esd_timer,
+ round_jiffies(jiffies + msecs_to_jiffies(ts->esd_timeout)));
+
+out:
+ mutex_unlock(&ts->mutex);
+ return IRQ_HANDLED;
+}
+
+static void tsc2005_penup_timer(unsigned long data)
+{
+ struct tsc2005 *ts = (struct tsc2005 *)data;
+
+ schedule_work(&ts->penup_work);
+}
+
+static void tsc2005_penup_work(struct work_struct *work)
+{
+ struct tsc2005 *ts = container_of(work, struct tsc2005, penup_work);
+
+ mutex_lock(&ts->mutex);
+ tsc2005_update_pen_state(ts, 0, 0, 0);
+ mutex_unlock(&ts->mutex);
+}
+
+static void tsc2005_start_scan(struct tsc2005 *ts)
+{
+ tsc2005_write(ts, TSC2005_REG_CFR0, TSC2005_CFR0_INITVALUE);
+ tsc2005_write(ts, TSC2005_REG_CFR1, TSC2005_CFR1_INITVALUE);
+ tsc2005_write(ts, TSC2005_REG_CFR2, TSC2005_CFR2_INITVALUE);
+ tsc2005_cmd(ts, TSC2005_CMD_NORMAL);
+}
+
+static void tsc2005_stop_scan(struct tsc2005 *ts)
+{
+ tsc2005_cmd(ts, TSC2005_CMD_STOP);
+}
+
+/* must be called with mutex held */
+static void tsc2005_disable(struct tsc2005 *ts)
+{
+ if (ts->disable_depth++ != 0)
+ return;
+ disable_irq(ts->spi->irq);
+ if (ts->esd_timeout)
+ del_timer_sync(&ts->esd_timer);
+ del_timer_sync(&ts->penup_timer);
+ tsc2005_stop_scan(ts);
+}
+
+/* must be called with mutex held */
+static void tsc2005_enable(struct tsc2005 *ts)
+{
+ if (--ts->disable_depth != 0)
+ return;
+ tsc2005_start_scan(ts);
+ enable_irq(ts->spi->irq);
+ if (!ts->esd_timeout)
+ return;
+ mod_timer(&ts->esd_timer,
+ round_jiffies(jiffies + msecs_to_jiffies(ts->esd_timeout)));
+}
+
+static ssize_t tsc2005_disable_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct tsc2005 *ts = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%u\n", ts->disabled);
+}
+
+static ssize_t tsc2005_disable_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct tsc2005 *ts = dev_get_drvdata(dev);
+ unsigned long res;
+ int i;
+
+ if (strict_strtoul(buf, 10, &res) < 0)
+ return -EINVAL;
+ i = res ? 1 : 0;
+
+ mutex_lock(&ts->mutex);
+ if (i == ts->disabled)
+ goto out;
+ ts->disabled = i;
+ if (i)
+ tsc2005_disable(ts);
+ else
+ tsc2005_enable(ts);
+out:
+ mutex_unlock(&ts->mutex);
+ return count;
+}
+static DEVICE_ATTR(disable, 0664, tsc2005_disable_show, tsc2005_disable_store);
+
+static ssize_t tsc2005_selftest_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct tsc2005 *ts = dev_get_drvdata(dev);
+ u16 temp_high;
+ u16 temp_high_orig;
+ u16 temp_high_test;
+ unsigned int result;
+
+ if (!ts->set_reset) {
+ dev_warn(&ts->spi->dev,
+ "unable to selftest: no reset function\n");
+ result = 0;
+ goto out;
+ }
+
+ mutex_lock(&ts->mutex);
+
+ /*
+ * Test TSC2005 communications via temp high register.
+ */
+ tsc2005_disable(ts);
+ result = 1;
+ tsc2005_read(ts, TSC2005_REG_TEMP_HIGH, &temp_high_orig);
+ temp_high_test = (temp_high_orig - 1) & MAX_12BIT;
+ tsc2005_write(ts, TSC2005_REG_TEMP_HIGH, temp_high_test);
+ tsc2005_read(ts, TSC2005_REG_TEMP_HIGH, &temp_high);
+ if (temp_high != temp_high_test) {
+ dev_warn(dev, "selftest failed: %d != %d\n",
+ temp_high, temp_high_test);
+ result = 0;
+ }
+
+ /* hardware reset */
+ ts->set_reset(0);
+ usleep_range(100, 500); /* only 10us required */
+ ts->set_reset(1);
+ tsc2005_enable(ts);
+
+ /* test that the reset really happened */
+ tsc2005_read(ts, TSC2005_REG_TEMP_HIGH, &temp_high);
+ if (temp_high != temp_high_orig) {
+ dev_warn(dev, "selftest failed after reset: %d != %d\n",
+ temp_high, temp_high_orig);
+ result = 0;
+ }
+
+ mutex_unlock(&ts->mutex);
+
+out:
+ return sprintf(buf, "%u\n", result);
+}
+static DEVICE_ATTR(selftest, S_IRUGO, tsc2005_selftest_show, NULL);
+
+static void tsc2005_esd_timer(unsigned long data)
+{
+ struct tsc2005 *ts = (struct tsc2005 *)data;
+
+ schedule_work(&ts->esd_work);
+}
+
+static void tsc2005_esd_work(struct work_struct *work)
+{
+ struct tsc2005 *ts = container_of(work, struct tsc2005, esd_work);
+ u16 r;
+
+ mutex_lock(&ts->mutex);
+
+ if (ts->disable_depth)
+ goto out;
+
+ /*
+ * If we cannot read our known value from configuration register 0 then
+ * reset the controller as if from power-up and start scanning again.
+ */
+ tsc2005_read(ts, TSC2005_REG_CFR0, &r);
+ if ((r ^ TSC2005_CFR0_INITVALUE) & TSC2005_CFR0_RW_MASK) {
+ dev_info(&ts->spi->dev, "TSC2005 not responding - resetting\n");
+ ts->set_reset(0);
+ tsc2005_update_pen_state(ts, 0, 0, 0);
+ usleep_range(100, 500); /* only 10us required */
+ ts->set_reset(1);
+ tsc2005_start_scan(ts);
+ }
+
+ /* re-arm the watchdog */
+ mod_timer(&ts->esd_timer,
+ round_jiffies(jiffies + msecs_to_jiffies(ts->esd_timeout)));
+
+out:
+ mutex_unlock(&ts->mutex);
+}
+
+static void __devinit tsc2005_setup_spi_xfer(struct tsc2005 *ts)
+{
+ tsc2005_setup_read(&ts->spi_x, TSC2005_REG_X, 0);
+ tsc2005_setup_read(&ts->spi_y, TSC2005_REG_Y, 0);
+ tsc2005_setup_read(&ts->spi_z1, TSC2005_REG_Z1, 0);
+ tsc2005_setup_read(&ts->spi_z2, TSC2005_REG_Z2, 1);
+
+ spi_message_init(&ts->spi_read_msg);
+ spi_message_add_tail(&ts->spi_x.spi_xfer, &ts->spi_read_msg);
+ spi_message_add_tail(&ts->spi_y.spi_xfer, &ts->spi_read_msg);
+ spi_message_add_tail(&ts->spi_z1.spi_xfer, &ts->spi_read_msg);
+ spi_message_add_tail(&ts->spi_z2.spi_xfer, &ts->spi_read_msg);
+}
+
+static struct attribute *tsc2005_attrs[] = {
+ &dev_attr_disable.attr,
+ &dev_attr_selftest.attr,
+ NULL
+};
+
+static struct attribute_group tsc2005_attr_group = {
+ .attrs = tsc2005_attrs,
+};
+
+static int __devinit tsc2005_setup(struct tsc2005 *ts,
+ struct tsc2005_platform_data *pdata)
+{
+ int r;
+ int fudge_x;
+ int fudge_y;
+ int fudge_p;
+ int p_max;
+ int x_max;
+ int y_max;
+
+ mutex_init(&ts->mutex);
+
+ tsc2005_setup_spi_xfer(ts);
+
+ init_timer(&ts->penup_timer);
+ setup_timer(&ts->penup_timer, tsc2005_penup_timer, (unsigned long)ts);
+ INIT_WORK(&ts->penup_work, tsc2005_penup_work);
+
+ fudge_x = pdata->ts_x_fudge ? : 4;
+ fudge_y = pdata->ts_y_fudge ? : 8;
+ fudge_p = pdata->ts_pressure_fudge ? : 2;
+ x_max = pdata->ts_x_max ? : MAX_12BIT;
+ y_max = pdata->ts_y_max ? : MAX_12BIT;
+ p_max = pdata->ts_pressure_max ? : MAX_12BIT;
+ ts->x_plate_ohm = pdata->ts_x_plate_ohm ? : 280;
+ ts->esd_timeout = pdata->esd_timeout_ms;
+ ts->set_reset = pdata->set_reset;
+
+ ts->idev = input_allocate_device();
+ if (ts->idev == NULL)
+ return -ENOMEM;
+ ts->idev->name = "TSC2005 touchscreen";
+ snprintf(ts->phys, sizeof(ts->phys), "%s/input-ts",
+ dev_name(&ts->spi->dev));
+ ts->idev->phys = ts->phys;
+ ts->idev->evbit[0] = BIT(EV_ABS) | BIT(EV_KEY);
+ ts->idev->absbit[0] = BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE);
+ ts->idev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
+
+ input_set_abs_params(ts->idev, ABS_X, 0, x_max, fudge_x, 0);
+ input_set_abs_params(ts->idev, ABS_Y, 0, y_max, fudge_y, 0);
+ input_set_abs_params(ts->idev, ABS_PRESSURE, 0, p_max, fudge_p, 0);
+
+ r = request_threaded_irq(ts->spi->irq, tsc2005_irq_handler,
+ tsc2005_irq_thread, IRQF_TRIGGER_RISING,
+ "tsc2005", ts);
+ if (r) {
+ dev_err(&ts->spi->dev, "request_threaded_irq(): %d\n", r);
+ goto err1;
+ }
+ set_irq_wake(ts->spi->irq, 1);
+
+ r = input_register_device(ts->idev);
+ if (r) {
+ dev_err(&ts->spi->dev, "input_register_device(): %d\n", r);
+ goto err2;
+ }
+
+ r = sysfs_create_group(&ts->spi->dev.kobj, &tsc2005_attr_group);
+ if (r)
+ dev_warn(&ts->spi->dev, "sysfs entry creation failed: %d\n", r);
+
+ tsc2005_start_scan(ts);
+
+ if (!ts->esd_timeout || !ts->set_reset)
+ goto done;
+
+ /* start the optional ESD watchdog */
+ setup_timer(&ts->esd_timer, tsc2005_esd_timer, (unsigned long)ts);
+ INIT_WORK(&ts->esd_work, tsc2005_esd_work);
+ mod_timer(&ts->esd_timer,
+ round_jiffies(jiffies + msecs_to_jiffies(ts->esd_timeout)));
+
+done:
+ return 0;
+
+err2:
+ free_irq(ts->spi->irq, ts);
+
+err1:
+ input_free_device(ts->idev);
+ return r;
+}
+
+static int __devinit tsc2005_probe(struct spi_device *spi)
+{
+ struct tsc2005_platform_data *pdata = spi->dev.platform_data;
+ struct tsc2005 *ts;
+ int r;
+
+ if (spi->irq < 0) {
+ dev_dbg(&spi->dev, "no irq\n");
+ return -ENODEV;
+ }
+
+ if (!pdata) {
+ dev_dbg(&spi->dev, "no platform data\n");
+ return -ENODEV;
+ }
+
+ ts = kzalloc(sizeof(*ts), GFP_KERNEL);
+ if (ts == NULL)
+ return -ENOMEM;
+
+ dev_set_drvdata(&spi->dev, ts);
+ ts->spi = spi;
+ spi->dev.power.power_state = PMSG_ON;
+ spi->mode = SPI_MODE_0;
+ spi->bits_per_word = 8;
+ if (!spi->max_speed_hz)
+ spi->max_speed_hz = TSC2005_SPI_MAX_SPEED_HZ;
+ spi_setup(spi);
+
+ r = tsc2005_setup(ts, pdata);
+ if (r)
+ kfree(ts);
+ return r;
+}
+
+static int __devexit tsc2005_remove(struct spi_device *spi)
+{
+ struct tsc2005 *ts = dev_get_drvdata(&spi->dev);
+
+ mutex_lock(&ts->mutex);
+ tsc2005_disable(ts);
+ mutex_unlock(&ts->mutex);
+
+ if (ts->esd_timeout)
+ del_timer_sync(&ts->esd_timer);
+ del_timer_sync(&ts->penup_timer);
+
+ flush_work(&ts->esd_work);
+ flush_work(&ts->penup_work);
+
+ sysfs_remove_group(&ts->spi->dev.kobj, &tsc2005_attr_group);
+ free_irq(ts->spi->irq, ts);
+ input_unregister_device(ts->idev);
+ kfree(ts);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int tsc2005_suspend(struct spi_device *spi, pm_message_t mesg)
+{
+ struct tsc2005 *ts = dev_get_drvdata(&spi->dev);
+
+ mutex_lock(&ts->mutex);
+ tsc2005_disable(ts);
+ mutex_unlock(&ts->mutex);
+
+ return 0;
+}
+
+static int tsc2005_resume(struct spi_device *spi)
+{
+ struct tsc2005 *ts = dev_get_drvdata(&spi->dev);
+
+ mutex_lock(&ts->mutex);
+ tsc2005_enable(ts);
+ mutex_unlock(&ts->mutex);
+
+ return 0;
+}
+#endif
+
+static struct spi_driver tsc2005_driver = {
+ .driver = {
+ .name = "tsc2005",
+ .owner = THIS_MODULE,
+ },
+#ifdef CONFIG_PM
+ .suspend = tsc2005_suspend,
+ .resume = tsc2005_resume,
+#endif
+ .probe = tsc2005_probe,
+ .remove = __devexit_p(tsc2005_remove),
+};
+
+static int __init tsc2005_init(void)
+{
+ printk(KERN_INFO "TSC2005 driver initializing\n");
+ return spi_register_driver(&tsc2005_driver);
+}
+module_init(tsc2005_init);
+
+static void __exit tsc2005_exit(void)
+{
+ spi_unregister_driver(&tsc2005_driver);
+}
+module_exit(tsc2005_exit);
+
+MODULE_AUTHOR("Lauri Leukkunen <lauri.leukkunen@nokia.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:tsc2005");
projects / openwrt / staging / blogic.git / commitdiff