--- /dev/null
+/*
+ * TSC2301 touchscreen driver
+ *
+ * Copyright (C) 2005-2006 Nokia Corporation
+ *
+ * Written by Jarkko Oikarinen, Imre Deak and Juha Yrjola
+ *
+ * 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>
+
+#ifdef CONFIG_ARCH_OMAP
+#include <asm/arch/gpio.h>
+#endif
+
+#include <linux/spi/tsc2301.h>
+
+/**
+ * The touchscreen interface operates as follows:
+ *
+ * Initialize:
+ * Request access to GPIO103 (DAV)
+ * tsc2301_dav_irq_handler will trigger when DAV line goes down
+ *
+ * 1) Pen is pressed against touchscreeen
+ * 2) TSC2301 performs AD conversion
+ * 3) After the conversion is done TSC2301 drives DAV line down
+ * 4) GPIO IRQ is received and tsc2301_dav_irq_handler is called
+ * 5) tsc2301_dav_irq_handler sets up tsc2301_ts_timer in TSC2301_TS_SCAN_TIME
+ * 6) tsc2301_ts_timer disables the irq and requests spi driver
+ * to read X, Y, Z1 and Z2
+ * 7) SPI framework calls tsc2301_ts_rx after the coordinates are read
+ * 8) tsc2301_ts_rx reports coordinates to input layer and
+ * sets up tsc2301_ts_timer to be called after TSC2301_TS_SCAN_TIME
+ * 9) if tsc2301_tx_timer notices that the pen has been lifted, the lift event
+ * is sent, and irq is again enabled.
+ */
+
+
+#define TSC2301_TOUCHSCREEN_PRODUCT_ID 0x0052
+#define TSC2301_TOUCHSCREEN_PRODUCT_VERSION 0x0001
+
+#define TSC2301_TS_SCAN_TIME 1
+
+#define TSC2301_ADCREG_CONVERSION_CTRL_BY_TSC2301 0x8000
+#define TSC2301_ADCREG_CONVERSION_CTRL_BY_HOST 0x0000
+
+#define TSC2301_ADCREG_FUNCTION_NONE 0x0000
+#define TSC2301_ADCREG_FUNCTION_XY 0x0400
+#define TSC2301_ADCREG_FUNCTION_XYZ 0x0800
+#define TSC2301_ADCREG_FUNCTION_X 0x0C00
+#define TSC2301_ADCREG_FUNCTION_Y 0x1000
+#define TSC2301_ADCREG_FUNCTION_Z 0x1400
+#define TSC2301_ADCREG_FUNCTION_DAT1 0x1800
+#define TSC2301_ADCREG_FUNCTION_DAT2 0x1C00
+#define TSC2301_ADCREG_FUNCTION_AUX1 0x2000
+#define TSC2301_ADCREG_FUNCTION_AUX2 0x2400
+#define TSC2301_ADCREG_FUNCTION_TEMP 0x2800
+
+#define TSC2301_ADCREG_RESOLUTION_8BIT 0x0100
+#define TSC2301_ADCREG_RESOLUTION_10BIT 0x0200
+#define TSC2301_ADCREG_RESOLUTION_12BIT 0x0300
+
+#define TSC2301_ADCREG_AVERAGING_NONE 0x0000
+#define TSC2301_ADCREG_AVERAGING_4AVG 0x0040
+#define TSC2301_ADCREG_AVERAGING_8AVG 0x0080
+#define TSC2301_ADCREG_AVERAGING_16AVG 0x00C0
+
+#define TSC2301_ADCREG_CLOCK_8MHZ 0x0000
+#define TSC2301_ADCREG_CLOCK_4MHZ 0x0010
+#define TSC2301_ADCREG_CLOCK_2MHZ 0x0020
+#define TSC2301_ADCREG_CLOCK_1MHZ 0x0030
+
+#define TSC2301_ADCREG_VOLTAGE_STAB_0US 0x0000
+#define TSC2301_ADCREG_VOLTAGE_STAB_100US 0x0002
+#define TSC2301_ADCREG_VOLTAGE_STAB_500US 0x0004
+#define TSC2301_ADCREG_VOLTAGE_STAB_1MS 0x0006
+#define TSC2301_ADCREG_VOLTAGE_STAB_5MS 0x0008
+#define TSC2301_ADCREG_VOLTAGE_STAB_10MS 0x000A
+#define TSC2301_ADCREG_VOLTAGE_STAB_50MS 0x000C
+#define TSC2301_ADCREG_VOLTAGE_STAB_100MS 0x000E
+
+#define TSC2301_ADCREG_STOP_CONVERSION 0x4000
+
+#define MAX_12BIT ((1 << 12) - 1)
+
+struct tsc2301_ts {
+ struct input_dev *idev;
+ char phys[32];
+ struct timer_list timer;
+ spinlock_t lock;
+
+ struct spi_transfer read_xfer[2];
+ struct spi_message read_msg;
+ u16 data[4];
+
+ int hw_avg_max;
+ u16 x;
+ u16 y;
+ u16 p;
+ int sample_cnt;
+
+ int ignore_last : 1;
+ u16 x_plate_ohm;
+ int stab_time;
+ int max_pressure;
+ int touch_pressure;
+ int pressure_limit;
+
+ u16 irq_enabled:1;
+ u16 pen_down:1;
+ u16 disabled:1;
+ u16 pending:1;
+
+ int hw_flags;
+
+ s16 dav_gpio;
+ int irq;
+};
+
+
+static const u16 tsc2301_ts_read_data = 0x8000 | TSC2301_REG_X;
+
+static int tsc2301_ts_check_config(struct tsc2301_ts *ts, int *hw_flags)
+{
+ int flags;
+
+ flags = 0;
+ switch (ts->hw_avg_max) {
+ case 0:
+ flags |= TSC2301_ADCREG_AVERAGING_NONE;
+ break;
+ case 4:
+ flags |= TSC2301_ADCREG_AVERAGING_4AVG;
+ break;
+ case 8:
+ flags |= TSC2301_ADCREG_AVERAGING_8AVG;
+ break;
+ case 16:
+ flags |= TSC2301_ADCREG_AVERAGING_16AVG;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (ts->stab_time) {
+ case 0:
+ flags |= TSC2301_ADCREG_VOLTAGE_STAB_0US;
+ break;
+ case 100:
+ flags |= TSC2301_ADCREG_VOLTAGE_STAB_100US;
+ break;
+ case 500:
+ flags |= TSC2301_ADCREG_VOLTAGE_STAB_500US;
+ break;
+ case 1000:
+ flags |= TSC2301_ADCREG_VOLTAGE_STAB_1MS;
+ break;
+ case 5000:
+ flags |= TSC2301_ADCREG_VOLTAGE_STAB_5MS;
+ break;
+ case 10000:
+ flags |= TSC2301_ADCREG_VOLTAGE_STAB_10MS;
+ break;
+ case 50000:
+ flags |= TSC2301_ADCREG_VOLTAGE_STAB_50MS;
+ break;
+ case 100000:
+ flags |= TSC2301_ADCREG_VOLTAGE_STAB_100MS;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ *hw_flags = flags;
+ return 0;
+}
+
+/*
+ * This odd three-time initialization is to work around a bug in TSC2301.
+ * See TSC2301 errata for details.
+ */
+static int tsc2301_ts_configure(struct tsc2301 *tsc, int flags)
+{
+ struct spi_transfer xfer[3];
+ struct spi_transfer *x;
+ struct spi_message m;
+ int reg = TSC2301_REG_ADC;
+ u16 val1, val2, val3;
+ u16 data[6];
+
+ val1 = TSC2301_ADCREG_CONVERSION_CTRL_BY_HOST |
+ TSC2301_ADCREG_STOP_CONVERSION |
+ TSC2301_ADCREG_FUNCTION_NONE |
+ TSC2301_ADCREG_RESOLUTION_12BIT |
+ TSC2301_ADCREG_AVERAGING_NONE |
+ TSC2301_ADCREG_CLOCK_2MHZ |
+ TSC2301_ADCREG_VOLTAGE_STAB_100MS;
+
+ val2 = TSC2301_ADCREG_CONVERSION_CTRL_BY_HOST |
+ TSC2301_ADCREG_FUNCTION_XYZ |
+ TSC2301_ADCREG_RESOLUTION_12BIT |
+ TSC2301_ADCREG_AVERAGING_16AVG |
+ TSC2301_ADCREG_CLOCK_1MHZ |
+ TSC2301_ADCREG_VOLTAGE_STAB_100MS;
+
+ /* Averaging and voltage stabilization settings in flags */
+ val3 = TSC2301_ADCREG_CONVERSION_CTRL_BY_TSC2301 |
+ TSC2301_ADCREG_FUNCTION_XYZ |
+ TSC2301_ADCREG_RESOLUTION_12BIT |
+ TSC2301_ADCREG_CLOCK_1MHZ |
+ flags;
+
+ /* Now we prepare the command for transferring */
+ data[0] = reg;
+ data[1] = val1;
+ data[2] = reg;
+ data[3] = val2;
+ data[4] = reg;
+ data[5] = val3;
+
+ spi_message_init(&m);
+ m.spi = tsc->spi;
+
+ memset(xfer, 0, sizeof(xfer));
+ x = &xfer[0];
+
+ x->tx_buf = &data[0];
+ x->len = 4;
+ x->cs_change = 1;
+ spi_message_add_tail(x, &m);
+
+ x++;
+ x->tx_buf = &data[2];
+ x->len = 4;
+ x->cs_change = 1;
+ spi_message_add_tail(x, &m);
+
+ x++;
+ x->tx_buf = &data[4];
+ x->len = 4;
+ spi_message_add_tail(x, &m);
+
+ spi_sync(m.spi, &m);
+
+ return 0;
+}
+
+static void tsc2301_ts_start_scan(struct tsc2301 *tsc)
+{
+ tsc2301_ts_configure(tsc, tsc->ts->hw_flags);
+}
+
+static void tsc2301_ts_stop_scan(struct tsc2301 *tsc)
+{
+ tsc2301_ts_configure(tsc, TSC2301_ADCREG_STOP_CONVERSION);
+}
+
+static int device_suspended(struct device *dev)
+{
+ struct tsc2301 *tsc = dev_get_drvdata(dev);
+ return dev->power.power_state.event != PM_EVENT_ON || tsc->ts->disabled;
+}
+
+static void update_pen_state(struct tsc2301_ts *ts, int x, int y, int pressure)
+{
+ int sync = 0;
+
+ 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, 1);
+ sync = 1;
+ } else if (ts->pen_down) {
+ input_report_abs(ts->idev, ABS_PRESSURE, 0);
+ input_report_key(ts->idev, BTN_TOUCH, 0);
+ sync = 1;
+ }
+
+ if (sync)
+ input_sync(ts->idev);
+
+ ts->pen_down = pressure ? 1 : 0;
+#ifdef VERBOSE
+ dev_dbg(&tsc->spi->dev, "x %4d y %4d p %4d\n", x, y, pressure);
+#endif
+}
+
+/*
+ * This procedure is called by the SPI framework after the coordinates
+ * have been read from TSC2301
+ */
+static void tsc2301_ts_rx(void *arg)
+{
+ struct tsc2301 *tsc = arg;
+ struct tsc2301_ts *ts = tsc->ts;
+ unsigned int x, y, z1, z2, pressure;
+
+ x = ts->data[0];
+ y = ts->data[1];
+ z1 = ts->data[2];
+ z2 = ts->data[3];
+
+ if (z1) {
+ pressure = ts->x_plate_ohm * x;
+ pressure /= 4096;
+ pressure *= z2 - z1;
+ pressure /= z1;
+ } else
+ pressure = 0;
+
+ /* If pressure value is above a preset limit (pen is barely
+ * touching the screen) we can't trust the coordinate values.
+ */
+ if (pressure < ts->pressure_limit && x < MAX_12BIT && y < MAX_12BIT) {
+ ts->pressure_limit = ts->max_pressure;
+ if (ts->ignore_last) {
+ if (ts->sample_cnt)
+ update_pen_state(ts, ts->x, ts->y, ts->p);
+ ts->x = x;
+ ts->y = y;
+ ts->p = pressure;
+ } else
+ update_pen_state(ts, x, y, pressure);
+ ts->sample_cnt++;
+ }
+
+ mod_timer(&ts->timer,
+ jiffies + msecs_to_jiffies(TSC2301_TS_SCAN_TIME));
+}
+
+static int is_pen_down(struct tsc2301_ts *ts)
+{
+ return ts->pen_down;
+}
+
+/*
+ * Timer is called every TSC2301_TS_SCAN_TIME when the pen is down
+ */
+static void tsc2301_ts_timer(unsigned long arg)
+{
+ struct tsc2301 *tsc = (void *) arg;
+ struct tsc2301_ts *ts = tsc->ts;
+ unsigned long flags;
+ int ndav;
+ int r;
+
+ spin_lock_irqsave(&ts->lock, flags);
+ ndav = omap_get_gpio_datain(ts->dav_gpio);
+ if (ndav || device_suspended(&tsc->spi->dev)) {
+ /* Pen has been lifted */
+ if (!device_suspended(&tsc->spi->dev)) {
+ ts->irq_enabled = 1;
+ enable_irq(ts->irq);
+ }
+ update_pen_state(ts, 0, 0, 0);
+ ts->pending = 0;
+ spin_unlock_irqrestore(&ts->lock, flags);
+
+ } else {
+ ts->pen_down = 1;
+ spin_unlock_irqrestore(&ts->lock, flags);
+
+ r = spi_async(tsc->spi, &ts->read_msg);
+ if (r)
+ dev_err(&tsc->spi->dev, "ts: spi_async() failed");
+ }
+}
+
+/*
+ * This interrupt is called when pen is down and first coordinates are
+ * available. That is indicated by a falling edge on DEV line. IRQ is
+ * disabled here because while the pen is down the coordinates are
+ * read by a timer.
+ */
+static irqreturn_t tsc2301_ts_irq_handler(int irq, void *dev_id)
+{
+ struct tsc2301 *tsc = dev_id;
+ struct tsc2301_ts *ts = tsc->ts;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ts->lock, flags);
+ if (ts->irq_enabled) {
+ ts->irq_enabled = 0;
+ disable_irq(ts->irq);
+ ts->pending = 1;
+ ts->pressure_limit = ts->touch_pressure;
+ ts->sample_cnt = 0;
+ mod_timer(&ts->timer,
+ jiffies + msecs_to_jiffies(TSC2301_TS_SCAN_TIME));
+ }
+ spin_unlock_irqrestore(&ts->lock, flags);
+
+ return IRQ_HANDLED;
+}
+
+/* Must be called with ts->lock held */
+static void tsc2301_ts_disable(struct tsc2301 *tsc)
+{
+ struct tsc2301_ts *ts = tsc->ts;
+
+ if (ts->disabled)
+ return;
+
+ ts->disabled = 1;
+ if (!ts->pending) {
+ ts->irq_enabled = 0;
+ disable_irq(ts->irq);
+ } else {
+ while (ts->pending) {
+ spin_unlock_irq(&ts->lock);
+ msleep(1);
+ spin_lock_irq(&ts->lock);
+ }
+ }
+
+ spin_unlock_irq(&ts->lock);
+ tsc2301_ts_stop_scan(tsc);
+ /* Workaround a bug where turning on / off touchscreen scanner
+ * can get the keypad scanner stuck.
+ */
+ tsc2301_kp_restart(tsc);
+ spin_lock_irq(&ts->lock);
+}
+
+static void tsc2301_ts_enable(struct tsc2301 *tsc)
+{
+ struct tsc2301_ts *ts = tsc->ts;
+
+ if (!ts->disabled)
+ return;
+
+ ts->disabled = 0;
+ ts->irq_enabled = 1;
+ enable_irq(ts->irq);
+
+ spin_unlock_irq(&ts->lock);
+ tsc2301_ts_start_scan(tsc);
+ /* Same workaround as above. */
+ tsc2301_kp_restart(tsc);
+ spin_lock_irq(&ts->lock);
+}
+
+#ifdef CONFIG_PM
+int tsc2301_ts_suspend(struct tsc2301 *tsc)
+{
+ struct tsc2301_ts *ts = tsc->ts;
+
+ spin_lock_irq(&ts->lock);
+ tsc2301_ts_disable(tsc);
+ spin_unlock_irq(&ts->lock);
+
+ return 0;
+}
+
+void tsc2301_ts_resume(struct tsc2301 *tsc)
+{
+ struct tsc2301_ts *ts = tsc->ts;
+
+ spin_lock_irq(&ts->lock);
+ tsc2301_ts_enable(tsc);
+ spin_unlock_irq(&ts->lock);
+}
+#endif
+
+static void tsc2301_ts_setup_spi_xfer(struct tsc2301 *tsc)
+{
+ struct tsc2301_ts *ts = tsc->ts;
+ struct spi_message *m = &ts->read_msg;
+ struct spi_transfer *x = &ts->read_xfer[0];
+
+ spi_message_init(m);
+
+ x->tx_buf = &tsc2301_ts_read_data;
+ x->len = 2;
+ spi_message_add_tail(x, m);
+
+ x++;
+ x->rx_buf = &ts->data;
+ x->len = 8;
+ spi_message_add_tail(x, m);
+
+ m->complete = tsc2301_ts_rx;
+ m->context = tsc;
+}
+
+static ssize_t tsc2301_ts_pen_down_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct tsc2301 *tsc = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%u\n", is_pen_down(tsc->ts));
+}
+
+static DEVICE_ATTR(pen_down, S_IRUGO, tsc2301_ts_pen_down_show, NULL);
+
+static ssize_t tsc2301_ts_disable_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct tsc2301 *tsc = dev_get_drvdata(dev);
+ struct tsc2301_ts *ts = tsc->ts;
+
+ return sprintf(buf, "%u\n", ts->disabled);
+}
+
+static ssize_t tsc2301_ts_disable_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct tsc2301 *tsc = dev_get_drvdata(dev);
+ struct tsc2301_ts *ts = tsc->ts;
+ char *endp;
+ int i;
+
+ i = simple_strtoul(buf, &endp, 10);
+ spin_lock_irq(&ts->lock);
+
+ if (i)
+ tsc2301_ts_disable(tsc);
+ else
+ tsc2301_ts_enable(tsc);
+
+ spin_unlock_irq(&ts->lock);
+
+ return count;
+}
+
+static DEVICE_ATTR(disable_ts, 0664, tsc2301_ts_disable_show,
+ tsc2301_ts_disable_store);
+
+int __devinit tsc2301_ts_init(struct tsc2301 *tsc,
+ struct tsc2301_platform_data *pdata)
+{
+ struct tsc2301_ts *ts;
+ struct input_dev *idev;
+ int dav_gpio, r;
+
+ if (pdata->dav_gpio < 0) {
+ dev_err(&tsc->spi->dev, "need DAV GPIO");
+ return -EINVAL;
+ }
+ dav_gpio = pdata->dav_gpio;
+
+ ts = kzalloc(sizeof(*ts), GFP_KERNEL);
+ if (ts == NULL)
+ return -ENOMEM;
+ tsc->ts = ts;
+
+ ts->dav_gpio = dav_gpio;
+#ifdef CONFIG_ARCH_OMAP
+ r = omap_request_gpio(dav_gpio);
+ if (r < 0) {
+ dev_err(&tsc->spi->dev, "unable to get DAV GPIO");
+ goto err1;
+ }
+ omap_set_gpio_direction(dav_gpio, 1);
+ ts->irq = OMAP_GPIO_IRQ(dav_gpio);
+#endif
+ init_timer(&ts->timer);
+ ts->timer.data = (unsigned long) tsc;
+ ts->timer.function = tsc2301_ts_timer;
+
+ spin_lock_init(&ts->lock);
+
+ ts->x_plate_ohm = pdata->ts_x_plate_ohm ? : 280;
+ ts->hw_avg_max = pdata->ts_hw_avg;
+ ts->max_pressure= pdata->ts_max_pressure ? : MAX_12BIT;
+ ts->touch_pressure = pdata->ts_touch_pressure ? : ts->max_pressure;
+ ts->ignore_last = pdata->ts_ignore_last;
+ ts->stab_time = pdata->ts_stab_time;
+
+ if ((r = tsc2301_ts_check_config(ts, &ts->hw_flags))) {
+ dev_err(&tsc->spi->dev, "invalid configuration\n");
+ goto err2;
+ }
+
+ idev = input_allocate_device();
+ if (idev == NULL) {
+ r = -ENOMEM;
+ goto err2;
+ }
+ idev->name = "TSC2301 touchscreen";
+ snprintf(ts->phys, sizeof(ts->phys),
+ "%s/input-ts", tsc->spi->dev.bus_id);
+ idev->phys = ts->phys;
+
+ idev->evbit[0] = BIT(EV_ABS) | BIT(EV_KEY);
+ idev->absbit[0] = BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE);
+ ts->idev = idev;
+
+ tsc2301_ts_setup_spi_xfer(tsc);
+
+ /* These parameters should perhaps be configurable? */
+ input_set_abs_params(idev, ABS_X, 0, 4096, 0, 0);
+ input_set_abs_params(idev, ABS_Y, 0, 4096, 0, 0);
+ input_set_abs_params(idev, ABS_PRESSURE, 0, 1024, 0, 0);
+
+ tsc2301_ts_start_scan(tsc);
+
+ ts->irq_enabled = 1;
+ r = request_irq(ts->irq, tsc2301_ts_irq_handler,
+ SA_SAMPLE_RANDOM | SA_TRIGGER_FALLING,
+ "tsc2301-ts", tsc);
+ if (r < 0) {
+ dev_err(&tsc->spi->dev, "unable to get DAV IRQ");
+ goto err3;
+ }
+ set_irq_wake(ts->irq, 1);
+
+ if (device_create_file(&tsc->spi->dev, &dev_attr_pen_down) < 0)
+ goto err4;
+ if (device_create_file(&tsc->spi->dev, &dev_attr_disable_ts) < 0)
+ goto err5;
+
+ r = input_register_device(idev);
+ if (r < 0) {
+ dev_err(&tsc->spi->dev, "can't register touchscreen device\n");
+ goto err6;
+ }
+
+ return 0;
+err6:
+ device_remove_file(&tsc->spi->dev, &dev_attr_disable_ts);
+err5:
+ device_remove_file(&tsc->spi->dev, &dev_attr_pen_down);
+err4:
+ free_irq(ts->irq, tsc);
+err3:
+ tsc2301_ts_stop_scan(tsc);
+ input_free_device(idev);
+err2:
+#ifdef CONFIG_ARCH_OMAP
+ omap_free_gpio(dav_gpio);
+#endif
+err1:
+ kfree(ts);
+ return r;
+}
+
+void __devexit tsc2301_ts_exit(struct tsc2301 *tsc)
+{
+ struct tsc2301_ts *ts = tsc->ts;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ts->lock, flags);
+ tsc2301_ts_disable(tsc);
+ spin_unlock_irqrestore(&ts->lock, flags);
+
+ device_remove_file(&tsc->spi->dev, &dev_attr_disable_ts);
+ device_remove_file(&tsc->spi->dev, &dev_attr_pen_down);
+
+ free_irq(ts->irq, tsc);
+ input_unregister_device(ts->idev);
+
+#ifdef CONFIG_ARCH_OMAP
+ omap_free_gpio(ts->dav_gpio);
+#endif
+ kfree(ts);
+}
+MODULE_AUTHOR("Jarkko Oikarinen <jarkko.oikarinen@nokia.com>");
+MODULE_LICENSE("GPL");
projects / linux-2.6-omap-h63xx.git / blobdiff