};
struct ads7846 {
- struct input_dev input;
+ struct input_dev *input;
char phys[32];
struct spi_device *spi;
struct ser_req *req = kzalloc(sizeof *req, SLAB_KERNEL);
int status;
int sample;
- int i;
+ int i;
if (!req)
return -ENOMEM;
static void ads7846_rx(void *ads)
{
- struct ads7846 *ts = ads;
- unsigned Rt;
- unsigned sync = 0;
- u16 x, y, z1, z2;
- unsigned long flags;
+ struct ads7846 *ts = ads;
+ struct input_dev *input_dev = ts->input;
+ unsigned Rt;
+ unsigned sync = 0;
+ u16 x, y, z1, z2;
+ unsigned long flags;
/* adjust: 12 bit samples (left aligned), built from
* two 8 bit values writen msb-first.
* won't notice that, even if nPENIRQ never fires ...
*/
if (!ts->pendown && Rt != 0) {
- input_report_key(&ts->input, BTN_TOUCH, 1);
+ input_report_key(input_dev, BTN_TOUCH, 1);
sync = 1;
} else if (ts->pendown && Rt == 0) {
- input_report_key(&ts->input, BTN_TOUCH, 0);
+ input_report_key(input_dev, BTN_TOUCH, 0);
sync = 1;
}
if (Rt) {
- input_report_abs(&ts->input, ABS_X, x);
- input_report_abs(&ts->input, ABS_Y, y);
- input_report_abs(&ts->input, ABS_PRESSURE, Rt);
+ input_report_abs(input_dev, ABS_X, x);
+ input_report_abs(input_dev, ABS_Y, y);
+ input_report_abs(input_dev, ABS_PRESSURE, Rt);
sync = 1;
}
if (sync)
- input_sync(&ts->input);
+ input_sync(input_dev);
#ifdef VERBOSE
if (Rt || ts->pendown)
static int __devinit ads7846_probe(struct spi_device *spi)
{
struct ads7846 *ts;
+ struct input_dev *input_dev;
struct ads7846_platform_data *pdata = spi->dev.platform_data;
struct spi_transfer *x;
int i;
+ int err;
if (!spi->irq) {
dev_dbg(&spi->dev, "no IRQ?\n");
* to discard the four garbage LSBs.
*/
- if (!(ts = kzalloc(sizeof(struct ads7846), GFP_KERNEL)))
- return -ENOMEM;
+ ts = kzalloc(sizeof(struct ads7846), GFP_KERNEL);
+ input_dev = input_allocate_device();
+ if (!ts || !input_dev) {
+ err = -ENOMEM;
+ goto err_free_mem;
+ }
dev_set_drvdata(&spi->dev, ts);
+ spi->dev.power.power_state = PMSG_ON;
ts->spi = spi;
- spi->dev.power.power_state = PMSG_ON;
+ ts->input = input_dev;
init_timer(&ts->timer);
ts->timer.data = (unsigned long) ts;
ts->vref_delay_usecs = pdata->vref_delay_usecs ? : 100;
ts->x_plate_ohms = pdata->x_plate_ohms ? : 400;
- init_input_dev(&ts->input);
+ snprintf(ts->phys, sizeof(ts->phys), "%s/input0", spi->dev.bus_id);
- ts->input.dev = &spi->dev;
- ts->input.name = "ADS784x Touchscreen";
- snprintf(ts->phys, sizeof ts->phys, "%s/input0", spi->dev.bus_id);
- ts->input.phys = ts->phys;
+ input_dev->name = "ADS784x Touchscreen";
+ input_dev->phys = ts->phys;
+ input_dev->cdev.dev = &spi->dev;
- ts->input.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
- ts->input.keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
- input_set_abs_params(&ts->input, ABS_X,
+ input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
+ input_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
+ input_set_abs_params(input_dev, ABS_X,
pdata->x_min ? : 0,
pdata->x_max ? : MAX_12BIT,
0, 0);
- input_set_abs_params(&ts->input, ABS_Y,
+ input_set_abs_params(input_dev, ABS_Y,
pdata->y_min ? : 0,
pdata->y_max ? : MAX_12BIT,
0, 0);
- input_set_abs_params(&ts->input, ABS_PRESSURE,
+ input_set_abs_params(input_dev, ABS_PRESSURE,
pdata->pressure_min, pdata->pressure_max, 0, 0);
- input_register_device(&ts->input);
-
/* set up the transfers to read touchscreen state; this assumes we
* use formula #2 for pressure, not #3.
*/
SA_SAMPLE_RANDOM | SA_TRIGGER_FALLING,
spi->dev.bus_id, ts)) {
dev_dbg(&spi->dev, "irq %d busy?\n", spi->irq);
- input_unregister_device(&ts->input);
- kfree(ts);
- return -EBUSY;
+ err = -EBUSY;
+ goto err_free_mem;
}
dev_info(&spi->dev, "touchscreen, irq %d\n", spi->irq);
device_create_file(&spi->dev, &dev_attr_vbatt);
device_create_file(&spi->dev, &dev_attr_vaux);
+ err = input_register_device(input_dev);
+ if (err)
+ goto err_free_irq;
+
return 0;
+
+ err_free_irq:
+ free_irq(spi->irq, ts);
+ err_free_mem:
+ input_free_device(input_dev);
+ kfree(ts);
+ return err;
}
static int __devexit ads7846_remove(struct spi_device *spi)
device_remove_file(&spi->dev, &dev_attr_vbatt);
device_remove_file(&spi->dev, &dev_attr_vaux);
- input_unregister_device(&ts->input);
+ input_unregister_device(ts->input);
kfree(ts);
dev_dbg(&spi->dev, "unregistered touchscreen\n");