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Input: ads7846 - convert to to dynamic input_dev allocation

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Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Dmitry Torokhov 2006-02-15 00:49:22 -05:00
parent b8044c74bc
commit a90f7e98b7
1 changed files with 47 additions and 32 deletions
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79
drivers/input/touchscreen/ads7846.c
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@ -60,7 +60,7 @@ struct ts_event {
};
struct ads7846 {
struct input_dev input;
struct input_dev *input;
char phys[32];
struct spi_device *spi;
@ -152,7 +152,7 @@ static int ads7846_read12_ser(struct device *dev, unsigned command)
struct ser_req *req = kzalloc(sizeof *req, SLAB_KERNEL);
int status;
int sample;
int i;
int i;
if (!req)
return -ENOMEM;
@ -236,11 +236,12 @@ SHOW(vbatt)
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.
@ -276,21 +277,21 @@ static void ads7846_rx(void *ads)
* 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)
@ -396,9 +397,11 @@ static int ads7846_resume(struct spi_device *spi)
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");
@ -423,13 +426,18 @@ static int __devinit ads7846_probe(struct spi_device *spi)
* 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;
@ -439,28 +447,25 @@ static int __devinit ads7846_probe(struct spi_device *spi)
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.
*/
@ -510,9 +515,8 @@ static int __devinit ads7846_probe(struct spi_device *spi)
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);
@ -534,7 +538,18 @@ static int __devinit ads7846_probe(struct spi_device *spi)
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)
@ -554,7 +569,7 @@ 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");