static int __maybe_unused ucb1400_ts_suspend(struct device *dev)
{
struct ucb1400_ts *ucb = dev_get_platdata(dev);
struct input_dev *idev = ucb->ts_idev;
mutex_lock(&idev->mutex);
if (idev->users)
ucb1400_ts_stop(ucb);
mutex_unlock(&idev->mutex);
return 0;
}
static int ucb1400_ts_resume(struct device *dev)
{
struct ucb1400_ts *ucb = dev->platform_data;
struct input_dev *idev = ucb->ts_idev;
mutex_lock(&idev->mutex);
if (idev->users)
ucb1400_ts_stop(ucb);
mutex_unlock(&idev->mutex);
return 0;
}
static int ucb1400_ts_probe(struct platform_device *pdev)
{
struct ucb1400_ts *ucb = dev_get_platdata(&pdev->dev);
int error, x_res, y_res;
u16 fcsr;
ucb->ts_idev = input_allocate_device();
if (!ucb->ts_idev) {
error = -ENOMEM;
goto err;
}
/* Only in case the IRQ line wasn't supplied, try detecting it */
if (ucb->irq < 0) {
error = ucb1400_ts_detect_irq(ucb, pdev);
if (error) {
dev_err(&pdev->dev, "IRQ probe failed\n");
goto err_free_devs;
}
}
dev_dbg(&pdev->dev, "found IRQ %d\n", ucb->irq);
init_waitqueue_head(&ucb->ts_wait);
input_set_drvdata(ucb->ts_idev, ucb);
ucb->ts_idev->dev.parent = &pdev->dev;
ucb->ts_idev->name = "UCB1400 touchscreen interface";
ucb->ts_idev->id.vendor = ucb1400_reg_read(ucb->ac97,
AC97_VENDOR_ID1);
ucb->ts_idev->id.product = ucb->id;
ucb->ts_idev->open = ucb1400_ts_open;
ucb->ts_idev->close = ucb1400_ts_close;
ucb->ts_idev->evbit[0] = BIT_MASK(EV_ABS) | BIT_MASK(EV_KEY);
ucb->ts_idev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
/*
* Enable ADC filter to prevent horrible jitter on Colibri.
* This also further reduces jitter on boards where ADCSYNC
* pin is connected.
*/
fcsr = ucb1400_reg_read(ucb->ac97, UCB_FCSR);
ucb1400_reg_write(ucb->ac97, UCB_FCSR, fcsr | UCB_FCSR_AVE);
ucb1400_adc_enable(ucb->ac97);
x_res = ucb1400_ts_read_xres(ucb);
y_res = ucb1400_ts_read_yres(ucb);
ucb1400_adc_disable(ucb->ac97);
dev_dbg(&pdev->dev, "x/y = %d/%d\n", x_res, y_res);
input_set_abs_params(ucb->ts_idev, ABS_X, 0, x_res, 0, 0);
input_set_abs_params(ucb->ts_idev, ABS_Y, 0, y_res, 0, 0);
input_set_abs_params(ucb->ts_idev, ABS_PRESSURE, 0, 0, 0, 0);
ucb1400_ts_stop(ucb);
error = request_threaded_irq(ucb->irq, NULL, ucb1400_irq,
IRQF_TRIGGER_RISING | IRQF_ONESHOT,
"UCB1400", ucb);
if (error) {
dev_err(&pdev->dev,
"unable to grab irq%d: %d\n", ucb->irq, error);
goto err_free_devs;
}
error = input_register_device(ucb->ts_idev);
if (error)
goto err_free_irq;
return 0;
err_free_irq:
free_irq(ucb->irq, ucb);
err_free_devs:
input_free_device(ucb->ts_idev);
err:
return error;
}
static void ucb1400_ts_close(struct input_dev *idev)
{
struct ucb1400_ts *ucb = input_get_drvdata(idev);
ucb1400_ts_stop(ucb);
}
