tsc2007: fail registration on i2c error

Return an error on probe if i2c errors occur indicating the device
is not present.

Signed-off-by: Rob Herring <r.herring@freescale.com>

diff --git a/drivers/input/touchscreen/tsc2007.c b/drivers/input/touchscreen/tsc2007.c
index fadc11545b1eed03124b1c6cd152db8c737345de..da7432726c9960b4caee0acf0be01a3fbe848639 100644 (file)
--- a/drivers/input/touchscreen/tsc2007.c
+++ b/drivers/input/touchscreen/tsc2007.c
@@ -300,6 +300,13 @@ static int __devinit tsc2007_probe(struct i2c_client *client,
        ts->get_pendown_state = pdata->get_pendown_state;
        ts->clear_penirq      = pdata->clear_penirq;
 
+       pdata->init_platform_hw();
+
+       if (tsc2007_xfer(ts, PWRDOWN) < 0) {
+               err = -ENODEV;
+               goto err_no_dev;
+       }
+
        snprintf(ts->phys, sizeof(ts->phys),
                 "%s/input0", dev_name(&client->dev));
 
@@ -344,6 +351,8 @@ static int __devinit tsc2007_probe(struct i2c_client *client,
                pdata->exit_platform_hw();
  err_free_mem:
        input_free_device(input_dev);
+ err_no_dev:
+       pdata->exit_platform_hw();
        kfree(ts);
        return err;
 }