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Input: tsc2007 - make sure that X plate resistance is specified

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Abort driver initialization if X plate resistance was not specified in
platform data as it will cause pressure to be always calculated as 0,
and making userspace ignore touch coordinates.

Signed-off-by: Philip Rakity <prakity@marvell.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Philip Rakity
2011-10-11 20:54:55 -07:00
committed by Dmitry Torokhov
parent 550eca7caf
commit 341deefe8f
2 changed files with 7 additions and 1 deletions
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6
drivers/input/touchscreen/tsc2007.c
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@@ -310,6 +310,12 @@ static int __devinit tsc2007_probe(struct i2c_client *client,
ts->get_pendown_state = pdata->get_pendown_state;
ts->clear_penirq = pdata->clear_penirq;
if (pdata->x_plate_ohms == 0) {
dev_err(&client->dev, "x_plate_ohms is not set up in platform data");
err = -EINVAL;
goto err_free_mem;
}
snprintf(ts->phys, sizeof(ts->phys),
"%s/input0", dev_name(&client->dev));