diff options
| author | Philip Rakity <prakity@marvell.com> | 2011-10-11 20:54:55 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2011-10-11 20:56:41 -0700 |
| commit | 341deefe8f4584b09564193cb46d8cf386f491a5 (patch) | |
| tree | 6610d3c3c0306e3b1a8e82552f5e426818ff5a57 | |
| parent | 550eca7cafa1c6e2c077afb2211a364a982d8645 (diff) | |
Input: tsc2007 - make sure that X plate resistance is specified
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>
| -rw-r--r-- | drivers/input/touchscreen/tsc2007.c | 6 | ||||
| -rw-r--r-- | include/linux/i2c/tsc2007.h | 2 |
2 files changed, 7 insertions, 1 deletions
diff --git a/drivers/input/touchscreen/tsc2007.c b/drivers/input/touchscreen/tsc2007.c index 0acca68cc52b..1f674cb6c55b 100644 --- a/drivers/input/touchscreen/tsc2007.c +++ b/drivers/input/touchscreen/tsc2007.c @@ -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)); diff --git a/include/linux/i2c/tsc2007.h b/include/linux/i2c/tsc2007.h index 591427a63b06..506a9f7af51e 100644 --- a/include/linux/i2c/tsc2007.h +++ b/include/linux/i2c/tsc2007.h @@ -5,7 +5,7 @@ struct tsc2007_platform_data { u16 model; /* 2007. */ - u16 x_plate_ohms; + u16 x_plate_ohms; /* must be non-zero value */ u16 max_rt; /* max. resistance above which samples are ignored */ unsigned long poll_delay; /* delay (in ms) after pen-down event before polling starts */ |