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>
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@ -310,6 +310,12 @@ static int __devinit tsc2007_probe(struct i2c_client *client,
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ts->get_pendown_state = pdata->get_pendown_state;
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ts->get_pendown_state = pdata->get_pendown_state;
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ts->clear_penirq = pdata->clear_penirq;
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ts->clear_penirq = pdata->clear_penirq;
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if (pdata->x_plate_ohms == 0) {
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dev_err(&client->dev, "x_plate_ohms is not set up in platform data");
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err = -EINVAL;
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goto err_free_mem;
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}
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snprintf(ts->phys, sizeof(ts->phys),
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snprintf(ts->phys, sizeof(ts->phys),
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"%s/input0", dev_name(&client->dev));
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"%s/input0", dev_name(&client->dev));
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@ -5,7 +5,7 @@
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struct tsc2007_platform_data {
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struct tsc2007_platform_data {
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u16 model; /* 2007. */
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u16 model; /* 2007. */
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u16 x_plate_ohms;
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u16 x_plate_ohms; /* must be non-zero value */
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u16 max_rt; /* max. resistance above which samples are ignored */
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u16 max_rt; /* max. resistance above which samples are ignored */
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unsigned long poll_delay; /* delay (in ms) after pen-down event
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unsigned long poll_delay; /* delay (in ms) after pen-down event
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before polling starts */
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before polling starts */
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