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mfd: Don't set mc13783 ADREFMODE for touch conversions 

Setting ADREFMODE is utter nonsense, but that's hard to read out of the
spec.  Strange enough it's possible to read x and y values even when
it's set.  When unset you can get values not only for the axes, but also
for contact resistance which allows the touch driver to report pressure
values.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Uwe Kleine-König 2009-12-02 19:54:31 +01:00 committed by Samuel Ortiz
parent ed89a7551c
commit be26d664de
1 changed files with 2 additions and 2 deletions
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4
drivers/mfd/mc13783-core.c
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@ -462,8 +462,8 @@ int mc13783_adc_do_conversion(struct mc13783 *mc13783, unsigned int mode,
switch (mode) {
case MC13783_ADC_MODE_TS:
adc0 |= MC13783_ADC0_ADREFEN | MC13783_ADC0_ADREFMODE
| MC13783_ADC0_TSMOD0 | MC13783_ADC0_TSMOD1;
adc0 |= MC13783_ADC0_ADREFEN | MC13783_ADC0_TSMOD0 |
MC13783_ADC0_TSMOD1;
adc1 |= 4 << MC13783_ADC1_CHAN1_SHIFT;
break;