The mc13xxx ICs have the ability to add a small delay in between each
sample taken in a set of TS samples. This allows time for the ts to be
biased correctly, and improved accuracy of raw readings.
Signed-off-by: Marc Reilly <marc@xxxxxxxxxxxxxxx>
---
drivers/input/touchscreen/mc13xxx_ts.c | 8 ++++++--
1 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/input/touchscreen/mc13xxx_ts.c b/drivers/input/touchscreen/mc13xxx_ts.c
index 8924d66..f46e49d 100644
--- a/drivers/input/touchscreen/mc13xxx_ts.c
+++ b/drivers/input/touchscreen/mc13xxx_ts.c
@@ -197,9 +197,13 @@ static void mc13xxx_ts_work(struct work_struct *work)
container_of(work, struct mc13xxx_ts_priv, work.work);
unsigned int mode = MC13XXX_ADC_MODE_TS;
unsigned int channel = 12;
+ u32 adc1_mask = MC13XXX_ADC1_ATOX | MC13XXX_ADC1_ATO_MASK;
+ u32 adc1_val = MC13XXX_ADC1_ATOX | (3 << MC13XXX_ADC1_ATO_SHIFT);
- if (mc13xxx_adc_do_conversion(priv->mc13xxx,
- mode, channel, priv->sample) == 0) {
+ if (mc13xxx_adc_do_conversion_ex(priv->mc13xxx,
+ mode, channel, priv->sample,
+ 0, 0,
+ adc1_mask, adc1_val) == 0) {
mc13xxx_ts_report_sample(priv);
} else {
dev_warn(&priv->idev->dev, "bad conversion");
--
1.7.3.4
--
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