mfd: Add pdata to set mc13783-ts conversion delay
MC13783 can be programmed to wait some clock cycles between the
touchscreen polarization and the resistance conversion. This is
needed to adjust for touchscreens with high capacitance between
plates.
Signed-off-by: Michael Thalmeier <michael.thalmeier@hale.at>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/mc13xxx-core.c b/drivers/mfd/mc13xxx-core.c
index 7122386..9fd4f63 100644
--- a/drivers/mfd/mc13xxx-core.c
+++ b/drivers/mfd/mc13xxx-core.c
@@ -560,6 +560,8 @@
#define MC13XXX_ADC1_CHAN0_SHIFT 5
#define MC13XXX_ADC1_CHAN1_SHIFT 8
+#define MC13783_ADC1_ATO_SHIFT 11
+#define MC13783_ADC1_ATOX (1 << 19)
struct mc13xxx_adcdone_data {
struct mc13xxx *mc13xxx;
@@ -580,7 +582,8 @@
#define MC13XXX_ADC_WORKING (1 << 0)
int mc13xxx_adc_do_conversion(struct mc13xxx *mc13xxx, unsigned int mode,
- unsigned int channel, unsigned int *sample)
+ unsigned int channel, u8 ato, bool atox,
+ unsigned int *sample)
{
u32 adc0, adc1, old_adc0;
int i, ret;
@@ -631,6 +634,9 @@
return -EINVAL;
}
+ adc1 |= ato << MC13783_ADC1_ATO_SHIFT;
+ if (atox)
+ adc1 |= MC13783_ADC1_ATOX;
dev_dbg(&mc13xxx->spidev->dev, "%s: request irq\n", __func__);
mc13xxx_irq_request(mc13xxx, MC13XXX_IRQ_ADCDONE,
mc13xxx_handler_adcdone, __func__, &adcdone_data);
@@ -813,7 +819,8 @@
mc13xxx_add_subdevice(mc13xxx, "%s-rtc");
if (mc13xxx->flags & MC13XXX_USE_TOUCHSCREEN)
- mc13xxx_add_subdevice(mc13xxx, "%s-ts");
+ mc13xxx_add_subdevice_pdata(mc13xxx, "%s-ts",
+ &pdata->touch, sizeof(pdata->touch));
if (pdata) {
mc13xxx_add_subdevice_pdata(mc13xxx, "%s-regulator",