Use the number of touchscreen wires (tsc_wires) instead of the flag
indicating a touchscreen cell (tsc_cell) to mimic the logic from the
probe.

Besides keeping a certain harmony in the driver, the main benefit is
that we are going to simplify the number of entries in the main MFD
structure and tsc_cell can now be removed more easily.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
---
 drivers/mfd/ti_am335x_tscadc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mfd/ti_am335x_tscadc.c b/drivers/mfd/ti_am335x_tscadc.c
index 0cea44b4bd1a..c25c7f5c101b 100644
--- a/drivers/mfd/ti_am335x_tscadc.c
+++ b/drivers/mfd/ti_am335x_tscadc.c

@@ -320,7 +320,7 @@ static int __maybe_unused tscadc_resume(struct device *dev)
 	ctrl = CNTRLREG_STEPCONFIGWRT |	CNTRLREG_STEPID;
 	regmap_write(tscadc->regmap, REG_CTRL, ctrl);
 
-	if (tscadc->tsc_cell != -1) {
+	if (tscadc->tsc_wires > 0) {
 		if (tscadc->tsc_wires == 5)
 			ctrl |= CNTRLREG_5WIRE | CNTRLREG_TSCENB;
 		else

-- 
2.27.0