[PATCH v2] iio: adc: at91_adc: change at91_ts_sample to return void

[Antoniu Miclaus <antoniu.miclaus@analog.com>]

The return value of at91_ts_sample() is never checked by its caller.
Change the return type to void to make this explicit. The error
conditions are already logged via dev_err() which provides sufficient
visibility into hardware issues.

Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
---
Changes in v2:
 - Changed return type to void instead of replacing -1 with -EIO,
   since the return value is never checked by the caller.

 drivers/iio/adc/at91_adc.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
index 920dd9ffd27a..8942d15b3978 100644
--- a/drivers/iio/adc/at91_adc.c
+++ b/drivers/iio/adc/at91_adc.c
@@ -304,7 +304,7 @@ static void handle_adc_eoc_trigger(int irq, struct iio_dev *idev)
 	}
 }
 
-static int at91_ts_sample(struct iio_dev *idev)
+static void at91_ts_sample(struct iio_dev *idev)
 {
 	struct at91_adc_state *st = iio_priv(idev);
 	unsigned int xscale, yscale, reg, z1, z2;
@@ -323,7 +323,7 @@ static int at91_ts_sample(struct iio_dev *idev)
 	xscale = (reg >> 16) & xyz_mask;
 	if (xscale == 0) {
 		dev_err(&idev->dev, "Error: xscale == 0!\n");
-		return -1;
+		return;
 	}
 	x /= xscale;
 
@@ -334,7 +334,7 @@ static int at91_ts_sample(struct iio_dev *idev)
 	yscale = (reg >> 16) & xyz_mask;
 	if (yscale == 0) {
 		dev_err(&idev->dev, "Error: yscale == 0!\n");
-		return -1;
+		return;
 	}
 	y /= yscale;
 
@@ -363,8 +363,6 @@ static int at91_ts_sample(struct iio_dev *idev)
 	} else {
 		dev_dbg(&idev->dev, "pressure too low: not reporting\n");
 	}
-
-	return 0;
 }
 
 static irqreturn_t at91_adc_rl_interrupt(int irq, void *private)
-- 
2.43.0