[PATCH v3 3/4] iio: adc: aspeed: Replace mdelay() with fsleep() for ADC stabilization delay

[Billy Tsai]

The ADC stabilization delays in compensation mode and battery sensing
mode do not require atomic context. Using mdelay() here results in
unnecessary busy waiting.

Replace mdelay(1) with fsleep(1000) to allow the scheduler to run other
tasks while waiting for the ADC to stabilize.

Also fix a minor typo in the comment ("adc" -> "ADC").

Suggested-by: Andy Shevchenko <andriy.shevchenko at linux.intel.com>
Signed-off-by: Billy Tsai <billy_tsai at aspeedtech.com>
---
 drivers/iio/adc/aspeed_adc.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/iio/adc/aspeed_adc.c b/drivers/iio/adc/aspeed_adc.c
index 3ff24474f394..a1a6296d3003 100644
--- a/drivers/iio/adc/aspeed_adc.c
+++ b/drivers/iio/adc/aspeed_adc.c
@@ -259,7 +259,7 @@ static int aspeed_adc_compensation(struct iio_dev *indio_dev)
 	 * After enable compensating sensing mode need to wait some time for ADC stable
 	 * Experiment result is 1ms.
 	 */
-	mdelay(1);
+	fsleep(1000);
 
 	for (index = 0; index < 16; index++) {
 		/*
@@ -314,10 +314,10 @@ static int aspeed_adc_read_raw(struct iio_dev *indio_dev,
 				       ASPEED_ADC_BAT_SENSING_ENABLE,
 			       data->base + ASPEED_REG_ENGINE_CONTROL);
 			/*
-			 * After enable battery sensing mode need to wait some time for adc stable
+			 * After enable battery sensing mode need to wait some time for ADC stable
 			 * Experiment result is 1ms.
 			 */
-			mdelay(1);
+			fsleep(1000);
 			*val = readw(data->base + chan->address);
 			*val = (*val * data->battery_mode_gain.mult) /
 			       data->battery_mode_gain.div;

-- 
2.34.1