diff mbox series

[v3,41/47] iio: adc: ti_am335x_adc: Gather the checks on the delays

Message ID 20210915155908.476767-42-miquel.raynal@bootlin.com
State Accepted
Commit b61a9d32d2d7339aaa59c50f6e33e8a79f7944e7
Headers show
Series TI AM437X ADC1 | expand

Commit Message

Miquel Raynal Sept. 15, 2021, 3:59 p.m. UTC 
Move the checks over the delays provided in the device tree to the
location where these values are read to clarify where they come from.

There are no functional changes besides the device structure used to
display the warnings: let's use the ADC instead of the MFD device.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 drivers/iio/adc/ti_am335x_adc.c | 50 ++++++++++++++++++++-------------
 1 file changed, 30 insertions(+), 20 deletions(-)
diff mbox series

Patch

diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c
index aa151d702a14..6f47a1ace3d4 100644
--- a/drivers/iio/adc/ti_am335x_adc.c
+++ b/drivers/iio/adc/ti_am335x_adc.c
@@ -107,7 +107,6 @@  static int tiadc_wait_idle(struct tiadc_device *adc_dev)
 static void tiadc_step_config(struct iio_dev *indio_dev)
 {
 	struct tiadc_device *adc_dev = iio_priv(indio_dev);
-	struct device *dev = adc_dev->mfd_tscadc->dev;
 	unsigned int stepconfig;
 	int i, steps = 0;
 
@@ -125,12 +124,6 @@  static void tiadc_step_config(struct iio_dev *indio_dev)
 
 		chan = adc_dev->channel_line[i];
 
-		if (adc_dev->step_avg[i] > STEPCONFIG_AVG_16) {
-			dev_warn(dev, "chan %d: wrong step avg, truncated to %ld\n",
-				 chan, STEPCONFIG_AVG_16);
-			adc_dev->step_avg[i] = STEPCONFIG_AVG_16;
-		}
-
 		if (adc_dev->step_avg[i])
 			stepconfig = STEPCONFIG_AVG(ffs(adc_dev->step_avg[i]) - 1) |
 				     STEPCONFIG_FIFO1;
@@ -145,18 +138,6 @@  static void tiadc_step_config(struct iio_dev *indio_dev)
 			     STEPCONFIG_INM_ADCREFM | STEPCONFIG_RFP_VREFP |
 			     STEPCONFIG_RFM_VREFN);
 
-		if (adc_dev->open_delay[i] > STEPCONFIG_MAX_OPENDLY) {
-			dev_warn(dev, "chan %d: wrong open delay, truncated to 0x%lX\n",
-				 chan, STEPCONFIG_MAX_OPENDLY);
-			adc_dev->open_delay[i] = STEPCONFIG_MAX_OPENDLY;
-		}
-
-		if (adc_dev->sample_delay[i] > STEPCONFIG_MAX_SAMPLE) {
-			dev_warn(dev, "chan %d: wrong sample delay, truncated to 0x%lX\n",
-				 chan, STEPCONFIG_MAX_SAMPLE);
-			adc_dev->sample_delay[i] = STEPCONFIG_MAX_SAMPLE;
-		}
-
 		tiadc_writel(adc_dev, REG_STEPDELAY(steps),
 			     STEPDELAY_OPEN(adc_dev->open_delay[i]) |
 			     STEPDELAY_SAMPLE(adc_dev->sample_delay[i]));
@@ -572,6 +553,7 @@  static int tiadc_parse_dt(struct platform_device *pdev,
 	const __be32 *cur;
 	int channels = 0;
 	u32 val;
+	int i;
 
 	of_property_for_each_u32(node, "ti,adc-channels", prop, cur, val) {
 		adc_dev->channel_line[channels] = val;
@@ -584,6 +566,8 @@  static int tiadc_parse_dt(struct platform_device *pdev,
 		channels++;
 	}
 
+	adc_dev->channels = channels;
+
 	of_property_read_u32_array(node, "ti,chan-step-avg",
 				   adc_dev->step_avg, channels);
 	of_property_read_u32_array(node, "ti,chan-step-opendelay",
@@ -591,7 +575,33 @@  static int tiadc_parse_dt(struct platform_device *pdev,
 	of_property_read_u32_array(node, "ti,chan-step-sampledelay",
 				   adc_dev->sample_delay, channels);
 
-	adc_dev->channels = channels;
+	for (i = 0; i < adc_dev->channels; i++) {
+		int chan;
+
+		chan = adc_dev->channel_line[i];
+
+		if (adc_dev->step_avg[i] > STEPCONFIG_AVG_16) {
+			dev_warn(&pdev->dev,
+				 "chan %d: wrong step avg, truncated to %ld\n",
+				 chan, STEPCONFIG_AVG_16);
+			adc_dev->step_avg[i] = STEPCONFIG_AVG_16;
+		}
+
+		if (adc_dev->open_delay[i] > STEPCONFIG_MAX_OPENDLY) {
+			dev_warn(&pdev->dev,
+				 "chan %d: wrong open delay, truncated to 0x%lX\n",
+				 chan, STEPCONFIG_MAX_OPENDLY);
+			adc_dev->open_delay[i] = STEPCONFIG_MAX_OPENDLY;
+		}
+
+		if (adc_dev->sample_delay[i] > STEPCONFIG_MAX_SAMPLE) {
+			dev_warn(&pdev->dev,
+				 "chan %d: wrong sample delay, truncated to 0x%lX\n",
+				 chan, STEPCONFIG_MAX_SAMPLE);
+			adc_dev->sample_delay[i] = STEPCONFIG_MAX_SAMPLE;
+		}
+	}
+
 	return 0;
 }