On Mon, May 03, 2021 at 01:07:20PM +0300, Dan Carpenter wrote:

On Sat, May 01, 2021 at 09:32:53AM -0300, Lucas Stankus wrote:

quoted

diff --git a/drivers/staging/iio/cdc/ad7746.c b/drivers/staging/iio/cdc/ad7746.c
index dfd71e99e872..531f1b96dea2 100644
--- a/drivers/staging/iio/cdc/ad7746.c
+++ b/drivers/staging/iio/cdc/ad7746.c

@@ -18,8 +18,6 @@
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
 
-#include "ad7746.h"
-
 /*
  * AD7746 Register Definition
  */

@@ -676,10 +674,11 @@ static const struct iio_info ad7746_info = {
 static int ad7746_probe(struct i2c_client *client,
 			const struct i2c_device_id *id)
 {
-	struct ad7746_platform_data *pdata = client->dev.platform_data;
+	struct device *dev = &client->dev;
 	struct ad7746_chip_info *chip;
 	struct iio_dev *indio_dev;
 	unsigned char regval = 0;
+	unsigned int vdd_permille;
 	int ret = 0;
 
 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip));

@@ -703,26 +702,39 @@ static int ad7746_probe(struct i2c_client *client,
 	indio_dev->num_channels = ARRAY_SIZE(ad7746_channels);
 	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	if (pdata) {
-		if (pdata->exca_en) {
-			if (pdata->exca_inv_en)
-				regval |= AD7746_EXCSETUP_NEXCA;
-			else
-				regval |= AD7746_EXCSETUP_EXCA;
-		}
+	if (device_property_read_bool(dev, "adi,exca-output-en")) {
+		if (device_property_read_bool(dev, "adi,exca-output-invert"))
+			regval |= AD7746_EXCSETUP_NEXCA;
+		else
+			regval |= AD7746_EXCSETUP_EXCA;
+	}
 
-		if (pdata->excb_en) {
-			if (pdata->excb_inv_en)
-				regval |= AD7746_EXCSETUP_NEXCB;
-			else
-				regval |= AD7746_EXCSETUP_EXCB;
-		}
+	if (device_property_read_bool(dev, "adi,excb-output-en")) {
+		if (device_property_read_bool(dev, "adi,excb-output-invert"))
+			regval |= AD7746_EXCSETUP_NEXCB;
+		else
+			regval |= AD7746_EXCSETUP_EXCB;
+	}
 
-		regval |= AD7746_EXCSETUP_EXCLVL(pdata->exclvl);
-	} else {
-		dev_warn(&client->dev, "No platform data? using default\n");
-		regval = AD7746_EXCSETUP_EXCA | AD7746_EXCSETUP_EXCB |
-			AD7746_EXCSETUP_EXCLVL(3);
+	ret = device_property_read_u32(dev, "adi,excitation-vdd-permille",
+				       &vdd_permille);
+	if (!ret) {

This test is reversed.  I wonder if the static checkers can catch the
uninitialized variable bug...  It's probably better to write it as:

	if (device_property_read_u32(dev, "adi,excitation-vdd-permille",
				     &vdd_permille) {

So it matches the others.

Oops.  Sorry for the noise.  I was wrong on this.  I looked at the
device_property_read_bool() code instead of the device_property_read_u32().

It's disappointing that the returns are reversed.

regards,
dan carpenter