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:
> > 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
