[PATCH 2/3] staging: iio: cdc: ad7746: use dt bindings to set the EXCx pins output

[Lucas Stankus]

Ditch platform_data fields in favor of device tree properties for
configuring EXCA and EXCB output.
This also removes the fields from the platform_data struct, since they're
not used anymore.

Signed-off-by: Lucas Stankus <lucas.p.stan...@gmail.com>
---
 drivers/staging/iio/cdc/ad7746.c | 33 +++++++++++++++++---------------
 drivers/staging/iio/cdc/ad7746.h |  4 ----
 2 files changed, 18 insertions(+), 19 deletions(-)

diff --git a/drivers/staging/iio/cdc/ad7746.c b/drivers/staging/iio/cdc/ad7746.c
index dfd71e99e872..63041b164dbe 100644
--- a/drivers/staging/iio/cdc/ad7746.c
+++ b/drivers/staging/iio/cdc/ad7746.c
@@ -677,8 +677,10 @@ 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_node *np = client->dev.of_node;
        struct ad7746_chip_info *chip;
        struct iio_dev *indio_dev;
+       unsigned int exca_en, excb_en;
        unsigned char regval = 0;
        int ret = 0;
 
@@ -703,26 +705,27 @@ 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;
-               }
+       ret = of_property_read_u32(np, "adi,exca-output", &exca_en);
+       if (!ret && exca_en) {
+               if (exca_en == 1)
+                       regval |= AD7746_EXCSETUP_EXCA;
+               else
+                       regval |= AD7746_EXCSETUP_NEXCA;
+       }
 
-               if (pdata->excb_en) {
-                       if (pdata->excb_inv_en)
-                               regval |= AD7746_EXCSETUP_NEXCB;
-                       else
-                               regval |= AD7746_EXCSETUP_EXCB;
-               }
+       ret = of_property_read_u32(np, "adi,excb-output", &excb_en);
+       if (!ret && excb_en) {
+               if (excb_en == 1)
+                       regval |= AD7746_EXCSETUP_EXCB;
+               else
+                       regval |= AD7746_EXCSETUP_NEXCB;
+       }
 
+       if (pdata) {
                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);
+               regval = AD7746_EXCSETUP_EXCLVL(3);
        }
 
        ret = i2c_smbus_write_byte_data(chip->client,
diff --git a/drivers/staging/iio/cdc/ad7746.h b/drivers/staging/iio/cdc/ad7746.h
index 8bdbd732dbbd..6cae4ecf779e 100644
--- a/drivers/staging/iio/cdc/ad7746.h
+++ b/drivers/staging/iio/cdc/ad7746.h
@@ -19,10 +19,6 @@
 
 struct ad7746_platform_data {
        unsigned char exclvl;   /*Excitation Voltage Level */
-       bool exca_en;           /* enables EXCA pin as the excitation output */
-       bool exca_inv_en;       /* enables /EXCA pin as the excitation output */
-       bool excb_en;           /* enables EXCB pin as the excitation output */
-       bool excb_inv_en;       /* enables /EXCB pin as the excitation output */
 };
 
 #endif /* IIO_CDC_AD7746_H_ */
-- 
2.31.1