iio: dac: ad5449: drop support for platform data

There are no longer any users of the platform data struct. Remove
support for it from the driver.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Link: https://patch.msgid.link/20240814092629.9862-1-brgl@bgdev.pl
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Author: Bartosz Golaszewski

drivers/iio/dac/ad5449.c

@@ -20,8 +20,6 @@
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
 
-#include <linux/platform_data/ad5449.h>
-
 #define AD5449_MAX_CHANNELS		2
 #define AD5449_MAX_VREFS		2
 
@@ -268,7 +266,6 @@ static const char *ad5449_vref_name(struct ad5449 *st, int n)
 
 static int ad5449_spi_probe(struct spi_device *spi)
 {
-	struct ad5449_platform_data *pdata = spi->dev.platform_data;
 	const struct spi_device_id *id = spi_get_device_id(spi);
 	struct iio_dev *indio_dev;
 	struct ad5449 *st;
@@ -306,16 +303,8 @@ static int ad5449_spi_probe(struct spi_device *spi)
 	mutex_init(&st->lock);
 
 	if (st->chip_info->has_ctrl) {
-		unsigned int ctrl = 0x00;
-		if (pdata) {
-			if (pdata->hardware_clear_to_midscale)
-				ctrl |= AD5449_CTRL_HCLR_TO_MIDSCALE;
-			ctrl |= pdata->sdo_mode << AD5449_CTRL_SDO_OFFSET;
-			st->has_sdo = pdata->sdo_mode != AD5449_SDO_DISABLED;
-		} else {
-			st->has_sdo = true;
-		}
-		ad5449_write(indio_dev, AD5449_CMD_CTRL, ctrl);
+		st->has_sdo = true;
+		ad5449_write(indio_dev, AD5449_CMD_CTRL, 0x0);
 	}
 
 	ret = iio_device_register(indio_dev);