[PATCH v6 4/6] iio: dac: ad5504: remove legacy platform data support

The AD5504 driver has no in-tree users of its legacy platform data
support. Now that ACPI has its own explicit path, non-ACPI systems can
safely treat the vcc regulator as mandatory.

Drop the ad5504_platform_data structure, remove the fallback logic
from probe, and delete include/linux/iio/dac/ad5504.h.

Signed-off-by: Taha Ed-Dafili <[email protected]>
---
 drivers/iio/dac/ad5504.c       | 17 +++++------------
 include/linux/iio/dac/ad5504.h | 15 ---------------
 2 files changed, 5 insertions(+), 27 deletions(-)
 delete mode 100644 include/linux/iio/dac/ad5504.h

diff --git a/drivers/iio/dac/ad5504.c b/drivers/iio/dac/ad5504.c
index 6f70c57c7a82..799726eafdf2 100644
--- a/drivers/iio/dac/ad5504.c
+++ b/drivers/iio/dac/ad5504.c
@@ -20,7 +20,6 @@
 #include <linux/types.h>
 #include <linux/units.h>
 
-#include <linux/iio/dac/ad5504.h>
 #include <linux/iio/events.h>
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
@@ -281,7 +280,6 @@ static const struct iio_chan_spec ad5504_channels[] = {
 static int ad5504_probe(struct spi_device *spi)
 {
 	struct device *dev = &spi->dev;
-	const struct ad5504_platform_data *pdata = dev_get_platdata(dev);
 	struct iio_dev *indio_dev;
 	struct ad5504_state *st;
 	int ret;
@@ -296,16 +294,11 @@ static int ad5504_probe(struct spi_device *spi)
 		st->vref_mv = AD5504_VREF_ACPI_DEFAULT_mV;
 	} else {
 		ret = devm_regulator_get_enable_read_voltage(dev, "vcc");
-		if (ret < 0 && ret != -ENODEV)
-			return ret;
-		if (ret == -ENODEV) {
-			if (pdata->vref_mv)
-				st->vref_mv = pdata->vref_mv;
-			else
-				dev_warn(dev, "reference voltage unspecified\n");
-		} else {
-			st->vref_mv = ret / 1000;
-		}
+		if (ret < 0)
+			return dev_err_probe(dev, ret,
+					     "Failed to get vcc regulator\n");
+
+		st->vref_mv = ret / 1000;
 	}
 
 	st->spi = spi;
diff --git a/include/linux/iio/dac/ad5504.h b/include/linux/iio/dac/ad5504.h
deleted file mode 100644
index 9f23c90486ee..000000000000
--- a/include/linux/iio/dac/ad5504.h
+++ /dev/null
@@ -1,15 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * AD5504 SPI DAC driver
- *
- * Copyright 2011 Analog Devices Inc.
- */
-
-#ifndef SPI_AD5504_H_
-#define SPI_AD5504_H_
-
-struct ad5504_platform_data {
-	u16				vref_mv;
-};
-
-#endif /* SPI_AD5504_H_ */
-- 
2.55.0