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staging:iio:ad7780: Remove the ad7780_platform_data 

The ad7780_platform_data contains just the reference voltage information.
Since the preferred way of specifying this information is using the Linux
regulator framework and the ad7780 platform_data is not used by other
users, it can be completely removed.

Signed-off-by: Dragos Bogdan <dragos.bogdan@analog.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Dragos Bogdan 2015-11-18 16:16:34 +02:00 committed by Jonathan Cameron
parent cef7e12585
commit 8ffedc1b12
2 changed files with 2 additions and 36 deletions
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9
drivers/staging/iio/adc/ad7780.c
View File

@ -22,8 +22,6 @@
#include <linux/iio/sysfs.h>
#include <linux/iio/adc/ad_sigma_delta.h>
#include "ad7780.h"
#define AD7780_RDY BIT(7)
#define AD7780_FILTER BIT(6)
#define AD7780_ERR BIT(5)
@ -162,7 +160,6 @@ static const struct iio_info ad7780_info = {
static int ad7780_probe(struct spi_device *spi)
{
struct ad7780_platform_data *pdata = spi->dev.platform_data;
struct ad7780_state *st;
struct iio_dev *indio_dev;
int ret, voltage_uv = 0;
@ -188,12 +185,10 @@ static int ad7780_probe(struct spi_device *spi)
st->chip_info =
&ad7780_chip_info_tbl[spi_get_device_id(spi)->driver_data];
if (pdata && pdata->vref_mv)
st->int_vref_mv = pdata->vref_mv;
else if (voltage_uv)
if (voltage_uv)
st->int_vref_mv = voltage_uv / 1000;
else
dev_warn(&spi->dev, "reference voltage unspecified\n");
dev_warn(&spi->dev, "Reference voltage unspecified\n");
spi_set_drvdata(spi, indio_dev);

29
drivers/staging/iio/adc/ad7780.h
View File

@ -1,29 +0,0 @@
/*
* AD7780/AD7781 SPI ADC driver
*
* Copyright 2011 Analog Devices Inc.
*
* Licensed under the GPL-2.
*/
#ifndef IIO_ADC_AD7780_H_
#define IIO_ADC_AD7780_H_
/*
* TODO: struct ad7780_platform_data needs to go into include/linux/iio
*/
/* NOTE:
* The AD7780 doesn't feature a dedicated SPI chip select, in addition it
* features a dual use data out ready DOUT/RDY output.
* In order to avoid contentions on the SPI bus, it's therefore necessary
* to use spi bus locking combined with a dedicated GPIO to control the
* power down reset signal of the AD7780.
*
* The DOUT/RDY output must also be wired to an interrupt capable GPIO.
*/
struct ad7780_platform_data {
u16 vref_mv;
};
#endif /* IIO_ADC_AD7780_H_ */