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Commit 2a67dfba authored by Urs Fässler's avatar Urs Fässler Committed by Jonathan Cameron
Browse files

iio:adc128s052: add support for adc122s021 



Signed-off-by: default avatarUrs Fässler <urs.fassler@bytesatwork.ch>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent 1ce87f21

Documentation/devicetree/bindings/iio/adc/ti-adc128s052.txt

+2 −2
Original line number Diff line number Diff line 
* Texas Instruments' ADC128S052 ADC chip

* Texas Instruments' ADC128S052 and ADC122S021 ADC chip



Required properties:

 - compatible: Should be "ti,adc128s052"

 - compatible: Should be "ti,adc128s052" or "ti,adc122s021"

 - reg: spi chip select number for the device

 - vref-supply: The regulator supply for ADC reference voltage

drivers/iio/adc/Kconfig

+2 −2
Original line number Diff line number Diff line
@@ -292,11 +292,11 @@ config TI_ADC081C 
	  called ti-adc081c.



config TI_ADC128S052

	tristate "Texas Instruments ADC128S052"

	tristate "Texas Instruments ADC128S052/ADC122S021"

	depends on SPI

	help

	  If you say yes here you get support for Texas Instruments ADC128S052

	  chip.

	  and ADC122S021 chips.



	  This driver can also be built as a module. If so, the module will be

	  called ti-adc128s052.

drivers/iio/adc/ti-adc128s052.c

+24 −6
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2014 Angelo Compagnucci <angelo.compagnucci@gmail.com>

 *

 * Driver for Texas Instruments' ADC128S052 ADC chip.

 * Datasheet can be found here:

 * Driver for Texas Instruments' ADC128S052 and ADC122S021 ADC chip.

 * Datasheets can be found here:

 * http://www.ti.com/lit/ds/symlink/adc128s052.pdf

 * http://www.ti.com/lit/ds/symlink/adc122s021.pdf

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as
@@ -16,6 +17,11 @@ 
#include <linux/iio/iio.h>

#include <linux/regulator/consumer.h>



struct adc128_configuration {

	const struct iio_chan_spec	*channels;

	u8				num_channels;

};



struct adc128 {

	struct spi_device *spi;
@@ -92,7 +98,7 @@ static int adc128_read_raw(struct iio_dev *indio_dev, 
		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) \

	}



static const struct iio_chan_spec adc128_channels[] = {

static const struct iio_chan_spec adc128s052_channels[] = {

	ADC128_VOLTAGE_CHANNEL(0),

	ADC128_VOLTAGE_CHANNEL(1),

	ADC128_VOLTAGE_CHANNEL(2),
@@ -103,6 +109,16 @@ static const struct iio_chan_spec adc128_channels[] = { 
	ADC128_VOLTAGE_CHANNEL(7),

};



static const struct iio_chan_spec adc122s021_channels[] = {

	ADC128_VOLTAGE_CHANNEL(0),

	ADC128_VOLTAGE_CHANNEL(1),

};



static const struct adc128_configuration adc128_config[] = {

	{ adc128s052_channels, ARRAY_SIZE(adc128s052_channels) },

	{ adc122s021_channels, ARRAY_SIZE(adc122s021_channels) },

};



static const struct iio_info adc128_info = {

	.read_raw = adc128_read_raw,

	.driver_module = THIS_MODULE,
@@ -112,6 +128,7 @@ static int adc128_probe(struct spi_device *spi) 
{

	struct iio_dev *indio_dev;

	struct adc128 *adc;

	int config = spi_get_device_id(spi)->driver_data;

	int ret;



	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*adc));
@@ -128,8 +145,8 @@ static int adc128_probe(struct spi_device *spi) 
	indio_dev->modes = INDIO_DIRECT_MODE;

	indio_dev->info = &adc128_info;



	indio_dev->channels = adc128_channels;

	indio_dev->num_channels = ARRAY_SIZE(adc128_channels);

	indio_dev->channels = adc128_config[config].channels;

	indio_dev->num_channels = adc128_config[config].num_channels;



	adc->reg = devm_regulator_get(&spi->dev, "vref");

	if (IS_ERR(adc->reg))
@@ -158,7 +175,8 @@ static int adc128_remove(struct spi_device *spi) 
}



static const struct spi_device_id adc128_id[] = {

	{ "adc128s052", 0},

	{ "adc128s052", 0},	/* index into adc128_config */

	{ "adc122s021",	1},

	{ }

};

MODULE_DEVICE_TABLE(spi, adc128_id);