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authorUrs Fässler <urs.fassler@bytesatwork.ch>2015-05-18 15:22:44 +0200
committerJonathan Cameron <jic23@kernel.org>2015-05-23 12:42:43 +0100
commit2a67dfba7fae36af0233452d19b40594f62bc019 (patch)
treedec6b94e38d502d863bff7fbef4d9548e6cd88cf /drivers/iio
parent1ce87f21edf6a071a7cc6bc77d628d7c7650d0d8 (diff)
iio:adc128s052: add support for adc122s021
Signed-off-by: Urs Fässler <urs.fassler@bytesatwork.ch> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio')
-rw-r--r--drivers/iio/adc/Kconfig4
-rw-r--r--drivers/iio/adc/ti-adc128s052.c30
2 files changed, 26 insertions, 8 deletions
diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
index cee50de76fb1..7c5565891cb8 100644
--- a/drivers/iio/adc/Kconfig
+++ b/drivers/iio/adc/Kconfig
@@ -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.
diff --git a/drivers/iio/adc/ti-adc128s052.c b/drivers/iio/adc/ti-adc128s052.c
index 655cb564ec54..915be6b60097 100644
--- a/drivers/iio/adc/ti-adc128s052.c
+++ b/drivers/iio/adc/ti-adc128s052.c
@@ -1,9 +1,10 @@
/*
* 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);