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iio: adc: ad7923: Add support for the ad7908/ad7918/ad7928

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The ad7928 is software compatible with the ad7923.
The ad7908 and ad7918 are the 8 and 10-bit versions of the ad7928.

Signed-off-by: Daniel Junho <djunho@gmail.com>
Reviewed-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Daniel Junho 2019-12-17 08:11:58 -03:00 committed by Jonathan Cameron
parent 233e7de42f
commit 851644a60d
1 changed files with 44 additions and 4 deletions
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48
drivers/iio/adc/ad7923.c
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@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* AD7904/AD7914/AD7923/AD7924 SPI ADC driver
* AD7904/AD7914/AD7923/AD7924/AD7908/AD7918/AD7928 SPI ADC driver
*
* Copyright 2011 Analog Devices Inc (from AD7923 Driver)
* Copyright 2012 CS Systemes d'Information
@ -33,7 +33,6 @@
#define AD7923_SEQUENCE_PROTECT (2) /* no interrupt write cycle */
#define AD7923_SEQUENCE_ON (3) /* continuous sequence */
#define AD7923_MAX_CHAN 4
#define AD7923_PM_MODE_WRITE(mode) ((mode) << 4) /* write mode */
#define AD7923_CHANNEL_WRITE(channel) ((channel) << 6) /* write channel */
@ -74,6 +73,9 @@ enum ad7923_id {
AD7904,
AD7914,
AD7924,
AD7908,
AD7918,
AD7928
};
#define AD7923_V_CHAN(index, bits) \
@ -102,9 +104,25 @@ const struct iio_chan_spec name ## _channels[] = { \
IIO_CHAN_SOFT_TIMESTAMP(4), \
}
#define DECLARE_AD7908_CHANNELS(name, bits) \
const struct iio_chan_spec name ## _channels[] = { \
AD7923_V_CHAN(0, bits), \
AD7923_V_CHAN(1, bits), \
AD7923_V_CHAN(2, bits), \
AD7923_V_CHAN(3, bits), \
AD7923_V_CHAN(4, bits), \
AD7923_V_CHAN(5, bits), \
AD7923_V_CHAN(6, bits), \
AD7923_V_CHAN(7, bits), \
IIO_CHAN_SOFT_TIMESTAMP(8), \
}
static DECLARE_AD7923_CHANNELS(ad7904, 8);
static DECLARE_AD7923_CHANNELS(ad7914, 10);
static DECLARE_AD7923_CHANNELS(ad7924, 12);
static DECLARE_AD7908_CHANNELS(ad7908, 8);
static DECLARE_AD7908_CHANNELS(ad7918, 10);
static DECLARE_AD7908_CHANNELS(ad7928, 12);
static const struct ad7923_chip_info ad7923_chip_info[] = {
[AD7904] = {
@ -119,6 +137,18 @@ static const struct ad7923_chip_info ad7923_chip_info[] = {
.channels = ad7924_channels,
.num_channels = ARRAY_SIZE(ad7924_channels),
},
[AD7908] = {
.channels = ad7908_channels,
.num_channels = ARRAY_SIZE(ad7908_channels),
},
[AD7918] = {
.channels = ad7918_channels,
.num_channels = ARRAY_SIZE(ad7918_channels),
},
[AD7928] = {
.channels = ad7928_channels,
.num_channels = ARRAY_SIZE(ad7928_channels),
},
};
/**
@ -131,7 +161,11 @@ static int ad7923_update_scan_mode(struct iio_dev *indio_dev,
int i, cmd, len;
len = 0;
for_each_set_bit(i, active_scan_mask, AD7923_MAX_CHAN) {
/*
* For this driver the last channel is always the software timestamp so
* skip that one.
*/
for_each_set_bit(i, active_scan_mask, indio_dev->num_channels - 1) {
cmd = AD7923_WRITE_CR | AD7923_CHANNEL_WRITE(i) |
AD7923_SEQUENCE_WRITE(AD7923_SEQUENCE_OFF) |
st->settings;
@ -344,6 +378,9 @@ static const struct spi_device_id ad7923_id[] = {
{"ad7914", AD7914},
{"ad7923", AD7924},
{"ad7924", AD7924},
{"ad7908", AD7908},
{"ad7918", AD7918},
{"ad7928", AD7928},
{}
};
MODULE_DEVICE_TABLE(spi, ad7923_id);
@ -353,6 +390,9 @@ static const struct of_device_id ad7923_of_match[] = {
{ .compatible = "adi,ad7914", },
{ .compatible = "adi,ad7923", },
{ .compatible = "adi,ad7924", },
{ .compatible = "adi,ad7908", },
{ .compatible = "adi,ad7918", },
{ .compatible = "adi,ad7928", },
{ },
};
MODULE_DEVICE_TABLE(of, ad7923_of_match);
@ -370,5 +410,5 @@ module_spi_driver(ad7923_driver);
MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
MODULE_AUTHOR("Patrick Vasseur <patrick.vasseur@c-s.fr>");
MODULE_DESCRIPTION("Analog Devices AD7904/AD7914/AD7923/AD7924 ADC");
MODULE_DESCRIPTION("Analog Devices AD7923 and similar ADC");
MODULE_LICENSE("GPL v2");