From 851644a60d200c9a294de5a5594004bcf13d34c7 Mon Sep 17 00:00:00 2001 From: Daniel Junho Date: Tue, 17 Dec 2019 08:11:58 -0300 Subject: [PATCH] iio: adc: ad7923: Add support for the ad7908/ad7918/ad7928 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 Reviewed-by: Alexandru Ardelean Signed-off-by: Jonathan Cameron --- drivers/iio/adc/ad7923.c | 48 ++++++++++++++++++++++++++++++++++++++++++++---- 1 file changed, 44 insertions(+), 4 deletions(-) diff --git a/drivers/iio/adc/ad7923.c b/drivers/iio/adc/ad7923.c index 6d56fa0..1d124c8 100644 --- a/drivers/iio/adc/ad7923.c +++ b/drivers/iio/adc/ad7923.c @@ -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 "); MODULE_AUTHOR("Patrick Vasseur "); -MODULE_DESCRIPTION("Analog Devices AD7904/AD7914/AD7923/AD7924 ADC"); +MODULE_DESCRIPTION("Analog Devices AD7923 and similar ADC"); MODULE_LICENSE("GPL v2"); -- 2.7.4