Commit fa087f5b authored by Jonathan Santos's avatar Jonathan Santos Committed by Jonathan Cameron
Browse files

iio: adc: ad7768-1: introduce chip info for future multidevice support 



Add Chip info struct in SPI device to store channel information for
each supported part.

Signed-off-by: default avatarJonathan Santos <Jonathan.Santos@analog.com>
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 2f55ae3a

drivers/iio/adc/ad7768-1.c

+41 −23
Original line number Diff line number Diff line
@@ -213,6 +213,12 @@ static const struct iio_scan_type ad7768_scan_type[] = { 
	},

};



struct ad7768_chip_info {

	const char *name;

	const struct iio_chan_spec *channel_spec;

	int num_channels;

};



struct ad7768_state {

	struct spi_device *spi;

	struct regmap *regmap;
@@ -234,6 +240,7 @@ struct ad7768_state { 
	struct gpio_desc *gpio_reset;

	const char *labels[AD7768_MAX_CHANNELS];

	struct gpio_chip gpiochip;

	const struct ad7768_chip_info *chip;

	bool en_spi_sync;

	/*

	 * DMA (thus cache coherency maintenance) may require the
@@ -748,24 +755,28 @@ static const struct iio_chan_spec_ext_info ad7768_ext_info[] = { 
	{ }

};



#define AD7768_CHAN(_idx, _msk_avail) \

{ \

	.type = IIO_VOLTAGE, \

	.info_mask_separate_available = _msk_avail, \

	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \

	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \

				    BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY) | \

				    BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), \

	.info_mask_shared_by_type_available = BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), \

	.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \

	.info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_SAMP_FREQ), \

	.ext_info = ad7768_ext_info, \

	.indexed = 1, \

	.channel = _idx, \

	.scan_index = _idx, \

	.has_ext_scan_type = 1, \

	.ext_scan_type = ad7768_scan_type, \

	.num_ext_scan_type = ARRAY_SIZE(ad7768_scan_type), \

}



static const struct iio_chan_spec ad7768_channels[] = {

	{

		.type = IIO_VOLTAGE,

		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),

		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |

					    BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY) |

					    BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO),

		.info_mask_shared_by_type_available = BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO),

		.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),

		.info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_SAMP_FREQ),

		.ext_info = ad7768_ext_info,

		.indexed = 1,

		.channel = 0,

		.scan_index = 0,

		.has_ext_scan_type = 1,

		.ext_scan_type = ad7768_scan_type,

		.num_ext_scan_type = ARRAY_SIZE(ad7768_scan_type),

	},

	AD7768_CHAN(0, 0),

};



static int ad7768_read_raw(struct iio_dev *indio_dev,
@@ -1321,6 +1332,12 @@ static int ad7768_register_regulators(struct device *dev, struct ad7768_state *s 
	return 0;

}



static const struct ad7768_chip_info ad7768_chip_info = {

	.name = "ad7768-1",

	.channel_spec = ad7768_channels,

	.num_channels = ARRAY_SIZE(ad7768_channels),

};



static int ad7768_probe(struct spi_device *spi)

{

	struct ad7768_state *st;
@@ -1347,6 +1364,7 @@ static int ad7768_probe(struct spi_device *spi) 
			return ret;

	}



	st->chip = spi_get_device_match_data(spi);

	st->spi = spi;



	st->regmap = devm_regmap_init_spi(spi, &ad7768_regmap_config);
@@ -1371,9 +1389,9 @@ static int ad7768_probe(struct spi_device *spi) 


	st->mclk_freq = clk_get_rate(st->mclk);



	indio_dev->channels = ad7768_channels;

	indio_dev->num_channels = ARRAY_SIZE(ad7768_channels);

	indio_dev->name = spi_get_device_id(spi)->name;

	indio_dev->channels = st->chip->channel_spec;

	indio_dev->num_channels = st->chip->num_channels;

	indio_dev->name = st->chip->name;

	indio_dev->info = &ad7768_info;

	indio_dev->modes = INDIO_DIRECT_MODE;
@@ -1390,7 +1408,7 @@ static int ad7768_probe(struct spi_device *spi) 


	init_completion(&st->completion);



	ret = ad7768_set_channel_label(indio_dev, ARRAY_SIZE(ad7768_channels));

	ret = ad7768_set_channel_label(indio_dev, st->chip->num_channels);

	if (ret)

		return ret;
@@ -1409,13 +1427,13 @@ static int ad7768_probe(struct spi_device *spi) 
}



static const struct spi_device_id ad7768_id_table[] = {

	{ "ad7768-1", 0 },

	{ "ad7768-1", (kernel_ulong_t)&ad7768_chip_info },

	{ }

};

MODULE_DEVICE_TABLE(spi, ad7768_id_table);



static const struct of_device_id ad7768_of_match[] = {

	{ .compatible = "adi,ad7768-1" },

	{ .compatible = "adi,ad7768-1", .data = &ad7768_chip_info },

	{ }

};

MODULE_DEVICE_TABLE(of, ad7768_of_match);