Add support for ad7380/1/2/3-4 parts which are 4 channels variants from ad7380/1/2/3 Signed-off-by: Julien Stephan <jstephan@xxxxxxxxxxxx> --- drivers/iio/adc/ad7380.c | 77 ++++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 75 insertions(+), 2 deletions(-) diff --git a/drivers/iio/adc/ad7380.c b/drivers/iio/adc/ad7380.c index 790d08c90ad0..6b0b1b0be363 100644 --- a/drivers/iio/adc/ad7380.c +++ b/drivers/iio/adc/ad7380.c @@ -8,6 +8,9 @@ * Datasheets of supported parts: * ad7380/1 : https://www.analog.com/media/en/technical-documentation/data-sheets/AD7380-7381.pdf * ad7383/4 : https://www.analog.com/media/en/technical-documentation/data-sheets/ad7383-7384.pdf + * ad7380-4 : https://www.analog.com/media/en/technical-documentation/data-sheets/ad7380-4.pdf + * ad7381-4 : https://www.analog.com/media/en/technical-documentation/data-sheets/ad7381-4.pdf + * ad7383/4-4 : https://www.analog.com/media/en/technical-documentation/data-sheets/ad7383-4-ad7384-4.pdf */ #include <linux/bitfield.h> @@ -27,7 +30,7 @@ #include <linux/iio/trigger_consumer.h> #include <linux/iio/triggered_buffer.h> -#define MAX_NUM_CHANNELS 2 +#define MAX_NUM_CHANNELS 4 /* 2.5V internal reference voltage */ #define AD7380_INTERNAL_REF_MV 2500 @@ -104,27 +107,53 @@ static const struct iio_chan_spec name[] = { \ IIO_CHAN_SOFT_TIMESTAMP(2), \ } +#define DEFINE_AD7380_4_CHANNEL(name, bits, diff) \ +static const struct iio_chan_spec name[] = { \ + AD7380_CHANNEL(0, bits, diff), \ + AD7380_CHANNEL(1, bits, diff), \ + AD7380_CHANNEL(2, bits, diff), \ + AD7380_CHANNEL(3, bits, diff), \ + IIO_CHAN_SOFT_TIMESTAMP(4), \ +} + /* fully differential */ DEFINE_AD7380_2_CHANNEL(ad7380_channels, 16, 1); DEFINE_AD7380_2_CHANNEL(ad7381_channels, 14, 1); +DEFINE_AD7380_4_CHANNEL(ad7380_4_channels, 16, 1); +DEFINE_AD7380_4_CHANNEL(ad7381_4_channels, 14, 1); /* pseudo differential */ DEFINE_AD7380_2_CHANNEL(ad7383_channels, 16, 0); DEFINE_AD7380_2_CHANNEL(ad7384_channels, 14, 0); +DEFINE_AD7380_4_CHANNEL(ad7383_4_channels, 16, 0); +DEFINE_AD7380_4_CHANNEL(ad7384_4_channels, 14, 0); static const char * const ad7380_2_channel_vcm_supplies[] = { "aina", "ainb", }; +static const char * const ad7380_4_channel_vcm_supplies[] = { + "aina", "ainb", "ainc", "aind", +}; + /* Since this is simultaneous sampling, we don't allow individual channels. */ static const unsigned long ad7380_2_channel_scan_masks[] = { GENMASK(1, 0), 0 }; +static const unsigned long ad7380_4_channel_scan_masks[] = { + GENMASK(3, 0), + 0 +}; + static const struct ad7380_timing_specs ad7380_timing = { .t_csh_ns = 10, }; +static const struct ad7380_timing_specs ad7380_4_timing = { + .t_csh_ns = 20, +}; + static const struct ad7380_chip_info ad7380_chip_info = { .name = "ad7380", .channels = ad7380_channels, @@ -161,6 +190,42 @@ static const struct ad7380_chip_info ad7384_chip_info = { .timing_specs = &ad7380_timing, }; +static const struct ad7380_chip_info ad7380_4_chip_info = { + .name = "ad7380-4", + .channels = ad7380_4_channels, + .num_channels = ARRAY_SIZE(ad7380_4_channels), + .available_scan_masks = ad7380_4_channel_scan_masks, + .timing_specs = &ad7380_4_timing, +}; + +static const struct ad7380_chip_info ad7381_4_chip_info = { + .name = "ad7381-4", + .channels = ad7381_4_channels, + .num_channels = ARRAY_SIZE(ad7381_4_channels), + .available_scan_masks = ad7380_4_channel_scan_masks, + .timing_specs = &ad7380_4_timing, +}; + +static const struct ad7380_chip_info ad7383_4_chip_info = { + .name = "ad7383-4", + .channels = ad7383_4_channels, + .num_channels = ARRAY_SIZE(ad7383_4_channels), + .vcm_supplies = ad7380_4_channel_vcm_supplies, + .num_vcm_supplies = ARRAY_SIZE(ad7380_4_channel_vcm_supplies), + .available_scan_masks = ad7380_4_channel_scan_masks, + .timing_specs = &ad7380_4_timing, +}; + +static const struct ad7380_chip_info ad7384_4_chip_info = { + .name = "ad7384-4", + .channels = ad7384_4_channels, + .num_channels = ARRAY_SIZE(ad7384_4_channels), + .vcm_supplies = ad7380_4_channel_vcm_supplies, + .num_vcm_supplies = ARRAY_SIZE(ad7380_4_channel_vcm_supplies), + .available_scan_masks = ad7380_4_channel_scan_masks, + .timing_specs = &ad7380_4_timing, +}; + struct ad7380_state { const struct ad7380_chip_info *chip_info; struct spi_device *spi; @@ -172,7 +237,7 @@ struct ad7380_state { * transfer buffers to live in their own cache lines. * Make the buffer large enough for MAX_NUM_CHANNELS 16-bit samples and one 64-bit * aligned 64 bit timestamp. - * As MAX_NUM_CHANNELS is 2 the layout of the structure is the same for all parts + * As MAX_NUM_CHANNELS is 4 the layout of the structure is the same for all parts */ struct { u16 raw[MAX_NUM_CHANNELS]; @@ -512,6 +577,10 @@ static const struct of_device_id ad7380_of_match_table[] = { { .compatible = "adi,ad7381", .data = &ad7381_chip_info }, { .compatible = "adi,ad7383", .data = &ad7383_chip_info }, { .compatible = "adi,ad7384", .data = &ad7384_chip_info }, + { .compatible = "adi,ad7380-4", .data = &ad7380_4_chip_info }, + { .compatible = "adi,ad7381-4", .data = &ad7381_4_chip_info }, + { .compatible = "adi,ad7383-4", .data = &ad7383_4_chip_info }, + { .compatible = "adi,ad7384-4", .data = &ad7384_4_chip_info }, { } }; @@ -520,6 +589,10 @@ static const struct spi_device_id ad7380_id_table[] = { { "ad7381", (kernel_ulong_t)&ad7381_chip_info }, { "ad7383", (kernel_ulong_t)&ad7383_chip_info }, { "ad7384", (kernel_ulong_t)&ad7384_chip_info }, + { "ad7380-4", (kernel_ulong_t)&ad7380_4_chip_info }, + { "ad7381-4", (kernel_ulong_t)&ad7381_4_chip_info }, + { "ad7383-4", (kernel_ulong_t)&ad7383_4_chip_info }, + { "ad7384-4", (kernel_ulong_t)&ad7384_4_chip_info }, { } }; MODULE_DEVICE_TABLE(spi, ad7380_id_table); -- 2.44.0
