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iio: adc: ad4080: add support for AD4084

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Add support for AD4084 16-bit SAR ADC. The AD4084 differs from
AD4080 in resolution (16-bit vs 20-bit) and LVDS CNV clock count
maximum (2 vs 7).

Changes:
- Add AD4084_CHIP_ID definition (0x0054)
- Create ad4084_channel with 16-bit resolution and storage
- Add ad4084_chip_info with appropriate configuration
- Register AD4084 in device ID and OF match tables

Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Antoniu Miclaus
2025-10-07 11:15:23 +00:00
committed by Jonathan Cameron
parent 1b86053ba6
commit 6c3e726573
1 changed files with 15 additions and 0 deletions
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15
drivers/iio/adc/ad4080.c
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@@ -126,6 +126,7 @@
/* Miscellaneous Definitions */
#define AD4080_SPI_READ BIT(7)
#define AD4080_CHIP_ID 0x0050
#define AD4084_CHIP_ID 0x0054
#define AD4080_LVDS_CNV_CLK_CNT_MAX 7
@@ -435,6 +436,8 @@ static struct iio_chan_spec_ext_info ad4080_ext_info[] = {
static const struct iio_chan_spec ad4080_channel = AD4080_CHANNEL_DEFINE(20, 32);
static const struct iio_chan_spec ad4084_channel = AD4080_CHANNEL_DEFINE(16, 16);
static const struct ad4080_chip_info ad4080_chip_info = {
.name = "ad4080",
.product_id = AD4080_CHIP_ID,
@@ -445,6 +448,16 @@ static const struct ad4080_chip_info ad4080_chip_info = {
.lvds_cnv_clk_cnt_max = AD4080_LVDS_CNV_CLK_CNT_MAX,
};
static const struct ad4080_chip_info ad4084_chip_info = {
.name = "ad4084",
.product_id = AD4084_CHIP_ID,
.scale_table = ad4080_scale_table,
.num_scales = ARRAY_SIZE(ad4080_scale_table),
.num_channels = 1,
.channels = &ad4084_channel,
.lvds_cnv_clk_cnt_max = 2,
};
static int ad4080_setup(struct iio_dev *indio_dev)
{
struct ad4080_state *st = iio_priv(indio_dev);
@@ -600,12 +613,14 @@ static int ad4080_probe(struct spi_device *spi)
static const struct spi_device_id ad4080_id[] = {
{ "ad4080", (kernel_ulong_t)&ad4080_chip_info },
{ "ad4084", (kernel_ulong_t)&ad4084_chip_info },
{ }
};
MODULE_DEVICE_TABLE(spi, ad4080_id);
static const struct of_device_id ad4080_of_match[] = {
{ .compatible = "adi,ad4080", &ad4080_chip_info },
{ .compatible = "adi,ad4084", &ad4084_chip_info },
{ }
};
MODULE_DEVICE_TABLE(of, ad4080_of_match);