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iio: adc: ad4080: add support for AD4081

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Add support for AD4081 20-bit SAR ADC. The AD4081 has the same
resolution as AD4080 (20-bit) but differs in LVDS CNV clock count
maximum (2 vs 7).

Changes:
- Add AD4081_CHIP_ID definition (0x0051)
- Create ad4081_channel with 20-bit resolution and 32-bit storage
- Add ad4081_chip_info with lvds_cnv_clk_cnt_max = 2
- Register AD4081 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 11:15:25 +00:00
committed by Jonathan Cameron
parent 83185903b4
commit d34ad64672
1 changed files with 15 additions and 0 deletions
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15
drivers/iio/adc/ad4080.c
View File

@@ -126,6 +126,7 @@
/* Miscellaneous Definitions */
#define AD4080_SPI_READ BIT(7)
#define AD4080_CHIP_ID 0x0050
#define AD4081_CHIP_ID 0x0051
#define AD4084_CHIP_ID 0x0054
#define AD4080_LVDS_CNV_CLK_CNT_MAX 7
@@ -436,6 +437,8 @@ 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 ad4081_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 = {
@@ -448,6 +451,16 @@ 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 ad4081_chip_info = {
.name = "ad4081",
.product_id = AD4081_CHIP_ID,
.scale_table = ad4080_scale_table,
.num_scales = ARRAY_SIZE(ad4080_scale_table),
.num_channels = 1,
.channels = &ad4081_channel,
.lvds_cnv_clk_cnt_max = 2,
};
static const struct ad4080_chip_info ad4084_chip_info = {
.name = "ad4084",
.product_id = AD4084_CHIP_ID,
@@ -613,6 +626,7 @@ static int ad4080_probe(struct spi_device *spi)
static const struct spi_device_id ad4080_id[] = {
{ "ad4080", (kernel_ulong_t)&ad4080_chip_info },
{ "ad4081", (kernel_ulong_t)&ad4081_chip_info },
{ "ad4084", (kernel_ulong_t)&ad4084_chip_info },
{ }
};
@@ -620,6 +634,7 @@ MODULE_DEVICE_TABLE(spi, ad4080_id);
static const struct of_device_id ad4080_of_match[] = {
{ .compatible = "adi,ad4080", &ad4080_chip_info },
{ .compatible = "adi,ad4081", &ad4081_chip_info },
{ .compatible = "adi,ad4084", &ad4084_chip_info },
{ }
};