* [PATCH 1/2] dt-bindings: iio: adc: ad4080: add AD4885 support
2026-09-07 10:19 [PATCH 0/2] iio: adc: ad4080: add support for AD4885 Antoniu Miclaus
@ 2026-09-07 10:19 ` Antoniu Miclaus
2026-09-07 10:28 ` sashiko-bot
2026-09-07 10:19 ` [PATCH 2/2] iio: adc: ad4080: add support for AD4885 Antoniu Miclaus
1 sibling, 1 reply; 4+ messages in thread
From: Antoniu Miclaus @ 2026-09-07 10:19 UTC (permalink / raw)
To: Antoniu Miclaus, Nuno Sá, Michael Hennerich,
Jonathan Cameron, David Lechner, Rob Herring, Krzysztof Kozlowski,
Conor Dooley, linux-iio, linux, devicetree, linux-kernel
Add AD4885 compatible string to the AD4080 devicetree binding.
The AD4885 is a dual-channel, 16-bit, 10 MSPS SAR ADC, sharing the same
register map and interface as the AD4080 family. Like the AD4884, it
requires two SPI chip selects and two io-backends for its independent
ADC channels. The AD4885 is the dual-channel variant of the AD4085 and
differs from the AD4884 in its maximum throughput and LVDS conversion
clock count, which requires distinct chip configuration in the driver,
precluding a fallback compatible.
Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
---
Documentation/devicetree/bindings/iio/adc/adi,ad4080.yaml | 2 ++
1 file changed, 2 insertions(+)
diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad4080.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad4080.yaml
index db8467b98e67..07ac4e07f415 100644
--- a/Documentation/devicetree/bindings/iio/adc/adi,ad4080.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/adi,ad4080.yaml
@@ -41,6 +41,7 @@ properties:
- adi,ad4880
- adi,ad4883
- adi,ad4884
+ - adi,ad4885
reg:
minItems: 1
@@ -105,6 +106,7 @@ allOf:
- adi,ad4880
- adi,ad4883
- adi,ad4884
+ - adi,ad4885
then:
properties:
reg:
--
2.43.0
^ permalink raw reply related [flat|nested] 4+ messages in thread* [PATCH 2/2] iio: adc: ad4080: add support for AD4885
2026-09-07 10:19 [PATCH 0/2] iio: adc: ad4080: add support for AD4885 Antoniu Miclaus
2026-09-07 10:19 ` [PATCH 1/2] dt-bindings: iio: adc: ad4080: add AD4885 support Antoniu Miclaus
@ 2026-09-07 10:19 ` Antoniu Miclaus
1 sibling, 0 replies; 4+ messages in thread
From: Antoniu Miclaus @ 2026-09-07 10:19 UTC (permalink / raw)
To: Antoniu Miclaus, Nuno Sá, Michael Hennerich,
Jonathan Cameron, David Lechner, Rob Herring, Krzysztof Kozlowski,
Conor Dooley, linux-iio, linux, devicetree, linux-kernel
Add support for the AD4885, a dual-channel, 16-bit, 10 MSPS SAR ADC.
The AD4885 is the dual-channel variant of the AD4085, sharing the same
register map and SPI interface as the rest of the AD4080 family. Like
the AD4884, it uses two independent ADC channels, each with its own SPI
configuration interface, but it runs at a lower maximum throughput and
therefore uses the same maximum LVDS conversion clock count as the
AD4085.
Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
---
drivers/iio/adc/ad4080.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/drivers/iio/adc/ad4080.c b/drivers/iio/adc/ad4080.c
index 994625a7cf8b..4843ecdd91a8 100644
--- a/drivers/iio/adc/ad4080.c
+++ b/drivers/iio/adc/ad4080.c
@@ -137,6 +137,7 @@
#define AD4880_CHIP_ID 0x0059
#define AD4883_CHIP_ID 0x005B
#define AD4884_CHIP_ID 0x005C
+#define AD4885_CHIP_ID 0x005D
#define AD4080_MAX_CHANNELS 2
@@ -561,6 +562,11 @@ static const struct iio_chan_spec ad4884_channels[] = {
AD4880_CHANNEL_DEFINE(16, 16, 1),
};
+static const struct iio_chan_spec ad4885_channels[] = {
+ AD4880_CHANNEL_DEFINE(16, 16, 0),
+ AD4880_CHANNEL_DEFINE(16, 16, 1),
+};
+
static const struct ad4080_chip_info ad4080_chip_info = {
.name = "ad4080",
.product_id = AD4080_CHIP_ID,
@@ -681,6 +687,16 @@ static const struct ad4080_chip_info ad4884_chip_info = {
.lvds_cnv_clk_cnt_max = 2,
};
+static const struct ad4080_chip_info ad4885_chip_info = {
+ .name = "ad4885",
+ .product_id = AD4885_CHIP_ID,
+ .scale_table = ad4080_scale_table,
+ .num_scales = ARRAY_SIZE(ad4080_scale_table),
+ .num_channels = 2,
+ .channels = ad4885_channels,
+ .lvds_cnv_clk_cnt_max = 8,
+};
+
static int ad4080_setup_channel(struct ad4080_state *st, unsigned int ch)
{
struct device *dev = regmap_get_device(st->regmap[ch]);
@@ -890,6 +906,7 @@ static const struct spi_device_id ad4080_id[] = {
{ .name = "ad4880", .driver_data = (kernel_ulong_t)&ad4880_chip_info },
{ .name = "ad4883", .driver_data = (kernel_ulong_t)&ad4883_chip_info },
{ .name = "ad4884", .driver_data = (kernel_ulong_t)&ad4884_chip_info },
+ { .name = "ad4885", .driver_data = (kernel_ulong_t)&ad4885_chip_info },
{ }
};
MODULE_DEVICE_TABLE(spi, ad4080_id);
@@ -907,6 +924,7 @@ static const struct of_device_id ad4080_of_match[] = {
{ .compatible = "adi,ad4880", &ad4880_chip_info },
{ .compatible = "adi,ad4883", &ad4883_chip_info },
{ .compatible = "adi,ad4884", &ad4884_chip_info },
+ { .compatible = "adi,ad4885", &ad4885_chip_info },
{ }
};
MODULE_DEVICE_TABLE(of, ad4080_of_match);
--
2.43.0
^ permalink raw reply related [flat|nested] 4+ messages in thread