Add support for AD4088 14-bit SAR ADC. The AD4088 has the same
resolution as AD4087 (14-bit) but differs in LVDS CNV clock count
maximum (8 vs 1).

Changes:
- Add AD4088_CHIP_ID definition (0x0058)
- Create ad4088_channel with 14-bit resolution and 16-bit storage
- Add ad4088_chip_info with lvds_cnv_clk_cnt_max = 8
- Register AD4088 in device ID and OF match tables

Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
---
 drivers/iio/adc/ad4080.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/iio/adc/ad4080.c b/drivers/iio/adc/ad4080.c
index 728df626f09e..fc261d3d7687 100644
--- a/drivers/iio/adc/ad4080.c
+++ b/drivers/iio/adc/ad4080.c
@@ -133,6 +133,7 @@
 #define AD4085_CHIP_ID						0x0055
 #define AD4086_CHIP_ID						0x0056
 #define AD4087_CHIP_ID						0x0057
+#define AD4088_CHIP_ID						0x0058
 
 #define AD4080_LVDS_CNV_CLK_CNT_MAX				7
 
@@ -456,6 +457,8 @@ static const struct iio_chan_spec ad4086_channel = AD4080_CHANNEL_DEFINE(14, 16)
 
 static const struct iio_chan_spec ad4087_channel = AD4080_CHANNEL_DEFINE(14, 16);
 
+static const struct iio_chan_spec ad4088_channel = AD4080_CHANNEL_DEFINE(14, 16);
+
 static const struct ad4080_chip_info ad4080_chip_info = {
 	.name = "ad4080",
 	.product_id = AD4080_CHIP_ID,
@@ -536,6 +539,16 @@ static const struct ad4080_chip_info ad4087_chip_info = {
 	.lvds_cnv_clk_cnt_max = 1,
 };
 
+static const struct ad4080_chip_info ad4088_chip_info = {
+	.name = "ad4088",
+	.product_id = AD4088_CHIP_ID,
+	.scale_table = ad4080_scale_table,
+	.num_scales = ARRAY_SIZE(ad4080_scale_table),
+	.num_channels = 1,
+	.channels = &ad4088_channel,
+	.lvds_cnv_clk_cnt_max = 8,
+};
+
 static int ad4080_setup(struct iio_dev *indio_dev)
 {
 	struct ad4080_state *st = iio_priv(indio_dev);
@@ -698,6 +711,7 @@ static const struct spi_device_id ad4080_id[] = {
 	{ "ad4085", (kernel_ulong_t)&ad4085_chip_info },
 	{ "ad4086", (kernel_ulong_t)&ad4086_chip_info },
 	{ "ad4087", (kernel_ulong_t)&ad4087_chip_info },
+	{ "ad4088", (kernel_ulong_t)&ad4088_chip_info },
 	{ }
 };
 MODULE_DEVICE_TABLE(spi, ad4080_id);
@@ -711,6 +725,7 @@ static const struct of_device_id ad4080_of_match[] = {
 	{ .compatible = "adi,ad4085", &ad4085_chip_info },
 	{ .compatible = "adi,ad4086", &ad4086_chip_info },
 	{ .compatible = "adi,ad4087", &ad4087_chip_info },
+	{ .compatible = "adi,ad4088", &ad4088_chip_info },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, ad4080_of_match);
-- 
2.43.0

On Fri, 2026-02-06 at 15:08 +0200, Antoniu Miclaus wrote:
> Add support for AD4088 14-bit SAR ADC. The AD4088 has the same
> resolution as AD4087 (14-bit) but differs in LVDS CNV clock count
> maximum (8 vs 1).
> 
> Changes:
> - Add AD4088_CHIP_ID definition (0x0058)
> - Create ad4088_channel with 14-bit resolution and 16-bit storage
> - Add ad4088_chip_info with lvds_cnv_clk_cnt_max = 8
> - Register AD4088 in device ID and OF match tables
> 
> Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
> ---

Same,

Reviewed-by: Nuno Sá <nuno.sa@analog.com>

>  drivers/iio/adc/ad4080.c | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 
> diff --git a/drivers/iio/adc/ad4080.c b/drivers/iio/adc/ad4080.c
> index 728df626f09e..fc261d3d7687 100644
> --- a/drivers/iio/adc/ad4080.c
> +++ b/drivers/iio/adc/ad4080.c
> @@ -133,6 +133,7 @@
>  #define AD4085_CHIP_ID						0x0055
>  #define AD4086_CHIP_ID						0x0056
>  #define AD4087_CHIP_ID						0x0057
> +#define AD4088_CHIP_ID						0x0058
>  
>  #define AD4080_LVDS_CNV_CLK_CNT_MAX				7
>  
> @@ -456,6 +457,8 @@ static const struct iio_chan_spec ad4086_channel =
> AD4080_CHANNEL_DEFINE(14, 16)
>  
>  static const struct iio_chan_spec ad4087_channel = AD4080_CHANNEL_DEFINE(14, 16);
>  
> +static const struct iio_chan_spec ad4088_channel = AD4080_CHANNEL_DEFINE(14, 16);
> +
>  static const struct ad4080_chip_info ad4080_chip_info = {
>  	.name = "ad4080",
>  	.product_id = AD4080_CHIP_ID,
> @@ -536,6 +539,16 @@ static const struct ad4080_chip_info ad4087_chip_info = {
>  	.lvds_cnv_clk_cnt_max = 1,
>  };
>  
> +static const struct ad4080_chip_info ad4088_chip_info = {
> +	.name = "ad4088",
> +	.product_id = AD4088_CHIP_ID,
> +	.scale_table = ad4080_scale_table,
> +	.num_scales = ARRAY_SIZE(ad4080_scale_table),
> +	.num_channels = 1,
> +	.channels = &ad4088_channel,
> +	.lvds_cnv_clk_cnt_max = 8,
> +};
> +
>  static int ad4080_setup(struct iio_dev *indio_dev)
>  {
>  	struct ad4080_state *st = iio_priv(indio_dev);
> @@ -698,6 +711,7 @@ static const struct spi_device_id ad4080_id[] = {
>  	{ "ad4085", (kernel_ulong_t)&ad4085_chip_info },
>  	{ "ad4086", (kernel_ulong_t)&ad4086_chip_info },
>  	{ "ad4087", (kernel_ulong_t)&ad4087_chip_info },
> +	{ "ad4088", (kernel_ulong_t)&ad4088_chip_info },
>  	{ }
>  };
>  MODULE_DEVICE_TABLE(spi, ad4080_id);
> @@ -711,6 +725,7 @@ static const struct of_device_id ad4080_of_match[] = {
>  	{ .compatible = "adi,ad4085", &ad4085_chip_info },
>  	{ .compatible = "adi,ad4086", &ad4086_chip_info },
>  	{ .compatible = "adi,ad4087", &ad4087_chip_info },
> +	{ .compatible = "adi,ad4088", &ad4088_chip_info },
>  	{ }
>  };
>  MODULE_DEVICE_TABLE(of, ad4080_of_match);