On Mon, 2024-05-27 at 20:02 +0300, Dumitru Ceclan via B4 Relay wrote:
> From: Dumitru Ceclan <dumitru.ceclan@xxxxxxxxxx>
>
> Add support for selecting REF+ and REF- inputs on all models.
> Add support for selecting ((AVDD1 − AVSS)/5) inputs
> on supported models.
>
> Signed-off-by: Dumitru Ceclan <dumitru.ceclan@xxxxxxxxxx>
> ---
Reviewed-by: Nuno Sa <nuno.sa@xxxxxxxxxx>
> drivers/iio/adc/ad7173.c | 21 +++++++++++++++++++++
> 1 file changed, 21 insertions(+)
>
> diff --git a/drivers/iio/adc/ad7173.c b/drivers/iio/adc/ad7173.c
> index 8a53821c8e58..106a50dbabd4 100644
> --- a/drivers/iio/adc/ad7173.c
> +++ b/drivers/iio/adc/ad7173.c
> @@ -65,6 +65,10 @@
> FIELD_PREP(AD7173_CH_SETUP_AINNEG_MASK, neg))
> #define AD7173_AIN_TEMP_POS 17
> #define AD7173_AIN_TEMP_NEG 18
> +#define AD7173_AIN_COM_IN_POS 19
> +#define AD7173_AIN_COM_IN_NEG 20
> +#define AD7173_AIN_REF_POS 21
> +#define AD7173_AIN_REF_NEG 22
>
> #define AD7172_2_ID 0x00d0
> #define AD7175_ID 0x0cd0
> @@ -145,6 +149,8 @@ struct ad7173_device_info {
> unsigned int id;
> char *name;
> bool has_temp;
> + /* ((AVDD1 − AVSS)/5) */
> + bool has_common_input;
> bool has_input_buf;
> bool has_int_ref;
> bool has_ref2;
> @@ -215,6 +221,7 @@ static const struct ad7173_device_info ad7173_device_info[] = {
> .has_temp = true,
> .has_input_buf = true,
> .has_int_ref = true,
> + .has_common_input = true,
> .clock = 2 * HZ_PER_MHZ,
> .sinc5_data_rates = ad7173_sinc5_data_rates,
> .num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates),
> @@ -229,6 +236,7 @@ static const struct ad7173_device_info ad7173_device_info[] = {
> .has_temp = false,
> .has_input_buf = true,
> .has_ref2 = true,
> + .has_common_input = true,
> .clock = 2 * HZ_PER_MHZ,
> .sinc5_data_rates = ad7173_sinc5_data_rates,
> .num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates),
> @@ -244,6 +252,7 @@ static const struct ad7173_device_info ad7173_device_info[] = {
> .has_input_buf = true,
> .has_int_ref = true,
> .has_ref2 = true,
> + .has_common_input = false,
> .clock = 2 * HZ_PER_MHZ,
> .sinc5_data_rates = ad7173_sinc5_data_rates,
> .num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates),
> @@ -258,6 +267,7 @@ static const struct ad7173_device_info ad7173_device_info[] = {
> .has_temp = true,
> .has_input_buf = true,
> .has_int_ref = true,
> + .has_common_input = true,
> .clock = 16 * HZ_PER_MHZ,
> .sinc5_data_rates = ad7175_sinc5_data_rates,
> .num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates),
> @@ -273,6 +283,7 @@ static const struct ad7173_device_info ad7173_device_info[] = {
> .has_input_buf = true,
> .has_int_ref = true,
> .has_ref2 = true,
> + .has_common_input = true,
> .clock = 16 * HZ_PER_MHZ,
> .sinc5_data_rates = ad7175_sinc5_data_rates,
> .num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates),
> @@ -287,6 +298,7 @@ static const struct ad7173_device_info ad7173_device_info[] = {
> .has_temp = false,
> .has_input_buf = false,
> .has_int_ref = true,
> + .has_common_input = false,
> .clock = 16 * HZ_PER_MHZ,
> .sinc5_data_rates = ad7175_sinc5_data_rates,
> .num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates),
> @@ -301,6 +313,7 @@ static const struct ad7173_device_info ad7173_device_info[] = {
> .has_temp = true,
> .has_input_buf = true,
> .has_int_ref = true,
> + .has_common_input = true,
> .clock = 16 * HZ_PER_MHZ,
> .odr_start_value = AD7177_ODR_START_VALUE,
> .sinc5_data_rates = ad7175_sinc5_data_rates,
> @@ -915,6 +928,14 @@ static int ad7173_validate_voltage_ain_inputs(struct
> ad7173_state *st,
> if (ain[i] < st->info->num_inputs)
> continue;
>
> + if (ain[i] == AD7173_AIN_REF_POS || ain[i] == AD7173_AIN_REF_NEG)
> + continue;
> +
> + if ((ain[i] == AD7173_AIN_COM_IN_POS ||
> + ain[i] == AD7173_AIN_COM_IN_NEG) &&
> + st->info->has_common_input)
> + continue;
> +
> return dev_err_probe(dev, -EINVAL,
> "Input pin number out of range for pair (%d %d).\n",
> ain[0], ain[1]);
>
