diff mbox series

[v4,4/6] iio: adc: ad7173: add support for special inputs

Message ID 20240531-ad4111-v4-4-64607301c057@analog.com (mailing list archive)
State Changes Requested
Headers show
Series Add support for AD411x | expand

Commit Message

Dumitru Ceclan via B4 Relay May 31, 2024, 7:42 p.m. UTC 
From: Dumitru Ceclan <dumitru.ceclan@analog.com>

 Add support for selecting REF+ and REF- inputs on all models.
 Add support for selecting ((AVDD1 − AVSS)/5) inputs
  on supported models.

Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Signed-off-by: Dumitru Ceclan <dumitru.ceclan@analog.com>
---
 drivers/iio/adc/ad7173.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

Comments

Jonathan Cameron June 1, 2024, 6:51 p.m. UTC | #1 
On Fri, 31 May 2024 22:42:30 +0300
Dumitru Ceclan via B4 Relay <devnull+dumitru.ceclan.analog.com@kernel.org> wrote:

> From: Dumitru Ceclan <dumitru.ceclan@analog.com>
> 
>  Add support for selecting REF+ and REF- inputs on all models.
>  Add support for selecting ((AVDD1 − AVSS)/5) inputs
>   on supported models.
> 
> Reviewed-by: Nuno Sa <nuno.sa@analog.com>
> Signed-off-by: Dumitru Ceclan <dumitru.ceclan@analog.com>
Random passing comment inline. This looks fine to me.
> ---
>  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 a20831d99aa5..ebfd2d5f9632 100644
> --- a/drivers/iio/adc/ad7173.c
> +++ b/drivers/iio/adc/ad7173.c
> @@ -66,6 +66,10 @@
>  	 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
> @@ -146,6 +150,8 @@ 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;
> @@ -216,6 +222,7 @@ static const struct ad7173_device_info ad7173_device_info[] = {
>  		.has_temp = true,
>  		.has_input_buf = true,
>  		.has_int_ref = true,
> +		.has_common_input = true,

This is another good reason for breaking up this array (as suggested in v3 review
but perhaps a job for another patch set!)
If you break it up we can see which entry each of these actually is in the diff
rather than having to use line count to figure it out!

>  		.clock = 2 * HZ_PER_MHZ,
>  		.sinc5_data_rates = ad7173_sinc5_data_rates,
>  		.num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates),
> @@ -230,6 +237,7 @@ static const struct ad7173_device_info ad7173_device_info[] = {
diff mbox series

Patch

diff --git a/drivers/iio/adc/ad7173.c b/drivers/iio/adc/ad7173.c
index a20831d99aa5..ebfd2d5f9632 100644
--- a/drivers/iio/adc/ad7173.c
+++ b/drivers/iio/adc/ad7173.c
@@ -66,6 +66,10 @@ 
 	 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
@@ -146,6 +150,8 @@  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;
@@ -216,6 +222,7 @@  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),
@@ -230,6 +237,7 @@  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),
@@ -245,6 +253,7 @@  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),
@@ -259,6 +268,7 @@  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),
@@ -274,6 +284,7 @@  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),
@@ -288,6 +299,7 @@  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),
@@ -302,6 +314,7 @@  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,
@@ -918,6 +931,14 @@  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]);