diff mbox series

[v4,1/8] iio: adc: ad7606: add 'bits' parameter to channels macros

Message ID 20240905082404.119022-2-aardelean@baylibre.com (mailing list archive)
State Changes Requested
Headers show
Series iio: adc: ad7606: add support for AD7606C-{16,18} parts | expand

Commit Message

Alexandru Ardelean Sept. 5, 2024, 8:23 a.m. UTC 
There are some newer additions to the AD7606 family, which support 18 bit
precision.
Up until now, all chips were 16 bit.

This change adds a 'bits' parameter to the AD760X_CHANNEL macro and renames
'ad7606_channels' -> 'ad7606_channels_16bit' for the current devices.

The AD7606_SW_CHANNEL() macro is also introduced, as a short-hand for IIO
channels in SW mode.

Signed-off-by: Alexandru Ardelean <aardelean@baylibre.com>
---
 drivers/iio/adc/ad7606.c     | 58 ++++++++++++++++++------------------
 drivers/iio/adc/ad7606.h     | 18 ++++++-----
 drivers/iio/adc/ad7606_spi.c | 16 +++++-----
 3 files changed, 47 insertions(+), 45 deletions(-)

Comments

David Lechner Sept. 5, 2024, 9:25 p.m. UTC | #1 
On 9/5/24 3:23 AM, Alexandru Ardelean wrote:
> There are some newer additions to the AD7606 family, which support 18 bit
> precision.
> Up until now, all chips were 16 bit.
> 
> This change adds a 'bits' parameter to the AD760X_CHANNEL macro and renames
> 'ad7606_channels' -> 'ad7606_channels_16bit' for the current devices.
> 
> The AD7606_SW_CHANNEL() macro is also introduced, as a short-hand for IIO
> channels in SW mode.
> 
> Signed-off-by: Alexandru Ardelean <aardelean@baylibre.com>
> ---

...

> diff --git a/drivers/iio/adc/ad7606.h b/drivers/iio/adc/ad7606.h
> index 0c6a88cc4695..771121350f98 100644
> --- a/drivers/iio/adc/ad7606.h
> +++ b/drivers/iio/adc/ad7606.h
> @@ -8,7 +8,7 @@
>  #ifndef IIO_ADC_AD7606_H_
>  #define IIO_ADC_AD7606_H_
>  
> -#define AD760X_CHANNEL(num, mask_sep, mask_type, mask_all) {	\
> +#define AD760X_CHANNEL(num, mask_sep, mask_type, mask_all, bits) {	\
>  		.type = IIO_VOLTAGE,				\
>  		.indexed = 1,					\
>  		.channel = num,					\
> @@ -19,24 +19,26 @@
>  		.scan_index = num,				\
>  		.scan_type = {					\
>  			.sign = 's',				\
> -			.realbits = 16,				\
> -			.storagebits = 16,			\
> +			.realbits = (bits),			\
> +			.storagebits = (bits),			\

Technically OK in this patch since bits is still always 16 but we
can avoid changing the same line again later to:

	(bits) > 16 ? 32 : 16

if we just do that in this patch.


>  			.endianness = IIO_CPU,			\
>  		},						\
>  }
Alexandru Ardelean Sept. 6, 2024, 5:10 a.m. UTC | #2 
On Fri, Sep 6, 2024 at 12:25 AM David Lechner <dlechner@baylibre.com> wrote:
>
> On 9/5/24 3:23 AM, Alexandru Ardelean wrote:
> > There are some newer additions to the AD7606 family, which support 18 bit
> > precision.
> > Up until now, all chips were 16 bit.
> >
> > This change adds a 'bits' parameter to the AD760X_CHANNEL macro and renames
> > 'ad7606_channels' -> 'ad7606_channels_16bit' for the current devices.
> >
> > The AD7606_SW_CHANNEL() macro is also introduced, as a short-hand for IIO
> > channels in SW mode.
> >
> > Signed-off-by: Alexandru Ardelean <aardelean@baylibre.com>
> > ---
>
> ...
>
> > diff --git a/drivers/iio/adc/ad7606.h b/drivers/iio/adc/ad7606.h
> > index 0c6a88cc4695..771121350f98 100644
> > --- a/drivers/iio/adc/ad7606.h
> > +++ b/drivers/iio/adc/ad7606.h
> > @@ -8,7 +8,7 @@
> >  #ifndef IIO_ADC_AD7606_H_
> >  #define IIO_ADC_AD7606_H_
> >
> > -#define AD760X_CHANNEL(num, mask_sep, mask_type, mask_all) { \
> > +#define AD760X_CHANNEL(num, mask_sep, mask_type, mask_all, bits) {   \
> >               .type = IIO_VOLTAGE,                            \
> >               .indexed = 1,                                   \
> >               .channel = num,                                 \
> > @@ -19,24 +19,26 @@
> >               .scan_index = num,                              \
> >               .scan_type = {                                  \
> >                       .sign = 's',                            \
> > -                     .realbits = 16,                         \
> > -                     .storagebits = 16,                      \
> > +                     .realbits = (bits),                     \
> > +                     .storagebits = (bits),                  \
>
> Technically OK in this patch since bits is still always 16 but we
> can avoid changing the same line again later to:
>
>         (bits) > 16 ? 32 : 16
>
> if we just do that in this patch.

sure
will update

>
>
> >                       .endianness = IIO_CPU,                  \
> >               },                                              \
> >  }
diff mbox series

Patch

diff --git a/drivers/iio/adc/ad7606.c b/drivers/iio/adc/ad7606.c
index 539e4a8621fe..dba1f28782e4 100644
--- a/drivers/iio/adc/ad7606.c
+++ b/drivers/iio/adc/ad7606.c
@@ -333,16 +333,16 @@  static const struct iio_chan_spec ad7605_channels[] = {
 	AD7605_CHANNEL(3),
 };
 
-static const struct iio_chan_spec ad7606_channels[] = {
+static const struct iio_chan_spec ad7606_channels_16bit[] = {
 	IIO_CHAN_SOFT_TIMESTAMP(8),
-	AD7606_CHANNEL(0),
-	AD7606_CHANNEL(1),
-	AD7606_CHANNEL(2),
-	AD7606_CHANNEL(3),
-	AD7606_CHANNEL(4),
-	AD7606_CHANNEL(5),
-	AD7606_CHANNEL(6),
-	AD7606_CHANNEL(7),
+	AD7606_CHANNEL(0, 16),
+	AD7606_CHANNEL(1, 16),
+	AD7606_CHANNEL(2, 16),
+	AD7606_CHANNEL(3, 16),
+	AD7606_CHANNEL(4, 16),
+	AD7606_CHANNEL(5, 16),
+	AD7606_CHANNEL(6, 16),
+	AD7606_CHANNEL(7, 16),
 };
 
 /*
@@ -357,22 +357,22 @@  static const struct iio_chan_spec ad7606_channels[] = {
  */
 static const struct iio_chan_spec ad7616_channels[] = {
 	IIO_CHAN_SOFT_TIMESTAMP(16),
-	AD7606_CHANNEL(0),
-	AD7606_CHANNEL(1),
-	AD7606_CHANNEL(2),
-	AD7606_CHANNEL(3),
-	AD7606_CHANNEL(4),
-	AD7606_CHANNEL(5),
-	AD7606_CHANNEL(6),
-	AD7606_CHANNEL(7),
-	AD7606_CHANNEL(8),
-	AD7606_CHANNEL(9),
-	AD7606_CHANNEL(10),
-	AD7606_CHANNEL(11),
-	AD7606_CHANNEL(12),
-	AD7606_CHANNEL(13),
-	AD7606_CHANNEL(14),
-	AD7606_CHANNEL(15),
+	AD7606_CHANNEL(0, 16),
+	AD7606_CHANNEL(1, 16),
+	AD7606_CHANNEL(2, 16),
+	AD7606_CHANNEL(3, 16),
+	AD7606_CHANNEL(4, 16),
+	AD7606_CHANNEL(5, 16),
+	AD7606_CHANNEL(6, 16),
+	AD7606_CHANNEL(7, 16),
+	AD7606_CHANNEL(8, 16),
+	AD7606_CHANNEL(9, 16),
+	AD7606_CHANNEL(10, 16),
+	AD7606_CHANNEL(11, 16),
+	AD7606_CHANNEL(12, 16),
+	AD7606_CHANNEL(13, 16),
+	AD7606_CHANNEL(14, 16),
+	AD7606_CHANNEL(15, 16),
 };
 
 static const struct ad7606_chip_info ad7606_chip_info_tbl[] = {
@@ -382,25 +382,25 @@  static const struct ad7606_chip_info ad7606_chip_info_tbl[] = {
 		.num_channels = 5,
 	},
 	[ID_AD7606_8] = {
-		.channels = ad7606_channels,
+		.channels = ad7606_channels_16bit,
 		.num_channels = 9,
 		.oversampling_avail = ad7606_oversampling_avail,
 		.oversampling_num = ARRAY_SIZE(ad7606_oversampling_avail),
 	},
 	[ID_AD7606_6] = {
-		.channels = ad7606_channels,
+		.channels = ad7606_channels_16bit,
 		.num_channels = 7,
 		.oversampling_avail = ad7606_oversampling_avail,
 		.oversampling_num = ARRAY_SIZE(ad7606_oversampling_avail),
 	},
 	[ID_AD7606_4] = {
-		.channels = ad7606_channels,
+		.channels = ad7606_channels_16bit,
 		.num_channels = 5,
 		.oversampling_avail = ad7606_oversampling_avail,
 		.oversampling_num = ARRAY_SIZE(ad7606_oversampling_avail),
 	},
 	[ID_AD7606B] = {
-		.channels = ad7606_channels,
+		.channels = ad7606_channels_16bit,
 		.num_channels = 9,
 		.oversampling_avail = ad7606_oversampling_avail,
 		.oversampling_num = ARRAY_SIZE(ad7606_oversampling_avail),
diff --git a/drivers/iio/adc/ad7606.h b/drivers/iio/adc/ad7606.h
index 0c6a88cc4695..771121350f98 100644
--- a/drivers/iio/adc/ad7606.h
+++ b/drivers/iio/adc/ad7606.h
@@ -8,7 +8,7 @@ 
 #ifndef IIO_ADC_AD7606_H_
 #define IIO_ADC_AD7606_H_
 
-#define AD760X_CHANNEL(num, mask_sep, mask_type, mask_all) {	\
+#define AD760X_CHANNEL(num, mask_sep, mask_type, mask_all, bits) {	\
 		.type = IIO_VOLTAGE,				\
 		.indexed = 1,					\
 		.channel = num,					\
@@ -19,24 +19,26 @@ 
 		.scan_index = num,				\
 		.scan_type = {					\
 			.sign = 's',				\
-			.realbits = 16,				\
-			.storagebits = 16,			\
+			.realbits = (bits),			\
+			.storagebits = (bits),			\
 			.endianness = IIO_CPU,			\
 		},						\
 }
 
 #define AD7605_CHANNEL(num)				\
 	AD760X_CHANNEL(num, BIT(IIO_CHAN_INFO_RAW),	\
-		BIT(IIO_CHAN_INFO_SCALE), 0)
+		BIT(IIO_CHAN_INFO_SCALE), 0, 16)
 
-#define AD7606_CHANNEL(num)				\
+#define AD7606_CHANNEL(num, bits)			\
 	AD760X_CHANNEL(num, BIT(IIO_CHAN_INFO_RAW),	\
 		BIT(IIO_CHAN_INFO_SCALE),		\
-		BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO))
+		BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), bits)
 
-#define AD7616_CHANNEL(num)	\
+#define AD7606_SW_CHANNEL(num, bits)	\
 	AD760X_CHANNEL(num, BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),\
-		0, BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO))
+		0, BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), bits)
+
+#define AD7616_CHANNEL(num)	AD7606_SW_CHANNEL(num, 16)
 
 /**
  * struct ad7606_chip_info - chip specific information
diff --git a/drivers/iio/adc/ad7606_spi.c b/drivers/iio/adc/ad7606_spi.c
index 62ec12195307..e00f58a6a0e9 100644
--- a/drivers/iio/adc/ad7606_spi.c
+++ b/drivers/iio/adc/ad7606_spi.c
@@ -67,14 +67,14 @@  static const struct iio_chan_spec ad7616_sw_channels[] = {
 
 static const struct iio_chan_spec ad7606b_sw_channels[] = {
 	IIO_CHAN_SOFT_TIMESTAMP(8),
-	AD7616_CHANNEL(0),
-	AD7616_CHANNEL(1),
-	AD7616_CHANNEL(2),
-	AD7616_CHANNEL(3),
-	AD7616_CHANNEL(4),
-	AD7616_CHANNEL(5),
-	AD7616_CHANNEL(6),
-	AD7616_CHANNEL(7),
+	AD7606_SW_CHANNEL(0, 16),
+	AD7606_SW_CHANNEL(1, 16),
+	AD7606_SW_CHANNEL(2, 16),
+	AD7606_SW_CHANNEL(3, 16),
+	AD7606_SW_CHANNEL(4, 16),
+	AD7606_SW_CHANNEL(5, 16),
+	AD7606_SW_CHANNEL(6, 16),
+	AD7606_SW_CHANNEL(7, 16),
 };
 
 static const unsigned int ad7606B_oversampling_avail[9] = {