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[PATCH v3 07/11] iio: adc: adi-axi-adc: add sync enable/disable

Antoniu Miclaus posted 11 patches 9 months, 2 weeks ago
There is a newer version of this series
[PATCH v3 07/11] iio: adc: adi-axi-adc: add sync enable/disable
Posted by Antoniu Miclaus 9 months, 2 weeks ago 
Add support for enabling/disabling the sync process used for data
capture alignment.

Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
---
changes in v3:
 - update the function to match the new backend interface.
 drivers/iio/adc/adi-axi-adc.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/drivers/iio/adc/adi-axi-adc.c b/drivers/iio/adc/adi-axi-adc.c
index 2a3a6c3f5e59..9947be059f98 100644
--- a/drivers/iio/adc/adi-axi-adc.c
+++ b/drivers/iio/adc/adi-axi-adc.c
@@ -44,6 +44,7 @@
 #define   ADI_AXI_ADC_REG_CONFIG_CMOS_OR_LVDS_N	BIT(7)
 
 #define ADI_AXI_ADC_REG_CTRL			0x0044
+#define    AXI_AD408X_CTRL_SYNC_MSK		BIT(3)
 #define    ADI_AXI_ADC_CTRL_DDR_EDGESEL_MASK	BIT(1)
 
 #define ADI_AXI_ADC_REG_CNTRL_3			0x004c
@@ -416,6 +417,22 @@ static int axi_adc_ad408x_filter_type_set(struct iio_backend *back,
 				 AXI_AD408X_CNTRL_3_FILTER_EN_MSK);
 }
 
+static int axi_adc_sync_enable(struct iio_backend *back)
+{
+	struct adi_axi_adc_state *st = iio_backend_get_priv(back);
+
+	return regmap_set_bits(st->regmap, ADI_AXI_ADC_REG_CTRL,
+			       AXI_AD408X_CTRL_SYNC_MSK);
+}
+
+static int axi_adc_sync_disable(struct iio_backend *back)
+{
+	struct adi_axi_adc_state *st = iio_backend_get_priv(back);
+
+	return regmap_clear_bits(st->regmap, ADI_AXI_ADC_REG_CTRL,
+				 AXI_AD408X_CTRL_SYNC_MSK);
+}
+
 static struct iio_buffer *axi_adc_request_buffer(struct iio_backend *back,
 						 struct iio_dev *indio_dev)
 {
@@ -559,6 +576,8 @@ static const struct iio_backend_ops adi_axi_adc_ops = {
 	.request_buffer = axi_adc_request_buffer,
 	.free_buffer = axi_adc_free_buffer,
 	.data_sample_trigger = axi_adc_data_sample_trigger,
+	.data_alignment_enable = axi_adc_sync_enable,
+	.data_alignment_disable = axi_adc_sync_disable,
 	.iodelay_set = axi_adc_iodelays_set,
 	.test_pattern_set = axi_adc_test_pattern_set,
 	.chan_status = axi_adc_chan_status,
@@ -605,6 +624,8 @@ static const struct iio_backend_ops adi_ad408x_ops = {
 	.free_buffer = axi_adc_free_buffer,
 	.data_sample_trigger = axi_adc_data_sample_trigger,
 	.filter_type_set = axi_adc_ad408x_filter_type_set,
+	.data_alignment_enable = axi_adc_sync_enable,
+	.data_alignment_disable = axi_adc_sync_disable,
 	.debugfs_reg_access = iio_backend_debugfs_ptr(axi_adc_reg_access),
 	.debugfs_print_chan_status = iio_backend_debugfs_ptr(axi_adc_debugfs_print_chan_status),
 };
-- 
2.49.0
Re: [PATCH v3 07/11] iio: adc: adi-axi-adc: add sync enable/disable
Posted by David Lechner 9 months, 2 weeks ago 
On 4/25/25 6:25 AM, Antoniu Miclaus wrote:
> Add support for enabling/disabling the sync process used for data
> capture alignment.
> 
> Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
> ---
> changes in v3:
>  - update the function to match the new backend interface.
>  drivers/iio/adc/adi-axi-adc.c | 21 +++++++++++++++++++++
>  1 file changed, 21 insertions(+)
> 
> diff --git a/drivers/iio/adc/adi-axi-adc.c b/drivers/iio/adc/adi-axi-adc.c
> index 2a3a6c3f5e59..9947be059f98 100644
> --- a/drivers/iio/adc/adi-axi-adc.c
> +++ b/drivers/iio/adc/adi-axi-adc.c
> @@ -44,6 +44,7 @@
>  #define   ADI_AXI_ADC_REG_CONFIG_CMOS_OR_LVDS_N	BIT(7)
>  
>  #define ADI_AXI_ADC_REG_CTRL			0x0044
> +#define    AXI_AD408X_CTRL_SYNC_MSK		BIT(3)

If this bit applies to AXI ADC in general, then it shouldn't have AD408X in the
name. Or, if this is really specific to AD408X, then...

>  #define    ADI_AXI_ADC_CTRL_DDR_EDGESEL_MASK	BIT(1)
>  
>  #define ADI_AXI_ADC_REG_CNTRL_3			0x004c
> @@ -416,6 +417,22 @@ static int axi_adc_ad408x_filter_type_set(struct iio_backend *back,
>  				 AXI_AD408X_CNTRL_3_FILTER_EN_MSK);
>  }
>  
> +static int axi_adc_sync_enable(struct iio_backend *back)
> +{
> +	struct adi_axi_adc_state *st = iio_backend_get_priv(back);
> +
> +	return regmap_set_bits(st->regmap, ADI_AXI_ADC_REG_CTRL,
> +			       AXI_AD408X_CTRL_SYNC_MSK);
> +}
> +
> +static int axi_adc_sync_disable(struct iio_backend *back)
> +{
> +	struct adi_axi_adc_state *st = iio_backend_get_priv(back);
> +
> +	return regmap_clear_bits(st->regmap, ADI_AXI_ADC_REG_CTRL,
> +				 AXI_AD408X_CTRL_SYNC_MSK);
> +}

... these functions should have ad408x in the name to make that clear and ...

> +
>  static struct iio_buffer *axi_adc_request_buffer(struct iio_backend *back,
>  						 struct iio_dev *indio_dev)
>  {
> @@ -559,6 +576,8 @@ static const struct iio_backend_ops adi_axi_adc_ops = {
>  	.request_buffer = axi_adc_request_buffer,
>  	.free_buffer = axi_adc_free_buffer,
>  	.data_sample_trigger = axi_adc_data_sample_trigger,
> +	.data_alignment_enable = axi_adc_sync_enable,
> +	.data_alignment_disable = axi_adc_sync_disable,

... we shouldn't be adding them to the generic core ops.

>  	.iodelay_set = axi_adc_iodelays_set,
>  	.test_pattern_set = axi_adc_test_pattern_set,
>  	.chan_status = axi_adc_chan_status,
> @@ -605,6 +624,8 @@ static const struct iio_backend_ops adi_ad408x_ops = {
>  	.free_buffer = axi_adc_free_buffer,
>  	.data_sample_trigger = axi_adc_data_sample_trigger,
>  	.filter_type_set = axi_adc_ad408x_filter_type_set,
> +	.data_alignment_enable = axi_adc_sync_enable,
> +	.data_alignment_disable = axi_adc_sync_disable,
>  	.debugfs_reg_access = iio_backend_debugfs_ptr(axi_adc_reg_access),
>  	.debugfs_print_chan_status = iio_backend_debugfs_ptr(axi_adc_debugfs_print_chan_status),
>  };
Re: [PATCH v3 07/11] iio: adc: adi-axi-adc: add sync enable/disable
Posted by Nuno Sá 9 months, 2 weeks ago 
On Fri, 2025-04-25 at 14:25 +0300, Antoniu Miclaus wrote:
> Add support for enabling/disabling the sync process used for data
> capture alignment.
> 
> Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
> ---

Some comments from me... I'm also still not convinced this API can't be merged
with the sync get. More comments on the frontend driver patch.

> changes in v3:
>  - update the function to match the new backend interface.
>  drivers/iio/adc/adi-axi-adc.c | 21 +++++++++++++++++++++
>  1 file changed, 21 insertions(+)
> 
> diff --git a/drivers/iio/adc/adi-axi-adc.c b/drivers/iio/adc/adi-axi-adc.c
> index 2a3a6c3f5e59..9947be059f98 100644
> --- a/drivers/iio/adc/adi-axi-adc.c
> +++ b/drivers/iio/adc/adi-axi-adc.c
> @@ -44,6 +44,7 @@
>  #define   ADI_AXI_ADC_REG_CONFIG_CMOS_OR_LVDS_N	BIT(7)
>  
>  #define ADI_AXI_ADC_REG_CTRL			0x0044
> +#define    AXI_AD408X_CTRL_SYNC_MSK		BIT(3)
>  #define    ADI_AXI_ADC_CTRL_DDR_EDGESEL_MASK	BIT(1)
>  
>  #define ADI_AXI_ADC_REG_CNTRL_3			0x004c
> @@ -416,6 +417,22 @@ static int axi_adc_ad408x_filter_type_set(struct
> iio_backend *back,
>  				 AXI_AD408X_CNTRL_3_FILTER_EN_MSK);
>  }
>  
> +static int axi_adc_sync_enable(struct iio_backend *back)
> +{
> +	struct adi_axi_adc_state *st = iio_backend_get_priv(back);
> +
> +	return regmap_set_bits(st->regmap, ADI_AXI_ADC_REG_CTRL,
> +			       AXI_AD408X_CTRL_SYNC_MSK);
> +}
> +
> +static int axi_adc_sync_disable(struct iio_backend *back)
> +{
> +	struct adi_axi_adc_state *st = iio_backend_get_priv(back);
> +
> +	return regmap_clear_bits(st->regmap, ADI_AXI_ADC_REG_CTRL,
> +				 AXI_AD408X_CTRL_SYNC_MSK);
> +}
> +
>  static struct iio_buffer *axi_adc_request_buffer(struct iio_backend *back,
>  						 struct iio_dev *indio_dev)
>  {
> @@ -559,6 +576,8 @@ static const struct iio_backend_ops adi_axi_adc_ops = {
>  	.request_buffer = axi_adc_request_buffer,
>  	.free_buffer = axi_adc_free_buffer,
>  	.data_sample_trigger = axi_adc_data_sample_trigger,
> +	.data_alignment_enable = axi_adc_sync_enable,
> +	.data_alignment_disable = axi_adc_sync_disable,

Same comment as for the number of lanes op...
>  	.iodelay_set = axi_adc_iodelays_set,
>  	.test_pattern_set = axi_adc_test_pattern_set,
>  	.chan_status = axi_adc_chan_status,
> @@ -605,6 +624,8 @@ static const struct iio_backend_ops adi_ad408x_ops = {
>  	.free_buffer = axi_adc_free_buffer,
>  	.data_sample_trigger = axi_adc_data_sample_trigger,
>  	.filter_type_set = axi_adc_ad408x_filter_type_set,
> +	.data_alignment_enable = axi_adc_sync_enable,
> +	.data_alignment_disable = axi_adc_sync_disable,

Are we using the disable op at all?

>  	.debugfs_reg_access = iio_backend_debugfs_ptr(axi_adc_reg_access),
>  	.debugfs_print_chan_status =
> iio_backend_debugfs_ptr(axi_adc_debugfs_print_chan_status),
>  };

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