[PATCH v5 4/6] iio: adc: adi-axi-adc: set data format

Antoniu Miclaus
2024-11-01T11:24:44Z

Add support for selecting the data format within the AXI ADC ip.

Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
---
no changes in v5.
drivers/iio/adc/adi-axi-adc.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)

diff --git a/drivers/iio/adc/adi-axi-adc.c b/drivers/iio/adc/adi-axi-adc.c
index f6475bc93796..6f658d9b4c9d 100644
--- a/drivers/iio/adc/adi-axi-adc.c
+++ b/drivers/iio/adc/adi-axi-adc.c
@@ -45,6 +45,9 @@
#define ADI_AXI_ADC_REG_CTRL 0x0044
#define ADI_AXI_ADC_CTRL_DDR_EDGESEL_MASK BIT(1)

+#define ADI_AXI_ADC_REG_CNTRL_3 0x004c
+#define ADI_AXI_ADC_CNTRL_3_CUSTOM_CTRL_MSK GENMASK(7, 0)
+
#define ADI_AXI_ADC_REG_DRP_STATUS 0x0074
#define ADI_AXI_ADC_DRP_LOCKED BIT(17)

@@ -312,6 +315,24 @@ static int axi_adc_interface_type_get(struct iio_backend *back,
return 0;
}

+static int axi_adc_data_size_set(struct iio_backend *back, ssize_t size)
+{
+ struct adi_axi_adc_state *st = iio_backend_get_priv(back);
+ unsigned int val;
+
+ if (size <= 20)
+ val = 0;
+ else if (size <= 24)
+ val = 1;
+ else if (size <= 32)
+ val = 3;
+ else
+ return -EINVAL;
+
+ return regmap_update_bits(st->regmap, ADI_AXI_ADC_REG_CNTRL_3,
+ ADI_AXI_ADC_CNTRL_3_CUSTOM_CONTROL_MSK, val);
+}
+
static struct iio_buffer *axi_adc_request_buffer(struct iio_backend *back,
struct iio_dev *indio_dev)
{
@@ -360,6 +381,7 @@ static const struct iio_backend_ops adi_axi_adc_ops = {
.test_pattern_set = axi_adc_test_pattern_set,
.chan_status = axi_adc_chan_status,
.interface_type_get = axi_adc_interface_type_get,
+ .data_size_set = axi_adc_data_size_set,
.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),
};
--
2.47.0