Add support for enabling/disabling oversampling.
Signed-off-by: Antoniu Miclaus <antoniu.miclaus@xxxxxxxxxx>
---
changes in v8:
- use oversampling ratio set.
drivers/iio/adc/adi-axi-adc.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/drivers/iio/adc/adi-axi-adc.c b/drivers/iio/adc/adi-axi-adc.c
index 9a3968769512..24d530789e4c 100644
--- a/drivers/iio/adc/adi-axi-adc.c
+++ b/drivers/iio/adc/adi-axi-adc.c
@@ -46,6 +46,7 @@
#define ADI_AXI_ADC_CTRL_DDR_EDGESEL_MASK BIT(1)
#define ADI_AXI_ADC_REG_CNTRL_3 0x004c
+#define AD485X_CNTRL_3_CUSTOM_CTRL_OS_EN_MSK BIT(2)
#define AD485X_CNTRL_3_CUSTOM_CTRL_PACKET_FORMAT_MSK GENMASK(1, 0)
#define AD485X_PACKET_FORMAT_20BIT 0x0
#define AD485X_PACKET_FORMAT_24BIT 0x1
@@ -357,6 +358,23 @@ static int axi_adc_data_size_set(struct iio_backend *back, unsigned int size)
FIELD_PREP(AD485X_CNTRL_3_CUSTOM_CTRL_PACKET_FORMAT_MSK, val));
}
+static int axi_adc_oversampling_ratio_set(struct iio_backend *back,
+ unsigned int ratio)
+{
+ struct adi_axi_adc_state *st = iio_backend_get_priv(back);
+
+ switch (ratio) {
+ case 0:
+ return -EINVAL;
+ case 1:
+ return regmap_clear_bits(st->regmap, ADI_AXI_ADC_REG_CNTRL_3,
+ AD485X_CNTRL_3_CUSTOM_CTRL_OS_EN_MSK);
+ default:
+ return regmap_set_bits(st->regmap, ADI_AXI_ADC_REG_CNTRL_3,
+ AD485X_CNTRL_3_CUSTOM_CTRL_OS_EN_MSK);
+ }
+}
+
static struct iio_buffer *axi_adc_request_buffer(struct iio_backend *back,
struct iio_dev *indio_dev)
{
@@ -406,6 +424,7 @@ static const struct iio_backend_ops adi_axi_adc_ops = {
.chan_status = axi_adc_chan_status,
.interface_type_get = axi_adc_interface_type_get,
.data_size_set = axi_adc_data_size_set,
+ .oversampling_ratio_set = axi_adc_oversampling_ratio_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),
};
--
2.47.1
