[PATCH v7 6/8] iio: adc: adi-axi-adc: add oversampling

Antoniu Miclaus
2024-11-29T15:36:24Z

Add support for enabling/disabling oversampling.

Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
---
drivers/iio/adc/adi-axi-adc.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
changes in v7:
- use regmap set/clear bits functions
- use enable/disable functions
diff --git a/drivers/iio/adc/adi-axi-adc.c b/drivers/iio/adc/adi-axi-adc.c
index cb3b8299a65e..3128e2543e22 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
@@ -342,6 +343,22 @@ static int axi_adc_data_size_set(struct iio_backend *back, unsigned int size)
AD485X_CNTRL_3_CUSTOM_CTRL_PACKET_FORMAT_MSK, val);
}

+static int axi_adc_oversampling_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_CNTRL_3,
+ AD485X_CNTRL_3_CUSTOM_CTRL_OS_EN_MSK);
+}
+
+static int axi_adc_oversampling_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_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)
{
@@ -391,6 +408,8 @@ 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_enable = axi_adc_oversampling_enable,
+ .oversampling_disable = axi_adc_oversampling_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),
};
--
2.47.1