[PATCH v7 4/8] iio: adc: adi-axi-adc: add interface type

Antoniu Miclaus
2024-11-29T15:36:20Z

Add support for getting the interface (CMOS or LVDS) used by the AXI ADC
IP.

Reviewed-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
---
no changes in v7.
drivers/iio/adc/adi-axi-adc.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)

diff --git a/drivers/iio/adc/adi-axi-adc.c b/drivers/iio/adc/adi-axi-adc.c
index 5c8c87eb36d1..f6475bc93796 100644
--- a/drivers/iio/adc/adi-axi-adc.c
+++ b/drivers/iio/adc/adi-axi-adc.c
@@ -39,6 +39,9 @@
#define ADI_AXI_REG_RSTN_MMCM_RSTN BIT(1)
#define ADI_AXI_REG_RSTN_RSTN BIT(0)

+#define ADI_AXI_ADC_REG_CONFIG 0x000c
+#define ADI_AXI_ADC_REG_CONFIG_CMOS_OR_LVDS_N BIT(7)
+
#define ADI_AXI_ADC_REG_CTRL 0x0044
#define ADI_AXI_ADC_CTRL_DDR_EDGESEL_MASK BIT(1)

@@ -290,6 +293,25 @@ static int axi_adc_chan_disable(struct iio_backend *back, unsigned int chan)
ADI_AXI_REG_CHAN_CTRL_ENABLE);
}

+static int axi_adc_interface_type_get(struct iio_backend *back,
+ enum iio_backend_interface_type *type)
+{
+ struct adi_axi_adc_state *st = iio_backend_get_priv(back);
+ unsigned int val;
+ int ret;
+
+ ret = regmap_read(st->regmap, ADI_AXI_ADC_REG_CONFIG, &val);
+ if (ret)
+ return ret;
+
+ if (val & ADI_AXI_ADC_REG_CONFIG_CMOS_OR_LVDS_N)
+ *type = IIO_BACKEND_INTERFACE_SERIAL_CMOS;
+ else
+ *type = IIO_BACKEND_INTERFACE_SERIAL_LVDS;
+
+ return 0;
+}
+
static struct iio_buffer *axi_adc_request_buffer(struct iio_backend *back,
struct iio_dev *indio_dev)
{
@@ -337,6 +359,7 @@ static const struct iio_backend_ops adi_axi_adc_ops = {
.iodelay_set = axi_adc_iodelays_set,
.test_pattern_set = axi_adc_test_pattern_set,
.chan_status = axi_adc_chan_status,
+ .interface_type_get = axi_adc_interface_type_get,
.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