diff mbox series

[v3,3/6] iio: adc: adi-axi-adc: add interface type

Message ID 20241014094154.9439-3-antoniu.miclaus@analog.com
State Superseded
Headers show
Series [v3,1/6] iio: backend: add API for interface get | expand

Commit Message

Miclaus, Antoniu Oct. 14, 2024, 9:40 a.m. UTC 
Add support for getting the interface (CMOS or LVDS) used by the AXI ADC
ip.

Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
---
no changes in v3.
 drivers/iio/adc/adi-axi-adc.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

Comments

Andy Shevchenko Oct. 14, 2024, 11:42 a.m. UTC | #1 
On Mon, Oct 14, 2024 at 12:40:37PM +0300, Antoniu Miclaus wrote:
> Add support for getting the interface (CMOS or LVDS) used by the AXI ADC
> ip.

IP

...

>  #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)

Side note, the field definitions are indented with different amount of white
spaces.
diff mbox series

Patch

diff --git a/drivers/iio/adc/adi-axi-adc.c b/drivers/iio/adc/adi-axi-adc.c
index 21ce7564e83d..ff48f26e02a3 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)
 
@@ -249,6 +252,25 @@  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_CMOS;
+	else
+		*type = IIO_BACKEND_INTERFACE_LVDS;
+
+	return 0;
+}
+
 static struct iio_buffer *axi_adc_request_buffer(struct iio_backend *back,
 						 struct iio_dev *indio_dev)
 {
@@ -285,6 +307,7 @@  static const struct iio_backend_ops adi_axi_adc_generic = {
 	.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,
 };
 
 static int adi_axi_adc_probe(struct platform_device *pdev)