[PATCH 10/14] iio: adc: adi-axi-adc: add sync status

[Antoniu Miclaus <antoniu.miclaus@analog.com>]

Add support for checking the ADC sync status.

Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
---
 drivers/iio/adc/adi-axi-adc.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/iio/adc/adi-axi-adc.c b/drivers/iio/adc/adi-axi-adc.c
index 7f6dc0ff7c54..b5c2ba3a44c8 100644
--- a/drivers/iio/adc/adi-axi-adc.c
+++ b/drivers/iio/adc/adi-axi-adc.c
@@ -56,6 +56,9 @@
 #define   AXI_AD408X_CNTRL_3_SELF_SYNC_EN_MSK	BIT(1)
 #define   AXI_AD408X_CNTRL_3_FILTER_EN_MSK	BIT(0)
 
+#define ADI_AXI_ADC_REG_SYNC_STATUS		0x0068
+#define   ADI_AXI_ADC_SYNC			BIT(0)
+
 #define ADI_AXI_ADC_REG_DRP_STATUS		0x0074
 #define   ADI_AXI_ADC_DRP_LOCKED		BIT(17)
 
@@ -453,6 +456,21 @@ static int axi_adc_ad408x_self_sync_disable(struct iio_backend *back)
 				 AXI_AD408X_CNTRL_3_SELF_SYNC_EN_MSK);
 }
 
+static int axi_adc_sync_status_get(struct iio_backend *back, bool *sync_en)
+{
+	struct adi_axi_adc_state *st = iio_backend_get_priv(back);
+	int ret;
+	u32 val;
+
+	ret = regmap_read(st->regmap, ADI_AXI_ADC_REG_SYNC_STATUS, &val);
+	if (ret)
+		return ret;
+
+	*sync_en = (bool)FIELD_GET(ADI_AXI_ADC_SYNC, val);
+
+	return 0;
+}
+
 static struct iio_buffer *axi_adc_request_buffer(struct iio_backend *back,
 						 struct iio_dev *indio_dev)
 {
@@ -600,6 +618,7 @@ 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,
+	.sync_status_get = axi_adc_sync_status_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),
 };
@@ -647,6 +666,7 @@ static const struct iio_backend_ops adi_ad408x_ops = {
 	.bitslip_disable = axi_adc_ad408x_bitslip_disable,
 	.self_sync_enable = axi_adc_ad408x_self_sync_enable,
 	.self_sync_disable = axi_adc_ad408x_self_sync_disable,
+	.sync_status_get = axi_adc_sync_status_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),
 };
-- 
2.48.1