iio: adc: adi-axi-adc: Add support for CRC

Add support for Enabling and Disabling CRC

Signed-off-by: Janani Sunil <janani.sunil@analog.com>

Author: jansunil

drivers/iio/adc/adi-axi-adc.c

@@ -43,6 +43,7 @@
 #define   ADI_AXI_ADC_REG_CONFIG_CMOS_OR_LVDS_N	BIT(7)
 
 #define ADI_AXI_ADC_REG_CTRL			0x0044
+#define    ADI_AXI_ADC_REG_CTRL_CRC_EN_MASK	BIT(8)
 #define    ADI_AXI_ADC_CTRL_NUM_LANES_MSK	GENMASK(12, 8)
 #define    ADI_AXI_ADC_CTRL_SYNC_MSK		BIT(3)
 #define    ADI_AXI_ADC_CTRL_DDR_EDGESEL_MASK	BIT(1)
@@ -568,6 +569,22 @@ static int axi_adc_reg_access(struct iio_backend *back, unsigned int reg,
 	return regmap_write(st->regmap, reg, writeval);
 }
 
+static int axi_adc_crc_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,
+			       ADI_AXI_ADC_REG_CTRL_CRC_EN_MASK);
+}
+
+static int axi_adc_crc_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,
+				 ADI_AXI_ADC_REG_CTRL_CRC_EN_MASK);
+}
+
 static const struct regmap_config axi_adc_regmap_config = {
 	.val_bits = 32,
 	.reg_bits = 32,
@@ -621,6 +638,8 @@ static const struct iio_backend_ops adi_axi_adc_ops = {
 	.num_lanes_set = axi_adc_num_lanes_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),
+	.crc_enable = axi_adc_crc_enable,
+	.crc_disable = axi_adc_crc_disable,
 };
 
 static const struct iio_backend_info adi_axi_adc_generic = {
@@ -645,6 +664,8 @@ static const struct iio_backend_ops adi_ad485x_ops = {
 	.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),
+	.crc_enable = axi_adc_crc_enable,
+	.crc_disable = axi_adc_crc_disable,
 };
 
 static const struct iio_backend_info axi_ad485x = {