iio: trx-rf: ad9088: Add mcs_track_decimation debugfs entry and widen to u32

Add debugfs read/write support for mcs_track_decimation allowing runtime
adjustment of the MCS tracking calibration TDC decimation rate. Change
mcs_track_decimation from u16 to u32 to match the API.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>

Author: mhennerich

drivers/iio/trx-rf/ad9088/ad9088.h

@@ -259,7 +259,7 @@ struct ad9088_phy {
 	bool cddc_sample_delay_en;
 	bool fddc_sample_delay_en;
 	u32 multidevice_instance_count;
-	u16 mcs_track_decimation;
+	u32 mcs_track_decimation;
 
 	struct ad9088_debugfs_entry debugfs_entry[32];
 	u32 ad9088_debugfs_entry_index;
@@ -372,7 +372,7 @@ int ad9088_delta_t_measurement_set(struct ad9088_phy *phy, u32 mode);
 int ad9088_delta_t_measurement_get(struct ad9088_phy *phy, u32 mode, s64 *apollo_delta_t);
 int ad9088_mcs_init_cal_validate(struct ad9088_phy *phy,
 				 adi_apollo_mcs_cal_init_status_t *init_cal_status);
-int ad9088_mcs_tracking_cal_setup(struct ad9088_phy *phy, u16 mcs_track_decimation,
+int ad9088_mcs_tracking_cal_setup(struct ad9088_phy *phy, u32 mcs_track_decimation,
 				  u16 initialize_track_cal);
 int ad9088_mcs_init_cal_status_print(struct ad9088_phy *phy, char *buf,
 				     adi_apollo_mcs_cal_init_status_t *status);

drivers/iio/trx-rf/ad9088/ad9088_debugfs.c

@@ -37,6 +37,7 @@ enum ad9088_debugfs_cmd {
 	DBGFS_MCS_TRACK_STATUS,
 	DBGFS_MCS_INIT_CAL_STATUS,
 	DBGFS_MCS_TRACK_CAL_VALIDATE,
+	DBGFS_MCS_TRACK_DECIMATION,
 };
 
 static const u8 lanes_all[] = {
@@ -352,6 +353,9 @@ static ssize_t ad9088_debugfs_read(struct file *file, char __user *userbuf,
 				len = snprintf(phy->dbuf, sizeof(phy->dbuf), "%lld\n",
 					       entry->delta_t);
 			break;
+		case DBGFS_MCS_TRACK_DECIMATION:
+			val = phy->mcs_track_decimation;
+			break;
 		case DBGFS_MCS_BG_TRACK_CAL_RUN:
 			val = phy->mcs_cal_bg_tracking_run;
 			break;
@@ -689,6 +693,11 @@ static ssize_t ad9088_debugfs_write(struct file *file,
 		if (val)
 			ret = ad9088_mcs_tracking_cal_setup(phy, phy->mcs_track_decimation, 1);
 		break;
+	case DBGFS_MCS_TRACK_DECIMATION:
+		phy->mcs_track_decimation = val;
+		ret = adi_apollo_mcs_cal_tracking_decimation_set(&phy->ad9088, phy->mcs_track_decimation);
+		ret = ad9088_check_apollo_error(&phy->spi->dev, ret, "adi_apollo_mcs_cal_tracking_decimation_set");
+		break;
 	case DBGFS_MCS_FG_TRACK_CAL_RUN:
 		if (val) {
 			ret = adi_apollo_mcs_cal_fg_tracking_run(&phy->ad9088);
@@ -833,6 +842,8 @@ void ad9088_debugfs_register(struct iio_dev *indio_dev)
 				 "mcs_init_cal_status", DBGFS_MCS_INIT_CAL_STATUS);
 	ad9088_add_debugfs_entry(phy, indio_dev,
 				 "mcs_track_cal_validate", DBGFS_MCS_TRACK_CAL_VALIDATE);
+	ad9088_add_debugfs_entry(phy, indio_dev,
+				 "mcs_track_decimation", DBGFS_MCS_TRACK_DECIMATION);
 
 	for (i = 0; i < phy->ad9088_debugfs_entry_index; i++)
 		debugfs_create_file(phy->debugfs_entry[i].propname, 0644,

drivers/iio/trx-rf/ad9088/ad9088_dt.c

@@ -180,7 +180,7 @@ int ad9088_parse_dt(struct ad9088_phy *phy)
 	 * periodic SYSREF, keep below 32768. Default: 1023.
 	 */
 	phy->mcs_track_decimation = 1023;
-	of_property_read_u16(node, "adi,mcs-track-decimation", &phy->mcs_track_decimation);
+	of_property_read_u32(node, "adi,mcs-track-decimation", &phy->mcs_track_decimation);
 
 	phy->trig_sync_en = of_property_read_bool(node, "adi,trigger-sync-en");
 

drivers/iio/trx-rf/ad9088/ad9088_mcs.c

@@ -264,7 +264,7 @@ int ad9088_mcs_init_cal_validate(struct ad9088_phy *phy,
 	return ret;
 }
 
-int ad9088_mcs_tracking_cal_setup(struct ad9088_phy *phy, u16 mcs_track_decimation,
+int ad9088_mcs_tracking_cal_setup(struct ad9088_phy *phy, u32 mcs_track_decimation,
 				  u16 initialize_track_cal)
 {
 	adi_apollo_device_t *device = &phy->ad9088;