[PATCH BlueZ v2 1/3] doc: Add org.bluez.CSDistance1 documentation

Document the org.bluez.CSDistance1 interface, which
exposes the DistanceMeters estimate computed by an
external ranging provider registered via
CSDistanceProviderManager.
---
 Makefile.am                   |  9 +++++++--
 doc/org.bluez.CSDistance1.rst | 36 +++++++++++++++++++++++++++++++++++
 2 files changed, 43 insertions(+), 2 deletions(-)
 create mode 100644 doc/org.bluez.CSDistance1.rst

diff --git a/Makefile.am b/Makefile.am
index 19c468d3a..00b4ac2b1 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -405,7 +405,8 @@ man_MANS += doc/org.bluez.Telephony.5 doc/org.bluez.Call.5
 man_MANS += doc/org.bluez.ThermometerManager.5 \
 		doc/org.bluez.Thermometer.5 \
 		doc/org.bluez.ThermometerWatcher.5
-man_MANS += doc/org.bluez.ChannelSounding1.5
+man_MANS += doc/org.bluez.ChannelSounding1.5 \
+	    doc/org.bluez.CSDistance1.5
 endif
 manual_pages += doc/bluetoothd.8
 manual_pages += doc/hci.7 doc/mgmt.7 doc/l2cap.7 doc/rfcomm.7 doc/sco.7 \
@@ -446,7 +447,8 @@ manual_pages += doc/org.bluez.Telephony.5 doc/org.bluez.Call.5
 manual_pages += doc/org.bluez.ThermometerManager.5 \
 		doc/org.bluez.Thermometer.5 \
 		doc/org.bluez.ThermometerWatcher.5
-manual_pages += doc/org.bluez.ChannelSounding1.5
+manual_pages += doc/org.bluez.ChannelSounding1.5 \
+	        doc/org.bluez.CSDistance1.5
 
 EXTRA_DIST += src/genbuiltin src/bluetooth.conf \
 			src/main.conf profiles/network/network.conf \
@@ -535,6 +537,9 @@ EXTRA_DIST += doc/org.bluez.ThermometerManager.rst \
 	      doc/org.bluez.Thermometer.rst \
 	      doc/org.bluez.ThermometerWatcher.rst
 
+EXTRA_DIST += doc/org.bluez.ChannelSounding1.rst \
+	      doc/org.bluez.CSDistance1.rst
+
 EXTRA_DIST += doc/pics-opp.txt doc/pixit-opp.txt \
 		doc/pts-opp.txt
 
diff --git a/doc/org.bluez.CSDistance1.rst b/doc/org.bluez.CSDistance1.rst
new file mode 100644
index 000000000..6ee70596e
--- /dev/null
+++ b/doc/org.bluez.CSDistance1.rst
@@ -0,0 +1,36 @@
+======================
+org.bluez.CSDistance1
+======================
+
+-----------------------------------------
+BlueZ D-Bus CSDistance API documentation
+-----------------------------------------
+
+:Version: BlueZ
+:Date: July 2026
+:Manual section: 5
+:Manual group: Linux System Administration
+
+Interface
+=========
+
+:Service:	org.bluez
+:Interface:	org.bluez.CSDistance1
+:Object path:	[variable prefix]/{hci0,hci1,...}/dev_XX_XX_XX_XX_XX_XX
+
+Properties
+----------
+
+double DistanceMeters [readonly]
+`````````````````````````````````
+
+Estimated distance to the remote device, in meters, as last computed
+from Channel Sounding measurement data.
+
+Providers from **org.bluez.CSDistanceProvider(5)** compute
+this value from the raw procedure data reported via the **ProcedureData**
+signal on **org.bluez.ChannelSounding1(5)**, and report it back to
+**bluetoothd(8)** for reflection here.
+
+This property emits ``PropertiesChanged`` whenever a new estimate is
+reported.
--