diff --git a/Documentation/platforms/xtensa/esp32/boards/esp32-devkitc/index.rst b/Documentation/platforms/xtensa/esp32/boards/esp32-devkitc/index.rst
index f34a30c5c20..8aaba387e09 100644
--- a/Documentation/platforms/xtensa/esp32/boards/esp32-devkitc/index.rst
+++ b/Documentation/platforms/xtensa/esp32/boards/esp32-devkitc/index.rst
@@ -931,6 +931,19 @@ You can set an alarm, check its progress and receive a notification after it exp
     Alarm 0 is active with 10 seconds to expiration
     nsh> alarm_daemon: alarm 0 received
 
+sdm
+---
+
+This configuration enables the support for the Sigma-Delta Modulation (SDM) driver
+which can be used for LED dimming, simple dac with help of an low pass filter either
+active or passive and so on. ESP32 supports 1 group of SDM up to 8 channels with
+any GPIO up to user. This configuration enables 1 channel of SDM on GPIO5. You can test
+DAC feature with following command with connecting simple LED on GPIO5
+
+    nsh> dac -d 100 -s 10 test
+
+After this command you will see LED will light up in different brightness.
+
 smp
 ---
 
diff --git a/Documentation/platforms/xtensa/esp32s2/boards/esp32s2-saola-1/index.rst b/Documentation/platforms/xtensa/esp32s2/boards/esp32s2-saola-1/index.rst
index 8cc501253db..d6e84fee29f 100644
--- a/Documentation/platforms/xtensa/esp32s2/boards/esp32s2-saola-1/index.rst
+++ b/Documentation/platforms/xtensa/esp32s2/boards/esp32s2-saola-1/index.rst
@@ -430,6 +430,19 @@ You can set an alarm, check its progress and receive a notification after it exp
     Alarm 0 is active with 10 seconds to expiration
     nsh> alarm_daemon: alarm 0 received
 
+sdm
+---
+
+This configuration enables the support for the Sigma-Delta Modulation (SDM) driver
+which can be used for LED dimming, simple dac with help of an low pass filter either
+active or passive and so on. ESP32-S2 supports 1 group of SDM up to 8 channels with
+any GPIO up to user. This configuration enables 1 channel of SDM on GPIO5. You can test
+DAC feature with following command with connecting simple LED on GPIO5
+
+    nsh> dac -d 100 -s 10 test
+
+After this command you will see LED will light up in different brightness.
+
 timer
 -----
 
diff --git a/Documentation/platforms/xtensa/esp32s3/boards/esp32s3-devkit/index.rst b/Documentation/platforms/xtensa/esp32s3/boards/esp32s3-devkit/index.rst
index 0d9dee348a7..c4459b7d9de 100644
--- a/Documentation/platforms/xtensa/esp32s3/boards/esp32s3-devkit/index.rst
+++ b/Documentation/platforms/xtensa/esp32s3/boards/esp32s3-devkit/index.rst
@@ -657,6 +657,19 @@ You can set an alarm, check its progress and receive a notification after it exp
     Alarm 0 is active with 10 seconds to expiration
     nsh> alarm_daemon: alarm 0 received
 
+sdm
+---
+
+This configuration enables the support for the Sigma-Delta Modulation (SDM) driver
+which can be used for LED dimming, simple dac with help of an low pass filter either
+active or passive and so on. ESP32-S3 supports 1 group of SDM up to 8 channels with
+any GPIO up to user. This configuration enables 1 channel of SDM on GPIO5. You can test
+DAC feature with following command with connecting simple LED on GPIO5
+
+    nsh> dac -d 100 -s 10 test
+
+After this command you will see LED will light up in different brightness.
+
 sdmmc
 -----