feat(linux): Update docs for AM62L Audio

Update the MCASP instance and pins used for Tx and Rx.
Update Additional Information

Signed-off-by: Rishikesh Donadkar <[email protected]>

Author: Rishikesh-D

source/linux/Foundational_Components/Kernel/Kernel_Drivers/Audio.rst

@@ -790,6 +790,56 @@ Board-specific instructions
     <../../../How_to_Guides/Target/How_to_playback_audio_over_HDMI.html>`__
     guide.
 
+.. ifconfig:: CONFIG_part_variant in ('AM62LX')
+
+    .. rubric:: SK-AM62L
+       :name: sk-am62l
+
+    | The board uses **tlv320aic3106 codec** connected through **McASP0
+      [AXR0 for playback, AXR1 for Capture]** for audio. The board features
+      one TRRS 3.5mm jack, that can be used for simultaneous stereo playback
+      and mono recording. Same McASP0 lines are also muxed to the **sii9022
+      HDMI bridge**.
+
+    .. rubric:: Kernel config
+       :name: kernel-config-9
+
+    .. code-block:: text
+
+        Device Drivers  --->
+          Sound card support  --->
+            Advanced Linux Sound Architecture  --->
+              ALSA for SoC audio support  --->
+                Audio support for Texas Instruments SoCs  --->
+                  <*> Multichannel Audio Serial Port (McASP) support
+                CODEC drivers  --->
+                  <*> Texas Instruments TLV320AIC3x CODECs
+                <*>   ASoC Simple sound card support
+
+    .. rubric:: User space
+       :name: user-space-9
+
+    The hardware defaults are correct for audio playback, the routing is OK
+    and the volume is 'adequate' but in case the volume is not correct:
+
+    .. code-block:: text
+
+        amixer sset PCM 90%
+
+    For recording using the mic pin on the 3.5mm jack, you will need to unmute
+    MIC3R on the codec, and increase the capture volume:
+
+    .. code-block:: text
+
+        amixer sset 'Left PGA Mixer Mic3R' on
+        amixer sset 'Right PGA Mixer Mic3R' on
+        amixer sset PGA 90%
+
+    To switch to using HDMI for playback you can refer to the `How to playback
+    audio over HDMI
+    <../../../How_to_Guides/Target/How_to_playback_audio_over_HDMI.html>`__
+    guide.
+
 Potential issues
 ^^^^^^^^^^^^^^^^
 
@@ -864,15 +914,15 @@ Additional Information
     #. `Interfacing DRA7xx Audio to Analog Codecs
        <http://www.ti.com/lit/an/sprac09a/sprac09a.pdf>`__
 
-.. ifconfig:: CONFIG_part_family in ('J7_family', 'AM62X_family', 'AM62AX_family', 'AM62PX_family')
+.. ifconfig:: CONFIG_part_family in ('J7_family', 'AM62X_family', 'AM62AX_family', 'AM62PX_family', 'AM62LX_family')
 
     #. `Tools and Techniques for Audio Debugging
        <https://www.ti.com/lit/an/sprac10/sprac10.pdf>`__
 
 .. rubric:: Audio hardware codecs
    :name: additional-information-audio-hardware-codecs
 
-.. ifconfig:: CONFIG_part_variant in ('Gen', 'AM335X', 'AM437X', 'AM62X', 'AM62AX', 'AM62PX', 'J722S')
+.. ifconfig:: CONFIG_part_variant in ('Gen', 'AM335X', 'AM437X', 'AM62X', 'AM62AX', 'AM62PX', 'J722S', 'AM62LX')
 
     #. `TLV320AIC31 - Low-Power Stereo CODEC with HP
        Amplifier <http://www.ti.com/lit/ds/symlink/tlv320aic31.pdf>`__