doc: mpsl: fem: add simple_gpio support for the nRF54L Series devices

The Simple GPIO Front-End Module is supported on the nRF54L Series
devices. This commit updates doc to mention it.

Signed-off-by: Andrzej Kuros <[email protected]>

Author: ankuns

doc/nrf/app_dev/device_guides/fem/fem_simple_gpio.rst

@@ -7,7 +7,7 @@ Enabling support for front-end modules using Simple GPIO interface
    :local:
    :depth: 2
 
-You can use the Skyworks range extenders with nRF52 and nRF53 Series devices.
+You can use the Skyworks range extenders with nRF52, nRF53 and nRF54L Series devices.
 SKY66112-11 is one of many FEM devices that support the 2-pin PA/LNA interface.
 You can use SKY66112-11 as an example on how to create bindings for different devices that support the 2-pin PA/LNA interface.
 
@@ -67,6 +67,22 @@ To use the Simple GPIO implementation of FEM with SKY66112-11, complete the foll
    .. note::
        This step is not needed when testing with the :ref:`direct_test_mode` or :ref:`radio_test` samples on nRF53 Series devices.
 
+#. On nRF54L Series devices, make sure the GPIO pins of the SoC selected to control ``ctx-gpios`` and ``crx-gpios`` support GPIOTE.
+   For example, on the nRF54L15 device, use pins belonging to GPIO P1 or GPIO P0 only.
+   You cannot use the GPIO P2 pins, because there is no related GPIOTE peripheral.
+   It is recommended to use the GPIO pins that belong to the PERI Power Domain of the nRF54L device.
+   For example, on the nRF54L15, these are pins belonging to GPIO P1.
+   Using pins belonging to Low Power Domain (GPIO P0 on nRF54L15) is supported but requires more DPPI and PPIB channels of the SoC.
+   Ensure that the following devicetree instances are enabled (have ``status = "okay"``):
+
+   * ``dppic10``
+   * ``dppic20``
+   * ``dppic30``
+   * ``ppib11``
+   * ``ppib21``
+   * ``ppib22``
+   * ``ppib30``
+
 Optional FEM properties for simple GPIO
 ***************************************
 

doc/nrf/app_dev/device_guides/fem/index.rst

@@ -26,7 +26,7 @@ Zephyr and the |NCS| provides support for developing applications with the follo
      - nRF52, nRF53, nRF54L
    * - SKY66112-11
      - Simple GPIO
-     - nRF52, nRF53
+     - nRF52, nRF53, nF54L
 
 The following hardware platforms with :term:`Front-End Module (FEM)` are supported by the |NCS|:
 

doc/nrf/releases_and_maturity/releases/release-notes-changelog.rst

@@ -118,6 +118,7 @@ Developing with Front-End Modules
 
   * The temperature compensation feature for the nRF2220 Front-End Module.
   * Support for the nRF21540 Front-End Module in GPIO/SPI mode for nRF54L Series devices.
+  * Support for the Simple GPIO Front-End Module for nRF54L Series devices.
 
 Developing with custom boards
 =============================