shields: nrf2220ek: no more explicit pin-forwarder shield

The nrf2220ek_fwd is no more necessary and deprecated. Build system
picks appropriate overlay (being either a pin-forwarder or the main
fem overlay) based on content of `boards` directory.
User does not need to pass different values for `-DSHIELD` for every
core on the SoC. It is handled on the shield level and passing just
`-DSHIELD=nrf2220ek` for all cores is enough.

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

Author: ankuns

CODEOWNERS

@@ -55,7 +55,7 @@
 /boards/nordic/nrf52*                     @nrfconnect/ncs-co-boards @nrfconnect/ncs-si-bluebagel
 /boards/nordic/thingy91*                  @nrfconnect/ncs-co-boards @nrfconnect/ncs-cia
 /boards/shields/coverage_support/         @nrfconnect/ncs-low-level-test
-
+/boards/shields/nrf2220ek/                @nrfconnect/ncs-radio-sw
 /boards/shields/pca63566/doc/*.rst        @nrfconnect/ncs-doc-leads
 
 # SUIT configuration files

boards/shields/nrf2220ek/boards/nrf52833dk_nrf52833.overlay

@@ -0,0 +1,6 @@
+/* Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+
+#include "../common/arduino_compatible.overlay"

boards/shields/nrf2220ek/boards/nrf52840dk_nrf52840.overlay

@@ -0,0 +1,6 @@
+/* Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+
+#include "../common/arduino_compatible.overlay"

boards/shields/nrf2220ek/boards/nrf5340dk_nrf5340_cpuapp.overlay

@@ -0,0 +1,6 @@
+/* Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+
+#include "../common/arduino_compatible_fwd.overlay"

boards/shields/nrf2220ek/boards/nrf5340dk_nrf5340_cpunet.overlay

@@ -3,6 +3,8 @@
  * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
  */
 
+#include "../common/arduino_compatible.overlay"
+
 /* On nrf5340_cpunet the uart0 conflicts with nrf_radio_fem_twi and must be disabled. */
 &uart0 {
 	status = "disabled";

boards/shields/nrf2220ek/common/arduino_compatible.overlay

@@ -0,0 +1,29 @@
+/* Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+
+/* Pin mapping suitable for use nRF2220-EK PCA63558 with
+ * Nordic Interposer Board A PCA64172 v0.2.0.
+ * The nRF2220-EK in SLOT 2 of PCA64172.
+ */
+
+/ {
+	nrf_radio_fem: nrf2220_fem {
+		compatible = "nordic,nrf2220-fem";
+		cs-gpios = <&arduino_header 14 GPIO_ACTIVE_HIGH>;	/* D8 */
+		md-gpios = <&arduino_header 13 GPIO_ACTIVE_HIGH>;	/* D7 */
+		twi-if = <&nrf_radio_fem_twi>;
+	};
+};
+
+fem_twi: &arduino_i2c {
+	status = "okay";
+	compatible = "nordic,nrf-twim";
+
+	nrf_radio_fem_twi: nrf2220_fem_twi@36 {
+		compatible = "nordic,nrf2220-fem-twi";
+		status = "okay";
+		reg = <0x36>;
+	};
+};

boards/shields/nrf2220ek/common/arduino_compatible_fwd.overlay

@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+
+&gpio_fwd {
+	nrf2220-gpio-if {
+		gpios = <&arduino_header 14 0>,	/* cs-gpios */
+			<&arduino_header 13 0>;	/* md-gpios */
+	};
+	nrf2220-twi-if {
+		gpios = <&gpio1 2 0>,	/* TWIM_SDA */
+			<&gpio1 3 0>;	/* TWIM_SCL */
+	};
+};

boards/shields/nrf2220ek/nrf2220ek.overlay

@@ -3,27 +3,8 @@
  * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
  */
 
-/* Pin mapping suitable for use nRF2220-EK PCA63558 with
- * Nordic Interposer Board A PCA64172 v0.2.0.
- * The nRF2220-EK in SLOT 2 of PCA64172.
+/* Integration of this shield differs depending on board. The proper overlay file
+ * is provided through one of suitable overlays in the 'boards' directory.
+ * However the file here must exist here to satisfy the way the Zephyr finds
+ * a shield support.
  */
-
-/ {
-	nrf_radio_fem: nrf2220_fem {
-		compatible = "nordic,nrf2220-fem";
-		cs-gpios = <&arduino_header 14 GPIO_ACTIVE_HIGH>;	/* D8 */
-		md-gpios = <&arduino_header 13 GPIO_ACTIVE_HIGH>;	/* D7 */
-		twi-if = <&nrf_radio_fem_twi>;
-	};
-};
-
-fem_twi: &arduino_i2c {
-	status = "okay";
-	compatible = "nordic,nrf-twim";
-
-	nrf_radio_fem_twi: nrf2220_fem_twi@36 {
-		compatible = "nordic,nrf2220-fem-twi";
-		status = "okay";
-		reg = <0x36>;
-	};
-};

boards/shields/nrf2220ek/nrf2220ek_fwd.overlay

@@ -4,23 +4,8 @@
  * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
  */
 
-/* This file matches the contents of nrf2220ek.overlay and is intended to be applied to nRF5340
- * application core when nrf2220ek shield is provided to the network core's image build.
- *
- * For instance, consider an application targeted for nRF5340 application core that specifies
- * a child image targeted for nRF5340 network core, which drives the nRF2220 Front-End Module.
- * The shield overlays could be provided to the build using the following command:
- *
- * west build -p -b nrf5340dk/nrf5340/cpuapp -- -DSHIELD=nrf2220ek_fwd -D<child_image>_SHIELD=nrf2220ek
+/* The direct use of SHIELD=nrf2220_fwd is no more necessary and deprecated.
+ * Please use just -DSHIELD=nrf2220ek or -D<app_image>_SHIELD=nrf2220ek.
+ * For multi-core devices appropriate overlay for the shield will be picked
+ * by the build system automatically.
  */
-
-&gpio_fwd {
-	nrf2220-gpio-if {
-		gpios = <&arduino_header 14 0>,	/* cs-gpios */
-			<&arduino_header 13 0>;	/* md-gpios */
-	};
-	nrf2220-twi-if {
-		gpios = <&gpio1 2 0>,	/* TWIM_SDA */
-			<&gpio1 3 0>;	/* TWIM_SCL */
-	};
-};