boards: shields: nrf7002ek: align with nrf700x split interface

Add variant for the coex interface and move the coex interface out
if the wifi/control interface variants.

Signed-off-by: Bjarki Arge Andreasen <[email protected]>

Author: bjarki-andreasen

boards/shields/nrf7002ek/Kconfig.shield

@@ -9,3 +9,6 @@ config SHIELD_NRF7002EK_NRF7001
 
 config SHIELD_NRF7002EK_NRF7000
 	def_bool $(shields_list_contains,nrf7002ek_nrf7000)
+
+config SHIELD_NRF7002EK_COEX
+	def_bool $(shields_list_contains,nrf7002ek_coex)

boards/shields/nrf7002ek/doc/index.rst

@@ -47,24 +47,25 @@ SR Co-existence
 ###############
 
 The nRF7002 EK supports SR co-existence provided the host board supports it. The SR co-existence
-pins are connected to the host board's GPIO pins.
+pins are connected to the host board's GPIO pins. The interface is selected by setting
+``--shield nrf7002ek_coex`` when invoking ``west build``.
 
 Two Kconfig options are available to enable SR co-existence:
 
-- :kconfig:option:`CONFIG_NRF70_SR_COEX`: Enables SR co-existence.
+- :kconfig:option:`CONFIG_NRF70_SR_COEX`: Enables SR co-existence driver.
 - :kconfig:option:`CONFIG_NRF70_SR_COEX_RF_SWITCH`: Control SR side RF switch.
 
 Shield Variants
 ###############
 
-The nRF7002 EK is available in three variants:
+The nRF7002 EK is available in four variants:
 
 - ``nrf7002ek``: The default variant.
 - ``nrf7002ek_nrf7001``: Variant for the nRF7001 SoC or nRF7002 SoC emulating nRF7001
-   that supports only 2.4GHz Wi-Fi.
+  that supports only 2.4GHz Wi-Fi.
 - ``nrf7002ek_nrf7000``: Variant for the nRF7000 SoC or nRF7002 SoC emulating nRF7000
-   that supports only 2.4GHz Wi-Fi.
-
+  that supports only 2.4GHz Wi-Fi.
+- ``nrf7002ek_coex``: Variant for the SR co-existence interface
 
 References
 **********

boards/shields/nrf7002ek/nrf7002ek_coex.overlay

@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	nrf70: coex {
+		compatible = "nordic,nrf7002-coex";
+		status = "okay";
+
+		/* D2 */
+		status0-gpios = <&arduino_header 8 GPIO_ACTIVE_HIGH>;
+		/* D3 */
+		req-gpios = <&arduino_header 9 GPIO_ACTIVE_HIGH>;
+		/* D4 */
+		grant-gpios = <&arduino_header 10 (GPIO_PULL_DOWN | GPIO_ACTIVE_LOW)>;
+		/* D6 */
+		swctrl1-gpios = <&arduino_header 12 GPIO_ACTIVE_HIGH>;
+	};
+};

boards/shields/nrf7002ek/nrf7002ek_common.dtsi

@@ -12,15 +12,8 @@ iovdd-ctrl-gpios = <&arduino_header 6 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>;
 bucken-gpios = <&arduino_header 7 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>;
 /* D7 */
 host-irq-gpios = <&arduino_header 13 GPIO_ACTIVE_HIGH>;
+
 /* Short-range (SR) co-existence */
-/* D2 */
-status0-gpios = <&arduino_header 8 GPIO_ACTIVE_HIGH>;
-/* D3 */
-req-gpios = <&arduino_header 9 GPIO_ACTIVE_HIGH>;
-/* D4 */
-grant-gpios = <&arduino_header 10 (GPIO_PULL_DOWN | GPIO_ACTIVE_LOW)>;
-/* D6 */
-swctrl1-gpios = <&arduino_header 12 GPIO_ACTIVE_HIGH>;
 /* D8 */
 srrf-switch-gpios = <&arduino_header 14 GPIO_ACTIVE_HIGH>;