airoha: fix Kconfig dependency issue with PM Domain driver

The AIROHA_CPU_PM_DOMAIN option was added inside the MediaTek PM Domains
menu, which depends on ARCH_MEDIATEK || COMPILE_TEST. Since Airoha
platforms use ARCH_AIROHA, the menu is invisible during kernel
configuration, silently dropping AIROHA_CPU_PM_DOMAIN. This breaks
running `make kernel_menuconfig`.

Add ARCH_AIROHA to the menu dependency so that this option and its
dependencies (PM_GENERIC_DOMAINS, PM_GENERIC_DOMAINS_OF) remain
enabled on Airoha targets.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>

diff --git a/target/linux/airoha/patches-6.18/221-01-pmdomain-mediatek-allow-Airoha-platform-to-access-PM-Domains-menu.patch b/target/linux/airoha/patches-6.18/221-01-pmdomain-mediatek-allow-Airoha-platform-to-access-PM-Domains-menu.patch
new file mode 100644 (file)
index 0000000..63604fe
--- /dev/null
+++ b/target/linux/airoha/patches-6.18/221-01-pmdomain-mediatek-allow-Airoha-platform-to-access-PM-Domains-menu.patch
@@ -0,0 +1,38 @@
+From 2f721ce391dcfa83b323f16c44b4c98337c8bfcd Mon Sep 17 00:00:00 2001
+From: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
+Date: Wed, 8 Jul 2026 12:51:30 +0200
+Subject: [PATCH] pmdomain: mediatek: allow Airoha platform to access the PM
+ Domains menu
+
+The AIROHA_CPU_PM_DOMAIN option was added in commit 82e703dd438b
+("pmdomain: airoha: Add Airoha CPU PM Domain support") inside the
+MediaTek PM Domains menu, which is guarded by:
+
+    depends on ARCH_MEDIATEK || COMPILE_TEST
+
+Since the Airoha platform uses ARCH_AIROHA (not ARCH_MEDIATEK), the
+entire menu is invisible during kernel configuration.  As a result,
+AIROHA_CPU_PM_DOMAIN and the options it selects (PM_GENERIC_DOMAINS,
+PM_GENERIC_DOMAINS_OF) cannot be enabled through menuconfig and are
+silently dropped by oldconfig, even when ARCH_AIROHA=y.
+
+Relax the menu dependency to also accept ARCH_AIROHA so that Airoha
+platforms can reach all PM domain options.
+
+Fixes: 82e703dd438b ("pmdomain: airoha: Add Airoha CPU PM Domain support")
+Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
+---
+ drivers/pmdomain/mediatek/Kconfig | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/drivers/pmdomain/mediatek/Kconfig
++++ b/drivers/pmdomain/mediatek/Kconfig
+@@ -1,7 +1,7 @@
+ # SPDX-License-Identifier: GPL-2.0-only
+ 
+ menu "MediaTek PM Domains"
+-      depends on ARCH_MEDIATEK || COMPILE_TEST
++      depends on ARCH_MEDIATEK || ARCH_AIROHA || COMPILE_TEST
+ 
+ config MTK_SCPSYS
+       bool "MediaTek SCPSYS Support"