[PATCH] clk: mmp: allow COMPILE_TEST builds

[Rosen Penev]

The MMP clock directory is only entered for ARCH_MMP, even though the
PXA1908 and MMP2 audio clock symbols can already be selected for
COMPILE_TEST.

Add a hidden MMP clock family gate, select it from the compile-testable MMP
clock symbols, and use that symbol for the parent Makefile descent.  Keep
ARCH_MMP as the default provider for existing platform builds.

Tested with:
make LLVM=1 ARCH=loongarch drivers/clk/mmp/

Assisted-by: Codex:GPT-5.5
Signed-off-by: Rosen Penev <rosenp@xxxxxxxxx>
---
 drivers/clk/Kconfig     | 2 ++
 drivers/clk/Makefile    | 2 +-
 drivers/clk/mmp/Kconfig | 5 +++++
 3 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index 16191b297150..cb69872401fd 100644
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -457,12 +457,14 @@ config COMMON_CLK_STM32H7
 
 config COMMON_CLK_MMP2
 	def_bool COMMON_CLK && (MACH_MMP2_DT || MACH_MMP3_DT)
+	select COMMON_CLK_MMP
 	help
 	  Support for Marvell MMP2 and MMP3 SoC clocks
 
 config COMMON_CLK_MMP2_AUDIO
         tristate "Clock driver for MMP2 Audio subsystem"
         depends on COMMON_CLK_MMP2 || COMPILE_TEST
+        select COMMON_CLK_MMP
         help
           This driver supports clocks for Audio subsystem on MMP2 SoC.
 
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index 4b2c089f46a1..8383f9f1da51 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -130,7 +130,7 @@ obj-y					+= mediatek/
 obj-$(CONFIG_ARCH_MESON)		+= meson/
 obj-y					+= microchip/
 ifeq ($(CONFIG_COMMON_CLK), y)
-obj-$(CONFIG_ARCH_MMP)			+= mmp/
+obj-$(CONFIG_COMMON_CLK_MMP)		+= mmp/
 endif
 obj-y					+= mstar/
 obj-y					+= mvebu/
diff --git a/drivers/clk/mmp/Kconfig b/drivers/clk/mmp/Kconfig
index b0d2fea3cda5..35a069034b28 100644
--- a/drivers/clk/mmp/Kconfig
+++ b/drivers/clk/mmp/Kconfig
@@ -1,10 +1,15 @@
 # SPDX-License-Identifier: GPL-2.0-only
 
+config COMMON_CLK_MMP
+	bool
+	default ARCH_MMP
+
 config COMMON_CLK_PXA1908
 	bool "Clock driver for Marvell PXA1908"
 	depends on ARCH_MMP || COMPILE_TEST
 	depends on OF
 	default y if ARCH_MMP && ARM64
+	select COMMON_CLK_MMP
 	select AUXILIARY_BUS
 	help
 	  This driver supports the Marvell PXA1908 SoC clocks.
-- 
2.55.0