[PATCHv4] clk: davinci: add COMPILE_TEST support

[Rosen Penev <rosenp@gmail.com>]

Add a driver-scoped Kconfig symbol for the DaVinci clock drivers so
they can be built through COMPILE_TEST without selecting the ARM
DaVinci platform symbols.

Keep the existing ARM platform behavior by defaulting the new symbol
from ARCH_DAVINCI, and use it for the davinci clock Makefile entries.
ARCH_DAVINCI_DA850 is the only remaining DaVinci platform symbol, so a
single COMMON_CLK_DAVINCI symbol suffices; the whole directory builds
together just fine.

Assisted-by: Codex:GPT-5.5
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Reviewed-by: Brian Masney <bmasney@redhat.com>
---
 v4: rebase
 v3: remove pointless symbols for single user.
 v2: use COMMON_CLK prefix.
 drivers/clk/Kconfig          |  1 +
 drivers/clk/Makefile         |  2 +-
 drivers/clk/davinci/Kconfig  | 10 ++++++++++
 drivers/clk/davinci/Makefile |  8 +++-----
 4 files changed, 15 insertions(+), 6 deletions(-)
 create mode 100644 drivers/clk/davinci/Kconfig

diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index 36b4801ee46e..c2edbd3393b5 100644
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -517,6 +517,7 @@ source "drivers/clk/analogbits/Kconfig"
 source "drivers/clk/aspeed/Kconfig"
 source "drivers/clk/bcm/Kconfig"
 source "drivers/clk/cix/Kconfig"
+source "drivers/clk/davinci/Kconfig"
 source "drivers/clk/eswin/Kconfig"
 source "drivers/clk/hisilicon/Kconfig"
 source "drivers/clk/imgtec/Kconfig"
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index 64095c805e6b..69a09b7d0097 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -132,7 +132,7 @@ obj-$(CONFIG_ARC_PLAT_AXS10X)		+= axs10x/
 obj-y					+= bcm/
 obj-$(CONFIG_ARCH_BERLIN)		+= berlin/
 obj-y					+= cix/
-obj-$(CONFIG_ARCH_DAVINCI)		+= davinci/
+obj-$(CONFIG_COMMON_CLK_DAVINCI)	+= davinci/
 obj-$(CONFIG_COMMON_CLK_ESWIN)		+= eswin/
 obj-$(CONFIG_COMMON_CLK_HISI)		+= hisilicon/
 obj-y					+= imgtec/
diff --git a/drivers/clk/davinci/Kconfig b/drivers/clk/davinci/Kconfig
new file mode 100644
index 000000000000..7b8c518ef6b4
--- /dev/null
+++ b/drivers/clk/davinci/Kconfig
@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config COMMON_CLK_DAVINCI
+	bool "Clock drivers for TI DaVinci SoCs"
+	depends on ARCH_DAVINCI || COMPILE_TEST
+	depends on HAS_IOMEM
+	select REGMAP_MMIO
+	select RESET_CONTROLLER
+	default ARCH_DAVINCI
+	help
+	  Support for the clock controllers found on TI DaVinci SoCs.
diff --git a/drivers/clk/davinci/Makefile b/drivers/clk/davinci/Makefile
index f9d5c9a392e4..7cb030b5e046 100644
--- a/drivers/clk/davinci/Makefile
+++ b/drivers/clk/davinci/Makefile
@@ -1,11 +1,9 @@
 # SPDX-License-Identifier: GPL-2.0
 
-ifeq ($(CONFIG_COMMON_CLK), y)
-obj-$(CONFIG_ARCH_DAVINCI_DA8XX)	+= da8xx-cfgchip.o
+obj-y += da8xx-cfgchip.o
 
 obj-y += pll.o
-obj-$(CONFIG_ARCH_DAVINCI_DA850)	+= pll-da850.o
+obj-y += pll-da850.o
 
 obj-y += psc.o
-obj-$(CONFIG_ARCH_DAVINCI_DA850)	+= psc-da850.o
-endif
+obj-y += psc-da850.o
-- 
2.55.0