drivers: stepper: adi_tmc: cmake reorg

reorganize CMakeLists for TMC5xxx support subsequent to the changes.

Signed-off-by: Dipak Shetty <shetty.dipak@gmx.com>

Author: dipakgmx

drivers/stepper/adi_tmc/CMakeLists.txt

@@ -5,7 +5,9 @@ zephyr_library()
 zephyr_library_property(ALLOW_EMPTY TRUE)
 
 zephyr_library_sources_ifdef(CONFIG_STEPPER_ADI_TMC2209 tmc22xx.c)
-zephyr_library_sources_ifdef(CONFIG_STEPPER_ADI_TMC50XX tmc50xx.c)
-add_subdirectory_ifdef(CONFIG_STEPPER_ADI_TMC51XX tmc51xx)
+
+if(CONFIG_STEPPER_ADI_TMC51XX OR CONFIG_STEPPER_ADI_TMC50XX)
+    add_subdirectory(tmc5xxx)
+endif()
 
 add_subdirectory_ifdef(CONFIG_STEPPER_ADI_TMC bus)

drivers/stepper/adi_tmc/tmc51xx/CMakeLists.txt

@@ -0,0 +1,13 @@
+# SPDX-FileCopyrightText: Copyright (c) 2025 Dipak Shetty
+# SPDX-License-Identifier: Apache-2.0
+
+zephyr_library_sources(adi_tmc5xxx_core.c)
+
+# Common bus implementation sources
+zephyr_library_sources_ifdef(CONFIG_STEPPER_ADI_TMC_SPI tmc5xxx_spi.c)
+zephyr_library_sources_ifdef(CONFIG_STEPPER_ADI_TMC_UART tmc5xxx_uart.c)
+
+# Device-specific implementations
+zephyr_library_sources_ifdef(CONFIG_STEPPER_ADI_TMC50XX tmc50xx.c)
+zephyr_library_sources_ifdef(CONFIG_STEPPER_ADI_TMC51XX tmc51xx.c)
+