shell: kernel_service: reorg the commands

Split the `kernel_service.c` into multiple subcommand files,
each file would register with the main `kernel` cmd based on
the dependencies in Kconfig/CMakeLists.txt.

This greatly reduces the number of precompiler directives.

Change-Id: Ideed0f3a84445bcb4fa6efef40a95f149f81b909
Signed-off-by: Yong Cong Sin <ycsin@meta.com>
Signed-off-by: Yong Cong Sin <yongcong.sin@gmail.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/zephyr/+/5874115
Tested-by: Tristan Honscheid <honscheid@google.com>
Reviewed-by: Fabio Baltieri <fabiobaltieri@google.com>
Commit-Queue: Tristan Honscheid <honscheid@google.com>

subsys/shell/modules/CMakeLists.txt

@@ -1,9 +1,9 @@
 # SPDX-License-Identifier: Apache-2.0
 
-zephyr_sources_ifdef(
- CONFIG_KERNEL_SHELL
- kernel_service.c
- )
+add_subdirectory_ifdef(CONFIG_KERNEL_SHELL
+ kernel_service
+)
+
 zephyr_sources_ifdef(
  CONFIG_DEVICE_SHELL
  device_service.c

subsys/shell/modules/Kconfig

@@ -3,29 +3,6 @@
 # Copyright (c) 2016 Intel Corporation
 # SPDX-License-Identifier: Apache-2.0
 
-config KERNEL_SHELL
- bool "Kernel shell"
- default y if !SHELL_MINIMAL
- imply INIT_STACKS
- imply THREAD_MONITOR
- imply THREAD_NAME
- imply THREAD_STACK_INFO
- help
- This shell provides access to basic kernel data like version, uptime
- and other useful information.
-
-config KERNEL_SHELL_REBOOT_DELAY
- int "Delay between reception of shell reboot command and reboot (ms)"
- depends on KERNEL_SHELL
- depends on REBOOT
- default 0
- help
- This delay allows time for the shell to successfully echo the reboot
- command input before the reboot abruptly terminates it. This can help
- external systems that interact with the shell and require the reboot
- command's echo to successfully complete to synchronise with the
- device.
-
 config DEVICE_SHELL
  bool "Device shell"
  default y if !SHELL_MINIMAL
@@ -45,3 +22,5 @@ config DEVMEM_SHELL
  select POSIX_C_LIB_EXT
  help
  This shell command provides read/write access to physical memory.
+
+rsource "kernel_service/Kconfig"