logging: kconfig: Remove legacy SYS_LOG symbols

Replaced by the new CONFIG_LOG system.

Also remove the "Logging Options" menu and turn the LOG symbol into a
'menuconfig', with prompt "Logging", which appears in the top menu. LOG
and its dependent symbols make up all of the logging Kconfig symbols
now.

Piggyback some minor cleanup.

Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>

subsys/logging/Kconfig

@@ -3,120 +3,15 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 #
-menu "Logging Options"
 
-config SYS_LOG
+menuconfig LOG
-	bool "Enable Logging"
+	bool "Logging"
-	depends on PRINTK
-	help
-	  Global switch for logging, when turned off log calls will not be
-	  executed.
-
-config SYS_LOG_SHOW_TAGS
-	bool "Prepend level tags to logs"
-	depends on SYS_LOG
-	default y
-	help
-	  Prefixes all log lines with an identifier to the log level submitted in
-	  the C code.
-
-config SYS_LOG_SHOW_COLOR
-	bool "Use colored logs"
-	depends on SYS_LOG
-	help
-	  Use color in the logs. This requires an ANSI capable terminal.
-
-config SYS_LOG_DEFAULT_LEVEL
-	int "Default log level"
-	depends on SYS_LOG
-	default 0
-	range 0 4
-	help
-	  Sets log level for modules which don't specify it explicitly. When
-	  set to 0 it means log wont be activated for those modules.
-	  Levels are:
-	  0 OFF, do not write by default
-	  1 ERROR, default to only write SYS_LOG_ERR
-	  2 WARNING, default to write SYS_LOG_WRN in addition to previous level
-	  3 INFO, default to write SYS_LOG_INF in addition to previous levels
-	  4 DEBUG, default to write SYS_LOG_DBG in addition to previous levels
-
-config SYS_LOG_OVERRIDE_LEVEL
-	int "Override lowest log level"
-	depends on SYS_LOG
-	default 0
-	range 0 4
-	help
-	  Forces a minimum log level for all modules. Modules use their
-	  specified level if it is greater than this option, otherwise they use
-	  the level specified by this option instead of their default or
-	  whatever was manually set.
-	  Levels are:
-	  0 OFF, do not override
-	  1 ERROR, override to write SYS_LOG_ERR
-	  2 WARNING, override to write SYS_LOG_WRN in addition to previous level
-	  3 INFO, override to write SYS_LOG_INF in addition to previous levels
-	  4 DEBUG, override to write SYS_LOG_DBG in addition to previous levels
-
-config SYS_LOG_EXT_HOOK
-	bool "Use external hook function for logging"
-	depends on SYS_LOG
-	help
-	  Use external hook function for logging.
-
-config SYS_LOG_BACKEND_NET
-	bool "Networking syslog backend"
-	depends on SYS_LOG && NETWORKING
-	select SYS_LOG_EXT_HOOK
-	select NET_CONTEXT_NET_PKT_POOL
-	help
-	  Send syslog messages to network server.
-	  See RFC 5424 (syslog protocol) and RFC 5426 (syslog over UDP)
-	  specifications for details.
-
-if SYS_LOG_BACKEND_NET
-
-config SYS_LOG_BACKEND_NET_SERVER
-	string "Syslog server IP address"
-	help
-	  This can be either IPv4 or IPv6 address.
-	  Server listen UDP port number can be configured here too.
-	  Following syntax is supported:
-	  192.0.2.1:514
-	  192.0.2.42
-	  [2001:db8::1]:514
-	  [2001:db8::2]
-	  2001:db::42
-
-config SYS_LOG_BACKEND_NET_MAX_BUF
-	int "How many network buffers to allocate for sending messages"
-	range 3 256
-	default 3
-	help
-	  Each syslog message will occupy one network buffer.
-
-config SYS_LOG_BACKEND_NET_MAX_BUF_SIZE
-	int "Max syslog message size"
-	range 64 1180
-	default 256
-	help
-	  As each syslog message needs to fit to UDP packet, set this value
-	  so that messages are not truncated.
-	  The RFC 5426 recommends that for IPv4 the size is 480 octets and for
-	  IPv6 the size is 1180 octets. As each buffer will use RAM, the value
-	  should be selected so that typical messages will fit the buffer.
-	  The total allocated memory will be
-	  SYS_LOG_BACKEND_NET_MAX_BUF * SYS_LOG_BACKEND_NET_MAX_BUF_SIZE
-
-endif
-
-config LOG
-	bool "Enable Logger"
 	help
 	  Global switch for the logger, when turned off log calls will not be
 	  compiled in.
 
 if LOG
+
 config LOG_RUNTIME_FILTERING
 	bool "Enable runtime reconfiguration of the logger"
 	help
@@ -384,7 +279,7 @@ config LOG_BACKEND_RTT_MESSAGE_SIZE
 	help
 	  This option defines maximum message size transferable to up-buffer.
 
-endif #LOG_BACKEND_RTT_MODE_DROP
+endif # LOG_BACKEND_RTT_MODE_DROP
 
 if LOG_BACKEND_RTT_MODE_BLOCK
 
@@ -412,7 +307,7 @@ config LOG_BACKEND_RTT_RETRY_DELAY_MS
 	  case of heavy traffic data can be lost and it may be necessary to
 	  increase delay or number of retries.
 
-endif #LOG_BACKEND_RTT_MODE_BLOCK
+endif # LOG_BACKEND_RTT_MODE_BLOCK
 
 config LOG_BACKEND_RTT_BUFFER
 	int "Buffer number used for logger output."
@@ -456,14 +351,13 @@ config LOG_BACKEND_XTENSA_SIM
 	help
 	  Enable backend in xtensa simulator
 
-if LOG_BACKEND_XTENSA_SIM
 config LOG_BACKEND_XTENSA_OUTPUT_BUFFER_SIZE
 	int "Size of the output buffer"
 	default 16
+	depends on LOG_BACKEND_XTENSA_SIM
 	help
 	  Buffer is used by log_output module for preparing output data (e.g.
 	  string formatting).
-endif
 
 config LOG_BACKEND_NET
 	bool "Enable networking backend"
@@ -528,5 +422,4 @@ config LOG_BACKEND_FORMAT_TIMESTAMP
 	help
 	  When enabled timestamp is formatted to hh:mm:ss:ms,us.
 
-endif
+endif # LOG
-endmenu