cmd: eeprom: Hide eeprom layout versioning behind a Kconfig option

Add a new Kconfig option EEPROM_LAYOUT_VERSIONS, and hide eeprom
layout versionsing code behind it. Only print the relevant help in
'eeprom' command usage if this option is enabled.

Enable this new option for cm_fx6_defconfig and cm_t43_defconfig.
These are the only boards using EEPROM layout versioning.

Signed-off-by: Marek Behún <kabel@kernel.org>

cmd/Kconfig

@@ -803,9 +803,16 @@ config CMD_EEPROM_LAYOUT
 			types of eeprom fields. Can be used for defining
 			custom layouts.
 
+config EEPROM_LAYOUT_VERSIONS
+	bool "Support specifying eeprom layout version"
+	depends on CMD_EEPROM_LAYOUT
+	help
+	  Support specifying eeprom layout version in the 'eeprom' command
+	  via the -l option.
+
 config EEPROM_LAYOUT_HELP_STRING
 	  string "Tells user what layout names are supported"
-	  depends on CMD_EEPROM_LAYOUT
+	  depends on EEPROM_LAYOUT_VERSIONS
 	  default "<not defined>"
 	  help
 	    Help printed with the LAYOUT VERSIONS part of the 'eeprom'

cmd/eeprom.c

@@ -252,10 +252,12 @@ static int parse_i2c_bus_addr(int *i2c_bus, ulong *i2c_addr, int argc,
 
 #ifdef CONFIG_CMD_EEPROM_LAYOUT
 
+#ifdef CONFIG_EEPROM_LAYOUT_VERSIONS
 __weak int eeprom_parse_layout_version(char *str)
 {
 	return LAYOUT_VERSION_UNRECOGNIZED;
 }
+#endif
 
 static unsigned char eeprom_buf[CONFIG_SYS_EEPROM_SIZE];
 
@@ -359,7 +361,7 @@ int do_eeprom(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 	if (action == EEPROM_ACTION_INVALID)
 		return CMD_RET_USAGE;
 
-#ifdef CONFIG_CMD_EEPROM_LAYOUT
+#ifdef CONFIG_EEPROM_LAYOUT_VERSIONS
 	if (action == EEPROM_PRINT || action == EEPROM_UPDATE) {
 		if (!strcmp(argv[index], "-l")) {
 			NEXT_PARAM(argc, index);
@@ -415,6 +417,12 @@ int do_eeprom(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 				      field_name, field_value, addr, off, cnt);
 }
 
+#ifdef CONFIG_EEPROM_LAYOUT_VERSIONS
+#define EEPROM_LAYOUT_SPEC	"[-l <layout_version>] "
+#else
+#define EEPROM_LAYOUT_SPEC	""
+#endif
+
 U_BOOT_CMD(
 	eeprom,	8,	1,	do_eeprom,
 	"EEPROM sub-system",
@@ -423,16 +431,18 @@ U_BOOT_CMD(
 	"       - read/write `cnt' bytes from `devaddr` EEPROM at offset `off'"
 #ifdef CONFIG_CMD_EEPROM_LAYOUT
 	"\n"
-	"eeprom print [-l <layout_version>] [[bus] devaddr]\n"
+	"eeprom print " EEPROM_LAYOUT_SPEC "[[bus] devaddr]\n"
 	"       - Print layout fields and their data in human readable format\n"
-	"eeprom update [-l <layout_version>] [[bus] devaddr] field_name field_value\n"
+	"eeprom update " EEPROM_LAYOUT_SPEC "[[bus] devaddr] field_name field_value\n"
 	"       - Update a specific eeprom field with new data.\n"
-	"         The new data must be written in the same human readable format as shown by the print command.\n"
-	"\n"
+	"         The new data must be written in the same human readable format as shown by the print command."
+#ifdef CONFIG_EEPROM_LAYOUT_VERSIONS
+	"\n\n"
 	"LAYOUT VERSIONS\n"
 	"The -l option can be used to force the command to interpret the EEPROM data using the chosen layout.\n"
 	"If the -l option is omitted, the command will auto detect the layout based on the data in the EEPROM.\n"
 	"The values which can be provided with the -l option are:\n"
 	CONFIG_EEPROM_LAYOUT_HELP_STRING"\n"
 #endif
+#endif
 );

configs/cm_fx6_defconfig

@@ -46,6 +46,7 @@ CONFIG_SYS_MAXARGS=32
 CONFIG_CMD_GREPENV=y
 CONFIG_CMD_EEPROM=y
 CONFIG_CMD_EEPROM_LAYOUT=y
+CONFIG_EEPROM_LAYOUT_VERSIONS=y
 CONFIG_EEPROM_LAYOUT_HELP_STRING="v2, v3"
 CONFIG_SYS_I2C_EEPROM_BUS=2
 CONFIG_SYS_EEPROM_PAGE_WRITE_BITS=4

configs/cm_t43_defconfig

@@ -50,6 +50,7 @@ CONFIG_SYS_PROMPT="CM-T43 # "
 CONFIG_CMD_ASKENV=y
 CONFIG_CMD_EEPROM=y
 CONFIG_CMD_EEPROM_LAYOUT=y
+CONFIG_EEPROM_LAYOUT_VERSIONS=y
 CONFIG_EEPROM_LAYOUT_HELP_STRING="v2, v3"
 CONFIG_SYS_EEPROM_PAGE_WRITE_BITS=4
 CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS=5