log: Add a category for filesystems

Sometimes it is useful to log things related to filesystems. Add a new
category and place it at the top of one of the FAT files.

Signed-off-by: Simon Glass <sjg@chromium.org>

common/log.c

@@ -30,6 +30,7 @@ static const char *const log_cat_name[] = {
 	"acpi",
 	"boot",
 	"event",
+	"fs",
 };
 
 _Static_assert(ARRAY_SIZE(log_cat_name) == LOGC_COUNT - LOGC_NONE,

fs/fat/fat_write.c

@@ -5,6 +5,8 @@
  * R/W (V)FAT 12/16/32 filesystem implementation by Donggeun Kim
  */
 
+#define LOG_CATEGORY LOGC_FS
+
 #include <common.h>
 #include <command.h>
 #include <config.h>

include/log.h

@@ -100,6 +100,8 @@ enum log_category_t {
 	LOGC_BOOT,
 	/** @LOGC_EVENT: Related to event and event handling */
 	LOGC_EVENT,
+	/** @LOGC_FS: Related to filesystems */
+	LOGC_FS,
 	/** @LOGC_COUNT: Number of log categories */
 	LOGC_COUNT,
 	/** @LOGC_END: Sentinel value for lists of log categories */