tree-wide: use Device*T*ree spelling

We used both, in fact "Devicetree" was more common. But we have a general rule
that we capitalize all words in names and also we have a DeviceTree=
configuration setting, which we cannot change. If we use two different
spelllings, this will make it harder for people to use the correct one in
config files. So use the "DeviceTree" spelling everywhere.

src/boot/efi/UEFI_SECURITY.md

@@ -54,7 +54,7 @@ libraries (such as OpenSSL or gnu-efi) are linked, embedded, or used.
 
 ## Additional Resources
 BLS Type #1 entries allow the user to load two types of additional resources that can affect the system
-before `ExitBootServices()` has been called — kernel command line arguments and Devicetree blobs — that are
+before `ExitBootServices()` has been called — kernel command line arguments and DeviceTree blobs — that are
 not validated before use, as they do not carry signatures. For this reason, when SecureBoot is enabled,
 loading these resources is automatically disabled. There is no override for this security mechanism, neither
 at build time nor at runtime. Note that initrds are also not verified in BLS Type #1 configurations, for
@@ -62,7 +62,7 @@ compatibility with how SecureBoot has been traditionally handled on Linux-based
 only load them after `ExitBootServices()` has been called.
 
 Another mechanism is supported by `systemd-boot` and `systemd-stub` to add additional payloads to the boot
-process: "addons". Addons are PE signed binaries that can carry kernel command line arguments or Devicetree
+process: "addons". Addons are PE signed binaries that can carry kernel command line arguments or DeviceTree
 blobs (more payload types might be added in the future).
 In contrast to the user-specified additions in the Type #1 case
 described above, these addons are loaded through the UEFI image loading protocol, and thus are subject to

src/boot/efi/devicetree.c

@@ -178,8 +178,8 @@ bool firmware_devicetree_exists(void) {
         return !!find_configuration_table(MAKE_GUID_PTR(EFI_DTB_TABLE));
 }
 
-/* This function checks if the firmware provided Devicetree
- * and a UKI provided Devicetree contain the same first entry
+/* This function checks if the firmware provided DeviceTree
+ * and a UKI provided DeviceTree contain the same first entry
  * on their respective "compatible" fields (which usually defines
  * the actual device model). More specifically, given the FW/UKI
  * "compatible" property pair:

src/boot/measure.c

@@ -98,7 +98,7 @@ static int help(int argc, char *argv[], void *userdata) {
                "     --initrd=PATH       Path to initrd image file              %7$s .initrd\n"
                "     --ucode=PATH        Path to microcode image file           %7$s .ucode\n"
                "     --splash=PATH       Path to splash bitmap file             %7$s .splash\n"
-               "     --dtb=PATH          Path to Devicetree file                %7$s .dtb\n"
+               "     --dtb=PATH          Path to DeviceTree file                %7$s .dtb\n"
                "     --uname=PATH        Path to 'uname -r' file                %7$s .uname\n"
                "     --sbat=PATH         Path to SBAT file                      %7$s .sbat\n"
                "     --pcrpkey=PATH      Path to public key for PCR signatures  %7$s .pcrpkey\n"

src/fundamental/tpm2-pcr.h

@@ -47,7 +47,7 @@ enum {
 /* The tag used for EV_EVENT_TAG event log records covering the boot loader config */
 #define LOADER_CONF_EVENT_TAG_ID UINT32_C(0xf5bc582a)
 
-/* The tag used for EV_EVENT_TAG event log records covering Devicetree blobs */
+/* The tag used for EV_EVENT_TAG event log records covering DeviceTree blobs */
 #define DEVICETREE_ADDON_EVENT_TAG_ID UINT32_C(0x6c46f751)
 
 /* The tag used for EV_EVENT_TAG event log records covering initrd addons */

src/hostname/hostnamed.c

@@ -502,7 +502,7 @@ try_devicetree:
                 return NULL;
         }
 
-        /* Note that the Devicetree specification uses the very same vocabulary
+        /* Note that the DeviceTree specification uses the very same vocabulary
          * of chassis types as we do, hence we do not need to translate these types:
          *
          * https://github.com/devicetree-org/devicetree-specification/blob/master/source/chapter3-devicenodes.rst */

src/udev/udev-builtin-net_id.c

@@ -924,7 +924,7 @@ static int names_devicetree(sd_device *dev, const char *prefix, EventMode mode)
                 char str[ALTIFNAMSIZ];
                 if (snprintf_ok(str, sizeof str, "%sd%u", prefix, i))
                         udev_builtin_add_property(dev, mode, "ID_NET_NAME_ONBOARD", str);
-                log_device_debug(dev, "Devicetree identifier: alias_index=%u %s \"%s\"",
+                log_device_debug(dev, "DeviceTree identifier: alias_index=%u %s \"%s\"",
                                  i, special_glyph(SPECIAL_GLYPH_ARROW_RIGHT), str + strlen(prefix));
                 return 0;
         }