diff --git a/doc/board/xilinx/zynq.rst b/doc/board/xilinx/zynq.rst
index 438912f..76d67bd 100644
--- a/doc/board/xilinx/zynq.rst
+++ b/doc/board/xilinx/zynq.rst
@@ -83,7 +83,7 @@
 ---------------
 
 - Added basic board configurations support.
-- Added zynq u-boot bsp code - arch/arm/mach-zynq
+- Added zynq U-Boot bsp code - arch/arm/mach-zynq
 - Added zynq boards named - zc70x, zed, microzed, zc770_xm010/xm011/xm012/xm013
 - Added zynq drivers:
 
diff --git a/doc/board/xilinx/zynqmp-r5.rst b/doc/board/xilinx/zynqmp-r5.rst
index 2cd368b..266d07d 100644
--- a/doc/board/xilinx/zynqmp-r5.rst
+++ b/doc/board/xilinx/zynqmp-r5.rst
@@ -26,7 +26,7 @@
 Notes
 ^^^^^
 
-Output fragment is u-boot.
+Output fragment is U-Boot.
 
 Loading
 -------
@@ -38,7 +38,7 @@
 ^^^^^^^
 
 The first way is to use Xilinx FSBL (First stage
-bootloader) to load u-boot and start it. The following bif can be used for boot
+bootloader) to load U-Boot and start it. The following bif can be used for boot
 image generation via Xilinx bootgen utility::
 
 
diff --git a/doc/imx/mkimage/imximage.txt b/doc/imx/mkimage/imximage.txt
index f2cf23c..fa4e486 100644
--- a/doc/imx/mkimage/imximage.txt
+++ b/doc/imx/mkimage/imximage.txt
@@ -213,7 +213,7 @@
 	Device Boot	 Start	       End	Blocks	 Id  System
 /dev/mmcblk0p1		     3		16	112455	 83  Linux
 
-I have set 100MB, leaving the first 2 sectors free. I will copy u-boot
+I have set 100MB, leaving the first 2 sectors free. I will copy U-Boot
 there.
 
 8. Write the partition table and exit.
diff --git a/doc/usage/environment.rst b/doc/usage/environment.rst
index c6439dd..c57b717 100644
--- a/doc/usage/environment.rst
+++ b/doc/usage/environment.rst
@@ -216,7 +216,7 @@
     0xffffffffffffffff (64-bit machines) then
     the fdt will not be copied at all on boot.  For this
     to work it must reside in writable memory, have
-    sufficient padding on the end of it for u-boot to
+    sufficient padding on the end of it for U-Boot to
     add the information it needs into it, and the memory
     must be accessible by the kernel. This usage is strongly discouraged
     however as it also stops U-Boot from ensuring the device tree starting
diff --git a/doc/usage/semihosting.rst b/doc/usage/semihosting.rst
index 6a280b4..9303a63 100644
--- a/doc/usage/semihosting.rst
+++ b/doc/usage/semihosting.rst
@@ -23,7 +23,7 @@
 There are two main ARM virtual Fixed Virtual Platform (FVP) models,
 `Versatile Express (VE) FVP and BASE FVP
 <http://www.arm.com/products/tools/models/fast-models/foundation-model.php>`_.
-The initial vexpress64 u-boot board created here runs on the VE virtual
+The initial vexpress64 U-Boot board created here runs on the VE virtual
 platform using the license-free Foundation_v8 simulator. Fortunately,
 the Foundation_v8 simulator also supports the BASE_FVP model which
 companies can purchase licenses for and contain much more functionality.