sh: add device tree support and generic board using device tree

[cascardo/linux.git] / Documentation / devicetree / booting-without-of.txt

diff --git a/Documentation/devicetree/booting-without-of.txt b/Documentation/devicetree/booting-without-of.txt
index 04d34f6..3f1437f 100644 (file)
--- a/Documentation/devicetree/booting-without-of.txt
+++ b/Documentation/devicetree/booting-without-of.txt
@@ -16,6 +16,7 @@ Table of Contents
     2) Entry point for arch/powerpc
     3) Entry point for arch/x86
     4) Entry point for arch/mips/bmips
+    5) Entry point for arch/sh
 
   II - The DT block format
     1) Header
@@ -316,6 +317,18 @@ it with special cases.
   This convention is defined for 32-bit systems only, as there are not
   currently any 64-bit BMIPS implementations.
 
+5) Entry point for arch/sh
+--------------------------
+
+  Device-tree-compatible SH bootloaders are expected to provide the physical
+  address of the device tree blob in r4. Since legacy bootloaders did not
+  guarantee any particular initial register state, kernels built to
+  inter-operate with old bootloaders must either use a builtin DTB or
+  select a legacy board option (something other than CONFIG_SH_DEVICE_TREE)
+  that does not use device tree. Support for the latter is being phased out
+  in favor of device tree.
+
+
 II - The DT block format
 ========================