[POWERPC] Document the global utilities node define and example
Document the global utilities node define and example.
Signed-off-by: Roy Zang <tie-fei.zang@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/Documentation/powerpc/booting-without-of.txt b/Documentation/powerpc/booting-without-of.txt
index c169299..06141cb 100644
--- a/Documentation/powerpc/booting-without-of.txt
+++ b/Documentation/powerpc/booting-without-of.txt
@@ -51,6 +51,7 @@
h) Board Control and Status (BCSR)
i) Freescale QUICC Engine module (QE)
g) Flash chip nodes
+ k) Global Utilities Block
VII - Specifying interrupt information for devices
1) interrupts property
@@ -1790,6 +1791,33 @@
partition-names = "fs\0firmware";
};
+ k) Global Utilities Block
+
+ The global utilities block controls power management, I/O device
+ enabling, power-on-reset configuration monitoring, general-purpose
+ I/O signal configuration, alternate function selection for multiplexed
+ signals, and clock control.
+
+ Required properties:
+
+ - compatible : Should define the compatible device type for
+ global-utilities.
+ - reg : Offset and length of the register set for the device.
+
+ Recommended properties:
+
+ - fsl,has-rstcr : Indicates that the global utilities register set
+ contains a functioning "reset control register" (i.e. the board
+ is wired to reset upon setting the HRESET_REQ bit in this register).
+
+ Example:
+
+ global-utilities@e0000 { /* global utilities block */
+ compatible = "fsl,mpc8548-guts";
+ reg = <e0000 1000>;
+ fsl,has-rstcr;
+ };
+
More devices will be defined as this spec matures.
VII - Specifying interrupt information for devices