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dt/documentation: Fix value format description 

Numeric values in dts files can be specified in decimal and hex (the latter
prefixed 0x). The current documentation is updated with this patch to prevent
confusion about what is meant with values without "0x" (previously hex, now
dec).

Signed-off-by: Roland Stigge <stigge@antcom.de>
Acked-by: Rob Landley <rob@landley.net>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Roland Stigge 2012-05-16 22:33:55 +02:00 committed by Grant Likely
parent 99fc012b93
commit 3679362355
1 changed files with 28 additions and 27 deletions
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55
Documentation/devicetree/booting-without-of.txt
View File

@ -551,12 +551,13 @@ Here is an example of a simple device-tree. In this example, an "o"
designates a node followed by the node unit name. Properties are
presented with their name followed by their content. "content"
represents an ASCII string (zero terminated) value, while <content>
represents a 32-bit hexadecimal value. The various nodes in this
example will be discussed in a later chapter. At this point, it is
only meant to give you a idea of what a device-tree looks like. I have
purposefully kept the "name" and "linux,phandle" properties which
aren't necessary in order to give you a better idea of what the tree
looks like in practice.
represents a 32-bit value, specified in decimal or hexadecimal (the
latter prefixed 0x). The various nodes in this example will be
discussed in a later chapter. At this point, it is only meant to give
you a idea of what a device-tree looks like. I have purposefully kept
the "name" and "linux,phandle" properties which aren't necessary in
order to give you a better idea of what the tree looks like in
practice.
/ o device-tree
|- name = "device-tree"
@ -576,14 +577,14 @@ looks like in practice.
| |- name = "PowerPC,970"
| |- device_type = "cpu"
| |- reg = <0>
| |- clock-frequency = <5f5e1000>
| |- clock-frequency = <0x5f5e1000>
| |- 64-bit
| |- linux,phandle = <2>
|
o memory@0
| |- name = "memory"
| |- device_type = "memory"
| |- reg = <00000000 00000000 00000000 20000000>
| |- reg = <0x00000000 0x00000000 0x00000000 0x20000000>
| |- linux,phandle = <3>
|
o chosen
@ -1010,8 +1011,8 @@ compatibility.
#size-cells = <1>;
#interrupt-cells = <2>;
device_type = "soc";
ranges = <00000000 e0000000 00100000>
reg = <e0000000 00003000>;
ranges = <0x00000000 0xe0000000 0x00100000>
reg = <0xe0000000 0x00003000>;
bus-frequency = <0>;
}
@ -1085,16 +1086,16 @@ supported currently at the toplevel.
* terminated string
*/
property2 = <1234abcd>; /* define a property containing a
property2 = <0x1234abcd>; /* define a property containing a
* numerical 32-bit value (hexadecimal)
*/
property3 = <12345678 12345678 deadbeef>;
property3 = <0x12345678 0x12345678 0xdeadbeef>;
/* define a property containing 3
* numerical 32-bit values (cells) in
* hexadecimal
*/
property4 = [0a 0b 0c 0d de ea ad be ef];
property4 = [0x0a 0x0b 0x0c 0x0d 0xde 0xea 0xad 0xbe 0xef];
/* define a property whose content is
* an arbitrary array of bytes
*/
@ -1350,10 +1351,10 @@ Appendix A - Sample SOC node for MPC8540
model = "TSEC";
compatible = "gianfar", "simple-bus";
reg = <0x24000 0x1000>;
local-mac-address = [ 00 E0 0C 00 73 00 ];
interrupts = <29 2 30 2 34 2>;
local-mac-address = [ 0x00 0xE0 0x0C 0x00 0x73 0x00 ];
interrupts = <0x29 2 0x30 2 0x34 2>;
phy-handle = <&phy0>;
sleep = <&pmc 00000080>;
sleep = <&pmc 0x00000080>;
ranges;
mdio@24520 {
@ -1385,10 +1386,10 @@ Appendix A - Sample SOC node for MPC8540
model = "TSEC";
compatible = "gianfar";
reg = <0x25000 0x1000>;
local-mac-address = [ 00 E0 0C 00 73 01 ];
interrupts = <13 2 14 2 18 2>;
local-mac-address = [ 0x00 0xE0 0x0C 0x00 0x73 0x01 ];
interrupts = <0x13 2 0x14 2 0x18 2>;
phy-handle = <&phy1>;
sleep = <&pmc 00000040>;
sleep = <&pmc 0x00000040>;
};
ethernet@26000 {
@ -1396,17 +1397,17 @@ Appendix A - Sample SOC node for MPC8540
model = "FEC";
compatible = "gianfar";
reg = <0x26000 0x1000>;
local-mac-address = [ 00 E0 0C 00 73 02 ];
interrupts = <41 2>;
local-mac-address = [ 0x00 0xE0 0x0C 0x00 0x73 0x02 ];
interrupts = <0x41 2>;
phy-handle = <&phy3>;
sleep = <&pmc 00000020>;
sleep = <&pmc 0x00000020>;
};
serial@4500 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "fsl,mpc8540-duart", "simple-bus";
sleep = <&pmc 00000002>;
sleep = <&pmc 0x00000002>;
ranges;
serial@4500 {
@ -1414,7 +1415,7 @@ Appendix A - Sample SOC node for MPC8540
compatible = "ns16550";
reg = <0x4500 0x100>;
clock-frequency = <0>;
interrupts = <42 2>;
interrupts = <0x42 2>;
};
serial@4600 {
@ -1422,7 +1423,7 @@ Appendix A - Sample SOC node for MPC8540
compatible = "ns16550";
reg = <0x4600 0x100>;
clock-frequency = <0>;
interrupts = <42 2>;
interrupts = <0x42 2>;
};
};
@ -1436,11 +1437,11 @@ Appendix A - Sample SOC node for MPC8540
};
i2c@3000 {
interrupts = <43 2>;
interrupts = <0x43 2>;
reg = <0x3000 0x100>;
compatible = "fsl-i2c";
dfsrr;
sleep = <&pmc 00000004>;
sleep = <&pmc 0x00000004>;
};
pmc: power@e0070 {