Thread (8 messages) 8 messages, 3 authors, 2007-09-07

Re: Document and implement an improved flash device binding

From: Segher Boessenkool <hidden>
Date: 2007-09-03 10:24:09

+   j) CFI or JEDEC memory-mapped NOR flash

     Flash chips (Memory Technology Devices) are often used for solid 
state
     file systems on embedded devices.
Well, almost everything has a NOR flash on it, not just
embedded boards ;-)
+     - bank-width : Width (in bytes) of the flash bank.  Equal to the
+       device width times the number of interleaved chips.
+     - device-width : (optional) Width of a single flash chip.  If
+       omitted, assumed to be equal to 'bank-width'.
Let's have bank-width optional instead, it's more natural
that way for the common case of just one chip.  Or, you can
say that either is optional.
+	flash@ff000000 {
+		compatible = "amd,am29lv128ml", "cfi-flash";
+		reg = <ff000000 01000000>;
+		bank-width = <4>;
This is an 8/16-bit part, you need a device-width ;-)

Need #address-cells here for the child nodes:
+		fs@0 {
+			reg = <0 f80000>;
+		};
[big snip]
+					OpenBIOS@0 {
This show immediately why node name = partition name won't
work out.  You're not supposed to start a node name with a
capital like this.


Segher
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