Segher Boessenkool wrote:
>> + - chip-delay : may specify a delay value in milliseconds.
>
> Delay for what? The binding should say. "chip-delay" is a bit
> too generic name as well, it could be more descriptive perhaps.
The chip-delay property defines an appropriate maximum delay
time (tR) required for read operations if the R/B pin is not
connected. It's used as shown below:
+ /* Note: NAND support needs to be enabled in U-Boot */
+ [EMAIL PROTECTED],0 {
+ #address-cells = <0>;
+ #size-cells = <0>;
+ compatible = "fsl,upm-nand";
+ reg = <3 0x0 0x800>;
+ fsl,upm-addr-offset = <0x10>;
+ fsl,upm-cmd-offset = <0x08>;
+ chip-delay = <25>; // in micro-seconds
+
+ [EMAIL PROTECTED] {
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ [EMAIL PROTECTED] {
+ label = "fs";
+ reg = <0x00000000 0x01000000>;
+ };
+ };
+ };
+ };
+
> Shouldn't this be a property of the NAND device anyway, not the
> NAND controller?
Strictly speaking, it's a property of the NAND device. Therefore it
should be inside the node [EMAIL PROTECTED], I thhink:
+ [EMAIL PROTECTED] {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ chip-delay = <25>; // in micro-seconds
+
+ [EMAIL PROTECTED] {
+ label = "fs";
+ reg = <0x00000000 0x01000000>;
+ };
+ };
Where should that be documented?
Wolfgang.
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