powerpc: FSL UPM NAND bindings, add read-fetch-delay property

This patch adds the binding for the property "read-fetch-delay" to the sub-nodes of the "fsl,upm-nand" compatible nodes. It will be used by a patch extending the support of the FSL UPM NAND driver for the TQM8548 modules, which do not have the R/B pin of the NAND chip connected. Furthermore it documents the missing FLASH partition bindings.

---

As soon as this new binding is accepted, I going to send the patch for the FSL UPM NAND driver to the MTD mailing list. An old version can be found here:

http://ozlabs.org/pipermail/linuxppc-dev/2008-June/057632.html

TIA.

Wolfgang.

Documentation/powerpc/dts-bindings/fsl/upm-nand.txt | 39 +++++++++++++++++---

1 file changed, 35 insertions(+), 4 deletions(-)

Index: linux-2.6-galak/Documentation/powerpc/dts-bindings/fsl/upm-nand.txt
===================================================================
@@ -1,11 +1,34 @@

Freescale Localbus UPM programmed to work with NAND flash

-Required properties:
+Properties:
- compatible : "fsl,upm-nand".
- reg : should specify localbus chip select and size used for the chip.
- fsl,upm-addr-offset : UPM pattern offset for the address latch.
- fsl,upm-cmd-offset : UPM pattern offset for the command latch. -- gpios : may specify optional GPIO connected to the Ready-Not-Busy pin. +- gpios : (optional) may specify GPIO connected to the Ready-Not-Busy + pin. +
+Each NAND flash is represented as a sub-node of the UPM node. The +nodes's name represents the name of the corresponding device.
+
+NAND flash properties:

+- compatible : (optional) not yet used.
+- read-fetch-delay : (optional) chip dependent delay for transferring
+  data from array to read regs (tR).

+
+Each partition is represented as a sub-node of the NAND flash device. +Each node's name represents the name of the corresponding partition +of the flash device.
+
+NAND flash partition properties:

+- reg : The partition's offset and size within the flash bank.
+- label : (optional) The label / name for this flash partition. If
+  omitted, the label is taken from the node name (excluding the unit
+  address).
+- read-only : (optional) This parameter, if present, is a hint to
+  Linux that this flash partition should only be mounted read-only.
+  This is usually used for flash partitions containing early-boot
+  firmware images or data which should not be clobbered.

Example:

@@ -20,9 +43,17 @@ upm@1,0 {
		#address-cells = <1>;
		#size-cells = <1>;
		compatible = "...";

+ read-fetch-delay = 25
+
+ fs@0 {
+ label = "fs";
+ reg = <0x0 0xf80000>;
+ };

- partition@0 {
- ...
+ firmware@f80000 {
+ label ="firmware";
+ reg = <0xf80000 0x80000>;

+			read-only;
		};
	};
};