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Commit 173935f3 authored by Vitaly Wool's avatar Vitaly Wool Committed by Paul Mackerras
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[POWERPC] Update MTD OF documentation 



This updates the Documentation/powerpc part of the MTD OF
implementation with the new field probe-type. Its support has already
been implemented in MTD part (drivers/mtd/maps/physmap_of.c).

Signed-off-by: default avatarVitaly Wool <vwool@ru.mvista.com>
Acked-by: default avatarSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 3f245e2a

Documentation/powerpc/booting-without-of.txt

+11 −8
Original line number Diff line number Diff line
@@ -1703,29 +1703,32 @@ platforms are moved over to use the flattened-device-tree model. 
    Required properties:



     - device_type : has to be "rom"

     - compatible : Should specify what this ROM device is compatible with

       (i.e. "onenand"). Currently, this is most likely to be "direct-mapped"

       (which corresponds to the MTD physmap mapping driver).

     - regs : Offset and length of the register set (or memory mapping) for

     - compatible : Should specify what this flash device is compatible with.

       Currently, this is most likely to be "direct-mapped" (which

       corresponds to the MTD physmap mapping driver).

     - reg : Offset and length of the register set (or memory mapping) for

       the device.

     - bank-width : Width of the flash data bus in bytes. Required

       for the NOR flashes (compatible == "direct-mapped" and others) ONLY.



    Recommended properties :



     - bank-width : Width of the flash data bus in bytes. Required

       for the NOR flashes (compatible == "direct-mapped" and others) ONLY.

     - partitions : Several pairs of 32-bit values where the first value is

       partition's offset from the start of the device and the second one is

       partition size in bytes with LSB used to signify a read only

       partititon (so, the parition size should always be an even number).

       partition (so, the parition size should always be an even number).

     - partition-names : The list of concatenated zero terminated strings

       representing the partition names.

     - probe-type : The type of probe which should be done for the chip

       (JEDEC vs CFI actually). Valid ONLY for NOR flashes.



   Example:



 	flash@ff000000 {

 		device_type = "rom";

 		compatible = "direct-mapped";

 		regs = <ff000000 01000000>;

 		probe-type = "CFI";

 		reg = <ff000000 01000000>;

 		bank-width = <4>;

 		partitions = <00000000 00f80000

 			      00f80000 00080001>;