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

    Required properties:





     - device_type : has to be "rom"

     - device_type : has to be "rom"

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

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

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

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

       (which corresponds to the MTD physmap mapping driver).

       corresponds to the MTD physmap mapping driver).

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

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

       the device.

       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 :

    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

     - 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'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

       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

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

       representing the partition names.

       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:

   Example:





 	flash@ff000000 {

 	flash@ff000000 {

 		device_type = "rom";

 		device_type = "rom";

 		compatible = "direct-mapped";

 		compatible = "direct-mapped";

 		regs = <ff000000 01000000>;

 		probe-type = "CFI";

 		reg = <ff000000 01000000>;

 		bank-width = <4>;

 		bank-width = <4>;

 		partitions = <00000000 00f80000

 		partitions = <00000000 00f80000

 			      00f80000 00080001>;

 			      00f80000 00080001>;