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authorVitaly Wool <vitalywool@gmail.com>2006-12-19 18:44:25 +0300
committerPaul Mackerras <paulus@samba.org>2006-12-20 08:37:48 +0300
commit173935f3619ae99fef0cea1dbe4de9c83d6c8e72 (patch)
tree581b9f4fb84cddbd1cd999c3e893f2473d912cc8 /Documentation/powerpc
parent3f245e2a1eaf603cf9cf4820eb5dd8c5637bc71a (diff)
downloadlinux-173935f3619ae99fef0cea1dbe4de9c83d6c8e72.tar.xz
[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: Vitaly Wool <vwool@ru.mvista.com> Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'Documentation/powerpc')
-rw-r--r--Documentation/powerpc/booting-without-of.txt19
1 files changed, 11 insertions, 8 deletions
diff --git a/Documentation/powerpc/booting-without-of.txt b/Documentation/powerpc/booting-without-of.txt
index b3bd36668db3..33994271cb3b 100644
--- a/Documentation/powerpc/booting-without-of.txt
+++ b/Documentation/powerpc/booting-without-of.txt
@@ -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>;