diff options
author | Vitaly Wool <vitalywool@gmail.com> | 2006-12-19 10:44:25 -0500 |
---|---|---|
committer | Paul Mackerras <paulus@samba.org> | 2006-12-20 00:37:48 -0500 |
commit | 173935f3619ae99fef0cea1dbe4de9c83d6c8e72 (patch) | |
tree | 581b9f4fb84cddbd1cd999c3e893f2473d912cc8 /Documentation/powerpc | |
parent | 3f245e2a1eaf603cf9cf4820eb5dd8c5637bc71a (diff) |
[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.txt | 19 |
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. | |||
1703 | Required properties: | 1703 | Required properties: |
1704 | 1704 | ||
1705 | - device_type : has to be "rom" | 1705 | - device_type : has to be "rom" |
1706 | - compatible : Should specify what this ROM device is compatible with | 1706 | - compatible : Should specify what this flash device is compatible with. |
1707 | (i.e. "onenand"). Currently, this is most likely to be "direct-mapped" | 1707 | Currently, this is most likely to be "direct-mapped" (which |
1708 | (which corresponds to the MTD physmap mapping driver). | 1708 | corresponds to the MTD physmap mapping driver). |
1709 | - regs : Offset and length of the register set (or memory mapping) for | 1709 | - reg : Offset and length of the register set (or memory mapping) for |
1710 | the device. | 1710 | the device. |
1711 | - bank-width : Width of the flash data bus in bytes. Required | ||
1712 | for the NOR flashes (compatible == "direct-mapped" and others) ONLY. | ||
1711 | 1713 | ||
1712 | Recommended properties : | 1714 | Recommended properties : |
1713 | 1715 | ||
1714 | - bank-width : Width of the flash data bus in bytes. Required | ||
1715 | for the NOR flashes (compatible == "direct-mapped" and others) ONLY. | ||
1716 | - partitions : Several pairs of 32-bit values where the first value is | 1716 | - partitions : Several pairs of 32-bit values where the first value is |
1717 | partition's offset from the start of the device and the second one is | 1717 | partition's offset from the start of the device and the second one is |
1718 | partition size in bytes with LSB used to signify a read only | 1718 | partition size in bytes with LSB used to signify a read only |
1719 | partititon (so, the parition size should always be an even number). | 1719 | partition (so, the parition size should always be an even number). |
1720 | - partition-names : The list of concatenated zero terminated strings | 1720 | - partition-names : The list of concatenated zero terminated strings |
1721 | representing the partition names. | 1721 | representing the partition names. |
1722 | - probe-type : The type of probe which should be done for the chip | ||
1723 | (JEDEC vs CFI actually). Valid ONLY for NOR flashes. | ||
1722 | 1724 | ||
1723 | Example: | 1725 | Example: |
1724 | 1726 | ||
1725 | flash@ff000000 { | 1727 | flash@ff000000 { |
1726 | device_type = "rom"; | 1728 | device_type = "rom"; |
1727 | compatible = "direct-mapped"; | 1729 | compatible = "direct-mapped"; |
1728 | regs = <ff000000 01000000>; | 1730 | probe-type = "CFI"; |
1731 | reg = <ff000000 01000000>; | ||
1729 | bank-width = <4>; | 1732 | bank-width = <4>; |
1730 | partitions = <00000000 00f80000 | 1733 | partitions = <00000000 00f80000 |
1731 | 00f80000 00080001>; | 1734 | 00f80000 00080001>; |