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author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-23 13:07:49 -0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-23 13:07:49 -0400 |
commit | a7c367b95a9d8e65e0f0e7da31f700a556794efb (patch) | |
tree | 5b1bb202801e29e3237381aa7aad5aa288378d5b /Documentation/powerpc | |
parent | 15f964bed054821d6d940d3752508c5f96a9ffd3 (diff) | |
parent | e1070211f7327a1f197d535aa886f721a241c32f (diff) |
Merge git://git.infradead.org/mtd-2.6
* git://git.infradead.org/mtd-2.6: (58 commits)
mtd: jedec_probe: add PSD4256G6V id
mtd: OneNand support for Nomadik 8815 SoC (on NHK8815 board)
mtd: nand: driver for Nomadik 8815 SoC (on NHK8815 board)
m25p80: Add Spansion S25FL129P serial flashes
jffs2: Use SLAB_HWCACHE_ALIGN for jffs2_raw_{dirent,inode} slabs
mtd: sh_flctl: register sh_flctl using platform_driver_probe()
mtd: nand: txx9ndfmc: transfer 512 byte at a time if possible
mtd: nand: fix tmio_nand ecc correction
mtd: nand: add __nand_correct_data helper function
mtd: cfi_cmdset_0002: add 0xFF intolerance for M29W128G
mtd: inftl: fix fold chain block number
mtd: jedec: fix compilation problem with I28F640C3B definition
mtd: nand: fix ECC Correction bug for SMC ordering for NDFC driver
mtd: ofpart: Check availability of reg property instead of name property
driver/Makefile: Initialize "mtd" and "spi" before "net"
mtd: omap: adding DMA mode support in nand prefetch/post-write
mtd: omap: add support for nand prefetch-read and post-write
mtd: add nand support for w90p910 (v2)
mtd: maps: add mtd-ram support to physmap_of
mtd: pxa3xx_nand: add single-bit error corrections reporting
...
Diffstat (limited to 'Documentation/powerpc')
-rw-r--r-- | Documentation/powerpc/dts-bindings/mtd-physmap.txt | 42 |
1 files changed, 26 insertions, 16 deletions
diff --git a/Documentation/powerpc/dts-bindings/mtd-physmap.txt b/Documentation/powerpc/dts-bindings/mtd-physmap.txt index 667c9bde8699..80152cb567d9 100644 --- a/Documentation/powerpc/dts-bindings/mtd-physmap.txt +++ b/Documentation/powerpc/dts-bindings/mtd-physmap.txt | |||
@@ -1,18 +1,19 @@ | |||
1 | CFI or JEDEC memory-mapped NOR flash | 1 | CFI or JEDEC memory-mapped NOR flash, MTD-RAM (NVRAM...) |
2 | 2 | ||
3 | Flash chips (Memory Technology Devices) are often used for solid state | 3 | Flash chips (Memory Technology Devices) are often used for solid state |
4 | file systems on embedded devices. | 4 | file systems on embedded devices. |
5 | 5 | ||
6 | - compatible : should contain the specific model of flash chip(s) | 6 | - compatible : should contain the specific model of mtd chip(s) |
7 | used, if known, followed by either "cfi-flash" or "jedec-flash" | 7 | used, if known, followed by either "cfi-flash", "jedec-flash" |
8 | - reg : Address range(s) of the flash chip(s) | 8 | or "mtd-ram". |
9 | - reg : Address range(s) of the mtd chip(s) | ||
9 | It's possible to (optionally) define multiple "reg" tuples so that | 10 | It's possible to (optionally) define multiple "reg" tuples so that |
10 | non-identical NOR chips can be described in one flash node. | 11 | non-identical chips can be described in one node. |
11 | - bank-width : Width (in bytes) of the flash bank. Equal to the | 12 | - bank-width : Width (in bytes) of the bank. Equal to the |
12 | device width times the number of interleaved chips. | 13 | device width times the number of interleaved chips. |
13 | - device-width : (optional) Width of a single flash chip. If | 14 | - device-width : (optional) Width of a single mtd chip. If |
14 | omitted, assumed to be equal to 'bank-width'. | 15 | omitted, assumed to be equal to 'bank-width'. |
15 | - #address-cells, #size-cells : Must be present if the flash has | 16 | - #address-cells, #size-cells : Must be present if the device has |
16 | sub-nodes representing partitions (see below). In this case | 17 | sub-nodes representing partitions (see below). In this case |
17 | both #address-cells and #size-cells must be equal to 1. | 18 | both #address-cells and #size-cells must be equal to 1. |
18 | 19 | ||
@@ -22,24 +23,24 @@ are defined: | |||
22 | - vendor-id : Contains the flash chip's vendor id (1 byte). | 23 | - vendor-id : Contains the flash chip's vendor id (1 byte). |
23 | - device-id : Contains the flash chip's device id (1 byte). | 24 | - device-id : Contains the flash chip's device id (1 byte). |
24 | 25 | ||
25 | In addition to the information on the flash bank itself, the | 26 | In addition to the information on the mtd bank itself, the |
26 | device tree may optionally contain additional information | 27 | device tree may optionally contain additional information |
27 | describing partitions of the flash address space. This can be | 28 | describing partitions of the address space. This can be |
28 | used on platforms which have strong conventions about which | 29 | used on platforms which have strong conventions about which |
29 | portions of the flash are used for what purposes, but which don't | 30 | portions of a flash are used for what purposes, but which don't |
30 | use an on-flash partition table such as RedBoot. | 31 | use an on-flash partition table such as RedBoot. |
31 | 32 | ||
32 | Each partition is represented as a sub-node of the flash device. | 33 | Each partition is represented as a sub-node of the mtd device. |
33 | Each node's name represents the name of the corresponding | 34 | Each node's name represents the name of the corresponding |
34 | partition of the flash device. | 35 | partition of the mtd device. |
35 | 36 | ||
36 | Flash partitions | 37 | Flash partitions |
37 | - reg : The partition's offset and size within the flash bank. | 38 | - reg : The partition's offset and size within the mtd bank. |
38 | - label : (optional) The label / name for this flash partition. | 39 | - label : (optional) The label / name for this partition. |
39 | If omitted, the label is taken from the node name (excluding | 40 | If omitted, the label is taken from the node name (excluding |
40 | the unit address). | 41 | the unit address). |
41 | - read-only : (optional) This parameter, if present, is a hint to | 42 | - read-only : (optional) This parameter, if present, is a hint to |
42 | Linux that this flash partition should only be mounted | 43 | Linux that this partition should only be mounted |
43 | read-only. This is usually used for flash partitions | 44 | read-only. This is usually used for flash partitions |
44 | containing early-boot firmware images or data which should not | 45 | containing early-boot firmware images or data which should not |
45 | be clobbered. | 46 | be clobbered. |
@@ -78,3 +79,12 @@ Here an example with multiple "reg" tuples: | |||
78 | reg = <0 0x04000000>; | 79 | reg = <0 0x04000000>; |
79 | }; | 80 | }; |
80 | }; | 81 | }; |
82 | |||
83 | An example using SRAM: | ||
84 | |||
85 | sram@2,0 { | ||
86 | compatible = "samsung,k6f1616u6a", "mtd-ram"; | ||
87 | reg = <2 0 0x00200000>; | ||
88 | bank-width = <2>; | ||
89 | }; | ||
90 | |||