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mtd: physmap_of: Add non-obsolete map_rom probe

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Previously, the only way to map a NOR device as a simple ROM was to
use the obsolete "direct-mapped" compatible binding (which further
requires device_type = "nor" and probe-type = "NOR" properties).

This patch adds an "mtd-rom" compatible binding to the "map_rom"
probe type.

Signed-off-by: Aaron Sierra <asierra@xes-inc.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This commit is contained in:
Aaron Sierra 2014-09-17 13:08:28 -05:00 committed by Brian Norris
parent 9b07a8d1ab
commit e5bffb59cf
2 changed files with 6 additions and 2 deletions
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4
Documentation/devicetree/bindings/mtd/mtd-physmap.txt
View File

@ -4,8 +4,8 @@ Flash chips (Memory Technology Devices) are often used for solid state
file systems on embedded devices. file systems on embedded devices.
- compatible : should contain the specific model of mtd chip(s) - compatible : should contain the specific model of mtd chip(s)
used, if known, followed by either "cfi-flash", "jedec-flash" used, if known, followed by either "cfi-flash", "jedec-flash",
or "mtd-ram". "mtd-ram" or "mtd-rom".
- reg : Address range(s) of the mtd chip(s) - reg : Address range(s) of the mtd chip(s)
It's possible to (optionally) define multiple "reg" tuples so that It's possible to (optionally) define multiple "reg" tuples so that
non-identical chips can be described in one node. non-identical chips can be described in one node.

4
drivers/mtd/maps/physmap_of.c
View File

@ -339,6 +339,10 @@ static struct of_device_id of_flash_match[] = {
.compatible = "mtd-ram", .compatible = "mtd-ram",
.data = (void *)"map_ram", .data = (void *)"map_ram",
}, },
{
.compatible = "mtd-rom",
.data = (void *)"map_rom",
},
{ {
.type = "rom", .type = "rom",
.compatible = "direct-mapped" .compatible = "direct-mapped"