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Commit e5bffb59 authored by Aaron Sierra's avatar Aaron Sierra Committed by Brian Norris
Browse files

mtd: physmap_of: Add non-obsolete map_rom probe 



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: default avatarAaron Sierra <asierra@xes-inc.com>
Signed-off-by: default avatarBrian Norris <computersforpeace@gmail.com>
parent 9b07a8d1

Documentation/devicetree/bindings/mtd/mtd-physmap.txt

+2 −2
Original line number Diff line number Diff line
@@ -4,8 +4,8 @@ Flash chips (Memory Technology Devices) are often used for solid state 
file systems on embedded devices.



 - compatible : should contain the specific model of mtd chip(s)

   used, if known, followed by either "cfi-flash", "jedec-flash"

   or "mtd-ram".

   used, if known, followed by either "cfi-flash", "jedec-flash",

   "mtd-ram" or "mtd-rom".

 - reg : Address range(s) of the mtd chip(s)

   It's possible to (optionally) define multiple "reg" tuples so that

   non-identical chips can be described in one node.

drivers/mtd/maps/physmap_of.c

+4 −0
Original line number Diff line number Diff line
@@ -339,6 +339,10 @@ static struct of_device_id of_flash_match[] = { 
		.compatible     = "mtd-ram",

		.data           = (void *)"map_ram",

	},

	{

		.compatible     = "mtd-rom",

		.data           = (void *)"map_rom",

	},

	{

		.type		= "rom",

		.compatible	= "direct-mapped"