forked from Minki/linux
c98be0c96d
Fixed multiple spelling errors. Acked-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Carlos E. Garcia <carlos@cgarcia.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
99 lines
2.9 KiB
Plaintext
99 lines
2.9 KiB
Plaintext
Device tree bindings for NOR flash connect to TI GPMC
|
|
|
|
NOR flash connected to the TI GPMC (found on OMAP boards) are represented as
|
|
child nodes of the GPMC controller with a name of "nor".
|
|
|
|
All timing relevant properties as well as generic GPMC child properties are
|
|
explained in a separate documents. Please refer to
|
|
Documentation/devicetree/bindings/bus/ti-gpmc.txt
|
|
|
|
Required properties:
|
|
- bank-width: Width of NOR flash in bytes. GPMC supports 8-bit and
|
|
16-bit devices and so must be either 1 or 2 bytes.
|
|
- compatible: Documentation/devicetree/bindings/mtd/mtd-physmap.txt
|
|
- gpmc,cs-on-ns: Chip-select assertion time
|
|
- gpmc,cs-rd-off-ns: Chip-select de-assertion time for reads
|
|
- gpmc,cs-wr-off-ns: Chip-select de-assertion time for writes
|
|
- gpmc,oe-on-ns: Output-enable assertion time
|
|
- gpmc,oe-off-ns: Output-enable de-assertion time
|
|
- gpmc,we-on-ns Write-enable assertion time
|
|
- gpmc,we-off-ns: Write-enable de-assertion time
|
|
- gpmc,access-ns: Start cycle to first data capture (read access)
|
|
- gpmc,rd-cycle-ns: Total read cycle time
|
|
- gpmc,wr-cycle-ns: Total write cycle time
|
|
- linux,mtd-name: Documentation/devicetree/bindings/mtd/mtd-physmap.txt
|
|
- reg: Chip-select, base address (relative to chip-select)
|
|
and size of NOR flash. Note that base address will be
|
|
typically 0 as this is the start of the chip-select.
|
|
|
|
Optional properties:
|
|
- gpmc,XXX Additional GPMC timings and settings parameters. See
|
|
Documentation/devicetree/bindings/bus/ti-gpmc.txt
|
|
|
|
Optional properties for partition table parsing:
|
|
- #address-cells: should be set to 1
|
|
- #size-cells: should be set to 1
|
|
|
|
Example:
|
|
|
|
gpmc: gpmc@6e000000 {
|
|
compatible = "ti,omap3430-gpmc", "simple-bus";
|
|
ti,hwmods = "gpmc";
|
|
reg = <0x6e000000 0x1000>;
|
|
interrupts = <20>;
|
|
gpmc,num-cs = <8>;
|
|
gpmc,num-waitpins = <4>;
|
|
#address-cells = <2>;
|
|
#size-cells = <1>;
|
|
|
|
ranges = <0 0 0x10000000 0x08000000>;
|
|
|
|
nor@0,0 {
|
|
compatible = "cfi-flash";
|
|
linux,mtd-name= "intel,pf48f6000m0y1be";
|
|
#address-cells = <1>;
|
|
#size-cells = <1>;
|
|
reg = <0 0 0x08000000>;
|
|
bank-width = <2>;
|
|
|
|
gpmc,mux-add-data;
|
|
gpmc,cs-on-ns = <0>;
|
|
gpmc,cs-rd-off-ns = <186>;
|
|
gpmc,cs-wr-off-ns = <186>;
|
|
gpmc,adv-on-ns = <12>;
|
|
gpmc,adv-rd-off-ns = <48>;
|
|
gpmc,adv-wr-off-ns = <48>;
|
|
gpmc,oe-on-ns = <54>;
|
|
gpmc,oe-off-ns = <168>;
|
|
gpmc,we-on-ns = <54>;
|
|
gpmc,we-off-ns = <168>;
|
|
gpmc,rd-cycle-ns = <186>;
|
|
gpmc,wr-cycle-ns = <186>;
|
|
gpmc,access-ns = <114>;
|
|
gpmc,page-burst-access-ns = <6>;
|
|
gpmc,bus-turnaround-ns = <12>;
|
|
gpmc,cycle2cycle-delay-ns = <18>;
|
|
gpmc,wr-data-mux-bus-ns = <90>;
|
|
gpmc,wr-access-ns = <186>;
|
|
gpmc,cycle2cycle-samecsen;
|
|
gpmc,cycle2cycle-diffcsen;
|
|
|
|
partition@0 {
|
|
label = "bootloader-nor";
|
|
reg = <0 0x40000>;
|
|
};
|
|
partition@0x40000 {
|
|
label = "params-nor";
|
|
reg = <0x40000 0x40000>;
|
|
};
|
|
partition@0x80000 {
|
|
label = "kernel-nor";
|
|
reg = <0x80000 0x200000>;
|
|
};
|
|
partition@0x280000 {
|
|
label = "filesystem-nor";
|
|
reg = <0x240000 0x7d80000>;
|
|
};
|
|
};
|
|
};
|