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98 lines
2.9 KiB
98 lines
2.9 KiB
Device tree bindings for NOR flash connect to TI GPMC |
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NOR flash connected to the TI GPMC (found on OMAP boards) are represented as |
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child nodes of the GPMC controller with a name of "nor". |
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All timing relevant properties as well as generic GPMC child properties are |
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explained in a separate documents. Please refer to |
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Documentation/devicetree/bindings/memory-controllers/omap-gpmc.txt |
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Required properties: |
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- bank-width: Width of NOR flash in bytes. GPMC supports 8-bit and |
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16-bit devices and so must be either 1 or 2 bytes. |
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- compatible: Documentation/devicetree/bindings/mtd/mtd-physmap.yaml |
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- gpmc,cs-on-ns: Chip-select assertion time |
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- gpmc,cs-rd-off-ns: Chip-select de-assertion time for reads |
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- gpmc,cs-wr-off-ns: Chip-select de-assertion time for writes |
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- gpmc,oe-on-ns: Output-enable assertion time |
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- gpmc,oe-off-ns: Output-enable de-assertion time |
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- gpmc,we-on-ns Write-enable assertion time |
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- gpmc,we-off-ns: Write-enable de-assertion time |
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- gpmc,access-ns: Start cycle to first data capture (read access) |
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- gpmc,rd-cycle-ns: Total read cycle time |
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- gpmc,wr-cycle-ns: Total write cycle time |
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- linux,mtd-name: Documentation/devicetree/bindings/mtd/mtd-physmap.yaml |
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- reg: Chip-select, base address (relative to chip-select) |
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and size of NOR flash. Note that base address will be |
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typically 0 as this is the start of the chip-select. |
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Optional properties: |
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- gpmc,XXX Additional GPMC timings and settings parameters. See |
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Documentation/devicetree/bindings/memory-controllers/omap-gpmc.txt |
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Optional properties for partition table parsing: |
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- #address-cells: should be set to 1 |
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- #size-cells: should be set to 1 |
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Example: |
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gpmc: gpmc@6e000000 { |
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compatible = "ti,omap3430-gpmc", "simple-bus"; |
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ti,hwmods = "gpmc"; |
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reg = <0x6e000000 0x1000>; |
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interrupts = <20>; |
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gpmc,num-cs = <8>; |
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gpmc,num-waitpins = <4>; |
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#address-cells = <2>; |
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#size-cells = <1>; |
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ranges = <0 0 0x10000000 0x08000000>; |
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nor@0,0 { |
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compatible = "cfi-flash"; |
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linux,mtd-name= "intel,pf48f6000m0y1be"; |
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#address-cells = <1>; |
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#size-cells = <1>; |
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reg = <0 0 0x08000000>; |
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bank-width = <2>; |
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gpmc,mux-add-data; |
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gpmc,cs-on-ns = <0>; |
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gpmc,cs-rd-off-ns = <186>; |
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gpmc,cs-wr-off-ns = <186>; |
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gpmc,adv-on-ns = <12>; |
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gpmc,adv-rd-off-ns = <48>; |
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gpmc,adv-wr-off-ns = <48>; |
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gpmc,oe-on-ns = <54>; |
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gpmc,oe-off-ns = <168>; |
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gpmc,we-on-ns = <54>; |
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gpmc,we-off-ns = <168>; |
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gpmc,rd-cycle-ns = <186>; |
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gpmc,wr-cycle-ns = <186>; |
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gpmc,access-ns = <114>; |
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gpmc,page-burst-access-ns = <6>; |
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gpmc,bus-turnaround-ns = <12>; |
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gpmc,cycle2cycle-delay-ns = <18>; |
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gpmc,wr-data-mux-bus-ns = <90>; |
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gpmc,wr-access-ns = <186>; |
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gpmc,cycle2cycle-samecsen; |
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gpmc,cycle2cycle-diffcsen; |
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partition@0 { |
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label = "bootloader-nor"; |
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reg = <0 0x40000>; |
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}; |
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partition@40000 { |
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label = "params-nor"; |
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reg = <0x40000 0x40000>; |
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}; |
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partition@80000 { |
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label = "kernel-nor"; |
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reg = <0x80000 0x200000>; |
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}; |
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partition@280000 { |
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label = "filesystem-nor"; |
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reg = <0x240000 0x7d80000>; |
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}; |
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}; |
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};
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