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Diffstat (limited to 'Documentation/devicetree/bindings/memory-controllers/ingenic,jz4780-nemc.txt')
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diff --git a/Documentation/devicetree/bindings/memory-controllers/ingenic,jz4780-nemc.txt b/Documentation/devicetree/bindings/memory-controllers/ingenic,jz4780-nemc.txt deleted file mode 100644 index 59b8dcc118ee..000000000000 --- a/Documentation/devicetree/bindings/memory-controllers/ingenic,jz4780-nemc.txt +++ /dev/null @@ -1,76 +0,0 @@ -* Ingenic JZ4780 NAND/external memory controller (NEMC) - -This file documents the device tree bindings for the NEMC external memory -controller in Ingenic JZ4780 - -Required properties: -- compatible: Should be set to one of: - "ingenic,jz4740-nemc" (JZ4740) - "ingenic,jz4780-nemc" (JZ4780) -- reg: Should specify the NEMC controller registers location and length. -- clocks: Clock for the NEMC controller. -- #address-cells: Must be set to 2. -- #size-cells: Must be set to 1. -- ranges: A set of ranges for each bank describing the physical memory layout. - Each should specify the following 4 integer values: - - <cs number> 0 <physical address of mapping> <size of mapping> - -Each child of the NEMC node describes a device connected to the NEMC. - -Required child node properties: -- reg: Should contain at least one register specifier, given in the following - format: - - <cs number> <offset> <size> - - Multiple registers can be specified across multiple banks. This is needed, - for example, for packaged NAND devices with multiple dies. Such devices - should be grouped into a single node. - -Optional child node properties: -- ingenic,nemc-bus-width: Specifies the bus width in bits. Defaults to 8 bits. -- ingenic,nemc-tAS: Address setup time in nanoseconds. -- ingenic,nemc-tAH: Address hold time in nanoseconds. -- ingenic,nemc-tBP: Burst pitch time in nanoseconds. -- ingenic,nemc-tAW: Access wait time in nanoseconds. -- ingenic,nemc-tSTRV: Static memory recovery time in nanoseconds. - -If a child node references multiple banks in its "reg" property, the same value -for all optional parameters will be configured for all banks. If any optional -parameters are omitted, they will be left unchanged from whatever they are -configured to when the NEMC device is probed (which may be the reset value as -given in the hardware reference manual, or a value configured by the boot -loader). - -Example (NEMC node with a NAND child device attached at CS1): - -nemc: nemc@13410000 { - compatible = "ingenic,jz4780-nemc"; - reg = <0x13410000 0x10000>; - - #address-cells = <2>; - #size-cells = <1>; - - ranges = <1 0 0x1b000000 0x1000000 - 2 0 0x1a000000 0x1000000 - 3 0 0x19000000 0x1000000 - 4 0 0x18000000 0x1000000 - 5 0 0x17000000 0x1000000 - 6 0 0x16000000 0x1000000>; - - clocks = <&cgu JZ4780_CLK_NEMC>; - - nand: nand@1 { - compatible = "ingenic,jz4780-nand"; - reg = <1 0 0x1000000>; - - ingenic,nemc-tAS = <10>; - ingenic,nemc-tAH = <5>; - ingenic,nemc-tBP = <10>; - ingenic,nemc-tAW = <15>; - ingenic,nemc-tSTRV = <100>; - - ... - }; -}; |