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Diffstat (limited to 'Documentation/devicetree/bindings/memory-controllers/arm,pl172.txt')
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diff --git a/Documentation/devicetree/bindings/memory-controllers/arm,pl172.txt b/Documentation/devicetree/bindings/memory-controllers/arm,pl172.txt deleted file mode 100644 index 22b77ee02f58..000000000000 --- a/Documentation/devicetree/bindings/memory-controllers/arm,pl172.txt +++ /dev/null @@ -1,127 +0,0 @@ -* Device tree bindings for ARM PL172/PL175/PL176 MultiPort Memory Controller - -Required properties: - -- compatible: Must be "arm,primecell" and exactly one from - "arm,pl172", "arm,pl175" or "arm,pl176". - -- reg: Must contains offset/length value for controller. - -- #address-cells: Must be 2. The partition number has to be encoded in the - first address cell and it may accept values 0..N-1 - (N - total number of partitions). The second cell is the - offset into the partition. - -- #size-cells: Must be set to 1. - -- ranges: Must contain one or more chip select memory regions. - -- clocks: Must contain references to controller clocks. - -- clock-names: Must contain "mpmcclk" and "apb_pclk". - -- clock-ranges: Empty property indicating that child nodes can inherit - named clocks. Required only if clock tree data present - in device tree. - See clock-bindings.txt - -Child chip-select (cs) nodes contain the memory devices nodes connected to -such as NOR (e.g. cfi-flash) and NAND. - -Required child cs node properties: - -- #address-cells: Must be 2. - -- #size-cells: Must be 1. - -- ranges: Empty property indicating that child nodes can inherit - memory layout. - -- clock-ranges: Empty property indicating that child nodes can inherit - named clocks. Required only if clock tree data present - in device tree. - -- mpmc,cs: Chip select number. Indicates to the pl0172 driver - which chipselect is used for accessing the memory. - -- mpmc,memory-width: Width of the chip select memory. Must be equal to - either 8, 16 or 32. - -Optional child cs node config properties: - -- mpmc,async-page-mode: Enable asynchronous page mode. - -- mpmc,cs-active-high: Set chip select polarity to active high. - -- mpmc,byte-lane-low: Set byte lane state to low. - -- mpmc,extended-wait: Enable extended wait. - -- mpmc,buffer-enable: Enable write buffer, option is not supported by - PL175 and PL176 controllers. - -- mpmc,write-protect: Enable write protect. - -Optional child cs node timing properties: - -- mpmc,write-enable-delay: Delay from chip select assertion to write - enable (WE signal) in nano seconds. - -- mpmc,output-enable-delay: Delay from chip select assertion to output - enable (OE signal) in nano seconds. - -- mpmc,write-access-delay: Delay from chip select assertion to write - access in nano seconds. - -- mpmc,read-access-delay: Delay from chip select assertion to read - access in nano seconds. - -- mpmc,page-mode-read-delay: Delay for asynchronous page mode sequential - accesses in nano seconds. - -- mpmc,turn-round-delay: Delay between access to memory banks in nano - seconds. - -If any of the above timing parameters are absent, current parameter value will -be taken from the corresponding HW reg. - -Example for pl172 with nor flash on chip select 0 shown below. - -emc: memory-controller@40005000 { - compatible = "arm,pl172", "arm,primecell"; - reg = <0x40005000 0x1000>; - clocks = <&ccu1 CLK_CPU_EMCDIV>, <&ccu1 CLK_CPU_EMC>; - clock-names = "mpmcclk", "apb_pclk"; - #address-cells = <2>; - #size-cells = <1>; - ranges = <0 0 0x1c000000 0x1000000 - 1 0 0x1d000000 0x1000000 - 2 0 0x1e000000 0x1000000 - 3 0 0x1f000000 0x1000000>; - - cs0 { - #address-cells = <2>; - #size-cells = <1>; - ranges; - - mpmc,cs = <0>; - mpmc,memory-width = <16>; - mpmc,byte-lane-low; - mpmc,write-enable-delay = <0>; - mpmc,output-enable-delay = <0>; - mpmc,read-enable-delay = <70>; - mpmc,page-mode-read-delay = <70>; - - flash@0,0 { - compatible = "sst,sst39vf320", "cfi-flash"; - reg = <0 0 0x400000>; - bank-width = <2>; - #address-cells = <1>; - #size-cells = <1>; - partition@0 { - label = "data"; - reg = <0 0x400000>; - }; - }; - }; -}; |