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Diffstat (limited to 'Documentation/devicetree/bindings/mtd/gpio-control-nand.txt')
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diff --git a/Documentation/devicetree/bindings/mtd/gpio-control-nand.txt b/Documentation/devicetree/bindings/mtd/gpio-control-nand.txt deleted file mode 100644 index 36ef07d3c90..00000000000 --- a/Documentation/devicetree/bindings/mtd/gpio-control-nand.txt +++ /dev/null | |||
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1 | GPIO assisted NAND flash | ||
2 | |||
3 | The GPIO assisted NAND flash uses a memory mapped interface to | ||
4 | read/write the NAND commands and data and GPIO pins for the control | ||
5 | signals. | ||
6 | |||
7 | Required properties: | ||
8 | - compatible : "gpio-control-nand" | ||
9 | - reg : should specify localbus chip select and size used for the chip. The | ||
10 | resource describes the data bus connected to the NAND flash and all accesses | ||
11 | are made in native endianness. | ||
12 | - #address-cells, #size-cells : Must be present if the device has sub-nodes | ||
13 | representing partitions. | ||
14 | - gpios : specifies the gpio pins to control the NAND device. nwp is an | ||
15 | optional gpio and may be set to 0 if not present. | ||
16 | |||
17 | Optional properties: | ||
18 | - bank-width : Width (in bytes) of the device. If not present, the width | ||
19 | defaults to 1 byte. | ||
20 | - chip-delay : chip dependent delay for transferring data from array to | ||
21 | read registers (tR). If not present then a default of 20us is used. | ||
22 | - gpio-control-nand,io-sync-reg : A 64-bit physical address for a read | ||
23 | location used to guard against bus reordering with regards to accesses to | ||
24 | the GPIO's and the NAND flash data bus. If present, then after changing | ||
25 | GPIO state and before and after command byte writes, this register will be | ||
26 | read to ensure that the GPIO accesses have completed. | ||
27 | |||
28 | The device tree may optionally contain sub-nodes describing partitions of the | ||
29 | address space. See partition.txt for more detail. | ||
30 | |||
31 | Examples: | ||
32 | |||
33 | gpio-nand@1,0 { | ||
34 | compatible = "gpio-control-nand"; | ||
35 | reg = <1 0x0000 0x2>; | ||
36 | #address-cells = <1>; | ||
37 | #size-cells = <1>; | ||
38 | gpios = <&banka 1 0 /* rdy */ | ||
39 | &banka 2 0 /* nce */ | ||
40 | &banka 3 0 /* ale */ | ||
41 | &banka 4 0 /* cle */ | ||
42 | 0 /* nwp */>; | ||
43 | |||
44 | partition@0 { | ||
45 | ... | ||
46 | }; | ||
47 | }; | ||