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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /Documentation/devicetree/bindings/mtd/davinci-nand.txt
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+Device tree bindings for Texas instruments Davinci/Keystone NAND controller
+
+This file provides information, what the device node for the davinci/keystone
+NAND interface contains.
+
+Documentation:
+Davinci DM646x - http://www.ti.com/lit/ug/sprueq7c/sprueq7c.pdf
+Kestone - http://www.ti.com/lit/ug/sprugz3a/sprugz3a.pdf
+
+Required properties:
+
+- compatible: "ti,davinci-nand"
+ "ti,keystone-nand"
+
+- reg: Contains 2 offset/length values:
+ - offset and length for the access window.
+ - offset and length for accessing the AEMIF
+ control registers.
+
+- ti,davinci-chipselect: number of chipselect. Indicates on the
+ davinci_nand driver which chipselect is used
+ for accessing the nand.
+ Can be in the range [0-3].
+
+Recommended properties :
+
+- ti,davinci-mask-ale: mask for ALE. Needed for executing address
+ phase. These offset will be added to the base
+ address for the chip select space the NAND Flash
+ device is connected to.
+ If not set equal to 0x08.
+
+- ti,davinci-mask-cle: mask for CLE. Needed for executing command
+ phase. These offset will be added to the base
+ address for the chip select space the NAND Flash
+ device is connected to.
+ If not set equal to 0x10.
+
+- ti,davinci-mask-chipsel: mask for chipselect address. Needed to mask
+ addresses for given chipselect.
+
+- nand-ecc-mode: operation mode of the NAND ecc mode. ECC mode
+ valid values for davinci driver:
+ - "none"
+ - "soft"
+ - "hw"
+
+- ti,davinci-ecc-bits: used ECC bits, currently supported 1 or 4.
+
+- nand-bus-width: buswidth 8 or 16. If not present 8.
+
+- nand-on-flash-bbt: use flash based bad block table support. OOB
+ identifier is saved in OOB area. If not present
+ false.
+
+Deprecated properties:
+
+- ti,davinci-ecc-mode: operation mode of the NAND ecc mode. ECC mode
+ valid values for davinci driver:
+ - "none"
+ - "soft"
+ - "hw"
+
+- ti,davinci-nand-buswidth: buswidth 8 or 16. If not present 8.
+
+- ti,davinci-nand-use-bbt: use flash based bad block table support. OOB
+ identifier is saved in OOB area. If not present
+ false.
+
+Nand device bindings may contain additional sub-nodes describing partitions of
+the address space. See partition.txt for more detail. The NAND Flash timing
+values must be programmed in the chip select’s node of AEMIF
+memory-controller (see Documentation/devicetree/bindings/memory-controllers/
+davinci-aemif.txt).
+
+Example(da850 EVM ):
+
+nand_cs3@62000000 {
+ compatible = "ti,davinci-nand";
+ reg = <0x62000000 0x807ff
+ 0x68000000 0x8000>;
+ ti,davinci-chipselect = <1>;
+ ti,davinci-mask-ale = <0>;
+ ti,davinci-mask-cle = <0>;
+ ti,davinci-mask-chipsel = <0>;
+ nand-ecc-mode = "hw";
+ ti,davinci-ecc-bits = <4>;
+ nand-on-flash-bbt;
+
+ partition@180000 {
+ label = "ubifs";
+ reg = <0x180000 0x7e80000>;
+ };
+};