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authorLinus Torvalds <[email protected]>2020-06-04 20:11:25 -0700
committerLinus Torvalds <[email protected]>2020-06-04 20:11:25 -0700
commit571d54ed91c0fae174d933683c0c2e11c84843d9 (patch)
treefedc4c05816f9adff472889fca5ba13039683121 /Documentation/devicetree/bindings/mtd/ingenic,jz4780-nand.txt
parentMerge tag 'arm-dt-5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc (diff)
parentdt-bindings: clock: Add documentation for X1830 bindings. (diff)
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Merge tag 'devicetree-for-5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull devicetree updates from Rob Herring: - Convert various DT (non-binding) doc files to ReST - Various improvements to device link code - Fix __of_attach_node_sysfs refcounting bug - Add support for 'memory-region-names' with reserved-memory binding - Vendor prefixes for Protonic Holland, BeagleBoard.org, Alps, Check Point, Würth Elektronik, U-Boot, Vaisala, Baikal Electronics, Shanghai Awinic Technology Co., MikroTik, Silex Insight - A bunch more binding conversions to DT schema. Only 3K to go. - Add a minimum version check for schema tools - Treewide dropping of 'allOf' usage with schema references. Not needed in new json-schema spec. - Some formatting clean-ups of schemas * tag 'devicetree-for-5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (194 commits) dt-bindings: clock: Add documentation for X1830 bindings. dt-bindings: mailbox: Convert imx mu to json-schema dt-bindings: power: Convert imx gpcv2 to json-schema dt-bindings: power: Convert imx gpc to json-schema dt-bindings: Merge gpio-usb-b-connector with usb-connector dt-bindings: timer: renesas: cmt: Convert to json-schema dt-bindings: clock: Convert i.MX8QXP LPCG to json-schema dt-bindings: timer: Convert i.MX GPT to json-schema dt-bindings: thermal: rcar-thermal: Add device tree support for r8a7742 dt-bindings: serial: Add binding for UART pin swap dt-bindings: geni-se: Add interconnect binding for GENI QUP dt-bindings: geni-se: Convert QUP geni-se bindings to YAML dt-bindings: vendor-prefixes: Add Silex Insight vendor prefix dt-bindings: input: touchscreen: edt-ft5x06: change reg property dt-bindings: usb: qcom,dwc3: Introduce interconnect properties for Qualcomm DWC3 driver dt-bindings: timer: renesas: mtu2: Convert to json-schema of/fdt: Remove redundant kbasename function call dt-bindings: clock: Convert i.MX1 clock to json-schema dt-bindings: clock: Convert i.MX21 clock to json-schema dt-bindings: clock: Convert i.MX25 clock to json-schema ...
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-* Ingenic JZ4780 NAND/ECC
-
-This file documents the device tree bindings for NAND flash devices on the
-JZ4780. NAND devices are connected to the NEMC controller (described in
-memory-controllers/ingenic,jz4780-nemc.txt), and thus NAND device nodes must
-be children of the NEMC node.
-
-Required NAND controller device properties:
-- compatible: Should be one of:
- * ingenic,jz4740-nand
- * ingenic,jz4725b-nand
- * ingenic,jz4780-nand
-- reg: For each bank with a NAND chip attached, should specify a bank number,
- an offset of 0 and a size of 0x1000000 (i.e. the whole NEMC bank).
-
-Optional NAND controller device properties:
-- ecc-engine: To make use of the hardware ECC controller, this
- property must contain a phandle for the ECC controller node. The required
- properties for this node are described below. If this is not specified,
- software ECC will be used instead.
-
-Optional children nodes:
-- Individual NAND chips are children of the NAND controller node.
-
-Required children node properties:
-- reg: An integer ranging from 1 to 6 representing the CS line to use.
-
-Optional children node properties:
-- nand-ecc-step-size: ECC block size in bytes.
-- nand-ecc-strength: ECC strength (max number of correctable bits).
-- nand-ecc-mode: String, operation mode of the NAND ecc mode. "hw" by default
-- nand-on-flash-bbt: boolean to enable on flash bbt option, if not present false
-- rb-gpios: GPIO specifier for the busy pin.
-- wp-gpios: GPIO specifier for the write protect pin.
-
-Optional child node of NAND chip nodes:
-- partitions: see Documentation/devicetree/bindings/mtd/partition.txt
-
-Example:
-
-nemc: nemc@13410000 {
- ...
-
- nandc: nand-controller@1 {
- compatible = "ingenic,jz4780-nand";
- reg = <1 0 0x1000000>; /* Bank 1 */
-
- #address-cells = <1>;
- #size-cells = <0>;
-
- ecc-engine = <&bch>;
-
- nand@1 {
- reg = <1>;
-
- nand-ecc-step-size = <1024>;
- nand-ecc-strength = <24>;
- nand-ecc-mode = "hw";
- nand-on-flash-bbt;
-
- rb-gpios = <&gpa 20 GPIO_ACTIVE_LOW>;
- wp-gpios = <&gpf 22 GPIO_ACTIVE_LOW>;
-
- partitions {
- #address-cells = <2>;
- #size-cells = <2>;
- ...
- }
- };
- };
-};
-
-The ECC controller is a separate SoC component used for error correction on
-NAND devices. The following is a description of the device properties for a
-ECC controller.
-
-Required ECC properties:
-- compatible: Should be one of:
- * ingenic,jz4740-ecc
- * ingenic,jz4725b-bch
- * ingenic,jz4780-bch
-- reg: Should specify the ECC controller registers location and length.
-- clocks: Clock for the ECC controller.
-
-Example:
-
-bch: bch@134d0000 {
- compatible = "ingenic,jz4780-bch";
- reg = <0x134d0000 0x10000>;
-
- clocks = <&cgu JZ4780_CLK_BCH>;
-};
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