# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) %YAML 1.2 --- $id: http://devicetree.org/schemas/mtd/gpmi-nand.yaml# $schema: http://devicetree.org/meta-schemas/core.yaml# title: Freescale General-Purpose Media Interface (GPMI) maintainers: - Han Xu description: | The GPMI nand controller provides an interface to control the NAND flash chips. The device tree may optionally contain sub-nodes describing partitions of the address space. See mtd.yaml for more detail. properties: compatible: oneOf: - enum: - fsl,imx23-gpmi-nand - fsl,imx28-gpmi-nand - fsl,imx6q-gpmi-nand - fsl,imx6sx-gpmi-nand - fsl,imx7d-gpmi-nand - fsl,imx8qxp-gpmi-nand - items: - enum: - fsl,imx8mm-gpmi-nand - fsl,imx8mn-gpmi-nand - const: fsl,imx7d-gpmi-nand reg: items: - description: Address and length of gpmi block. - description: Address and length of bch block. reg-names: items: - const: gpmi-nand - const: bch interrupts: maxItems: 1 interrupt-names: const: bch dmas: maxItems: 1 dma-names: const: rx-tx clocks: minItems: 1 maxItems: 5 clock-names: minItems: 1 maxItems: 5 fsl,use-minimum-ecc: type: boolean description: | Protect this NAND flash with the minimum ECC strength required. The required ECC strength is automatically discoverable for some flash (e.g., according to the ONFI standard). However, note that if this strength is not discoverable or this property is not enabled, the software may chooses an implementation-defined ECC scheme. fsl,no-blockmark-swap: type: boolean description: | Don't swap the bad block marker from the OOB area with the byte in the data area but rely on the flash based BBT for identifying bad blocks. NOTE: this is only valid in conjunction with 'nand-on-flash-bbt'. WARNING: on i.MX28 blockmark swapping cannot be disabled for the BootROM in the FCB. Thus, partitions written from Linux with this feature turned on may not be accessible by the BootROM code. required: - compatible - reg - reg-names - interrupts - interrupt-names - clocks - clock-names - dmas - dma-names unevaluatedProperties: false allOf: - $ref: nand-controller.yaml - if: properties: compatible: contains: enum: - fsl,imx23-gpmi-nand - fsl,imx28-gpmi-nand then: properties: clocks: items: - description: SoC gpmi io clock clock-names: items: - const: gpmi_io - if: properties: compatible: contains: enum: - fsl,imx6q-gpmi-nand - fsl,imx6sx-gpmi-nand then: properties: clocks: items: - description: SoC gpmi io clock - description: SoC gpmi apb clock - description: SoC gpmi bch clock - description: SoC gpmi bch apb clock - description: SoC per1 bch clock clock-names: items: - const: gpmi_io - const: gpmi_apb - const: gpmi_bch - const: gpmi_bch_apb - const: per1_bch - if: properties: compatible: contains: const: fsl,imx7d-gpmi-nand then: properties: clocks: items: - description: SoC gpmi io clock - description: SoC gpmi bch apb clock clock-names: items: - const: gpmi_io - const: gpmi_bch_apb - if: properties: compatible: contains: enum: - fsl,imx8qxp-gpmi-nand then: properties: clocks: items: - description: SoC gpmi io clock - description: SoC gpmi apb clock - description: SoC gpmi bch clock - description: SoC gpmi bch apb clock clock-names: items: - const: gpmi_io - const: gpmi_apb - const: gpmi_bch - const: gpmi_bch_apb examples: - | nand-controller@8000c000 { #address-cells = <1>; #size-cells = <0>; compatible = "fsl,imx28-gpmi-nand"; reg = <0x8000c000 0x2000>, <0x8000a000 0x2000>; reg-names = "gpmi-nand", "bch"; interrupts = <41>; interrupt-names = "bch"; clocks = <&clks 50>; clock-names = "gpmi_io"; dmas = <&dma_apbh 4>; dma-names = "rx-tx"; };