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64 lines
2.0 KiB
64 lines
2.0 KiB
NVIDIA Tegra NAND Flash controller |
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Required properties: |
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- compatible: Must be one of: |
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- "nvidia,tegra20-nand" |
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- reg: MMIO address range |
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- interrupts: interrupt output of the NFC controller |
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- clocks: Must contain an entry for each entry in clock-names. |
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See ../clocks/clock-bindings.txt for details. |
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- clock-names: Must include the following entries: |
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- nand |
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- resets: Must contain an entry for each entry in reset-names. |
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See ../reset/reset.txt for details. |
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- reset-names: Must include the following entries: |
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- nand |
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Optional children nodes: |
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Individual NAND chips are children of the NAND controller node. Currently |
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only one NAND chip supported. |
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Required children node properties: |
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- reg: An integer ranging from 1 to 6 representing the CS line to use. |
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Optional children node properties: |
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- nand-ecc-mode: String, operation mode of the NAND ecc mode. Currently only |
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"hw" is supported. |
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- nand-ecc-algo: string, algorithm of NAND ECC. |
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Supported values with "hw" ECC mode are: "rs", "bch". |
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- nand-bus-width : See nand-controller.yaml |
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- nand-on-flash-bbt: See nand-controller.yaml |
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- nand-ecc-strength: integer representing the number of bits to correct |
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per ECC step (always 512). Supported strength using HW ECC |
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modes are: |
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- RS: 4, 6, 8 |
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- BCH: 4, 8, 14, 16 |
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- nand-ecc-maximize: See nand-controller.yaml |
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- nand-is-boot-medium: Makes sure only ECC strengths supported by the boot ROM |
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are chosen. |
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- wp-gpios: GPIO specifier for the write protect pin. |
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Optional child node of NAND chip nodes: |
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Partitions: see partition.txt |
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Example: |
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nand-controller@70008000 { |
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compatible = "nvidia,tegra20-nand"; |
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reg = <0x70008000 0x100>; |
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interrupts = <GIC_SPI 24 IRQ_TYPE_LEVEL_HIGH>; |
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clocks = <&tegra_car TEGRA20_CLK_NDFLASH>; |
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clock-names = "nand"; |
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resets = <&tegra_car 13>; |
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reset-names = "nand"; |
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nand@0 { |
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reg = <0>; |
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#address-cells = <1>; |
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#size-cells = <1>; |
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nand-bus-width = <8>; |
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nand-on-flash-bbt; |
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nand-ecc-algo = "bch"; |
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nand-ecc-strength = <8>; |
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wp-gpios = <&gpio TEGRA_GPIO(S, 0) GPIO_ACTIVE_LOW>; |
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}; |
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};
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