From: Dinesh Maniyam <dinesh.mani...@intel.com> The Cadence NAND is a configurable mtd raw block which supports multiple options for chipsets, clocking and reset structure, and feature list.
Signed-off-by: Dinesh Maniyam <dinesh.mani...@intel.com> --- .../mtd/cadence,nand.yaml | 98 +++++++++++++++++++ 1 file changed, 98 insertions(+) create mode 100644 doc/device-tree-bindings/mtd/cadence,nand.yaml diff --git a/doc/device-tree-bindings/mtd/cadence,nand.yaml b/doc/device-tree-bindings/mtd/cadence,nand.yaml new file mode 100644 index 0000000000..11ce023ec6 --- /dev/null +++ b/doc/device-tree-bindings/mtd/cadence,nand.yaml @@ -0,0 +1,98 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mtd/cadence,nand.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Cadence NAND controller + +maintainers: + - Dinesh Maniyam <dinesh.mani...@intel.com> + +properties: + compatible: + enum: + - cdns,nand + + reg-names: + description: | + There are two register regions: + reg: register interface + sdma: host data/command interface + items: + - const: reg + - const: sdma + + reg: + minItems: 2 + maxItems: 2 + + interrupts: + maxItems: 1 + + clocks: + description: | + There is one controller core clock + maxItems: 1 + + resets: + description: | + There are two resets: + controller core reset + combo-phy register reset + minItems: 1 + maxItems: 2 + + cdns,board-delay-ps: + description: | + Estimated Board delay. The value includes the total + round trip delay for the signals and is used for deciding on values + associated with data read capture. The example formula for SDR mode is + the following: + board delay = RE#PAD delay + PCB trace to device + PCB trace from device + + DQ PAD delay + enum: + - 4830 + +patternProperties: + "^nand@[a-f0-9]$": + type: object + properties: + compatible: + const: cdns,nand + + reg: + maxItems: 1 + + label: + maxItems: 1 + +required: + - compatible + - reg + - interrupts + - clocks + - cdns,board-delay-ps + +unevaluatedProperties: false + +examples: + - | + nand-controller@60000000 { + compatible = "cdns,nand"; + reg = <0x60000000 0x10000>, <0x80000000 0x1000>; + reg-names = "reg", "sdma"; + #address-cells = <1>; + #size-cells = <0>; + clocks = <&clk>; + cdns,board-delay-ps = <4830>; + interrupts = <2 0>; + nand@0 { + label = "nand-0"; + reg = <0>; + }; + nand@1 { + label = "nand-1"; + reg = <1>; + }; + }; -- 2.26.2
