Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | * Cadence NAND controller |
| 2 | |
| 3 | Required properties: |
| 4 | - compatible : "cdns,hp-nfc" |
| 5 | - reg : Contains two entries, each of which is a tuple consisting of a |
| 6 | physical address and length. The first entry is the address and |
| 7 | length of the controller register set. The second entry is the |
| 8 | address and length of the Slave DMA data port. |
| 9 | - reg-names: should contain "reg" and "sdma" |
| 10 | - #address-cells: should be 1. The cell encodes the chip select connection. |
| 11 | - #size-cells : should be 0. |
| 12 | - interrupts : The interrupt number. |
| 13 | - clocks: phandle of the controller core clock (nf_clk). |
| 14 | |
| 15 | Optional properties: |
| 16 | - dmas: shall reference DMA channel associated to the NAND controller |
| 17 | - cdns,board-delay-ps : Estimated Board delay. The value includes the total |
| 18 | round trip delay for the signals and is used for deciding on values |
| 19 | associated with data read capture. The example formula for SDR mode is |
| 20 | the following: |
| 21 | board delay = RE#PAD delay + PCB trace to device + PCB trace from device |
| 22 | + DQ PAD delay |
| 23 | |
| 24 | Child nodes represent the available NAND chips. |
| 25 | |
| 26 | Required properties of NAND chips: |
| 27 | - reg: shall contain the native Chip Select ids from 0 to max supported by |
| 28 | the cadence nand flash controller |
| 29 | |
| 30 | See Documentation/devicetree/bindings/mtd/nand-controller.yaml for more details on |
| 31 | generic bindings. |
| 32 | |
| 33 | Example: |
| 34 | |
| 35 | nand_controller: nand-controller@60000000 { |
| 36 | compatible = "cdns,hp-nfc"; |
| 37 | #address-cells = <1>; |
| 38 | #size-cells = <0>; |
| 39 | reg = <0x60000000 0x10000>, <0x80000000 0x10000>; |
| 40 | reg-names = "reg", "sdma"; |
| 41 | clocks = <&nf_clk>; |
| 42 | cdns,board-delay-ps = <4830>; |
| 43 | interrupts = <2 0>; |
| 44 | nand@0 { |
| 45 | reg = <0>; |
| 46 | label = "nand-1"; |
| 47 | }; |
| 48 | nand@1 { |
| 49 | reg = <1>; |
| 50 | label = "nand-2"; |
| 51 | }; |
| 52 | |
| 53 | }; |