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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org Signed-off-by: Piotr Sroka --- .../devicetree/bindings/mtd/cadence-nand.txt | 35 ++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 Documentation/devicetree/bindings/mtd/cadence-nand.txt diff --git a/Documentation/devicetree/bindings/mtd/cadence-nand.txt b/Documentation/devicetree/bindings/mtd/cadence-nand.txt new file mode 100644 index 000000000000..82afa34d5652 --- /dev/null +++ b/Documentation/devicetree/bindings/mtd/cadence-nand.txt @@ -0,0 +1,35 @@ +* Cadence NAND controller + +Required properties: + - compatible : "cdns,hpnfc-nand" + - reg : Contains two entries, each of which is a tuple consisting of a + physical address and length. The first entry is the address and + length of the controller register set. The second entry is the + address and length of the Slave DMA data port. + - interrupts : The interrupt number. + - clocks: phandle of the controller core clock (nf_clk). + +Optional properties: +Driver calculates controller timings base on NAND flash memory timings and +the following delays in picoseconds. + - cdns,if-skew : Skew value of the output signals of the NAND Flash interface + - cdns,nand2-delay : Delay value of one NAND2 gate from which + the delay element is build + - cdns,board-delay : 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 + +Example + +nand: nand@60000000 { + compatible = "cdns,hpnfc-nand"; + reg = <0x60000000 0x10000>, <0x80000000 0x10000>; + clocks = <&nf_clk>; + cdns,if-skew = <50>; + cdns,nand2-delay = <37>; + cdns,board-delay = <4830>; + interrupts = <2 0>; +}; -- 2.15.0 ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/