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Subject[PATCH 2/2] dt-bindings: nand: Add Cadence NAND controller driver
Date
Signed-off-by: Piotr Sroka <piotrs@cadence.com>
---
.../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
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