(CCing DT mailing list and DT binding maintainers)
On 01/06/2015 02:08 PM, Graham Moore wrote:
> Signed-off-by: Graham Moore <grmoore@xxxxxxxxxxxxxxxxxxxxx>
> ---
> .../devicetree/bindings/mtd/cadence_quadspi.txt | 50 ++++++++++++++++++++
> 1 file changed, 50 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/mtd/cadence_quadspi.txt
>
> diff --git a/Documentation/devicetree/bindings/mtd/cadence_quadspi.txt b/Documentation/devicetree/bindings/mtd/cadence_quadspi.txt
> new file mode 100644
> index 0000000..3a8ea1c
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mtd/cadence_quadspi.txt
> @@ -0,0 +1,50 @@
> +* Cadence Quad SPI controller
> +
> +Required properties:
> +- compatible : Should be "cdns,qspi-nor".
> +- 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 QSPI Controller data area.
> +- interrupts : Unit interrupt specifier for the controller interrupt.
> +- clocks : phandle to the Quad SPI clock.
> +- ext-decoder : Value of 0 means no external chipselect decoder is
> + connected, 1 means there is an external chipselect decoder connected.
As I already said in the driver patch, I think this property should be
boolean and have a vendor prefix.
> +- fifo-depth : Size of the data FIFO in words.
This one looks generic enough to leave it as it is, without any vendor
prefix.
> +- bus-num : Number of the SPI bus to which the controller is connected.
> +
I think you forgot to remove bus-num here.
> +Optional subnodes:
> +Subnodes of the Cadence Quad SPI controller are spi slave nodes with additional
> +custom properties:
> +- cdns,page-size : Size, in bytes, of the device's write page
> +- cdns,block-size : Size of the device's erase block
> +- cdns,read-delay : Selay for read capture logic, in clock cycles
> +- cdns,tshsl-ns : Delay in master reference clocks for the length that the master mode chip select outputs are de-asserted between transactions.
> +- cdns,tsd2d-ns : Delay in master reference clocks between one chip select being de-activated and the activation of another.
> +- cdns,tchsh-ns : Delay in master reference clocks between last bit of current transaction and deasserting the device chip select (qspi_n_ss_out).
> +- cdns,tslch-ns : Delay in master reference clocks between setting qspi_n_ss_out low and first bit transfer.
> +
> +Example:
> +
> + qspi: spi@ff705000 {
> + compatible = "cdns,qspi-nor";
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <0xff705000 0x1000>,
> + <0xffa00000 0x1000>;
> + interrupts = <0 151 4>;
> + clocks = <&qspi_clk>;
> + ext-decoder = <0>;
> + fifo-depth = <128>;
> +
> + flash0: n25q00@0 {
> + ...
> + cdns,page-size = <256>;
> + cdns,block-size = <16>;
> + cdns,read-delay = <4>;
> + cdns,tshsl-ns = <50>;
> + cdns,tsd2d-ns = <50>;
> + cdns,tchsh-ns = <4>;
> + cdns,tslch-ns = <4>;
> + }
> + }
>
--
Ezequiel Garcia, VanguardiaSur
www.vanguardiasur.com.ar
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