Hi Baruch, On Mon, 2 Mar 2015 13:28:22 +0200 Baruch Siach <baruch@xxxxxxxxxx> wrote: > The CX92755 SoC is one of Conexant Digicolor series of SoCs. This devicetree > binding document describes the NAND flash controller the is shared by some SoCs > in the Digicolor series. > > Not all of the properties are currently actually used by the driver. > Specifically, the driver doesn't make use of interrupts. This may change in the > future. > > Also worth noting that the only supported ECC mode is "hw_syndrome". In the > future the driver may add support for additional modes. > > Signed-off-by: Baruch Siach <baruch@xxxxxxxxxx> > --- > .../devicetree/bindings/mtd/digicolor-nand.txt | 71 ++++++++++++++++++++++ > 1 file changed, 71 insertions(+) > create mode 100644 Documentation/devicetree/bindings/mtd/digicolor-nand.txt > > diff --git a/Documentation/devicetree/bindings/mtd/digicolor-nand.txt b/Documentation/devicetree/bindings/mtd/digicolor-nand.txt > new file mode 100644 > index 000000000000..60e2d9085b7a > --- /dev/null > +++ b/Documentation/devicetree/bindings/mtd/digicolor-nand.txt > @@ -0,0 +1,71 @@ > +Conexant Digicolor NAND Flash Controller (NFC) > + > +Required properties: > +- compatible : "cnxt,cx92755-nfc". > +- reg : shall contain registers location and length for data and reg. > +- interrupts : shall define the nand controller interrupt. > +- #address-cells: shall be set to 1. Encode the nand CS. > +- #size-cells : shall be set to 0. > +- clocks : shall reference nand controller clocks. > + > +Optional children nodes: > +Children nodes represent the available nand chips. > + > +Required children properties: > +- nand-ecc-mode : must be "hw_syndrome". You could fallback to hw_syndrome when this property is not provided. That would make it optional (and if you ever want to support other modes, you'll just have to explicitly specify nand-ecc-mode). > +- nand-ecc-strength : must be one of 6, 7, 8, 24, 28, 30. > +- nand-ecc-step-size : must be either 512 or 1024. Those 2 properties are no longer mandatory (you fallback to values stored in _ds if they are missing). Best Regards, Boris -- Boris Brezillon, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
