device tree - ecspi1

[damienhuang]

Hi,

I am using a imx6 sabrelite board from boundary device. its device tree has the blow:

&ecspi1 {

    fsl,spi-num-chipselects = <1>;

    cs-gpios = <&gpio3 19 0>;

    pinctrl-names = "default";

    pinctrl-0 = <&pinctrl_ecspi1_1>;

    status = "okay";

   flash: m25p80@0 {

        compatible = "sst,sst25vf016b";

        spi-max-frequency = <20000000>;

        reg = <0>;

        #address-cells = <1>;

        #size-cells = <1>;

        mtd0@00000000 {

            label = "U-Boot";

            reg = <0x0 0xC0000>;

        };

        mtd@000C0000 {

            label = "env";

            reg = <0xC0000 0x2000>;

        };

        mtd@000C2000 {

            label = "splash";

            reg = <0xC2000 0x13e000>;

        };

    };

can someone give me a tutorial on what does " flash: m25p80@0" really mean?

Cheers,

Damien

[igorpadykov]

Hi Damien

seems this is node name and chip select number (SPINOR_CS0),

some description can be found in p.5 AN5125 Introduction to Device Trees

http://cache.nxp.com/files/32bit/doc/app_note/AN5125.pdf

and linux documentation in linux/Documentation/devicetree

Best regards

igor

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