device tree - ecspi1

damienhuang — Mon, 16 May 2016 04:46:14 GMT

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

Re: device tree - ecspi1

igorpadykov — Mon, 16 May 2016 06:20:30 GMT

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

and linux documentation in linux/Documentation/devicetree

Best regards

igor

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