DESK-XZU-L/Peripherals/NOR
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| 2026/06/26 | DESK-XZU-L-2.x.x release | ||
Contents
Peripheral NOR[edit | edit source]
Device tree configuration[edit | edit source]
Here below an example of device tree for the Quad-SPI NOR flash configuration used on standard DAVE's kit for the ONDA and ONDA Plus.
From onda.dtsi:
...
...
&qspi {
#address-cells = <1>;
#size-cells = <0>;
flash0: flash@0 {
compatible = "issi,is25wp128", "jedec,spi-nor";
reg = <0x0>, <0x1>;
parallel-memories = /bits/ 64 <0x1000000 0x1000000>;
spi-tx-bus-width = <4>;
spi-rx-bus-width = <4>;
#address-cells = <1>;
#size-cells = <1>;
spi-max-frequency = <25000000>;
};
};
...
...
Accessing the peripheral[edit | edit source]
Linux messages at boot time[edit | edit source]
[ 2.499052] spi-nor spi0.0: is25wp128 (32768 Kbytes)
Check the mtd partitions[edit | edit source]
root@onda:~# cat /proc/mtd dev: size erasesize name mtd0: 02000000 00020000 "spi0.0"
