NRF54L15 - Speed increment of LFS mounted on External Flash.

[varsha@]

Hello, 
I am facing an issue of low speed of file read and write while using LFS on External Flash, Winbond (W25Q64JV) .

This is the Configuration Im using in my DTS file, Can you please guide me how to increase the efficiency of the File system?

&spi30 {

    compatible = "nordic,nrf-spim";

    status = "okay";

    pinctrl-0 = <&spi30_default>;

    pinctrl-1 = <&spi30_sleep>;

    pinctrl-names = "default", "sleep";

    cs-gpios =<&gpio0 1 GPIO_ACTIVE_LOW>; 

   

    w25q64: w25q64jv@0 {    

        compatible = "jedec,spi-nor";

        reg = <0>;

        spi-max-frequency = <32000000>;

        jedec-id = [ef 40 17];

        label = "external_flash";

        size = <0x800000>; //8 Mb 

        has-dpd;

        t-enter-dpd = <3500>;

        t-exit-dpd = <3500>;

        sfdp-bfp = [

            e5 20 f9 ff  ff ff ff 03  44 eb 08 6b  08 3b 42 bb

            fe ff ff ff  ff ff 00 00  ff ff 40 eb  0c 20 0f 52

            10 d8 00 00  36 02 a6 00  82 ea 14 c4  e9 63 76 33

            7a 75 7a 75  f7 a2 d5 5c  19 f7 4d ff  e9 30 f8 80

            ];

    };

};

[Menon]

Hello,

Based on the DTS you shared, the SPI bus is already configured to run at the maximum supported speed (32 MHz, spi-max-frequency = <32000000>;) for the nRF54L15. There is no higher reliable SPI interface speed available on the nRF54L15, see the product specification.

You may want to review your file system configuration to see whether any optimizations are possible.

Kind Regards,

Abhijith