Failure to get SDHC to work with NRF5340DK

[thesparkness]

Hello, 

I started my prototyping with the 52840DK and the SD Card was working fine. However, with the 5340 dev kit, I cannot get the SPI to work and access the SD Card properly.

I am getting the error : 

00> *** Booting Zephyr OS build v2.6.99-ncs1-1 **
00>
00> [00357896] <err> main: Storage init ERROR!
00> [00715756] <err> fs: fs mount error (-5)
00> Error mounting disk

I am using the overlay below and the standard FatFs sample in the Zephyr directory.

-- Zephyr version: 2.6.99 (C:/Users/pierr/ncs/v1.7.1/zephyr), build: v2.6.99-ncs1-1

Thanks a lot for your help.

&spi4 {
    compatible = "nordic,nrf-spim";
    status = "okay";
    cs-gpios = <&gpio1 4 GPIO_ACTIVE_LOW>;
    sck-pin = <33>;
    mosi-pin = <34>;
    miso-pin = <35>;
    
    sdhc0: sdhc@0 {
        compatible = "zephyr,mmc-spi-slot";
        reg = <0>;
        status = "okay";
        label = "SDHC0";
        spi-max-frequency = <24000000>;
    };
};

  

[code-magic]

The issue for me turned out being the SPI Max Frequency setting. The max I was able to get this card/module combo to support is 15900000. I am able to mount the FS now on the SD card. If 15900000 does not work try a lower frequency.