mounting SD Card on uClinux

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Have you edited your dts file with mmc-spi-slot? See section 3.2 in my uClinux_nios2.pdf document.

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Hi, Thanks for your respond. I got it to work and thanks to Alex Hornung.

Problem:

1) device tree

spi_0: spi@0x140 {

compatible = "ALTR,spi-altera_avalon_spi", "ALTR,spi-1.0";

reg = < 0x00000140 0x00000020 >;

interrupt-parent = < &myCPU >;

interrupts = < 3 >;

/*# address-cells = < 1 >; */ <-comment out

/*# size-cells = < 0 >; */ <-comment out

mmc-spi@0 { <- make sure is named mmc-spi

compatible = "mmc-spi-slot";

spi-max-frequency = < 10000000 >;

reg = < 0x00000000 >;

voltage-ranges = < 3300 3300 >; <-missing important piece

}; //end mmc-slot@0

}; //end spi@0x140 (mmc_spi)

2) menuconfig - Make sure selection is [*] and not [M]

3) of_mmc_spi.c <-there is a bug

for (i = 0; i < num_ranges; i++) {

const int j = i * 2;

u32 mask;

u32 vdd_min = be32_to_cpu(voltage_ranges[j]);

u32 vdd_max = be32_to_cpu(voltage_ranges[j + 1]);

mask = mmc_vddrange_to_ocrmask(voltage_ranges[j],

voltage_ranges[j + 1]);

mask = mmc_vddrange_to_ocrmask(vdd_min, vdd_max);

if (!mask) {

ret = -EINVAL;

dev_err(dev, "OF: voltage-range# %d is invalid\n", i);

goto err_ocr;

}

oms->pdata.ocr_mask |= mask;

}