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    SubjectRe: [PATCH 8/8] dmaengine/dw_dmac: Add support for DMA_SLAVE_CONFIG
    On 1/17/2012 2:45 PM, Viresh Kumar wrote:
    >>>>>> >>> >> + * Fix sconfig's burst size according to dw_dmac. We need to convert
    >>>>>> >>> >> + * them as: 1 -> 0, 2 -> 1, 4 -> 2, 8 -> 3, 16 -> 4.
    > I need above conversion. i.e. finding bit no. of first bit set.

    Something like:

    unsigned int v; // 32-bit word
    unsigned int r = 0;

    while (v >>= 1)
    {
    r++;
    }

    Probably find_first_bit() suits it.

    --
    viresh


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