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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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