Messages in this thread | | | Date | Tue, 17 Jan 2012 14:49:53 +0530 | From | Viresh Kumar <> | Subject | Re: [PATCH 8/8] dmaengine/dw_dmac: Add support for DMA_SLAVE_CONFIG |
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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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