Maxime,
On Mon, 20 Jul 2015 10:41:32 +0200, Maxime Ripard wrote:
> /**
> + * enum dmaengine_alignment - defines alignment of the DMA async tx
> + * buffers
> + */
> +enum dmaengine_alignment {
> + DMAENGINE_ALIGN_1_BYTE = 0,
> + DMAENGINE_ALIGN_2_BYTES = 1,
> + DMAENGINE_ALIGN_4_BYTES = 2,
> + DMAENGINE_ALIGN_8_BYTES = 3,
> + DMAENGINE_ALIGN_16_BYTES = 4,
> + DMAENGINE_ALIGN_32_BYTES = 5,
> + DMAENGINE_ALIGN_64_BYTES = 6,
> +};
Sorry I didn't think about this during the first iteration, but this
define is just the log2 of the values, no? So maybe you could simply do
something like:
static inline unsigned int dmaengine_alignment(size_t bytes)
{
return ilog2(bytes);
}
Best regards,
Thomas
--
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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