On Thu, 14 Mar 2013 21:11:39 +0100 Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> wrote: > On Thu, Mar 14, 2013 at 05:40:53PM +0100, Anatolij Gustschin wrote: > > Add SDHC DMA channel description to the mpc512x device > > tree to enable slave channel requesting in the mxcmmc > > driver. > > > > mpc512x DMA engine doesn't support endianness conversion > > when reading/writing data from peripheral's FIFO, so we > > have to swap data buffers before each DMA write and after > > each DMA read transfer manually. > > > > Since chained SDHC DMA transfers are not supported on > > mpc512x, limit 'max_segs' tunable parameter to one and > > initialise it to 64 only when running on i.MX platforms. > > They are also not supported on the older i.MX platforms. Shouldn't this > be handled in the DMA driver? This could be handled in the DMA driver, but up to now nobody cared to extend the DMA driver so. Anatolij -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
