On Wed, Jun 22, 2011 at 9:11 PM, Sjur Brændeland <sjur.brandeland@xxxxxxxxxxxxxx> wrote: >>+/* >>+ * API for HSI clients >>+ */ >>+int hsi_async(struct hsi_client *cl, struct hsi_msg *msg); >>+ >>+/** > > I'm pleased to see scatter list support. But is this supported by all HW? > What is the behavior if HW doesn't support this, will hsi_async fail, or > is the scatter-list handled 'under the hood'? I think it's pretty straight-forward even if you have to use PIO (IRQs and CPU-filling of FIFO). You simply use a memory iterator (sg_miter), so for example the MMC layer can only handle SGlists and in mmci.c we use sg_miter_start/next/stop to do this in the PIO case. If that kind of hardware would ever be fast enough for anyone using a HSI link is a good question though :-) Yours, Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
