On Friday 11 September 2015 15:14:26 Peter Griffin wrote: > + > +#include "st_fdma.h" Just move the contents of that file here, no other driver should be including it. > +static struct dma_chan *st_fdma_of_xlate(struct of_phandle_args *dma_spec, > + struct of_dma *ofdma) > +{ > + struct st_fdma_dev *fdev = ofdma->of_dma_data; > + struct st_fdma_cfg cfg; > + > + if (dma_spec->args_count < 1) > + return NULL; > + > + cfg.of_node = dma_spec->np; > + cfg.req_line = dma_spec->args[0]; > + cfg.req_ctrl = 0; > + cfg.type = ST_FDMA_TYPE_FREE_RUN; > + > + if (dma_spec->args_count > 1) > + cfg.req_ctrl = dma_spec->args[1] & REQ_CTRL_CFG_MASK; > + > + if (dma_spec->args_count > 2) > + cfg.type = dma_spec->args[2]; The binding mandates #dma-cells=<3>, so you can just return an error otherwise. > + dev_dbg(fdev->dev, "xlate req_line:%d type:%d req_ctrl:%#x\n", > + cfg.req_line, cfg.type, cfg.req_ctrl); > + > + return dma_request_channel(fdev->dma_device.cap_mask, > + st_fdma_filter_fn, &cfg); > +} Why this indirection? You should be able to just use dma_get_any_slave_channel() to get the first available channel and then configure it the same way that the filter function does. > +bool st_fdma_filter_fn(struct dma_chan *chan, void *param) > +{ > + struct st_fdma_cfg *config = param; > + struct st_fdma_chan *fchan = to_st_fdma_chan(chan); > + > + if (!param) > + return false; > + > + if (fchan->fdev->dma_device.dev->of_node != config->of_node) > + return false; > + > + fchan->cfg = *config; > + > + return true; > +} Please drop this until there is a board file that references the function. Otherwise it's just dead code. I assume there are some users in arch/sh/ in a private tree? Arnd -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html