[PATCH v2 3/7] dmaengine: Add driver for TI DMA crossbar on DRA7x

* Peter Ujfalusi [off-list ref] [150326 05:32]:

On 03/26/2015 12:56 PM, Vinod Koul wrote:

quoted

quoted

+
+static void ti_dma_xbar_free(struct device *dev, void *route_data)
+{
+	struct ti_dma_xbar_data *xbar = dev_get_drvdata(dev);
+	struct ti_dma_xbar_map *map = route_data;
+
+	dev_dbg(dev, "Unmapping XBAR%d (was routed to %d)\n",
+		map->xbar_in, map->xbar_out);
+
+	regmap_write(xbar->regmap, map->xbar_out * 2, 0);

just out of curiosity how much do you save using regmap :)

good point, not much I guess. I had it implemented w/o regmap as well, but
thought why not use regmap if it is available.

Regmap is nice for slow devices and devices in a shared register
range like the omap syscon general area. For normal use, there's
quite a bit of overhead with regmap compared to just read/write :)

Regards,

Tony