drivers/dma/lpc18xx-dmamux.c

44 	struct lpc18xx_dmamux_data *dmamux = dev_get_drvdata(dev);
48 	spin_lock_irqsave(&dmamux->lock, flags);
50 	spin_unlock_irqrestore(&dmamux->lock, flags);
57 	struct lpc18xx_dmamux_data *dmamux = platform_get_drvdata(pdev);
67 	if (mux >= dmamux->dma_master_requests) {
86 	spin_lock_irqsave(&dmamux->lock, flags);
87 	if (dmamux->muxes[mux].busy) {
88 		spin_unlock_irqrestore(&dmamux->lock, flags);
90 			mux, mux, dmamux->muxes[mux].value);
95 	dmamux->muxes[mux].busy = true;
96 	dmamux->muxes[mux].value = dma_spec->args[1];
98 	regmap_update_bits(dmamux->reg, LPC18XX_CREG_DMAMUX,
100 			   LPC18XX_DMAMUX_VAL(dmamux->muxes[mux].value, mux));
101 	spin_unlock_irqrestore(&dmamux->lock, flags);
106 	dev_dbg(&pdev->dev, "mapping dmamux %u.%u to dma request %u\n", mux,
107 		dmamux->muxes[mux].value, mux);
109 	return &dmamux->muxes[mux];
115 	struct lpc18xx_dmamux_data *dmamux;
118 	dmamux = devm_kzalloc(&pdev->dev, sizeof(*dmamux), GFP_KERNEL);
119 	if (!dmamux)
122 	dmamux->reg = syscon_regmap_lookup_by_compatible("nxp,lpc1850-creg");
123 	if (IS_ERR(dmamux->reg)) {
125 		return PTR_ERR(dmamux->reg);
129 				   &dmamux->dma_mux_requests);
142 				   &dmamux->dma_master_requests);
149 	dmamux->muxes = devm_kcalloc(&pdev->dev, dmamux->dma_master_requests,
152 	if (!dmamux->muxes)
155 	spin_lock_init(&dmamux->lock);
156 	platform_set_drvdata(pdev, dmamux);
157 	dmamux->dmarouter.dev = &pdev->dev;
158 	dmamux->dmarouter.route_free = lpc18xx_dmamux_free;
161 				      &dmamux->dmarouter);
165 	{ .compatible = "nxp,lpc1850-dmamux" },
172 		.name = "lpc18xx-dmamux",