2  * tegra20_spdif.c - Tegra20 SPDIF driver
39 #define DRV_NAME "tegra20-spdif"
43 	struct tegra20_spdif *spdif = dev_get_drvdata(dev);  in tegra20_spdif_runtime_suspend()  local
45 	clk_disable_unprepare(spdif->clk_spdif_out);  in tegra20_spdif_runtime_suspend()
52 	struct tegra20_spdif *spdif = dev_get_drvdata(dev);  in tegra20_spdif_runtime_resume()  local
55 	ret = clk_prepare_enable(spdif->clk_spdif_out);  in tegra20_spdif_runtime_resume()
69 	struct tegra20_spdif *spdif = snd_soc_dai_get_drvdata(dai);  in tegra20_spdif_hw_params()  local
84 	regmap_update_bits(spdif->regmap, TEGRA20_SPDIF_CTRL, mask, val);  in tegra20_spdif_hw_params()
112 	ret = clk_set_rate(spdif->clk_spdif_out, spdifclock);  in tegra20_spdif_hw_params()
114 		dev_err(dev, "Can't set SPDIF clock rate: %d\n", ret);  in tegra20_spdif_hw_params()
121 static void tegra20_spdif_start_playback(struct tegra20_spdif *spdif)  in tegra20_spdif_start_playback()  argument
123 	regmap_update_bits(spdif->regmap, TEGRA20_SPDIF_CTRL,  in tegra20_spdif_start_playback()
128 static void tegra20_spdif_stop_playback(struct tegra20_spdif *spdif)  in tegra20_spdif_stop_playback()  argument
130 	regmap_update_bits(spdif->regmap, TEGRA20_SPDIF_CTRL,  in tegra20_spdif_stop_playback()
137 	struct tegra20_spdif *spdif = snd_soc_dai_get_drvdata(dai);  in tegra20_spdif_trigger()  local
143 		tegra20_spdif_start_playback(spdif);  in tegra20_spdif_trigger()
148 		tegra20_spdif_stop_playback(spdif);  in tegra20_spdif_trigger()
159 	struct tegra20_spdif *spdif = snd_soc_dai_get_drvdata(dai);  in tegra20_spdif_probe()  local
162 	dai->playback_dma_data = &spdif->playback_dma_data;  in tegra20_spdif_probe()
267 	struct tegra20_spdif *spdif;  in tegra20_spdif_platform_probe()  local
272 	spdif = devm_kzalloc(&pdev->dev, sizeof(struct tegra20_spdif),  in tegra20_spdif_platform_probe()
274 	if (!spdif)  in tegra20_spdif_platform_probe()
277 	dev_set_drvdata(&pdev->dev, spdif);  in tegra20_spdif_platform_probe()
279 	spdif->clk_spdif_out = devm_clk_get(&pdev->dev, "spdif_out");  in tegra20_spdif_platform_probe()
280 	if (IS_ERR(spdif->clk_spdif_out)) {  in tegra20_spdif_platform_probe()
281 		pr_err("Can't retrieve spdif clock\n");  in tegra20_spdif_platform_probe()
282 		ret = PTR_ERR(spdif->clk_spdif_out);  in tegra20_spdif_platform_probe()
297 	spdif->regmap = devm_regmap_init_mmio(&pdev->dev, regs,  in tegra20_spdif_platform_probe()
299 	if (IS_ERR(spdif->regmap)) {  in tegra20_spdif_platform_probe()
301 		ret = PTR_ERR(spdif->regmap);  in tegra20_spdif_platform_probe()
305 	spdif->playback_dma_data.addr = mem->start + TEGRA20_SPDIF_DATA_OUT;  in tegra20_spdif_platform_probe()
306 	spdif->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;  in tegra20_spdif_platform_probe()
307 	spdif->playback_dma_data.maxburst = 4;  in tegra20_spdif_platform_probe()
308 	spdif->playback_dma_data.slave_id = dmareq->start;  in tegra20_spdif_platform_probe()
373 MODULE_DESCRIPTION("Tegra20 SPDIF ASoC driver");