3  * tegra20_spdif.c - Tegra20 SPDIF driver
30 	struct tegra20_spdif *spdif = dev_get_drvdata(dev);  in tegra20_spdif_runtime_suspend()  local
32 	regcache_cache_only(spdif->regmap, true);  in tegra20_spdif_runtime_suspend()
34 	clk_disable_unprepare(spdif->clk_spdif_out);  in tegra20_spdif_runtime_suspend()
41 	struct tegra20_spdif *spdif = dev_get_drvdata(dev);  in tegra20_spdif_runtime_resume()  local
44 	ret = reset_control_assert(spdif->reset);  in tegra20_spdif_runtime_resume()
48 	ret = clk_prepare_enable(spdif->clk_spdif_out);  in tegra20_spdif_runtime_resume()
56 	ret = reset_control_deassert(spdif->reset);  in tegra20_spdif_runtime_resume()
60 	regcache_cache_only(spdif->regmap, false);  in tegra20_spdif_runtime_resume()
61 	regcache_mark_dirty(spdif->regmap);  in tegra20_spdif_runtime_resume()
63 	ret = regcache_sync(spdif->regmap);  in tegra20_spdif_runtime_resume()
70 	clk_disable_unprepare(spdif->clk_spdif_out);  in tegra20_spdif_runtime_resume()
79 	struct tegra20_spdif *spdif = dev_get_drvdata(dai->dev);  in tegra20_spdif_hw_params()  local
95 	regmap_update_bits(spdif->regmap, TEGRA20_SPDIF_CTRL, mask, val);  in tegra20_spdif_hw_params()
101 	regmap_update_bits(spdif->regmap, TEGRA20_SPDIF_DATA_FIFO_CSR,  in tegra20_spdif_hw_params()
131 	ret = clk_set_rate(spdif->clk_spdif_out, spdifclock);  in tegra20_spdif_hw_params()
133 		dev_err(dai->dev, "Can't set SPDIF clock rate: %d\n", ret);  in tegra20_spdif_hw_params()
137 	rate = clk_get_rate(spdif->clk_spdif_out);  in tegra20_spdif_hw_params()
140 			      "SPDIF clock rate %d doesn't match requested rate %lu\n",  in tegra20_spdif_hw_params()
146 static void tegra20_spdif_start_playback(struct tegra20_spdif *spdif)  in tegra20_spdif_start_playback()  argument
148 	regmap_update_bits(spdif->regmap, TEGRA20_SPDIF_CTRL,  in tegra20_spdif_start_playback()
153 static void tegra20_spdif_stop_playback(struct tegra20_spdif *spdif)  in tegra20_spdif_stop_playback()  argument
155 	regmap_update_bits(spdif->regmap, TEGRA20_SPDIF_CTRL,  in tegra20_spdif_stop_playback()
162 	struct tegra20_spdif *spdif = dev_get_drvdata(dai->dev);  in tegra20_spdif_trigger()  local
168 		tegra20_spdif_start_playback(spdif);  in tegra20_spdif_trigger()
173 		tegra20_spdif_stop_playback(spdif);  in tegra20_spdif_trigger()
187 	struct tegra20_spdif *spdif = dev_get_drvdata(dai->dev);  in tegra20_spdif_filter_rates()  local
188 	struct clk *parent = clk_get_parent(spdif->clk_spdif_out);  in tegra20_spdif_filter_rates()
220 	 * SPDIF and I2S share audio PLL. HDMI takes audio packets from SPDIF  in tegra20_spdif_startup()
224 	 * don't match PLL rate at the start of stream to allow both SPDIF  in tegra20_spdif_startup()
236 	struct tegra20_spdif *spdif = dev_get_drvdata(dai->dev);  in tegra20_spdif_probe()  local
238 	snd_soc_dai_init_dma_data(dai, &spdif->playback_dma_data, NULL);  in tegra20_spdif_probe()
251 	.name = "tegra20-spdif",
264 	.name = "tegra20-spdif",
345 	struct tegra20_spdif *spdif;  in tegra20_spdif_platform_probe()  local
350 	spdif = devm_kzalloc(&pdev->dev, sizeof(struct tegra20_spdif),  in tegra20_spdif_platform_probe()
352 	if (!spdif)  in tegra20_spdif_platform_probe()
355 	dev_set_drvdata(&pdev->dev, spdif);  in tegra20_spdif_platform_probe()
357 	spdif->reset = devm_reset_control_get_exclusive(&pdev->dev, NULL);  in tegra20_spdif_platform_probe()
358 	if (IS_ERR(spdif->reset)) {  in tegra20_spdif_platform_probe()
359 		dev_err(&pdev->dev, "Can't retrieve spdif reset\n");  in tegra20_spdif_platform_probe()
360 		return PTR_ERR(spdif->reset);  in tegra20_spdif_platform_probe()
363 	spdif->clk_spdif_out = devm_clk_get(&pdev->dev, "out");  in tegra20_spdif_platform_probe()
364 	if (IS_ERR(spdif->clk_spdif_out)) {  in tegra20_spdif_platform_probe()
365 		dev_err(&pdev->dev, "Could not retrieve spdif clock\n");  in tegra20_spdif_platform_probe()
366 		return PTR_ERR(spdif->clk_spdif_out);  in tegra20_spdif_platform_probe()
373 	spdif->regmap = devm_regmap_init_mmio(&pdev->dev, regs,  in tegra20_spdif_platform_probe()
375 	if (IS_ERR(spdif->regmap)) {  in tegra20_spdif_platform_probe()
377 		return PTR_ERR(spdif->regmap);  in tegra20_spdif_platform_probe()
380 	spdif->playback_dma_data.addr = mem->start + TEGRA20_SPDIF_DATA_OUT;  in tegra20_spdif_platform_probe()
381 	spdif->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;  in tegra20_spdif_platform_probe()
382 	spdif->playback_dma_data.maxburst = 4;  in tegra20_spdif_platform_probe()
413 	{ .compatible = "nvidia,tegra20-spdif", },
420 		.name = "tegra20-spdif",
429 MODULE_DESCRIPTION("Tegra20 SPDIF ASoC driver");