1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (C) 2012-2013, Analog Devices Inc.
4  * Author: Lars-Peter Clausen <lars@metafoo.de>
66 		return -EINVAL;  in axi_spdif_trigger()
69 	regmap_update_bits(spdif->regmap, AXI_SPDIF_REG_CTRL,  in axi_spdif_trigger()
80 	unsigned int clkdiv, stat;  in axi_spdif_hw_params()  local
97 	clkdiv = DIV_ROUND_CLOSEST(clk_get_rate(spdif->clk_ref),  in axi_spdif_hw_params()
98 			rate * 64 * 2) - 1;  in axi_spdif_hw_params()
99 	clkdiv <<= AXI_SPDIF_CTRL_CLKDIV_OFFSET;  in axi_spdif_hw_params()
101 	regmap_write(spdif->regmap, AXI_SPDIF_REG_STAT, stat);  in axi_spdif_hw_params()
102 	regmap_update_bits(spdif->regmap, AXI_SPDIF_REG_CTRL,  in axi_spdif_hw_params()
103 		AXI_SPDIF_CTRL_CLKDIV_MASK, clkdiv);  in axi_spdif_hw_params()
112 	snd_soc_dai_init_dma_data(dai, &spdif->dma_data, NULL);  in axi_spdif_dai_probe()
123 	ret = snd_pcm_hw_constraint_ratnums(substream->runtime, 0,  in axi_spdif_startup()
125 			   &spdif->rate_constraints);  in axi_spdif_startup()
129 	ret = clk_prepare_enable(spdif->clk_ref);  in axi_spdif_startup()
133 	regmap_update_bits(spdif->regmap, AXI_SPDIF_REG_CTRL,  in axi_spdif_startup()
144 	regmap_update_bits(spdif->regmap, AXI_SPDIF_REG_CTRL,  in axi_spdif_shutdown()
147 	clk_disable_unprepare(spdif->clk_ref);  in axi_spdif_shutdown()
169 	.name = "axi-spdif",
187 	spdif = devm_kzalloc(&pdev->dev, sizeof(*spdif), GFP_KERNEL);  in axi_spdif_probe()
189 		return -ENOMEM;  in axi_spdif_probe()
197 	spdif->regmap = devm_regmap_init_mmio(&pdev->dev, base,  in axi_spdif_probe()
199 	if (IS_ERR(spdif->regmap))  in axi_spdif_probe()
200 		return PTR_ERR(spdif->regmap);  in axi_spdif_probe()
202 	spdif->clk = devm_clk_get(&pdev->dev, "axi");  in axi_spdif_probe()
203 	if (IS_ERR(spdif->clk))  in axi_spdif_probe()
204 		return PTR_ERR(spdif->clk);  in axi_spdif_probe()
206 	spdif->clk_ref = devm_clk_get(&pdev->dev, "ref");  in axi_spdif_probe()
207 	if (IS_ERR(spdif->clk_ref))  in axi_spdif_probe()
208 		return PTR_ERR(spdif->clk_ref);  in axi_spdif_probe()
210 	ret = clk_prepare_enable(spdif->clk);  in axi_spdif_probe()
214 	spdif->dma_data.addr = res->start + AXI_SPDIF_REG_TX_FIFO;  in axi_spdif_probe()
215 	spdif->dma_data.addr_width = 4;  in axi_spdif_probe()
216 	spdif->dma_data.maxburst = 1;  in axi_spdif_probe()
218 	spdif->ratnum.num = clk_get_rate(spdif->clk_ref) / 128;  in axi_spdif_probe()
219 	spdif->ratnum.den_step = 1;  in axi_spdif_probe()
220 	spdif->ratnum.den_min = 1;  in axi_spdif_probe()
221 	spdif->ratnum.den_max = 64;  in axi_spdif_probe()
223 	spdif->rate_constraints.rats = &spdif->ratnum;  in axi_spdif_probe()
224 	spdif->rate_constraints.nrats = 1;  in axi_spdif_probe()
226 	ret = devm_snd_soc_register_component(&pdev->dev, &axi_spdif_component,  in axi_spdif_probe()
231 	ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);  in axi_spdif_probe()
238 	clk_disable_unprepare(spdif->clk);  in axi_spdif_probe()
246 	clk_disable_unprepare(spdif->clk);  in axi_spdif_dev_remove()
250 	{ .compatible = "adi,axi-spdif-tx-1.00.a", },
257 		.name = "axi-spdif",
265 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");