3  * STM32 ALSA SoC Digital Audio Interface (SAI) driver.
40 	{ .compatible = "st,stm32f4-sai", .data = (void *)&stm32_sai_conf_f4 },
41 	{ .compatible = "st,stm32h7-sai", .data = (void *)&stm32_sai_conf_h7 },
47 	struct stm32_sai_data *sai = dev_get_drvdata(dev);  in stm32_sai_pclk_disable()  local
49 	clk_disable_unprepare(sai->pclk);  in stm32_sai_pclk_disable()
56 	struct stm32_sai_data *sai = dev_get_drvdata(dev);  in stm32_sai_pclk_enable()  local
59 	ret = clk_prepare_enable(sai->pclk);  in stm32_sai_pclk_enable()
61 		dev_err(&sai->pdev->dev, "failed to enable clock: %d\n", ret);  in stm32_sai_pclk_enable()
68 static int stm32_sai_sync_conf_client(struct stm32_sai_data *sai, int synci)  in stm32_sai_sync_conf_client()  argument
73 	ret = stm32_sai_pclk_enable(&sai->pdev->dev);  in stm32_sai_sync_conf_client()
77 	writel_relaxed(FIELD_PREP(SAI_GCR_SYNCIN_MASK, (synci - 1)), sai->base);  in stm32_sai_sync_conf_client()
79 	stm32_sai_pclk_disable(&sai->pdev->dev);  in stm32_sai_sync_conf_client()
84 static int stm32_sai_sync_conf_provider(struct stm32_sai_data *sai, int synco)  in stm32_sai_sync_conf_provider()  argument
90 	ret = stm32_sai_pclk_enable(&sai->pdev->dev);  in stm32_sai_sync_conf_provider()
94 	dev_dbg(&sai->pdev->dev, "Set %pOFn%s as synchro provider\n",  in stm32_sai_sync_conf_provider()
95 		sai->pdev->dev.of_node,  in stm32_sai_sync_conf_provider()
98 	prev_synco = FIELD_GET(SAI_GCR_SYNCOUT_MASK, readl_relaxed(sai->base));  in stm32_sai_sync_conf_provider()
100 		dev_err(&sai->pdev->dev, "%pOFn%s already set as sync provider\n",  in stm32_sai_sync_conf_provider()
101 			sai->pdev->dev.of_node,  in stm32_sai_sync_conf_provider()
103 		stm32_sai_pclk_disable(&sai->pdev->dev);  in stm32_sai_sync_conf_provider()
107 	writel_relaxed(FIELD_PREP(SAI_GCR_SYNCOUT_MASK, synco), sai->base);  in stm32_sai_sync_conf_provider()
109 	stm32_sai_pclk_disable(&sai->pdev->dev);  in stm32_sai_sync_conf_provider()
132 			"SAI sync provider data not found\n");  in stm32_sai_set_sync()
153 	struct stm32_sai_data *sai;  in stm32_sai_probe()  local
159 	sai = devm_kzalloc(&pdev->dev, sizeof(*sai), GFP_KERNEL);  in stm32_sai_probe()
160 	if (!sai)  in stm32_sai_probe()
163 	sai->base = devm_platform_ioremap_resource(pdev, 0);  in stm32_sai_probe()
164 	if (IS_ERR(sai->base))  in stm32_sai_probe()
165 		return PTR_ERR(sai->base);  in stm32_sai_probe()
169 		memcpy(&sai->conf, (const struct stm32_sai_conf *)of_id->data,  in stm32_sai_probe()
174 	if (!STM_SAI_IS_F4(sai)) {  in stm32_sai_probe()
175 		sai->pclk = devm_clk_get(&pdev->dev, "pclk");  in stm32_sai_probe()
176 		if (IS_ERR(sai->pclk)) {  in stm32_sai_probe()
177 			if (PTR_ERR(sai->pclk) != -EPROBE_DEFER)  in stm32_sai_probe()
179 					PTR_ERR(sai->pclk));  in stm32_sai_probe()
180 			return PTR_ERR(sai->pclk);  in stm32_sai_probe()
184 	sai->clk_x8k = devm_clk_get(&pdev->dev, "x8k");  in stm32_sai_probe()
185 	if (IS_ERR(sai->clk_x8k)) {  in stm32_sai_probe()
186 		if (PTR_ERR(sai->clk_x8k) != -EPROBE_DEFER)  in stm32_sai_probe()
188 				PTR_ERR(sai->clk_x8k));  in stm32_sai_probe()
189 		return PTR_ERR(sai->clk_x8k);  in stm32_sai_probe()
192 	sai->clk_x11k = devm_clk_get(&pdev->dev, "x11k");  in stm32_sai_probe()
193 	if (IS_ERR(sai->clk_x11k)) {  in stm32_sai_probe()
194 		if (PTR_ERR(sai->clk_x11k) != -EPROBE_DEFER)  in stm32_sai_probe()
196 				PTR_ERR(sai->clk_x11k));  in stm32_sai_probe()
197 		return PTR_ERR(sai->clk_x11k);  in stm32_sai_probe()
201 	sai->irq = platform_get_irq(pdev, 0);  in stm32_sai_probe()
202 	if (sai->irq < 0)  in stm32_sai_probe()
203 		return sai->irq;  in stm32_sai_probe()
218 	ret = clk_prepare_enable(sai->pclk);  in stm32_sai_probe()
225 			readl_relaxed(sai->base + STM_SAI_IDR));  in stm32_sai_probe()
227 		val = readl_relaxed(sai->base + STM_SAI_HWCFGR);  in stm32_sai_probe()
228 		sai->conf.fifo_size = FIELD_GET(SAI_HWCFGR_FIFO_SIZE, val);  in stm32_sai_probe()
229 		sai->conf.has_spdif_pdm = !!FIELD_GET(SAI_HWCFGR_SPDIF_PDM,  in stm32_sai_probe()
232 		val = readl_relaxed(sai->base + STM_SAI_VERR);  in stm32_sai_probe()
233 		sai->conf.version = val;  in stm32_sai_probe()
235 		dev_dbg(&pdev->dev, "SAI version: %lu.%lu registered\n",  in stm32_sai_probe()
239 	clk_disable_unprepare(sai->pclk);  in stm32_sai_probe()
241 	sai->pdev = pdev;  in stm32_sai_probe()
242 	sai->set_sync = &stm32_sai_set_sync;  in stm32_sai_probe()
243 	platform_set_drvdata(pdev, sai);  in stm32_sai_probe()
250  * When pins are shared by two sai sub instances, pins have to be defined
251  * in sai parent node. In this case, pins state is not managed by alsa fw.
256 	struct stm32_sai_data *sai = dev_get_drvdata(dev);  in stm32_sai_suspend()  local
263 	sai->gcr = readl_relaxed(sai->base);  in stm32_sai_suspend()
271 	struct stm32_sai_data *sai = dev_get_drvdata(dev);  in stm32_sai_resume()  local
278 	writel_relaxed(sai->gcr, sai->base);  in stm32_sai_resume()
293 		.name = "st,stm32-sai",
302 MODULE_DESCRIPTION("STM32 Soc SAI Interface");
304 MODULE_ALIAS("platform:st,stm32-sai");