2  * Atmel SSC driver
17 #include <linux/atmel-ssc.h>
32 	struct ssc_device *ssc;  in ssc_request()  local
35 	list_for_each_entry(ssc, &ssc_list, list) {  in ssc_request()
36 		if (ssc->pdev->dev.of_node) {  in ssc_request()
37 			if (of_alias_get_id(ssc->pdev->dev.of_node, "ssc")  in ssc_request()
39 				ssc->pdev->id = ssc_num;  in ssc_request()
43 		} else if (ssc->pdev->id == ssc_num) {  in ssc_request()
51 		pr_err("ssc: ssc%d platform device is missing\n", ssc_num);  in ssc_request()
55 	if (ssc->user) {  in ssc_request()
57 		dev_dbg(&ssc->pdev->dev, "module busy\n");  in ssc_request()
60 	ssc->user++;  in ssc_request()
63 	clk_prepare(ssc->clk);  in ssc_request()
65 	return ssc;  in ssc_request()
69 void ssc_free(struct ssc_device *ssc)  in ssc_free()  argument
74 	if (ssc->user)  in ssc_free()
75 		ssc->user--;  in ssc_free()
78 		dev_dbg(&ssc->pdev->dev, "device already free\n");  in ssc_free()
83 		clk_unprepare(ssc->clk);  in ssc_free()
120 		.compatible = "atmel,at91rm9200-ssc",
123 		.compatible = "atmel,at91sam9rl-ssc",
126 		.compatible = "atmel,at91sam9g45-ssc",
151 static int ssc_sound_dai_probe(struct ssc_device *ssc)  in ssc_sound_dai_probe()  argument
153 	struct device_node *np = ssc->pdev->dev.of_node;  in ssc_sound_dai_probe()
157 	ssc->sound_dai = false;  in ssc_sound_dai_probe()
162 	id = of_alias_get_id(np, "ssc");  in ssc_sound_dai_probe()
167 	ssc->sound_dai = !ret;  in ssc_sound_dai_probe()
172 static void ssc_sound_dai_remove(struct ssc_device *ssc)  in ssc_sound_dai_remove()  argument
174 	if (!ssc->sound_dai)  in ssc_sound_dai_remove()
177 	atmel_ssc_put_audio(of_alias_get_id(ssc->pdev->dev.of_node, "ssc"));  in ssc_sound_dai_remove()
180 static inline int ssc_sound_dai_probe(struct ssc_device *ssc)  in ssc_sound_dai_probe()  argument
182 	if (of_property_read_bool(ssc->pdev->dev.of_node, "#sound-dai-cells"))  in ssc_sound_dai_probe()
188 static inline void ssc_sound_dai_remove(struct ssc_device *ssc)  in ssc_sound_dai_remove()  argument
196 	struct ssc_device *ssc;  in ssc_probe()  local
199 	ssc = devm_kzalloc(&pdev->dev, sizeof(struct ssc_device), GFP_KERNEL);  in ssc_probe()
200 	if (!ssc) {  in ssc_probe()
205 	ssc->pdev = pdev;  in ssc_probe()
210 	ssc->pdata = (struct atmel_ssc_platform_data *)plat_dat;  in ssc_probe()
214 		ssc->clk_from_rk_pin =  in ssc_probe()
219 	ssc->regs = devm_ioremap_resource(&pdev->dev, regs);  in ssc_probe()
220 	if (IS_ERR(ssc->regs))  in ssc_probe()
221 		return PTR_ERR(ssc->regs);  in ssc_probe()
223 	ssc->phybase = regs->start;  in ssc_probe()
225 	ssc->clk = devm_clk_get(&pdev->dev, "pclk");  in ssc_probe()
226 	if (IS_ERR(ssc->clk)) {  in ssc_probe()
232 	clk_prepare_enable(ssc->clk);  in ssc_probe()
233 	ssc_writel(ssc->regs, IDR, -1);  in ssc_probe()
234 	ssc_readl(ssc->regs, SR);  in ssc_probe()
235 	clk_disable_unprepare(ssc->clk);  in ssc_probe()
237 	ssc->irq = platform_get_irq(pdev, 0);  in ssc_probe()
238 	if (!ssc->irq) {  in ssc_probe()
244 	list_add_tail(&ssc->list, &ssc_list);  in ssc_probe()
247 	platform_set_drvdata(pdev, ssc);  in ssc_probe()
249 	dev_info(&pdev->dev, "Atmel SSC device at 0x%p (irq %d)\n",  in ssc_probe()
250 			ssc->regs, ssc->irq);  in ssc_probe()
252 	if (ssc_sound_dai_probe(ssc))  in ssc_probe()
253 		dev_err(&pdev->dev, "failed to auto-setup ssc for audio\n");  in ssc_probe()
260 	struct ssc_device *ssc = platform_get_drvdata(pdev);  in ssc_remove()  local
262 	ssc_sound_dai_remove(ssc);  in ssc_remove()
265 	list_del(&ssc->list);  in ssc_remove()
273 		.name		= "ssc",
283 MODULE_DESCRIPTION("SSC driver for Atmel AVR32 and AT91");
285 MODULE_ALIAS("platform:ssc");