43 static bool atmel_trng_wait_ready(struct atmel_trng *trng, bool wait)  in atmel_trng_wait_ready()  argument
47 	ready = readl(trng->base + TRNG_ISR) & TRNG_ISR_DATRDY;  in atmel_trng_wait_ready()
49 		readl_poll_timeout(trng->base + TRNG_ISR, ready,  in atmel_trng_wait_ready()
58 	struct atmel_trng *trng = container_of(rng, struct atmel_trng, rng);  in atmel_trng_read()  local
62 	ret = pm_runtime_get_sync((struct device *)trng->rng.priv);  in atmel_trng_read()
64 		pm_runtime_put_sync((struct device *)trng->rng.priv);  in atmel_trng_read()
68 	ret = atmel_trng_wait_ready(trng, wait);  in atmel_trng_read()
72 	*data = readl(trng->base + TRNG_ODATA);  in atmel_trng_read()
78 	readl(trng->base + TRNG_ISR);  in atmel_trng_read()
82 	pm_runtime_mark_last_busy((struct device *)trng->rng.priv);  in atmel_trng_read()
83 	pm_runtime_put_sync_autosuspend((struct device *)trng->rng.priv);  in atmel_trng_read()
87 static int atmel_trng_init(struct atmel_trng *trng)  in atmel_trng_init()  argument
92 	ret = clk_prepare_enable(trng->clk);  in atmel_trng_init()
96 	if (trng->has_half_rate) {  in atmel_trng_init()
97 		rate = clk_get_rate(trng->clk);  in atmel_trng_init()
101 			writel(TRNG_HALFR, trng->base + TRNG_MR);  in atmel_trng_init()
104 	writel(TRNG_KEY | 1, trng->base + TRNG_CR);  in atmel_trng_init()
109 static void atmel_trng_cleanup(struct atmel_trng *trng)  in atmel_trng_cleanup()  argument
111 	writel(TRNG_KEY, trng->base + TRNG_CR);  in atmel_trng_cleanup()
112 	clk_disable_unprepare(trng->clk);  in atmel_trng_cleanup()
117 	struct atmel_trng *trng;  in atmel_trng_probe()  local
121 	trng = devm_kzalloc(&pdev->dev, sizeof(*trng), GFP_KERNEL);  in atmel_trng_probe()
122 	if (!trng)  in atmel_trng_probe()
125 	trng->base = devm_platform_ioremap_resource(pdev, 0);  in atmel_trng_probe()
126 	if (IS_ERR(trng->base))  in atmel_trng_probe()
127 		return PTR_ERR(trng->base);  in atmel_trng_probe()
129 	trng->clk = devm_clk_get(&pdev->dev, NULL);  in atmel_trng_probe()
130 	if (IS_ERR(trng->clk))  in atmel_trng_probe()
131 		return PTR_ERR(trng->clk);  in atmel_trng_probe()
136 	trng->has_half_rate = data->has_half_rate;  in atmel_trng_probe()
137 	trng->rng.name = pdev->name;  in atmel_trng_probe()
138 	trng->rng.read = atmel_trng_read;  in atmel_trng_probe()
139 	trng->rng.priv = (unsigned long)&pdev->dev;  in atmel_trng_probe()
140 	platform_set_drvdata(pdev, trng);  in atmel_trng_probe()
143 	ret = atmel_trng_init(trng);  in atmel_trng_probe()
152 	ret = devm_hwrng_register(&pdev->dev, &trng->rng);  in atmel_trng_probe()
157 		atmel_trng_cleanup(trng);  in atmel_trng_probe()
166 	struct atmel_trng *trng = platform_get_drvdata(pdev);  in atmel_trng_remove()  local
168 	atmel_trng_cleanup(trng);  in atmel_trng_remove()
175 	struct atmel_trng *trng = dev_get_drvdata(dev);  in atmel_trng_runtime_suspend()  local
177 	atmel_trng_cleanup(trng);  in atmel_trng_runtime_suspend()
184 	struct atmel_trng *trng = dev_get_drvdata(dev);  in atmel_trng_runtime_resume()  local
186 	return atmel_trng_init(trng);  in atmel_trng_runtime_resume()
206 		.compatible = "atmel,at91sam9g45-trng",
209 		.compatible = "microchip,sam9x60-trng",
221 		.name	= "atmel-trng",