1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
22 	struct hwrng rng;  member
26 static int meson_rng_read(struct hwrng *rng, void *buf, size_t max, bool wait)  in meson_rng_read()  argument
29 			container_of(rng, struct meson_rng_data, rng);  in meson_rng_read()
31 	*(u32 *)buf = readl_relaxed(data->base + RNG_DATA);  in meson_rng_read()
43 	struct device *dev = &pdev->dev;  in meson_rng_probe()
49 		return -ENOMEM;  in meson_rng_probe()
51 	data->pdev = pdev;  in meson_rng_probe()
53 	data->base = devm_platform_ioremap_resource(pdev, 0);  in meson_rng_probe()
54 	if (IS_ERR(data->base))  in meson_rng_probe()
55 		return PTR_ERR(data->base);  in meson_rng_probe()
57 	data->core_clk = devm_clk_get(dev, "core");  in meson_rng_probe()
58 	if (IS_ERR(data->core_clk))  in meson_rng_probe()
59 		data->core_clk = NULL;  in meson_rng_probe()
61 	if (data->core_clk) {  in meson_rng_probe()
62 		ret = clk_prepare_enable(data->core_clk);  in meson_rng_probe()
66 					       data->core_clk);  in meson_rng_probe()
71 	data->rng.name = pdev->name;  in meson_rng_probe()
72 	data->rng.read = meson_rng_read;  in meson_rng_probe()
76 	return devm_hwrng_register(dev, &data->rng);  in meson_rng_probe()
80 	{ .compatible = "amlogic,meson-rng", },
88 		.name = "meson-rng",
95 MODULE_DESCRIPTION("Meson H/W Random Number Generator driver");