char/hw_random/pasemi-rng.c

1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (C) 2006-2007 PA Semi, Inc
33 static int pasemi_rng_data_present(struct hwrng *rng, int wait)  in pasemi_rng_data_present()
35 	void __iomem *rng_regs = (void __iomem *)rng->priv;  in pasemi_rng_data_present()
48 static int pasemi_rng_data_read(struct hwrng *rng, u32 *data)  in pasemi_rng_data_read()
50 	void __iomem *rng_regs = (void __iomem *)rng->priv;  in pasemi_rng_data_read()
55 static int pasemi_rng_init(struct hwrng *rng)  in pasemi_rng_init()
57 	void __iomem *rng_regs = (void __iomem *)rng->priv;  in pasemi_rng_init()
67 static void pasemi_rng_cleanup(struct hwrng *rng)  in pasemi_rng_cleanup()
69 	void __iomem *rng_regs = (void __iomem *)rng->priv;  in pasemi_rng_cleanup()
77 static struct hwrng pasemi_rng = {
85 static int rng_probe(struct platform_device *pdev)  in rng_probe()
95 	pr_info("Registering PA Semi RNG\n");  in rng_probe()
96 	return devm_hwrng_register(&pdev->dev, &pasemi_rng);  in rng_probe()
99 static const struct of_device_id rng_match[] = {
100 	{ .compatible      = "1682m-rng", },
101 	{ .compatible      = "pasemi,pwrficient-rng", },
106 static struct platform_driver rng_driver = {
108 		.name = "pasemi-rng",
118 MODULE_DESCRIPTION("H/W RNG driver for PA Semi processor");