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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2019 Ahmad Fatoum, Pengutronix
*/
#include <common.h>
#include <init.h>
#include <linux/hw_random.h>
#include <mach/linux.h>
struct devrandom_rnd {
struct hwrng hwrng;
devrandom_t *priv;
};
static inline struct devrandom_rnd *to_rnd(struct hwrng *hwrng)
{
return container_of(hwrng, struct devrandom_rnd, hwrng);
}
static int devrandom_rnd_read(struct hwrng *hwrng, void *buf, size_t max, bool wait)
{
return devrandom_read(to_rnd(hwrng)->priv, buf, max, wait);
}
static int devrandom_rnd_init(struct hwrng *hwrng)
{
devrandom_t *devrandom = devrandom_init();
if (IS_ERR(devrandom))
return PTR_ERR(devrandom);
to_rnd(hwrng)->priv = devrandom;
return 0;
}
static int devrandom_rnd_probe(struct device_d *dev)
{
struct devrandom_rnd *rnd;
int ret;
rnd = xzalloc(sizeof(*rnd));
rnd->hwrng.name = dev->name;
rnd->hwrng.read = devrandom_rnd_read;
rnd->hwrng.init = devrandom_rnd_init;
ret = hwrng_register(dev, &rnd->hwrng);
if (ret) {
dev_err(dev, "failed to register: %s\n", strerror(-ret));
return ret;
}
dev_info(dev, "Registered.\n");
return 0;
}
static struct driver_d devrandom_rnd_driver = {
.name = "devrandom",
.probe = devrandom_rnd_probe,
};
device_platform_driver(devrandom_rnd_driver);
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