blob: 3d75c4dc81d20b97362d4ffef41b59f4a58ea496 [file] [log] [blame]
/*
* Copyright (c) 2017 Linaro Limited.
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <device.h>
#include <random.h>
#include <drivers/rand32.h>
#include <init.h>
#include "fsl_trng.h"
static int random_mcux_trng_get_entropy(struct device *dev, u8_t *buffer,
u16_t length)
{
status_t status;
ARG_UNUSED(dev);
status = TRNG_GetRandomData(TRNG0, buffer, length);
__ASSERT_NO_MSG(!status);
return 0;
}
static const struct random_driver_api random_mcux_trng_api_funcs = {
.get_entropy = random_mcux_trng_get_entropy
};
static int random_mcux_trng_init(struct device *);
DEVICE_AND_API_INIT(random_mcux_trng, CONFIG_RANDOM_NAME,
random_mcux_trng_init, NULL, NULL,
PRE_KERNEL_2, CONFIG_KERNEL_INIT_PRIORITY_DEVICE,
&random_mcux_trng_api_funcs);
static int random_mcux_trng_init(struct device *dev)
{
trng_config_t conf;
status_t status;
ARG_UNUSED(dev);
status = TRNG_GetDefaultConfig(&conf);
__ASSERT_NO_MSG(!status);
status = TRNG_Init(TRNG0, &conf);
__ASSERT_NO_MSG(!status);
return 0;
}
u32_t sys_rand32_get(void)
{
u32_t output;
int rc;
rc = random_mcux_trng_get_entropy(DEVICE_GET(random_mcux_trng),
(u8_t *) &output, sizeof(output));
__ASSERT_NO_MSG(!rc);
return output;
}