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