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66 lines
1.4 KiB
66 lines
1.4 KiB
/* |
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* Copyright 2019 NXP |
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* |
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* SPDX-License-Identifier: Apache-2.0 |
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*/ |
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#define DT_DRV_COMPAT openisa_rv32m1_trng |
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#include <zephyr/device.h> |
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#include <zephyr/drivers/entropy.h> |
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#include <zephyr/random/random.h> |
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#include <zephyr/init.h> |
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#include "fsl_trng.h" |
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struct rv32m1_entropy_config { |
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TRNG_Type *base; |
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}; |
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static int entropy_rv32m1_trng_get_entropy(const struct device *dev, |
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uint8_t *buffer, |
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uint16_t length) |
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{ |
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const struct rv32m1_entropy_config *config = dev->config; |
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status_t status; |
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ARG_UNUSED(dev); |
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status = TRNG_GetRandomData(config->base, 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 DEVICE_API(entropy, entropy_rv32m1_trng_api_funcs) = { |
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.get_entropy = entropy_rv32m1_trng_get_entropy |
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}; |
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static struct rv32m1_entropy_config entropy_rv32m1_config = { |
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.base = (TRNG_Type *)DT_INST_REG_ADDR(0) |
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}; |
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static int entropy_rv32m1_trng_init(const struct device *); |
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DEVICE_DT_INST_DEFINE(0, |
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entropy_rv32m1_trng_init, NULL, |
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NULL, &entropy_rv32m1_config, |
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PRE_KERNEL_1, CONFIG_ENTROPY_INIT_PRIORITY, |
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&entropy_rv32m1_trng_api_funcs); |
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static int entropy_rv32m1_trng_init(const struct device *dev) |
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{ |
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const struct rv32m1_entropy_config *config = dev->config; |
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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(config->base, &conf); |
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__ASSERT_NO_MSG(!status); |
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return 0; |
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}
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