43a7d26603
Replace CONFIG_ENTROPY_NAME with DT_CHOSEN_ZEPHYR_ENTROPY_LABEL. We now set zephyr,entropy in the chosen node of the device tree to the entropy device. This allows us to remove CONFIG_ENTROPY_NAME from dts_fixup.h. Also remove any other stale ENTROPY related defines in dts_fixup.h files. Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
48 lines
1.0 KiB
C
48 lines
1.0 KiB
C
/*
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* Copyright (c) 2019 Nordic Semiconductor ASA
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <kernel.h>
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#include <string.h>
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#include <drivers/entropy.h>
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#include <logging/log.h>
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#include <openthread/platform/entropy.h>
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#include "platform-zephyr.h"
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LOG_MODULE_REGISTER(net_otPlat_entropy, CONFIG_OPENTHREAD_L2_LOG_LEVEL);
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#if !defined(CONFIG_ENTROPY_HAS_DRIVER)
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#error OpenThread requires an entropy source for a TRNG
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#endif
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otError otPlatEntropyGet(uint8_t *aOutput, uint16_t aOutputLength)
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{
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/* static to obtain it once in a first call */
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static struct device *dev;
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int err;
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if ((aOutput == NULL) || (aOutputLength == 0)) {
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return OT_ERROR_INVALID_ARGS;
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}
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if (dev == NULL) {
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dev = device_get_binding(DT_CHOSEN_ZEPHYR_ENTROPY_LABEL);
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if (dev == NULL) {
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LOG_ERR("Failed to obtain entropy device");
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return OT_ERROR_FAILED;
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}
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}
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err = entropy_get_entropy(dev, aOutput, aOutputLength);
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if (err != 0) {
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LOG_ERR("Failed to obtain entropy, err %d", err);
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return OT_ERROR_FAILED;
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}
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return OT_ERROR_NONE;
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}
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