44 lines
1.0 KiB
C
44 lines
1.0 KiB
C
/*
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* Copyright (c) 2022, Commonwealth Scientific and Industrial Research
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* Organisation (CSIRO) ABN 41 687 119 230.
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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 zephyr_bt_hci_entropy
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#include <drivers/entropy.h>
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#include <bluetooth/hci.h>
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#include <string.h>
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static int entropy_bt_init(const struct device *dev)
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{
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/* Nothing to do */
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return 0;
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}
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static int entropy_bt_get_entropy(const struct device *dev,
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uint8_t *buffer, uint16_t length)
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{
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if (!bt_is_ready()) {
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return -EAGAIN;
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}
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return bt_hci_le_rand(buffer, length);
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}
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/* HCI commands cannot be run from an interrupt context */
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static const struct entropy_driver_api entropy_bt_api = {
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.get_entropy = entropy_bt_get_entropy,
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.get_entropy_isr = NULL
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};
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#define ENTROPY_BT_HCI_INIT(inst) \
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DEVICE_DT_INST_DEFINE(inst, entropy_bt_init, \
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NULL, NULL, NULL, \
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PRE_KERNEL_1, \
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CONFIG_KERNEL_INIT_PRIORITY_DEVICE, \
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&entropy_bt_api);
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DT_INST_FOREACH_STATUS_OKAY(ENTROPY_BT_HCI_INIT)
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