| /* |
| * Copyright (c) 2021 Safran Passenger Innovations Germany GmbH |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #define DT_DRV_COMPAT silabs_gecko_semailbox |
| |
| #include <zephyr/drivers/entropy.h> |
| #include <soc.h> |
| #include "em_cmu.h" |
| #include "sl_se_manager.h" |
| #include "sl_se_manager_entropy.h" |
| |
| |
| static int entropy_gecko_se_get_entropy(const struct device *dev, |
| uint8_t *buffer, |
| uint16_t length) |
| { |
| ARG_UNUSED(dev); |
| |
| int err = 0; |
| sl_status_t status; |
| sl_se_command_context_t cmd_ctx; |
| |
| status = sl_se_init_command_context(&cmd_ctx); |
| |
| if (status == SL_STATUS_OK) { |
| status = sl_se_get_random(&cmd_ctx, buffer, length); |
| |
| if (status != SL_STATUS_OK) { |
| err = -EIO; |
| } |
| |
| sl_se_deinit_command_context(&cmd_ctx); |
| } else { |
| err = -EIO; |
| } |
| |
| return err; |
| } |
| |
| static int entropy_gecko_se_get_entropy_isr(const struct device *dev, |
| uint8_t *buf, |
| uint16_t len, uint32_t flags) |
| { |
| return -ENOTSUP; |
| } |
| |
| static int entropy_gecko_se_init(const struct device *dev) |
| { |
| if (sl_se_init()) { |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| static const struct entropy_driver_api entropy_gecko_se_api_funcs = { |
| .get_entropy = entropy_gecko_se_get_entropy, |
| .get_entropy_isr = entropy_gecko_se_get_entropy_isr |
| }; |
| |
| #define GECKO_SE_INIT(n) \ |
| DEVICE_DT_INST_DEFINE(n, \ |
| entropy_gecko_se_init, NULL, \ |
| NULL, NULL, \ |
| PRE_KERNEL_1, CONFIG_ENTROPY_INIT_PRIORITY, \ |
| &entropy_gecko_se_api_funcs); \ |
| |
| DT_INST_FOREACH_STATUS_OKAY(GECKO_SE_INIT) |