blob: 2efe1e2307c8d511911087d50211d01d747f524b [file] [log] [blame]
/*
* 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)