bh_efuse.h

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/*
 * Copyright (c) 2026 Tenstorrent AI ULC
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
#ifndef ZEPHYR_INCLUDE_DRIVERS_MISC_BH_EFUSE_H_
#define ZEPHYR_INCLUDE_DRIVERS_MISC_BH_EFUSE_H_
 
#include <errno.h>
#include <stdint.h>
 
#include <zephyr/device.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
enum tt_bh_efuse_box_id {
        TT_BH_EFUSE_BOX_DFT0 = 0,
        TT_BH_EFUSE_BOX_DFT1 = 1,
        TT_BH_EFUSE_BOX_FUNC = 2,
        TT_BH_EFUSE_BOX_ID_NUM = 3,
};
 
enum tt_bh_efuse_access_type {
        TT_BH_EFUSE_ACCESS_INDIRECT = 0,
        TT_BH_EFUSE_ACCESS_DIRECT = 1,
};
 
__subsystem struct tt_efuse_driver_api {
        int (*read)(const struct device *dev, enum tt_bh_efuse_access_type acc_type,
                    enum tt_bh_efuse_box_id box_id, uint32_t offset, uint32_t *value);
};
 
static inline int tt_bh_efuse_read(const struct device *dev, enum tt_bh_efuse_access_type acc_type,
                                   enum tt_bh_efuse_box_id box_id, uint32_t offset, uint32_t *value)
{
        if (value == NULL) {
                return -EINVAL;
        }
 
        if (dev == NULL || !device_is_ready(dev)) {
                return -ENODEV;
        }
 
        const struct tt_efuse_driver_api *api = DEVICE_API_GET(tt_efuse, dev);
 
        if (api == NULL || api->read == NULL) {
                return -ENOSYS;
        }
 
        return api->read(dev, acc_type, box_id, offset, value);
}
 
#ifdef __cplusplus
}
#endif
 
#endif /* ZEPHYR_INCLUDE_DRIVERS_MISC_BH_EFUSE_H_ */