mirror of
https://github.com/zephyrproject-rtos/zephyr
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0b5e17f69b
add support SCE9 to entropy driver for Renesas RA Signed-off-by: Minh Hoang <minh.hoang.wm@bp.renesas.com> Signed-off-by: The Nguyen <the.nguyen.yf@renesas.com>
55 lines
1.4 KiB
C
55 lines
1.4 KiB
C
/*
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* Copyright (c) 2024 Renesas Electronics Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <soc.h>
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#include <zephyr/drivers/entropy.h>
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#include "hw_sce_trng_private.h"
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#include "hw_sce_private.h"
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static int entropy_renesas_ra_get_entropy(const struct device *dev, uint8_t *buf, uint16_t len)
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{
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ARG_UNUSED(dev);
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if (buf == NULL) {
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return -EINVAL;
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}
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while (len > 0) {
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uint32_t n[4];
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const uint32_t to_copy = MIN(sizeof(n), len);
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if (FSP_SUCCESS != HW_SCE_RNG_Read(n)) {
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return -ENODATA;
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}
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memcpy(buf, n, to_copy);
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buf += to_copy;
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len -= to_copy;
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}
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return 0;
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}
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static DEVICE_API(entropy, entropy_renesas_ra_api) = {
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.get_entropy = entropy_renesas_ra_get_entropy,
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};
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static int entropy_renesas_ra_init(const struct device *dev)
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{
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HW_SCE_McuSpecificInit();
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return 0;
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}
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#define RENESAS_RA_ENTROPY_INIT(nodeid) \
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DEVICE_DT_DEFINE(nodeid, entropy_renesas_ra_init, NULL, NULL, NULL, PRE_KERNEL_1, \
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CONFIG_ENTROPY_INIT_PRIORITY, &entropy_renesas_ra_api)
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DT_FOREACH_STATUS_OKAY(renesas_ra_rsip_e51a_trng, RENESAS_RA_ENTROPY_INIT)
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DT_FOREACH_STATUS_OKAY(renesas_ra_sce5_rng, RENESAS_RA_ENTROPY_INIT)
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DT_FOREACH_STATUS_OKAY(renesas_ra_sce7_rng, RENESAS_RA_ENTROPY_INIT)
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DT_FOREACH_STATUS_OKAY(renesas_ra_sce9_rng, RENESAS_RA_ENTROPY_INIT)
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DT_FOREACH_STATUS_OKAY(renesas_ra_trng, RENESAS_RA_ENTROPY_INIT)
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