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7fcf608527
Issue: ELE TRNG register with hwrng and open a kthread which remains running after suspend also and results in random interrupts from ELE. Fix: unregister hwrng in suspend and re-register in resume Signed-off-by: Meenakshi Aggarwal <meenakshi.aggarwal@nxp.com> Reviewed-by: Pankaj Gupta <pankaj.gupta@nxp.com>
53 lines
1015 B
C
53 lines
1015 B
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* ELE Random Number Generator Driver NXP's Platforms
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*
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* Copyright 2024-2025 NXP
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*/
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#include "ele_trng.h"
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#include "ele_fw_api.h"
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struct ele_trng {
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struct hwrng rng;
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struct se_if_priv *priv;
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};
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static struct ele_trng trng;
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int ele_trng_init(struct se_if_priv *priv)
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{
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int ret;
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trng.priv = priv;
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trng.rng.name = "ele-trng";
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trng.rng.read = ele_get_hwrng;
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trng.rng.priv = (unsigned long)&trng;
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trng.rng.quality = 1024;
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dev_dbg(priv->dev, "registering ele-trng\n");
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ret = hwrng_register(&trng.rng);
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if (ret)
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return ret;
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dev_info(priv->dev, "Successfully registered ele-trng\n");
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return 0;
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}
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int ele_trng_exit(struct se_if_priv *priv)
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{
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hwrng_unregister(&trng.rng);
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dev_info(priv->dev, "Successfully unregistered ele-trng\n");
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return 0;
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}
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int ele_get_hwrng(struct hwrng *rng,
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void *data, size_t len, bool wait)
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{
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struct ele_trng *trng = (struct ele_trng *)rng->priv;
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return ele_get_random(trng->priv, data, len);
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}
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