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drivers: entropy: mcux_trng: Add PM device action

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The entropy driver shall re-init trng when
a power state turns off the device.

Signed-off-by: Yassine El Aissaoui <yassine.elaissaoui@nxp.com>
This commit is contained in:
Yassine El Aissaoui 2025-03-13 11:08:19 +01:00 committed by Benjamin Cabé
parent 7ef8116969
commit 12e2aeda11
1 changed files with 24 additions and 1 deletions
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25
drivers/entropy/entropy_mcux_trng.c
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@ -1,5 +1,6 @@
/*
* Copyright (c) 2017 Linaro Limited.
* Copyright 2025 NXP
*
* SPDX-License-Identifier: Apache-2.0
*/
@ -9,6 +10,7 @@
#include <zephyr/device.h>
#include <zephyr/drivers/entropy.h>
#include <zephyr/random/random.h>
#include <zephyr/pm/device.h>
#include <zephyr/init.h>
#include "fsl_trng.h"
@ -53,8 +55,29 @@ static int entropy_mcux_trng_init(const struct device *dev)
return 0;
}
#ifdef CONFIG_PM_DEVICE
static int entropy_mcux_trng_pm_action(const struct device *dev, enum pm_device_action action)
{
switch (action) {
case PM_DEVICE_ACTION_RESUME:
break;
case PM_DEVICE_ACTION_SUSPEND:
break;
case PM_DEVICE_ACTION_TURN_OFF:
break;
case PM_DEVICE_ACTION_TURN_ON:
entropy_mcux_trng_init(dev);
break;
default:
return -ENOTSUP;
}
return 0;
}
#endif /*CONFIG_PM_DEVICE*/
PM_DEVICE_DT_INST_DEFINE(0, entropy_mcux_trng_pm_action);
DEVICE_DT_INST_DEFINE(0,
entropy_mcux_trng_init, NULL, NULL,
entropy_mcux_trng_init, PM_DEVICE_DT_INST_GET(0), NULL,
&entropy_mcux_config,
PRE_KERNEL_1, CONFIG_ENTROPY_INIT_PRIORITY,
&entropy_mcux_trng_api_funcs);