android_kernel_samsung_sm8650-modules/dsp/audio_ssr.c

/* Copyright (c) 2016, The Linux Foundation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/module.h>
#include <soc/qcom/subsystem_restart.h>
#include <soc/qcom/subsystem_notif.h>
#include "audio_ssr.h"

static char *audio_ssr_domains[] = {
	"adsp",
	"modem"
};

/**
 * audio_ssr_register -
 *        register to SSR framework
 *
 * @domain_id: Domain ID to register with
 * @nb: notifier block
 *
 * Returns handle pointer on success or error PTR on failure
 */
void *audio_ssr_register(int domain_id, struct notifier_block *nb)
{
	if ((domain_id < 0) ||
	    (domain_id >= AUDIO_SSR_DOMAIN_MAX)) {
		pr_err("%s: Invalid service ID %d\n", __func__, domain_id);
		return ERR_PTR(-EINVAL);
	}

	return subsys_notif_register_notifier(
		audio_ssr_domains[domain_id], nb);
}
EXPORT_SYMBOL(audio_ssr_register);

/**
 * audio_ssr_deregister -
 *        Deregister handle from SSR framework
 *
 * @handle: SSR handle
 * @nb: notifier block
 *
 * Returns 0 on success or error on failure
 */
int audio_ssr_deregister(void *handle, struct notifier_block *nb)
{
	return subsys_notif_unregister_notifier(handle, nb);
}
EXPORT_SYMBOL(audio_ssr_deregister);