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Commit 42704c8c authored by Rishi Gupta's avatar Rishi Gupta Committed by Gerrit - the friendly Code Review server
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soc: qcom: sideband: add helper APIs for sideband notifications 



This commit introduces helper APIs and header files to be used
by sideband events publishers and subscribers.

Change-Id: I713b5b2a8dda2309453b433d922546f16a6f7e7e
Signed-off-by: default avatarRishi Gupta <rishgupt@codeaurora.org>
parent 0e7f05f6

drivers/soc/qcom/Kconfig

+9 −0
Original line number Diff line number Diff line
@@ -284,6 +284,15 @@ config SDX_EXT_IPC 


	  If unsure, say N.



config QTI_NOTIFY_SIDEBAND

	tristate "QCOM sideband signalling helper"

	help

	  This provides helper APIs and a header file through which

	  transport layer driver can talk to the sideband driver to

	  assert appropriate sideband signal.



	  If unsure, say N.



config PANIC_ON_GLADIATOR_ERROR

       depends on MSM_GLADIATOR_ERP

       bool "Panic on GLADIATOR error report"

drivers/soc/qcom/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -79,6 +79,7 @@ obj-$(CONFIG_MSM_BGCOM) += bgcom_spi.o 


obj-$(CONFIG_MSM_PERFORMANCE) += msm_performance.o

obj-$(CONFIG_SDX_EXT_IPC) += sdx_ext_ipc.o

obj-$(CONFIG_QTI_NOTIFY_SIDEBAND) += sideband_notify.o



ifdef CONFIG_MSM_SUBSYSTEM_RESTART

       obj-y += subsystem_notif.o

drivers/soc/qcom/sideband_notify.c

0 → 100644
+50 −0
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2020, 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/notifier.h>

#include <soc/qcom/sb_notification.h>



static BLOCKING_NOTIFIER_HEAD(sb_notifier_list);



/**

 * sb_register_evt_listener - registers a notifier callback

 * @nb: pointer to the notifier block for the callback events

 */

int sb_register_evt_listener(struct notifier_block *nb)

{

	return blocking_notifier_chain_register(&sb_notifier_list, nb);

}

EXPORT_SYMBOL(sb_register_evt_listener);



/**

 * sb_unregister_evt_listener - un-registers a notifier callback

 * registered previously.

 * @nb: pointer to the notifier block for the callback events

 */

int sb_unregister_evt_listener(struct notifier_block *nb)

{

	return blocking_notifier_chain_unregister(&sb_notifier_list, nb);

}

EXPORT_SYMBOL(sb_unregister_evt_listener);



/**

 * sb_notifier_call_chain - send events to all registered listeners

 * as received from publishers.

 * @nb: pointer to the notifier block for the callback events

 */

int sb_notifier_call_chain(unsigned long val, void *v)

{

	return blocking_notifier_call_chain(&sb_notifier_list, val, v);

}

EXPORT_SYMBOL(sb_notifier_call_chain);

include/soc/qcom/sb_notification.h

0 → 100644
+56 −0
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2020, 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.

 *

 */



#ifndef _SB_NOTIFICATION_H

#define _SB_NOTIFICATION_H



/* Indicates a system wake up event */

#define EVT_WAKE_UP 0x01



#ifdef CONFIG_QTI_NOTIFY_SIDEBAND

/**

 * sb_register_evt_listener - registers a notifier callback

 * @nb: pointer to the notifier block for the callback events

 */

int sb_register_evt_listener(struct notifier_block *nb);



/**

 * sb_unregister_evt_listener - un-registers a notifier callback

 * registered previously.

 * @nb: pointer to the notifier block for the callback events

 */

int sb_unregister_evt_listener(struct notifier_block *nb);



/**

 * sb_notifier_call_chain - send events to all registered listeners

 * as received from publishers.

 * @nb: pointer to the notifier block for the callback events

 */

int sb_notifier_call_chain(unsigned long val, void *v);

#else

static inline int sb_register_evt_listener(struct notifier_block *nb)

{

	return -EINVAL;

}

static inline int sb_unregister_evt_listener(struct notifier_block *nb)

{

	return -EINVAL;

}

static inline int sb_notifier_call_chain(unsigned long val, void *v)

{

	return -EINVAL;

}

#endif /* !CONFIG_QTI_NOTIFY_SIDEBAND */



#endif /* _SB_NOTIFICATION_H */