Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 1d2e35e7 authored by Fenglin Wu's avatar Fenglin Wu
Browse files

soc: qcom: qpnp-pbs: add an API to trigger single PBS event 



A simple PBS can be triggered by SW writing to SW_TRIGGER (bit 7) in
TRIG_CTL register without passing any parameters through SCRATCH1
register and not waiting on any condition. Also, this simple PBS is more
like a fire and forget and doesn't even need to check on the status
through SCRATCH2 register. Add support for this simple PBS through an
API qpnp_pbs_trigger_single_event().

Change-Id: I8a6448f9be8f84269c6ba5672bead01a152185ad
Signed-off-by: default avatarFenglin Wu <fenglinw@codeaurora.org>
parent c19cc3d7

drivers/soc/qcom/qpnp-pbs.c

+40 −1
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0-only

/*

 * Copyright (c) 2017-2018, The Linux Foundation. All rights reserved.

 * Copyright (c) 2017-2018, 2020, The Linux Foundation. All rights reserved.

 */



#define pr_fmt(fmt)	"PBS: %s: " fmt, __func__
@@ -145,6 +145,45 @@ static int qpnp_pbs_wait_for_ack(struct qpnp_pbs *pbs, u8 bit_pos) 
	return 0;

}



/**

 * qpnp_pbs_trigger_single_event - trigger PBS sequence which is connected

 * directly to SW_TRIGGER bit without using bitmap.

 *

 * Returns = 0 enable SW_TRIGGER in PBS client successfully.

 *

 * Returns < 0 for errors.

 *

 * This function is used to trigger the PBS that is hooked on the

 * SW_TRIGGER directly in PBS client.

 */

int qpnp_pbs_trigger_single_event(struct device_node *dev_node)

{

	struct qpnp_pbs *pbs_dev;

	int rc;



	if (!dev_node)

		return -EINVAL;



	pbs_dev = get_pbs_client_node(dev_node);

	if (IS_ERR(pbs_dev)) {

		rc = PTR_ERR(pbs_dev);

		pr_err("Unable to find the PBS dev_node, rc=%d\n", rc);

		return rc;

	}



	mutex_lock(&pbs_dev->pbs_lock);

	rc = qpnp_pbs_masked_write(pbs_dev, pbs_dev->base +

				PBS_CLIENT_TRIG_CTL, PBS_CLIENT_SW_TRIG_BIT,

				PBS_CLIENT_SW_TRIG_BIT);

	if (rc < 0)

		pr_err("Failed to write register %x rc=%d\n",

				PBS_CLIENT_TRIG_CTL, rc);

	mutex_unlock(&pbs_dev->pbs_lock);



	return rc;

}

EXPORT_SYMBOL(qpnp_pbs_trigger_single_event);



/**

 * qpnp_pbs_trigger_event - Trigger the PBS RAM sequence

 *

include/linux/qpnp/qpnp-pbs.h

+10 −1
Original line number Diff line number Diff line
@@ -13,11 +13,20 @@ struct device_node; 


#if IS_ENABLED(CONFIG_QPNP_PBS)

int qpnp_pbs_trigger_event(struct device_node *dev_node, u8 bitmap);

int qpnp_pbs_trigger_single_event(struct device_node *dev_node);

#else

static inline int qpnp_pbs_trigger_event(struct device_node *dev_node,

						 u8 bitmap) {

						 u8 bitmap)

{

	return -ENODEV;

}



static inline int qpnp_pbs_trigger_single_event(

					struct device_node *dev_node)

{

	return -ENODEV;

}



#endif



#endif