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

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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: Fenglin Wu <fenglinw@codeaurora.org>
This commit is contained in:
Fenglin Wu 2020-10-28 15:53:43 +08:00
parent 2f5fa560de
commit fc86192fc3
2 changed files with 50 additions and 2 deletions
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41
drivers/soc/qcom/qpnp-pbs.c
View File

@ -1,6 +1,6 @@
// 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
*

11
include/linux/qpnp/qpnp-pbs.h
View File

@ -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