Commit 8c75d585 authored by Deepak Kumar Singh's avatar Deepak Kumar Singh Committed by Bjorn Andersson
Browse files

soc: qcom: aoss: Expose send for generic usecase 



Not all upcoming usecases will have an interface to allow the aoss
driver to hook onto. Expose the send api and create a get function to
enable drivers to send their own messages to aoss.

Signed-off-by: default avatarChris Lew <clew@codeaurora.org>
Signed-off-by: default avatarDeepak Kumar Singh <deesin@codeaurora.org>
Reviewed-by: default avatarStephen Boyd <swboyd@chromium.org>
Signed-off-by: default avatarBjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/1630420228-31075-2-git-send-email-deesin@codeaurora.org
parent 6880fa6c

drivers/soc/qcom/qcom_aoss.c

+53 −1
Original line number Diff line number Diff line
@@ -8,10 +8,12 @@ 
#include <linux/io.h>

#include <linux/mailbox_client.h>

#include <linux/module.h>

#include <linux/of_platform.h>

#include <linux/platform_device.h>

#include <linux/pm_domain.h>

#include <linux/thermal.h>

#include <linux/slab.h>

#include <linux/soc/qcom/qcom_aoss.h>



#define QMP_DESC_MAGIC			0x0

#define QMP_DESC_VERSION		0x4
@@ -223,11 +225,14 @@ static bool qmp_message_empty(struct qmp *qmp) 
 *

 * Return: 0 on success, negative errno on failure

 */

static int qmp_send(struct qmp *qmp, const void *data, size_t len)

int qmp_send(struct qmp *qmp, const void *data, size_t len)

{

	long time_left;

	int ret;



	if (WARN_ON(IS_ERR_OR_NULL(qmp) || !data))

		return -EINVAL;



	if (WARN_ON(len + sizeof(u32) > qmp->size))

		return -EINVAL;
@@ -261,6 +266,7 @@ static int qmp_send(struct qmp *qmp, const void *data, size_t len) 


	return ret;

}

EXPORT_SYMBOL(qmp_send);



static int qmp_qdss_clk_prepare(struct clk_hw *hw)

{
@@ -519,6 +525,51 @@ static void qmp_cooling_devices_remove(struct qmp *qmp) 
		thermal_cooling_device_unregister(qmp->cooling_devs[i].cdev);

}



/**

 * qmp_get() - get a qmp handle from a device

 * @dev: client device pointer

 *

 * Return: handle to qmp device on success, ERR_PTR() on failure

 */

struct qmp *qmp_get(struct device *dev)

{

	struct platform_device *pdev;

	struct device_node *np;

	struct qmp *qmp;



	if (!dev || !dev->of_node)

		return ERR_PTR(-EINVAL);



	np = of_parse_phandle(dev->of_node, "qcom,qmp", 0);

	if (!np)

		return ERR_PTR(-ENODEV);



	pdev = of_find_device_by_node(np);

	of_node_put(np);

	if (!pdev)

		return ERR_PTR(-EINVAL);



	qmp = platform_get_drvdata(pdev);



	return qmp ? qmp : ERR_PTR(-EPROBE_DEFER);

}

EXPORT_SYMBOL(qmp_get);



/**

 * qmp_put() - release a qmp handle

 * @qmp: qmp handle obtained from qmp_get()

 */

void qmp_put(struct qmp *qmp)

{

	/*

	 * Match get_device() inside of_find_device_by_node() in

	 * qmp_get()

	 */

	if (!IS_ERR_OR_NULL(qmp))

		put_device(qmp->dev);

}

EXPORT_SYMBOL(qmp_put);



static int qmp_probe(struct platform_device *pdev)

{

	struct resource *res;
@@ -615,6 +666,7 @@ static struct platform_driver qmp_driver = { 
	.driver = {

		.name		= "qcom_aoss_qmp",

		.of_match_table	= qmp_dt_match,

		.suppress_bind_attrs = true,

	},

	.probe = qmp_probe,

	.remove	= qmp_remove,

include/linux/soc/qcom/qcom_aoss.h

0 → 100644
+38 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0-only */

/*

 * Copyright (c) 2021, The Linux Foundation. All rights reserved.

 */



#ifndef __QCOM_AOSS_H__

#define __QCOM_AOSS_H__



#include <linux/err.h>

#include <linux/device.h>



struct qmp;



#if IS_ENABLED(CONFIG_QCOM_AOSS_QMP)



int qmp_send(struct qmp *qmp, const void *data, size_t len);

struct qmp *qmp_get(struct device *dev);

void qmp_put(struct qmp *qmp);



#else



static inline int qmp_send(struct qmp *qmp, const void *data, size_t len)

{

	return -ENODEV;

}



static inline struct qmp *qmp_get(struct device *dev)

{

	return ERR_PTR(-ENODEV);

}



static inline void qmp_put(struct qmp *qmp)

{

}



#endif



#endif