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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2019, The Linaro Limited. All rights reserved.
*/
#include <linux/of.h>
#include "coresight-cti.h"
/* get the hardware configuration & connection data. */
int cti_plat_get_hw_data(struct device *dev,
struct cti_drvdata *drvdata)
{
int rc = 0;
struct cti_device *cti_dev = &drvdata->ctidev;
/* if no connections, just add a single default based on max IN-OUT */
if (cti_dev->nr_trig_con == 0)
rc = cti_add_default_connection(dev, drvdata);
return rc;
}
struct coresight_platform_data *
coresight_cti_get_platform_data(struct device *dev)
{
int ret = -ENOENT;
struct coresight_platform_data *pdata = NULL;
struct fwnode_handle *fwnode = dev_fwnode(dev);
struct cti_drvdata *drvdata = dev_get_drvdata(dev);
if (IS_ERR_OR_NULL(fwnode))
goto error;
/*
* Alloc platform data but leave it zero init. CTI does not use the
* same connection infrastructuree as trace path components but an
* empty struct enables us to use the standard coresight component
* registration code.
*/
pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata) {
ret = -ENOMEM;
goto error;
}
/* get some CTI specifics */
ret = cti_plat_get_hw_data(dev, drvdata);
if (!ret)
return pdata;
error:
return ERR_PTR(ret);
}
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