mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-22 00:40:03 +00:00
![Suzuki K Poulose](/assets/img/avatar_default.png)
Convert component enable/disable messages from dev_info to dev_dbg. When used with perf, the components in the paths are enabled/disabled during each schedule of the run, which can flood the dmesg with these messages. Moreover, they are only useful for debug purposes. So, convert such messages to dev_dbg() which can be turned on as needed. Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
156 lines
3.8 KiB
C
156 lines
3.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright (c) 2011-2012, The Linux Foundation. All rights reserved.
|
|
*
|
|
* Description: CoreSight Replicator driver
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/device.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/io.h>
|
|
#include <linux/err.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/pm_runtime.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/of.h>
|
|
#include <linux/coresight.h>
|
|
|
|
#include "coresight-priv.h"
|
|
|
|
/**
|
|
* struct replicator_drvdata - specifics associated to a replicator component
|
|
* @dev: the device entity associated with this component
|
|
* @atclk: optional clock for the core parts of the replicator.
|
|
* @csdev: component vitals needed by the framework
|
|
*/
|
|
struct replicator_drvdata {
|
|
struct device *dev;
|
|
struct clk *atclk;
|
|
struct coresight_device *csdev;
|
|
};
|
|
|
|
static int replicator_enable(struct coresight_device *csdev, int inport,
|
|
int outport)
|
|
{
|
|
struct replicator_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
|
|
|
|
dev_dbg(drvdata->dev, "REPLICATOR enabled\n");
|
|
return 0;
|
|
}
|
|
|
|
static void replicator_disable(struct coresight_device *csdev, int inport,
|
|
int outport)
|
|
{
|
|
struct replicator_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
|
|
|
|
dev_dbg(drvdata->dev, "REPLICATOR disabled\n");
|
|
}
|
|
|
|
static const struct coresight_ops_link replicator_link_ops = {
|
|
.enable = replicator_enable,
|
|
.disable = replicator_disable,
|
|
};
|
|
|
|
static const struct coresight_ops replicator_cs_ops = {
|
|
.link_ops = &replicator_link_ops,
|
|
};
|
|
|
|
static int replicator_probe(struct platform_device *pdev)
|
|
{
|
|
int ret;
|
|
struct device *dev = &pdev->dev;
|
|
struct coresight_platform_data *pdata = NULL;
|
|
struct replicator_drvdata *drvdata;
|
|
struct coresight_desc desc = { 0 };
|
|
struct device_node *np = pdev->dev.of_node;
|
|
|
|
if (np) {
|
|
pdata = of_get_coresight_platform_data(dev, np);
|
|
if (IS_ERR(pdata))
|
|
return PTR_ERR(pdata);
|
|
pdev->dev.platform_data = pdata;
|
|
}
|
|
|
|
drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
|
|
if (!drvdata)
|
|
return -ENOMEM;
|
|
|
|
drvdata->dev = &pdev->dev;
|
|
drvdata->atclk = devm_clk_get(&pdev->dev, "atclk"); /* optional */
|
|
if (!IS_ERR(drvdata->atclk)) {
|
|
ret = clk_prepare_enable(drvdata->atclk);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
pm_runtime_get_noresume(&pdev->dev);
|
|
pm_runtime_set_active(&pdev->dev);
|
|
pm_runtime_enable(&pdev->dev);
|
|
platform_set_drvdata(pdev, drvdata);
|
|
|
|
desc.type = CORESIGHT_DEV_TYPE_LINK;
|
|
desc.subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_SPLIT;
|
|
desc.ops = &replicator_cs_ops;
|
|
desc.pdata = pdev->dev.platform_data;
|
|
desc.dev = &pdev->dev;
|
|
drvdata->csdev = coresight_register(&desc);
|
|
if (IS_ERR(drvdata->csdev)) {
|
|
ret = PTR_ERR(drvdata->csdev);
|
|
goto out_disable_pm;
|
|
}
|
|
|
|
pm_runtime_put(&pdev->dev);
|
|
|
|
return 0;
|
|
|
|
out_disable_pm:
|
|
if (!IS_ERR(drvdata->atclk))
|
|
clk_disable_unprepare(drvdata->atclk);
|
|
pm_runtime_put_noidle(&pdev->dev);
|
|
pm_runtime_disable(&pdev->dev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int replicator_runtime_suspend(struct device *dev)
|
|
{
|
|
struct replicator_drvdata *drvdata = dev_get_drvdata(dev);
|
|
|
|
if (drvdata && !IS_ERR(drvdata->atclk))
|
|
clk_disable_unprepare(drvdata->atclk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int replicator_runtime_resume(struct device *dev)
|
|
{
|
|
struct replicator_drvdata *drvdata = dev_get_drvdata(dev);
|
|
|
|
if (drvdata && !IS_ERR(drvdata->atclk))
|
|
clk_prepare_enable(drvdata->atclk);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static const struct dev_pm_ops replicator_dev_pm_ops = {
|
|
SET_RUNTIME_PM_OPS(replicator_runtime_suspend,
|
|
replicator_runtime_resume, NULL)
|
|
};
|
|
|
|
static const struct of_device_id replicator_match[] = {
|
|
{.compatible = "arm,coresight-replicator"},
|
|
{}
|
|
};
|
|
|
|
static struct platform_driver replicator_driver = {
|
|
.probe = replicator_probe,
|
|
.driver = {
|
|
.name = "coresight-replicator",
|
|
.of_match_table = replicator_match,
|
|
.pm = &replicator_dev_pm_ops,
|
|
.suppress_bind_attrs = true,
|
|
},
|
|
};
|
|
builtin_platform_driver(replicator_driver);
|