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Commit 9abb9327 authored by Mao Jinlong's avatar Mao Jinlong Committed by Gerrit - the friendly Code Review server
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coresight: tpda: Add cmbchan_mode sysfs node 



Add cmbchan_mode sysfs node to config the TPDA_CR.CMBCHANMODE bit.

Change-Id: I6c8d38114339934b70107beefd92cff53fb63f1c
Signed-off-by: default avatarMao Jinlong <jinlmao@codeaurora.org>
parent 7a89999d

drivers/hwtracing/coresight/coresight-tpda.c

+38 −1
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0-only

/*

 * Copyright (c) 2014-2018, The Linux Foundation. All rights reserved.

 * Copyright (c) 2014-2019, The Linux Foundation. All rights reserved.

 */



#include <linux/kernel.h>
@@ -59,6 +59,7 @@ struct tpda_drvdata { 
	bool			freq_ts;

	uint32_t		freq_req_val;

	bool			freq_req;

	bool			cmbchan_mode;

};



static void __tpda_enable_pre_port(struct tpda_drvdata *drvdata)
@@ -86,6 +87,10 @@ static void __tpda_enable_pre_port(struct tpda_drvdata *drvdata) 
		val = val | BIT(2);

	else

		val = val & ~BIT(2);

	if (drvdata->cmbchan_mode)

		val = val | BIT(20);

	else

		val = val & ~BIT(20);

	tpda_writel(drvdata, val, TPDA_CR);



	/*
@@ -507,6 +512,37 @@ static ssize_t port_flush_req_store(struct device *dev, 
}

static DEVICE_ATTR_RW(port_flush_req);



static ssize_t cmbchan_mode_show(struct device *dev,

					     struct device_attribute *attr,

					     char *buf)

{

	struct tpda_drvdata *drvdata = dev_get_drvdata(dev->parent);



	return scnprintf(buf, PAGE_SIZE, "%u\n",

			 (unsigned int)drvdata->cmbchan_mode);

}



static ssize_t cmbchan_mode_store(struct device *dev,

					      struct device_attribute *attr,

					      const char *buf,

					      size_t size)

{

	struct tpda_drvdata *drvdata = dev_get_drvdata(dev->parent);

	bool val;



	if (kstrtobool(buf, &val))

		return -EINVAL;



	mutex_lock(&drvdata->lock);

	if (val)

		drvdata->cmbchan_mode = true;

	else

		drvdata->cmbchan_mode = false;

	mutex_unlock(&drvdata->lock);

	return size;

}

static DEVICE_ATTR_RW(cmbchan_mode);



static struct attribute *tpda_attrs[] = {

	&dev_attr_trig_async_enable.attr,

	&dev_attr_trig_flag_ts_enable.attr,
@@ -516,6 +552,7 @@ static struct attribute *tpda_attrs[] = { 
	&dev_attr_freq_req.attr,

	&dev_attr_global_flush_req.attr,

	&dev_attr_port_flush_req.attr,

	&dev_attr_cmbchan_mode.attr,

	NULL,

};