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coresight-tmc: add support to set default sink

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Add support to set default sink at probe time.

Change-Id: I62abe39a5cb5e7f8b1bb1198cecd3b529b124de8
Signed-off-by: Shashank Mittal <mittals@codeaurora.org>
This commit is contained in:
Shashank Mittal 2016-03-16 15:06:14 -07:00 • committed by Jeevan Shriram
parent 534fd1b6c4
commit 8185b206af
4 changed files with 22 additions and 1 deletions
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2
Documentation/devicetree/bindings/arm/coresight.txt
View file

@ -68,6 +68,8 @@ its hardware characteristcs.
* arm,buffer-size: size of contiguous buffer space for TMC ETR
(embedded trace router)
* arm,default-sink: represents the default compile time CoreSight sink
* Required property for TPDAs:
* qcom,tpda-atid: must be present. Specifies the ATID for TPDA.

2
drivers/hwtracing/coresight/coresight-tmc.c
View file

@ -1673,6 +1673,8 @@ static int tmc_probe(struct amba_device *adev, const struct amba_id *id)
return -ENOMEM;
}
pdata->default_sink = of_property_read_bool(np, "arm,default-sink");
desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
if (!desc)
return -ENOMEM;

15
drivers/hwtracing/coresight/coresight.c
View file

@ -795,6 +795,21 @@ struct coresight_device *coresight_register(struct coresight_desc *desc)
coresight_fixup_device_conns(csdev);
coresight_fixup_orphan_conns(csdev);
if (csdev->type == CORESIGHT_DEV_TYPE_SINK ||
csdev->type == CORESIGHT_DEV_TYPE_LINKSINK) {
if (desc->pdata->default_sink) {
if (curr_sink) {
dev_warn(&csdev->dev,
"overwritting curr sink %s",
dev_name(&curr_sink->dev));
curr_sink->activated = false;
}
curr_sink = csdev;
curr_sink->activated = true;
}
}
mutex_unlock(&coresight_mutex);
return csdev;

4
include/linux/coresight.h
View file

@ -1,4 +1,4 @@
/* Copyright (c) 2012, The Linux Foundation. All rights reserved.
/* Copyright (c) 2012, 2016 The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@ -101,6 +101,7 @@ struct coresight_dev_subtype {
connected to.
* @nr_outport: number of output ports for this component.
* @clk: The clock this component is associated to.
* @default_sink: Flag to set default sink
*/
struct coresight_platform_data {
int cpu;
@ -111,6 +112,7 @@ struct coresight_platform_data {
int *child_ports;
int nr_outport;
struct clk *clk;
bool default_sink;
};
/**