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coresight: cti: Initial CoreSight CTI Driver

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This introduces a baseline CTI driver and associated configuration files.

Uses the platform agnostic naming standard for CoreSight devices, along
with a generic platform probing method that currently supports device
tree descriptions, but allows for the ACPI bindings to be added once these
have been defined for the CTI devices.

Driver will probe for the device on the AMBA bus, and load the CTI driver
on CoreSight ID match to CTI IDs in tables.

Initial sysfs support for enable / disable provided.

Default CTI interconnection data is generated based on hardware
register signal counts, with no additional connection information.

Signed-off-by: Mike Leach <mike.leach@linaro.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200320165303.13681-2-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mike Leach 2020-03-20 10:52:52 -06:00 • committed by Greg Kroah-Hartman
parent c23ff2aa3e
commit 835d722ba1
8 changed files with 809 additions and 0 deletions
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23
include/linux/coresight.h
View file

@ -41,6 +41,7 @@ enum coresight_dev_type {
CORESIGHT_DEV_TYPE_LINKSINK,
CORESIGHT_DEV_TYPE_SOURCE,
CORESIGHT_DEV_TYPE_HELPER,
CORESIGHT_DEV_TYPE_ECT,
};
enum coresight_dev_subtype_sink {
@ -68,6 +69,12 @@ enum coresight_dev_subtype_helper {
CORESIGHT_DEV_SUBTYPE_HELPER_CATU,
};
/* Embedded Cross Trigger (ECT) sub-types */
enum coresight_dev_subtype_ect {
CORESIGHT_DEV_SUBTYPE_ECT_NONE,
CORESIGHT_DEV_SUBTYPE_ECT_CTI,
};
/**
* union coresight_dev_subtype - further characterisation of a type
* @sink_subtype: type of sink this component is, as defined
@ -78,6 +85,8 @@ enum coresight_dev_subtype_helper {
* by @coresight_dev_subtype_source.
* @helper_subtype: type of helper this component is, as defined
* by @coresight_dev_subtype_helper.
* @ect_subtype: type of cross trigger this component is, as
* defined by @coresight_dev_subtype_ect
*/
union coresight_dev_subtype {
/* We have some devices which acts as LINK and SINK */
@ -87,6 +96,7 @@ union coresight_dev_subtype {
};
enum coresight_dev_subtype_source source_subtype;
enum coresight_dev_subtype_helper helper_subtype;
enum coresight_dev_subtype_ect ect_subtype;
};
/**
@ -196,6 +206,7 @@ static struct coresight_dev_list (var) = { \
#define sink_ops(csdev) csdev->ops->sink_ops
#define link_ops(csdev) csdev->ops->link_ops
#define helper_ops(csdev) csdev->ops->helper_ops
#define ect_ops(csdev) csdev->ops->ect_ops
/**
* struct coresight_ops_sink - basic operations for a sink
@ -262,11 +273,23 @@ struct coresight_ops_helper {
int (*disable)(struct coresight_device *csdev, void *data);
};
/**
* struct coresight_ops_ect - Ops for an embedded cross trigger device
*
* @enable : Enable the device
* @disable : Disable the device
*/
struct coresight_ops_ect {
int (*enable)(struct coresight_device *csdev);
int (*disable)(struct coresight_device *csdev);
};
struct coresight_ops {
const struct coresight_ops_sink *sink_ops;
const struct coresight_ops_link *link_ops;
const struct coresight_ops_source *source_ops;
const struct coresight_ops_helper *helper_ops;
const struct coresight_ops_ect *ect_ops;
};
#ifdef CONFIG_CORESIGHT