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tee: add tee_device_set_dev_groups()

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Add tee_device_set_dev_groups() to TEE drivers to supply driver specific
attribute groups. The class specific attributes are from now on added
via the tee_class, which currently only consist of implementation_id.

Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Link: https://lore.kernel.org/r/20240814153558.708365-4-jens.wiklander@linaro.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Jens Wiklander 2024-08-14 17:35:57 +02:00 committed by Ulf Hansson
parent 7852028a35
commit c30b855e81
2 changed files with 25 additions and 6 deletions
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19
drivers/tee/tee_core.c
View File

@ -40,10 +40,7 @@ static const uuid_t tee_client_uuid_ns = UUID_INIT(0x58ac9ca0, 0x2086, 0x4683,
static DECLARE_BITMAP(dev_mask, TEE_NUM_DEVICES);
static DEFINE_SPINLOCK(driver_lock);
static const struct class tee_class = {
.name = "tee",
};
static const struct class tee_class;
static dev_t tee_devt;
struct tee_context *teedev_open(struct tee_device *teedev)
@ -965,6 +962,13 @@ err:
}
EXPORT_SYMBOL_GPL(tee_device_alloc);
void tee_device_set_dev_groups(struct tee_device *teedev,
const struct attribute_group **dev_groups)
{
teedev->dev.groups = dev_groups;
}
EXPORT_SYMBOL_GPL(tee_device_set_dev_groups);
static ssize_t implementation_id_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@ -983,6 +987,11 @@ static struct attribute *tee_dev_attrs[] = {
ATTRIBUTE_GROUPS(tee_dev);
static const struct class tee_class = {
.name = "tee",
.dev_groups = tee_dev_groups,
};
/**
* tee_device_register() - Registers a TEE device
* @teedev: Device to register
@ -1001,8 +1010,6 @@ int tee_device_register(struct tee_device *teedev)
return -EINVAL;
}
teedev->dev.groups = tee_dev_groups;
rc = cdev_device_add(&teedev->cdev, &teedev->dev);
if (rc) {
dev_err(&teedev->dev,

12
include/linux/tee_core.h
View File

@ -154,6 +154,18 @@ int tee_device_register(struct tee_device *teedev);
*/
void tee_device_unregister(struct tee_device *teedev);
/**
* tee_device_set_dev_groups() - Set device attribute groups
* @teedev: Device to register
* @dev_groups: Attribute groups
*
* Assigns the provided @dev_groups to the @teedev to be registered later
* with tee_device_register(). Calling this function is optional, but if
* it's called it must be called before tee_device_register().
*/
void tee_device_set_dev_groups(struct tee_device *teedev,
const struct attribute_group **dev_groups);
/**
* tee_session_calc_client_uuid() - Calculates client UUID for session
* @uuid: Resulting UUID