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intel_th: Allow subdevice drivers to bring in own attribute groups
Some subdevices (MSU, PTI) need to register their own driver-specific attribute groups. Provide a way for those to pass their attribute groups to the core driver in their driver structure so that the core can take care of creating and removing them. Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Reviewed-by: Laurent Fert <laurent.fert@intel.com>
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2 changed files with 15 additions and 0 deletions
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@ -71,6 +71,15 @@ static int intel_th_probe(struct device *dev)
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if (ret)
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return ret;
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if (thdrv->attr_group) {
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ret = sysfs_create_group(&thdev->dev.kobj, thdrv->attr_group);
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if (ret) {
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thdrv->remove(thdev);
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return ret;
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}
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}
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if (thdev->type == INTEL_TH_OUTPUT &&
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!intel_th_output_assigned(thdev))
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ret = hubdrv->assign(hub, thdev);
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@ -91,6 +100,9 @@ static int intel_th_remove(struct device *dev)
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return err;
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}
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if (thdrv->attr_group)
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sysfs_remove_group(&thdev->dev.kobj, thdrv->attr_group);
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thdrv->remove(thdev);
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if (intel_th_output_assigned(thdev)) {
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@ -115,6 +115,7 @@ intel_th_output_assigned(struct intel_th_device *thdev)
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* @enable: enable tracing for a given output device
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* @disable: disable tracing for a given output device
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* @fops: file operations for device nodes
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* @attr_group: attributes provided by the driver
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*
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* Callbacks @probe and @remove are required for all device types.
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* Switch device driver needs to fill in @assign, @enable and @disable
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@ -139,6 +140,8 @@ struct intel_th_driver {
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void (*deactivate)(struct intel_th_device *thdev);
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/* file_operations for those who want a device node */
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const struct file_operations *fops;
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/* optional attributes */
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struct attribute_group *attr_group;
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/* source ops */
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int (*set_output)(struct intel_th_device *thdev,
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