platform/x86/intel/tpmi: Add API to get debugfs root

Add new API to get the debugfs root directory for TPMI. This allows any
TPMI devices to add their own debugfs items under the same directory
structure.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Tero Kristo <tero.kristo@linux.intel.com>
Link: https://lore.kernel.org/r/20240527133400.483634-3-tero.kristo@linux.intel.com
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

diff --git a/drivers/platform/x86/intel/tpmi.c b/drivers/platform/x86/intel/tpmi.c
index c2ef2cd587ba6f0f6c886f52657541a6c43f4cb2..83e8b1fe53b355b2b562d118177cf95eafeffe0d 100644 (file)
--- a/drivers/platform/x86/intel/tpmi.c
+++ b/drivers/platform/x86/intel/tpmi.c
@@ -357,6 +357,15 @@ int tpmi_get_feature_status(struct auxiliary_device *auxdev,
 }
 EXPORT_SYMBOL_NS_GPL(tpmi_get_feature_status, INTEL_TPMI);
 
+struct dentry *tpmi_get_debugfs_dir(struct auxiliary_device *auxdev)
+{
+       struct intel_vsec_device *intel_vsec_dev = dev_to_ivdev(auxdev->dev.parent);
+       struct intel_tpmi_info *tpmi_info = auxiliary_get_drvdata(&intel_vsec_dev->auxdev);
+
+       return tpmi_info->dbgfs_dir;
+}
+EXPORT_SYMBOL_NS_GPL(tpmi_get_debugfs_dir, INTEL_TPMI);
+
 static int tpmi_pfs_dbg_show(struct seq_file *s, void *unused)
 {
        struct intel_tpmi_info *tpmi_info = s->private;

diff --git a/include/linux/intel_tpmi.h b/include/linux/intel_tpmi.h
index a88ac937d2c294b95d24e302f193b4ea64abb5b1..ff480b47ae642010102cb8c31e3953bb4af41d9d 100644 (file)
--- a/include/linux/intel_tpmi.h
+++ b/include/linux/intel_tpmi.h
@@ -54,4 +54,5 @@ struct resource *tpmi_get_resource_at_index(struct auxiliary_device *auxdev, int
 int tpmi_get_resource_count(struct auxiliary_device *auxdev);
 int tpmi_get_feature_status(struct auxiliary_device *auxdev, int feature_id, bool *read_blocked,
                            bool *write_blocked);
+struct dentry *tpmi_get_debugfs_dir(struct auxiliary_device *auxdev);
 #endif