linux-kernel - [PATCH 2/6] platform/x86/intel/tpmi: Add API to get debugfs root

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Date: Mon, 27 May 2024 16:29:34 +0300
From: Tero Kristo <tero.kristo@...ux.intel.com>
To: srinivas.pandruvada@...ux.intel.com,
	ilpo.jarvinen@...ux.intel.com,
	hdegoede@...hat.com
Cc: linux-kernel@...r.kernel.org,
	platform-driver-x86@...r.kernel.org,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH 2/6] 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@...ux.intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Signed-off-by: Tero Kristo <tero.kristo@...ux.intel.com>
---
 drivers/platform/x86/intel/tpmi.c | 9 +++++++++
 include/linux/intel_tpmi.h        | 1 +
 2 files changed, 10 insertions(+)

diff --git a/drivers/platform/x86/intel/tpmi.c b/drivers/platform/x86/intel/tpmi.c
index c2ef2cd587ba..83e8b1fe53b3 100644
--- 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 a88ac937d2c2..ff480b47ae64 100644
--- 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
-- 
2.43.1