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-rw-r--r--Documentation/ABI/testing/sysfs-bus-platform14
1 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-platform b/Documentation/ABI/testing/sysfs-bus-platform
index 194ca700e962..ff30728595ef 100644
--- a/Documentation/ABI/testing/sysfs-bus-platform
+++ b/Documentation/ABI/testing/sysfs-bus-platform
@@ -28,3 +28,17 @@ Description:
value comes from an ACPI _PXM method or a similar firmware
source. Initial users for this file would be devices like
arm smmu which are populated by arm64 acpi_iort.
+
+What: /sys/bus/platform/devices/.../msi_irqs/
+Date: August 2021
+Contact: Barry Song <song.bao.hua@hisilicon.com>
+Description:
+ The /sys/devices/.../msi_irqs directory contains a variable set
+ of files, with each file being named after a corresponding msi
+ irq vector allocated to that device.
+
+What: /sys/bus/platform/devices/.../msi_irqs/<N>
+Date: August 2021
+Contact: Barry Song <song.bao.hua@hisilicon.com>
+Description:
+ This attribute will show "msi" if <N> is a valid msi irq