From: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Date: Mon, 27 Sep 2021 13:59:50 +0000 (+0200)
Subject: ABI: sysfs-bus-platform: add modalias description
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=654e4d5d3d5b778a6d33fcab4028a3c89714c04e;p=linux.git

ABI: sysfs-bus-platform: add modalias description

Define the modalias parameter for platform devices, including
the ones exposed via devicetree.

Acked-by: Barry Song <song.bao.hua@hisilicon.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/9cdebbad008886b1d09f5f3ac5d88bee19f08d97.1632750608.git.mchehab+huawei@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/Documentation/ABI/testing/sysfs-bus-platform b/Documentation/ABI/testing/sysfs-bus-platform
index ff30728595ef1..c4dfe7355c2d7 100644
--- a/Documentation/ABI/testing/sysfs-bus-platform
+++ b/Documentation/ABI/testing/sysfs-bus-platform
@@ -42,3 +42,15 @@ Date:		August 2021
 Contact:	Barry Song <song.bao.hua@hisilicon.com>
 Description:
 		This attribute will show "msi" if <N> is a valid msi irq
+
+What:		/sys/bus/platform/devices/.../modalias
+Description:
+		Same as MODALIAS in the uevent at device creation.
+
+		A platform device that it is exposed via devicetree uses:
+
+			- of:N`of node name`T`type`
+
+		Other platform devices use, instead:
+
+			- platform:`driver name`