linux-kernel - [PATCH 3/3] leds: trigger: Add documentation for ledtrig-bpf

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Date: Fri, 22 Mar 2024 10:08:16 -0400
From: Daniel Hodges <hodges.daniel.scott@...il.com>
To: ast@...nel.org,
	pavel@....cz,
	lee@...nel.org,
	linux-leds@...r.kernel.org,
	daniel@...earbox.net,
	bpf@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Daniel Hodges <hodges.daniel.scott@...il.com>
Subject: [PATCH 3/3] leds: trigger: Add documentation for ledtrig-bpf

Update the documentation for led triggers to include the BPF LED
trigger.

Signed-off-by: Daniel Hodges <hodges.daniel.scott@...il.com>
---
 Documentation/leds/index.rst       |  1 +
 Documentation/leds/ledtrig-bpf.rst | 13 +++++++++++++
 2 files changed, 14 insertions(+)
 create mode 100644 Documentation/leds/ledtrig-bpf.rst

diff --git a/Documentation/leds/index.rst b/Documentation/leds/index.rst
index 3ade16c18328..2af52a19d6bb 100644
--- a/Documentation/leds/index.rst
+++ b/Documentation/leds/index.rst
@@ -10,6 +10,7 @@ LEDs
    leds-class
    leds-class-flash
    leds-class-multicolor
+   ledtrig-bpf
    ledtrig-oneshot
    ledtrig-transient
    ledtrig-usbport
diff --git a/Documentation/leds/ledtrig-bpf.rst b/Documentation/leds/ledtrig-bpf.rst
new file mode 100644
index 000000000000..391a305f69d1
--- /dev/null
+++ b/Documentation/leds/ledtrig-bpf.rst
@@ -0,0 +1,13 @@
+====================
+BPF LED Trigger
+====================
+
+This LED trigger is useful for triggering LEDs from the BPF subsystem.  This
+trigger is designed to be used in combination with a BPF program that interacts
+with the trigger via a kfunc.  The exported kfuncs will have BTF names that
+start with "bpf_ledtrig_".
+
+The trigger can be activated from user space on led class devices as shown
+below::
+
+  echo bpf > trigger
-- 
2.43.0