linux-kernel - [PATCH v2] dt-bindings: leds: Document commonly used LED triggers

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Message-Id: <20201210082449.30586-1-manivannan.sadhasivam@linaro.org>
Date:   Thu, 10 Dec 2020 13:54:49 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     jacek.anaszewski@...il.com, pavel@....cz, dmurphy@...com,
        robh+dt@...nel.org
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-leds@...r.kernel.org, thunder.leizhen@...wei.com,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Subject: [PATCH v2] dt-bindings: leds: Document commonly used LED triggers

This commit documents the LED triggers used commonly in the SoCs. Not
all triggers are documented as some of them are very application specific.
Most of the triggers documented here are currently used in devicetrees
of many SoCs.

While at it, let's also sort the triggers in ascending order.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
---

Changes in v2:

* Added more triggers, fixed the regex
* Sorted triggers in ascending order

 .../devicetree/bindings/leds/common.yaml      | 78 ++++++++++++++-----
 1 file changed, 60 insertions(+), 18 deletions(-)

diff --git a/Documentation/devicetree/bindings/leds/common.yaml b/Documentation/devicetree/bindings/leds/common.yaml
index f1211e7045f1..3c2e2208c1da 100644
--- a/Documentation/devicetree/bindings/leds/common.yaml
+++ b/Documentation/devicetree/bindings/leds/common.yaml
@@ -79,24 +79,66 @@ properties:
       the LED.
     $ref: /schemas/types.yaml#definitions/string
 
-    enum:
-        # LED will act as a back-light, controlled by the framebuffer system
-      - backlight
-        # LED will turn on (but for leds-gpio see "default-state" property in
-        # Documentation/devicetree/bindings/leds/leds-gpio.yaml)
-      - default-on
-        # LED "double" flashes at a load average based rate
-      - heartbeat
-        # LED indicates disk activity
-      - disk-activity
-        # LED indicates IDE disk activity (deprecated), in new implementations
-        # use "disk-activity"
-      - ide-disk
-        # LED flashes at a fixed, configurable rate
-      - timer
-        # LED alters the brightness for the specified duration with one software
-        # timer (requires "led-pattern" property)
-      - pattern
+    oneOf:
+      - items:
+          - enum:
+                # LED indicates mic mute state
+              - audio-micmute
+                # LED indicates audio mute state
+              - audio-mute
+                # LED will act as a back-light, controlled by the framebuffer system
+              - backlight
+                # LED indicates bluetooth power state
+              - bluetooth-power
+                # LED indicates activity of all CPUs
+              - cpu
+                # LED will turn on (but for leds-gpio see "default-state" property in
+                # Documentation/devicetree/bindings/leds/leds-gpio.yaml)
+              - default-on
+                # LED indicates disk activity
+              - disk-activity
+                # LED indicates disk read activity
+              - disk-read
+                # LED indicates disk write activity
+              - disk-write
+                # LED indicates camera flash state
+              - flash
+                # LED "double" flashes at a load average based rate
+              - heartbeat
+                # LED indicates IDE disk activity (deprecated), in new implementations
+                # use "disk-activity"
+              - ide-disk
+                # LED indicates MTD memory activity
+              - mtd
+                # LED indicates NAND memory activity (deprecated),
+                # in new implementations use "mtd"
+              - nand-disk
+                # No trigger assigned to the LED. This is the default mode
+                # if trigger is absent
+              - none
+                # LED alters the brightness for the specified duration with one software
+                # timer (requires "led-pattern" property)
+              - pattern
+                # LED flashes at a fixed, configurable rate
+              - timer
+                # LED indicates camera torch state
+              - torch
+                # LED indicates USB gadget activity
+              - usb-gadget
+                # LED indicates USB host activity
+              - usb-host
+      - items:
+            # LED indicates activity of [N]th CPU
+          - pattern: "^cpu[0-9]{1,2}$"
+      - items:
+            # LED indicates power status of [N]th Bluetooth HCI device
+          - pattern: "^hci[0-9]{1,2}-power$"
+      - items:
+            # LED indicates [N]th MMC storage activity
+          - pattern: "^mmc[0-9]{1,2}$"
+      - items:
+            # LED indicates [N]th WLAN Tx activity
+          - pattern: "^phy[0-9]{1,2}tx$"
 
   led-pattern:
     description: |
-- 
2.25.1