[PATCH] leds: add new functions for mobile routers

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2G/2G/4G routers have some special leds functions:
  - signal strength, which shows info about signal status.
    Some devices have multicolor indication (e.g. D-Link DWR-960)
    other use multiple leds for different levels (e.g. Cell-C RTL30VW)
  - connection status, which shows if connection is active. Some devices
    have multiple leds for different bands (e.g. D-Link DWR-960).
  - sms indicator

This patch adds new LED_FUNCTION_* defines of them.

Signed-off-by: Pawel Dembicki <paweldembicki@xxxxxxxxx>
---
 Documentation/leds/well-known-leds.txt | 9 +++++++++
 include/dt-bindings/leds/common.h      | 5 +++++
 2 files changed, 14 insertions(+)

diff --git a/Documentation/leds/well-known-leds.txt b/Documentation/leds/well-known-leds.txt
index 2160382c86be..677cf7e57a76 100644
--- a/Documentation/leds/well-known-leds.txt
+++ b/Documentation/leds/well-known-leds.txt
@@ -16,6 +16,15 @@ but then try the legacy ones, too.
 
 Notice there's a list of functions in include/dt-bindings/leds/common.h .
 
+* 4G/3G/2G routers
+
+Cellular routers use LEDs for signal strength identification and connection
+status. Some models also have incoming SMS indicator.
+
+Good: "*:connection"
+Good: "*:signal"
+Good: "*:sms"
+
 * Gamepads and joysticks
 
 Game controllers may feature LEDs to indicate a player number. This is commonly
diff --git a/include/dt-bindings/leds/common.h b/include/dt-bindings/leds/common.h
index 3be89a7c20a9..3adfa120353e 100644
--- a/include/dt-bindings/leds/common.h
+++ b/include/dt-bindings/leds/common.h
@@ -60,6 +60,11 @@
 #define LED_FUNCTION_MICMUTE "micmute"
 #define LED_FUNCTION_MUTE "mute"
 
+/* Used for 4G/3G/2G routers. */
+#define LED_FUNCTION_CONNECTION "connection"
+#define LED_FUNCTION_SIGNAL "signal"
+#define LED_FUNCTION_SMS "sms"
+
 /* Used for player LEDs as found on game controllers from e.g. Nintendo, Sony. */
 #define LED_FUNCTION_PLAYER1 "player-1"
 #define LED_FUNCTION_PLAYER2 "player-2"
-- 
2.25.1




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