linux-kernel - [PATCH v3 04/25] dt-bindings: leds: Add function, color and led-enumerator properties

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Date:   Sun, 31 Mar 2019 19:54:40 +0200
From:   Jacek Anaszewski <jacek.anaszewski@...il.com>
To:     linux-leds@...r.kernel.org
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        pavel@....cz, robh@...nel.org, jacek.anaszewski@...il.com,
        Baolin Wang <baolin.wang@...aro.org>,
        Dan Murphy <dmurphy@...com>, Daniel Mack <daniel@...que.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Oleh Kravchenko <oleg@....org.ua>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Simon Shields <simon@...eageos.org>
Subject: [PATCH v3 04/25] dt-bindings: leds: Add function, color and led-enumerator properties

Introduce dedicated properties for conveying information about
LED function and color. Mark old "label" property as deprecated.

Additionally led-enumerator property is being provided for the
cases when neither function nor color can be used for LED
differentiation.

Signed-off-by: Jacek Anaszewski <jacek.anaszewski@...il.com>
Cc: Baolin Wang <baolin.wang@...aro.org>
Cc: Pavel Machek <pavel@....cz>
Cc: Dan Murphy <dmurphy@...com>
Cc: Daniel Mack <daniel@...que.org>
Cc: Linus Walleij <linus.walleij@...aro.org>
Cc: Oleh Kravchenko <oleg@....org.ua>
Cc: Sakari Ailus <sakari.ailus@...ux.intel.com>
Cc: Simon Shields <simon@...eageos.org>
---
 Documentation/devicetree/bindings/leds/common.txt | 61 ++++++++++++++++++++---
 1 file changed, 53 insertions(+), 8 deletions(-)

diff --git a/Documentation/devicetree/bindings/leds/common.txt b/Documentation/devicetree/bindings/leds/common.txt
index 70876ac11367..a63b4c6ac1ff 100644
--- a/Documentation/devicetree/bindings/leds/common.txt
+++ b/Documentation/devicetree/bindings/leds/common.txt
@@ -10,14 +10,29 @@ can influence the way of the LED device initialization, the LED components
 have to be tightly coupled with the LED device binding. They are represented
 by child nodes of the parent LED device binding.
 
+
 Optional properties for child nodes:
 - led-sources : List of device current outputs the LED is connected to. The
 		outputs are identified by the numbers that must be defined
 		in the LED device binding documentation.
+
+- function: LED functon. Use one of the LED_FUNCTION_* prefixed definitions
+	    from the header include/dt-bindings/leds/common.h.
+	    If there is no matching LED_FUNCTION available, add a new one.
+
+- color : Color of the LED. Use one of the LED_COLOR_ID_* prefixed definitions
+	  from the header include/dt-bindings/leds/common.h.
+	  If there is no matching LED_COLOR_ID available, add a new one.
+
+- led-enumerator: Integer to be used for LED differentiation when neither
+		  function nor color can be used for that purpose.
+
 - label : The label for this LED. If omitted, the label is taken from the node
 	  name (excluding the unit address). It has to uniquely identify
 	  a device, i.e. no other LED class device can be assigned the same
-	  label.
+	  label. This property is deprecated - use 'function' and 'color'
+	  properties instead. led-enumerator has no effect when this property
+	  is present.
 
 - default-state : The initial state of the LED. Valid values are "on", "off",
   and "keep". If the LED is already on or off and the default-state property is
@@ -99,29 +114,59 @@ Required properties for trigger source:
 
 * Examples
 
-gpio-leds {
+#include <dt-bindings/leds/common.h>
+
+led-controller@0 {
 	compatible = "gpio-leds";
 
-	system-status {
-		label = "Status";
+	led0 {
+		function = LED_FUNCTION_STATUS;
 		linux,default-trigger = "heartbeat";
 		gpios = <&gpio0 0 GPIO_ACTIVE_HIGH>;
 	};
 
-	usb {
+	led1 {
+		function = LED_FUNCTION_USB;
 		gpios = <&gpio0 1 GPIO_ACTIVE_HIGH>;
 		trigger-sources = <&ohci_port1>, <&ehci_port1>;
 	};
 };
 
-max77693-led {
+led-controller@0 {
 	compatible = "maxim,max77693-led";
 
-	camera-flash {
-		label = "Flash";
+	led {
+		function = LED_FUNCTION_FLASH;
+		color = <LED_COLOR_ID_WHITE>;
 		led-sources = <0>, <1>;
 		led-max-microamp = <50000>;
 		flash-max-microamp = <320000>;
 		flash-max-timeout-us = <500000>;
 	};
 };
+
+led-controller@30 {
+        compatible = "panasonic,an30259a";
+        reg = <0x30>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        led@1 {
+		reg = <1>;
+		linux,default-trigger = "heartbeat";
+		function = LED_FUNCTION_INDICATOR;
+		led-enumerator = <1>;
+        };
+
+        led@2 {
+		reg = <2>;
+		function = LED_FUNCTION_INDICATOR;
+		led-enumerator = <2>;
+        };
+
+        led@3 {
+		reg = <3>;
+		function = LED_FUNCTION_INDICATOR;
+		led-enumerator = <3>;
+        };
+};
-- 
2.11.0