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authorNeilBrown <neilb@suse.de>2013-10-31 19:41:20 -0700
committerBryan Wu <cooloney@gmail.com>2014-01-27 17:28:46 -0800
commit10ead6e59934be76b6ce255d6b842a432b207b7f (patch)
treeaab76e123d6cda1cc9b3a484a3bdbf039e639c2c /Documentation/devicetree/bindings/leds
parent9334129e8e956edfd51da37d5e5278478235c7b2 (diff)
LEDS: tca6507: add device-tree support for GPIO configuration.
The 7 lines driven by the TCA6507 can either drive LEDs or act as output-only GPIOs. To make this distinction in devicetree we use the "compatible" property. If the device attached to a line is "compatible" with "gpio", we treat it like a GPIO. If it is "compatible" with "led" (or if no "compatible" value is set) we treat it like an LED. (cooloney@gmail.com: fix typo in the subject) Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: Bryan Wu <cooloney@gmail.com>
Diffstat (limited to 'Documentation/devicetree/bindings/leds')
-rw-r--r--Documentation/devicetree/bindings/leds/tca6507.txt16
1 files changed, 16 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/leds/tca6507.txt b/Documentation/devicetree/bindings/leds/tca6507.txt
index 80ff3dfb1f32..d7221b84987c 100644
--- a/Documentation/devicetree/bindings/leds/tca6507.txt
+++ b/Documentation/devicetree/bindings/leds/tca6507.txt
@@ -2,6 +2,13 @@ LEDs connected to tca6507
Required properties:
- compatible : should be : "ti,tca6507".
+- #address-cells: must be 1
+- #size-cells: must be 0
+- reg: typically 0x45.
+
+Optional properties:
+- gpio-controller: allows lines to be used as output-only GPIOs.
+- #gpio-cells: if present, must be 0.
Each led is represented as a sub-node of the ti,tca6507 device.
@@ -10,6 +17,7 @@ LED sub-node properties:
- reg : number of LED line (could be from 0 to 6)
- linux,default-trigger : (optional)
see Documentation/devicetree/bindings/leds/common.txt
+- compatible: either "led" (the default) or "gpio".
Examples:
@@ -19,6 +27,9 @@ tca6507@45 {
#size-cells = <0>;
reg = <0x45>;
+ gpio-controller;
+ #gpio-cells = <2>;
+
led0: red-aux@0 {
label = "red:aux";
reg = <0x0>;
@@ -29,5 +40,10 @@ tca6507@45 {
reg = <0x5>;
linux,default-trigger = "default-on";
};
+
+ wifi-reset@6 {
+ reg = <0x6>;
+ compatible = "gpio";
+ };
};

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