linux-kernel - [PATCH 2/2] extcon: arizona: Update device tree binding for mic detect configurations

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Date:	Thu, 10 Dec 2015 17:08:19 +0000
From:	Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
To:	<cw00.choi@...sung.com>
CC:	<myungjoo.ham@...sung.com>, <devicetree@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>,
	<patches@...nsource.wolfsonmicro.com>
Subject: [PATCH 2/2] extcon: arizona: Update device tree binding for mic detect configurations

Update the device tree binding documentation to include documentation for
the wlf,micd-configs property that is used to specify the configurations
for headset polarity detection (CTIA / OTMP).

Signed-off-by: Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
---
 Documentation/devicetree/bindings/extcon/extcon-arizona.txt | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/extcon/extcon-arizona.txt b/Documentation/devicetree/bindings/extcon/extcon-arizona.txt
index 238e10e..fd9b898 100644
--- a/Documentation/devicetree/bindings/extcon/extcon-arizona.txt
+++ b/Documentation/devicetree/bindings/extcon/extcon-arizona.txt
@@ -37,5 +37,13 @@ Optional properties:
     milliseconds.
   - wlf,micd-force-micbias : Force MICBIAS continuously on during microphone
     detection.
+  - wlf,micd-configs : Headset polarity configurations (generally used for
+    detection of CTIA / OMTP headsets), the field can be of variable length
+    but should always be a multiple of 3 cells long, each three cell group
+    represents one polarity configuration.
+    The first cell defines the accessory detection pin, zero will use MICDET1
+    and all other values will use MICDET2.
+    The second cell represents the MICBIAS to be used.
+    The third cell represents the value of the micd-pol-gpio pin.
 
   - wlf,gpsw : Settings for the general purpose switch
-- 
2.1.4

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