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From patchwork Mon Mar 20 06:47:24 2017
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Subject: [v6,1/4] dt-bindings: leds: Add document bindings for leds-mt6323
From: sean.wang@mediatek.com
X-Patchwork-Id: 9633073
Message-Id: <1489992447-13007-2-git-send-email-sean.wang@mediatek.com>
To: <rpurdie@rpsys.net>, <jacek.anaszewski@gmail.com>, <lee.jones@linaro.org>,
<matthias.bgg@gmail.com>, <pavel@ucw.cz>, <robh+dt@kernel.org>,
<mark.rutland@arm.com>
Cc: devicetree@vger.kernel.org, keyhaede@gmail.com,
Sean Wang <sean.wang@mediatek.com>, linux-kernel@vger.kernel.org,
linux-mediatek@lists.infradead.org, linux-leds@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Date: Mon, 20 Mar 2017 14:47:24 +0800
From: Sean Wang <sean.wang@mediatek.com>
This patch adds documentation for devicetree bindings for LED support on
MT6323 PMIC.
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
---
.../devicetree/bindings/leds/leds-mt6323.txt | 60 ++++++++++++++++++++++
1 file changed, 60 insertions(+)
create mode 100644 Documentation/devicetree/bindings/leds/leds-mt6323.txt
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/leds-mt6323.txt
@@ -0,0 +1,60 @@
+Device Tree Bindings for LED support on MT6323 PMIC
+
+MT6323 LED controller is subfunction provided by MT6323 PMIC, so the LED
+controllers are defined as the subnode of the function node provided by MT6323
+PMIC controller that is being defined as one kind of Muti-Function Device (MFD)
+using shared bus called PMIC wrapper for each subfunction to access remote
+MT6323 PMIC hardware.
+
+For MT6323 MFD bindings see:
+Documentation/devicetree/bindings/mfd/mt6397.txt
+For MediaTek PMIC wrapper bindings see:
+Documentation/devicetree/bindings/soc/mediatek/pwrap.txt
+
+Required properties:
+- compatible : Must be "mediatek,mt6323-led"
+- address-cells : Must be 1
+- size-cells : Must be 0
+
+Each led is represented as a child node of the mediatek,mt6323-led that
+describes the initial behavior for each LED physically and currently only four
+LED child nodes can be supported.
+
+Required properties for the LED child node:
+- reg : LED channel number (0..3)
+
+Optional properties for the LED child node:
+- label : See Documentation/devicetree/bindings/leds/common.txt
+- linux,default-trigger : See Documentation/devicetree/bindings/leds/common.txt
+- default-state: See Documentation/devicetree/bindings/leds/common.txt
+
+Example:
+
+ mt6323: pmic {
+ compatible = "mediatek,mt6323";
+
+ ...
+
+ mt6323led: leds {
+ compatible = "mediatek,mt6323-led";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ led@0 {
+ reg = <0>;
+ label = "LED0";
+ linux,default-trigger = "timer";
+ default-state = "on";
+ };
+ led@1 {
+ reg = <1>;
+ label = "LED1";
+ default-state = "off";
+ };
+ led@2 {
+ reg = <2>;
+ label = "LED2";
+ default-state = "on";
+ };
+ };
+ };
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