target/linux/mediatek/patches-4.9/0085-pmic-led0.patch

   1 From patchwork Mon Mar 20 06:47:24 2017
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   5 Subject: [v6,1/4] dt-bindings: leds: Add document bindings for leds-mt6323
   6 From: sean.wang@mediatek.com
   7 X-Patchwork-Id: 9633073
   8 Message-Id: <1489992447-13007-2-git-send-email-sean.wang@mediatek.com>
   9 To: <rpurdie@rpsys.net>, <jacek.anaszewski@gmail.com>, <lee.jones@linaro.org>,
  10  <matthias.bgg@gmail.com>, <pavel@ucw.cz>, <robh+dt@kernel.org>,
  11  <mark.rutland@arm.com>
  12 Cc: devicetree@vger.kernel.org, keyhaede@gmail.com,
  13  Sean Wang <sean.wang@mediatek.com>, linux-kernel@vger.kernel.org,
  14  linux-mediatek@lists.infradead.org, linux-leds@vger.kernel.org,
  15  linux-arm-kernel@lists.infradead.org
  16 Date: Mon, 20 Mar 2017 14:47:24 +0800
  17
  18 From: Sean Wang <sean.wang@mediatek.com>
  19
  20 This patch adds documentation for devicetree bindings for LED support on
  21 MT6323 PMIC.
  22
  23 Signed-off-by: Sean Wang <sean.wang@mediatek.com>
  24 ---
  25  .../devicetree/bindings/leds/leds-mt6323.txt       | 60 ++++++++++++++++++++++
  26  1 file changed, 60 insertions(+)
  27  create mode 100644 Documentation/devicetree/bindings/leds/leds-mt6323.txt
  28
  29 diff --git a/Documentation/devicetree/bindings/leds/leds-mt6323.txt b/Documentation/devicetree/bindings/leds/leds-mt6323.txt
  30 new file mode 100644
  31 index 0000000..ac38472
  32 --- /dev/null
  33 +++ b/Documentation/devicetree/bindings/leds/leds-mt6323.txt
  34 @@ -0,0 +1,60 @@
  35 +Device Tree Bindings for LED support on MT6323 PMIC
  36 +
  37 +MT6323 LED controller is subfunction provided by MT6323 PMIC, so the LED
  38 +controllers are defined as the subnode of the function node provided by MT6323
  39 +PMIC controller that is being defined as one kind of Muti-Function Device (MFD)
  40 +using shared bus called PMIC wrapper for each subfunction to access remote
  41 +MT6323 PMIC hardware.
  42 +
  43 +For MT6323 MFD bindings see:
  44 +Documentation/devicetree/bindings/mfd/mt6397.txt
  45 +For MediaTek PMIC wrapper bindings see:
  46 +Documentation/devicetree/bindings/soc/mediatek/pwrap.txt
  47 +
  48 +Required properties:
  49 +- compatible : Must be "mediatek,mt6323-led"
  50 +- address-cells : Must be 1
  51 +- size-cells : Must be 0
  52 +
  53 +Each led is represented as a child node of the mediatek,mt6323-led that
  54 +describes the initial behavior for each LED physically and currently only four
  55 +LED child nodes can be supported.
  56 +
  57 +Required properties for the LED child node:
  58 +- reg : LED channel number (0..3)
  59 +
  60 +Optional properties for the LED child node:
  61 +- label : See Documentation/devicetree/bindings/leds/common.txt
  62 +- linux,default-trigger : See Documentation/devicetree/bindings/leds/common.txt
  63 +- default-state: See Documentation/devicetree/bindings/leds/common.txt
  64 +
  65 +Example:
  66 +
  67 +       mt6323: pmic {
  68 +               compatible = "mediatek,mt6323";
  69 +
  70 +               ...
  71 +
  72 +               mt6323led: leds {
  73 +                       compatible = "mediatek,mt6323-led";
  74 +                       #address-cells = <1>;
  75 +                       #size-cells = <0>;
  76 +
  77 +                       led@0 {
  78 +                               reg = <0>;
  79 +                               label = "LED0";
  80 +                               linux,default-trigger = "timer";
  81 +                               default-state = "on";
  82 +                       };
  83 +                       led@1 {
  84 +                               reg = <1>;
  85 +                               label = "LED1";
  86 +                               default-state = "off";
  87 +                       };
  88 +                       led@2 {
  89 +                               reg = <2>;
  90 +                               label = "LED2";
  91 +                               default-state = "on";
  92 +                       };
  93 +               };
  94 +       };