target/linux/mediatek/patches/0029-dt-bindings-Add-I2C-bindings-for-mt65xx-mt81xx.patch

   1 From d1447a6815913823ef5e75d70efc6f08f288ee40 Mon Sep 17 00:00:00 2001
   2 From: Xudong Chen <xudong.chen@mediatek.com>
   3 Date: Wed, 6 May 2015 16:37:05 +0800
   4 Subject: [PATCH 29/76] dt-bindings: Add I2C bindings for mt65xx/mt81xx.
   5
   6 Add devicetree bindings for Mediatek Soc I2C driver.
   7
   8 Signed-off-by: Xudong Chen <xudong.chen@mediatek.com>
   9 Signed-off-by: Eddie Huang <eddie.huang@mediatek.com>
  10 ---
  11  .../devicetree/bindings/i2c/i2c-mt6577.txt         |   41 ++++++++++++++++++++
  12  1 file changed, 41 insertions(+)
  13  create mode 100644 Documentation/devicetree/bindings/i2c/i2c-mt6577.txt
  14
  15 --- /dev/null
  16 +++ b/Documentation/devicetree/bindings/i2c/i2c-mt6577.txt
  17 @@ -0,0 +1,41 @@
  18 +* Mediatek's I2C controller
  19 +
  20 +The Mediatek's I2C controller is used to interface with I2C devices.
  21 +
  22 +Required properties:
  23 +  - compatible: value should be either of the following.
  24 +      (a) "mediatek,mt6577-i2c", for i2c compatible with mt6577 i2c.
  25 +      (b) "mediatek,mt6589-i2c", for i2c compatible with mt6589 i2c.
  26 +      (c) "mediatek,mt8127-i2c", for i2c compatible with mt8127 i2c.
  27 +      (d) "mediatek,mt8135-i2c", for i2c compatible with mt8135 i2c.
  28 +      (e) "mediatek,mt8173-i2c", for i2c compatible with mt8173 i2c.
  29 +  - reg: physical base address of the controller and dma base, length of memory
  30 +    mapped region.
  31 +  - interrupts: interrupt number to the cpu.
  32 +  - clock-div: the fixed value for frequency divider of clock source in i2c
  33 +    module. Each IC may be different.
  34 +  - clocks: clock name from clock manager
  35 +  - clock-names: Must include "main" and "dma", if enable have-pmic need include
  36 +    "pmic" extra.
  37 +
  38 +Optional properties:
  39 +  - clock-frequency: Frequency in Hz of the bus when transfer, the default value
  40 +    is 100000.
  41 +  - mediatek,have-pmic: platform can control i2c form special pmic side.
  42 +    Only mt6589 and mt8135 support this feature.
  43 +  - mediatek,use-push-pull: IO config use push-pull mode.
  44 +
  45 +Example:
  46 +
  47 +       i2c0: i2c@1100d000 {
  48 +                       compatible = "mediatek,mt6577-i2c";
  49 +                       reg = <0x1100d000 0x70>,
  50 +                             <0x11000300 0x80>;
  51 +                       interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_LOW>;
  52 +                       clock-frequency = <400000>;
  53 +                       mediatek,have-pmic;
  54 +                       clock-div = <16>;
  55 +                       clocks = <&i2c0_ck>, <&ap_dma_ck>;
  56 +                       clock-names = "main", "dma";
  57 +       };
  58 +