Documentation/devicetree/bindings/i2c/i2c-mtk.txt

   1 * Mediatek's I2C controller
   2
   3 The Mediatek's I2C controller is used to interface with I2C devices.
   4
   5 Required properties:
   6   - compatible: value should be either of the following.
   7       "mediatek,mt2701-i2c", "mediatek,mt6577-i2c": for Mediatek mt2701
   8       "mediatek,mt6577-i2c": for i2c compatible with mt6577.
   9       "mediatek,mt6589-i2c": for i2c compatible with mt6589.
  10       "mediatek,mt7623-i2c", "mediatek,mt6577-i2c": for i2c compatible with mt7623.
  11       "mediatek,mt8173-i2c": for i2c compatible with mt8173.
  12   - reg: physical base address of the controller and dma base, length of memory
  13     mapped region.
  14   - interrupts: interrupt number to the cpu.
  15   - clock-div: the fixed value for frequency divider of clock source in i2c
  16     module. Each IC may be different.
  17   - clocks: clock name from clock manager
  18   - clock-names: Must include "main" and "dma", if enable have-pmic need include
  19     "pmic" extra.
  20
  21 Optional properties:
  22   - clock-frequency: Frequency in Hz of the bus when transfer, the default value
  23     is 100000.
  24   - mediatek,have-pmic: platform can control i2c form special pmic side.
  25     Only mt6589 and mt8135 support this feature.
  26   - mediatek,use-push-pull: IO config use push-pull mode.
  27
  28 Example:
  29
  30         i2c0: i2c@1100d000 {
  31                         compatible = "mediatek,mt6577-i2c";
  32                         reg = <0x1100d000 0x70>,
  33                               <0x11000300 0x80>;
  34                         interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_LOW>;
  35                         clock-frequency = <400000>;
  36                         mediatek,have-pmic;
  37                         clock-div = <16>;
  38                         clocks = <&i2c0_ck>, <&ap_dma_ck>;
  39                         clock-names = "main", "dma";
  40         };
  41