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 MediaTek MT6577
   9       "mediatek,mt6589-i2c": for MediaTek MT6589
  10       "mediatek,mt7622-i2c": for MediaTek MT7622
  11       "mediatek,mt7623-i2c", "mediatek,mt6577-i2c": for MediaTek MT7623
  12       "mediatek,mt8173-i2c": for MediaTek MT8173
  13   - reg: physical base address of the controller and dma base, length of memory
  14     mapped region.
  15   - interrupts: interrupt number to the cpu.
  16   - clock-div: the fixed value for frequency divider of clock source in i2c
  17     module. Each IC may be different.
  18   - clocks: clock name from clock manager
  19   - clock-names: Must include "main" and "dma", if enable have-pmic need include
  20     "pmic" extra.
  21
  22 Optional properties:
  23   - clock-frequency: Frequency in Hz of the bus when transfer, the default value
  24     is 100000.
  25   - mediatek,have-pmic: platform can control i2c form special pmic side.
  26     Only mt6589 and mt8135 support this feature.
  27   - mediatek,use-push-pull: IO config use push-pull mode.
  28
  29 Example:
  30
  31         i2c0: i2c@1100d000 {
  32                         compatible = "mediatek,mt6577-i2c";
  33                         reg = <0x1100d000 0x70>,
  34                               <0x11000300 0x80>;
  35                         interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_LOW>;
  36                         clock-frequency = <400000>;
  37                         mediatek,have-pmic;
  38                         clock-div = <16>;
  39                         clocks = <&i2c0_ck>, <&ap_dma_ck>;
  40                         clock-names = "main", "dma";
  41         };
  42