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,mt2712-i2c": for MediaTek MT2712
   9       "mediatek,mt6577-i2c": for MediaTek MT6577
  10       "mediatek,mt6589-i2c": for MediaTek MT6589
  11       "mediatek,mt7622-i2c": for MediaTek MT7622
  12       "mediatek,mt7623-i2c", "mediatek,mt6577-i2c": for MediaTek MT7623
  13       "mediatek,mt8173-i2c": for MediaTek MT8173
  14   - reg: physical base address of the controller and dma base, length of memory
  15     mapped region.
  16   - interrupts: interrupt number to the cpu.
  17   - clock-div: the fixed value for frequency divider of clock source in i2c
  18     module. Each IC may be different.
  19   - clocks: clock name from clock manager
  20   - clock-names: Must include "main" and "dma", if enable have-pmic need include
  21     "pmic" extra.
  22
  23 Optional properties:
  24   - clock-frequency: Frequency in Hz of the bus when transfer, the default value
  25     is 100000.
  26   - mediatek,have-pmic: platform can control i2c form special pmic side.
  27     Only mt6589 and mt8135 support this feature.
  28   - mediatek,use-push-pull: IO config use push-pull mode.
  29
  30 Example:
  31
  32         i2c0: i2c@1100d000 {
  33                         compatible = "mediatek,mt6577-i2c";
  34                         reg = <0x1100d000 0x70>,
  35                               <0x11000300 0x80>;
  36                         interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_LOW>;
  37                         clock-frequency = <400000>;
  38                         mediatek,have-pmic;
  39                         clock-div = <16>;
  40                         clocks = <&i2c0_ck>, <&ap_dma_ck>;
  41                         clock-names = "main", "dma";
  42         };
  43