Documentation/devicetree/bindings/i2c/i2c-mt65xx.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,mt6797-i2c", "mediatek,mt6577-i2c": for MediaTek MT6797
  12       "mediatek,mt7622-i2c": for MediaTek MT7622
  13       "mediatek,mt7623-i2c", "mediatek,mt6577-i2c": for MediaTek MT7623
  14       "mediatek,mt7629-i2c", "mediatek,mt2712-i2c": for MediaTek MT7629
  15       "mediatek,mt8173-i2c": for MediaTek MT8173
  16       "mediatek,mt8183-i2c": for MediaTek MT8183
  17       "mediatek,mt8192-i2c": for MediaTek MT8192
  18       "mediatek,mt8195-i2c", "mediatek,mt8192-i2c": for MediaTek MT8195
  19       "mediatek,mt8516-i2c", "mediatek,mt2712-i2c": for MediaTek MT8516
  20   - reg: physical base address of the controller and dma base, length of memory
  21     mapped region.
  22   - interrupts: interrupt number to the cpu.
  23   - clock-div: the fixed value for frequency divider of clock source in i2c
  24     module. Each IC may be different.
  25   - clocks: clock name from clock manager
  26   - clock-names: Must include "main" and "dma", "arb" is for multi-master that
  27     one bus has more than two i2c controllers, if enable have-pmic need include
  28     "pmic" extra.
  29
  30 Optional properties:
  31   - clock-frequency: Frequency in Hz of the bus when transfer, the default value
  32     is 100000.
  33   - mediatek,have-pmic: platform can control i2c form special pmic side.
  34     Only mt6589 and mt8135 support this feature.
  35   - mediatek,use-push-pull: IO config use push-pull mode.
  36   - vbus-supply: phandle to the regulator that provides power to SCL/SDA.
  37
  38 Example:
  39
  40         i2c0: i2c@1100d000 {
  41                         compatible = "mediatek,mt6577-i2c";
  42                         reg = <0x1100d000 0x70>,
  43                               <0x11000300 0x80>;
  44                         interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_LOW>;
  45                         clock-frequency = <400000>;
  46                         mediatek,have-pmic;
  47                         clock-div = <16>;
  48                         clocks = <&i2c0_ck>, <&ap_dma_ck>;
  49                         clock-names = "main", "dma";
  50         };
  51