Kernel-4.18.0-80.el8_i2c-mtk

• MediaTek’s I2C controller

The MediaTek’s I2C controller is used to interface with I2C devices.

Required properties:

• compatible: value should be either of the following.
  “mediatek,mt2701-i2c”, “mediatek,mt6577-i2c”: for MediaTek MT2701
  “mediatek,mt2712-i2c”: for MediaTek MT2712
  “mediatek,mt6577-i2c”: for MediaTek MT6577
  “mediatek,mt6589-i2c”: for MediaTek MT6589
  “mediatek,mt7622-i2c”: for MediaTek MT7622
  “mediatek,mt7623-i2c”, “mediatek,mt6577-i2c”: for MediaTek MT7623
  “mediatek,mt8173-i2c”: for MediaTek MT8173
• reg: physical base address of the controller and dma base, length of memory
  mapped region.
• interrupts: interrupt number to the cpu.
• clock-div: the fixed value for frequency divider of clock source in i2c
  module. Each IC may be different.
• clocks: clock name from clock manager
• clock-names: Must include “main” and “dma”, if enable have-pmic need include
  “pmic” extra.

Optional properties:

• clock-frequency: Frequency in Hz of the bus when transfer, the default value
  is 100000.
• mediatek,have-pmic: platform can control i2c form special pmic side.
  Only mt6589 and mt8135 support this feature.
• mediatek,use-push-pull: IO config use push-pull mode.

Example:

i2c0: i2c@1100d000 {
        compatible = "mediatek,mt6577-i2c";
        reg = <0x1100d000 0x70>,
              <0x11000300 0x80>;
        interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_LOW>;
        clock-frequency = <400000>;
        mediatek,have-pmic;
        clock-div = <16>;
        clocks = <&i2c0_ck>, <&ap_dma_ck>;
        clock-names = "main", "dma";
};