| * 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. |
| (a) "mediatek,mt6577-i2c", for i2c compatible with mt6577 i2c. |
| (b) "mediatek,mt6589-i2c", for i2c compatible with mt6589 i2c. |
| (c) "mediatek,mt8127-i2c", for i2c compatible with mt8127 i2c. |
| (d) "mediatek,mt8135-i2c", for i2c compatible with mt8135 i2c. |
| (e) "mediatek,mt8173-i2c", for i2c compatible with mt8173 i2c. |
| - 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"; |
| }; |
| |
