projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| ce38815d XC |
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 | (a) "mediatek,mt6577-i2c", for i2c compatible with mt6577 i2c. | |
| 8 | (b) "mediatek,mt6589-i2c", for i2c compatible with mt6589 i2c. | |
| 9 | (c) "mediatek,mt8127-i2c", for i2c compatible with mt8127 i2c. | |
| 10 | (d) "mediatek,mt8135-i2c", for i2c compatible with mt8135 i2c. | |
| 11 | (e) "mediatek,mt8173-i2c", for i2c compatible with mt8173 i2c. | |
| 12 | - reg: physical base address of the controller and dma base, length of memory | |
| 13 | mapped region. | |
| 14 | - interrupts: interrupt number to the cpu. | |
| 15 | - clock-div: the fixed value for frequency divider of clock source in i2c | |
| 16 | module. Each IC may be different. | |
| 17 | - clocks: clock name from clock manager | |
| 18 | - clock-names: Must include "main" and "dma", if enable have-pmic need include | |
| 19 | "pmic" extra. | |
| 20 | ||
| 21 | Optional properties: | |
| 22 | - clock-frequency: Frequency in Hz of the bus when transfer, the default value | |
| 23 | is 100000. | |
| 24 | - mediatek,have-pmic: platform can control i2c form special pmic side. | |
| 25 | Only mt6589 and mt8135 support this feature. | |
| 26 | - mediatek,use-push-pull: IO config use push-pull mode. | |
| 27 | ||
| 28 | Example: | |
| 29 | ||
| 30 | i2c0: i2c@1100d000 { | |
| 31 | compatible = "mediatek,mt6577-i2c"; | |
| 32 | reg = <0x1100d000 0x70>, | |
| 33 | <0x11000300 0x80>; | |
| 34 | interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_LOW>; | |
| 35 | clock-frequency = <400000>; | |
| 36 | mediatek,have-pmic; | |
| 37 | clock-div = <16>; | |
| 38 | clocks = <&i2c0_ck>, <&ap_dma_ck>; | |
| 39 | clock-names = "main", "dma"; | |
| 40 | }; | |
| 41 |