| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame^] | 1 | * Texas Instruments Davinci/Keystone I2C |
| 2 | |
| 3 | This file provides information, what the device node for the |
| 4 | davinci/keystone i2c interface contains. |
| 5 | |
| 6 | Required properties: |
| 7 | - compatible: "ti,davinci-i2c" or "ti,keystone-i2c"; |
| 8 | - reg : Offset and length of the register set for the device |
| 9 | - clocks: I2C functional clock phandle. |
| 10 | For 66AK2G this property should be set per binding, |
| 11 | Documentation/devicetree/bindings/clock/ti,sci-clk.yaml |
| 12 | |
| 13 | SoC-specific Required Properties: |
| 14 | |
| 15 | The following are mandatory properties for Keystone 2 66AK2G SoCs only: |
| 16 | |
| 17 | - power-domains: Should contain a phandle to a PM domain provider node |
| 18 | and an args specifier containing the I2C device id |
| 19 | value. This property is as per the binding, |
| 20 | Documentation/devicetree/bindings/soc/ti/sci-pm-domain.yaml |
| 21 | |
| 22 | Recommended properties : |
| 23 | - interrupts : standard interrupt property. |
| 24 | - clock-frequency : desired I2C bus clock frequency in Hz. |
| 25 | - ti,has-pfunc: boolean; if defined, it indicates that SoC supports PFUNC |
| 26 | registers. PFUNC registers allow to switch I2C pins to function as |
| 27 | GPIOs, so they can be toggled manually. |
| 28 | |
| 29 | Example (enbw_cmc board): |
| 30 | i2c@1c22000 { |
| 31 | compatible = "ti,davinci-i2c"; |
| 32 | reg = <0x22000 0x1000>; |
| 33 | clock-frequency = <100000>; |
| 34 | interrupts = <15>; |
| 35 | interrupt-parent = <&intc>; |
| 36 | #address-cells = <1>; |
| 37 | #size-cells = <0>; |
| 38 | |
| 39 | dtt@48 { |
| 40 | compatible = "national,lm75"; |
| 41 | reg = <0x48>; |
| 42 | }; |
| 43 | }; |