| Allwinner Reduced Serial Bus (RSB) controller |
| |
| The RSB controller found on later Allwinner SoCs is an SMBus like 2 wire |
| serial bus with 1 master and up to 15 slaves. It is represented by a node |
| for the controller itself, and child nodes representing the slave devices. |
| |
| Required properties : |
| |
| - reg : Offset and length of the register set for the controller. |
| - compatible : Shall be "allwinner,sun8i-a23-rsb". |
| - interrupts : The interrupt line associated to the RSB controller. |
| - clocks : The gate clk associated to the RSB controller. |
| - resets : The reset line associated to the RSB controller. |
| - #address-cells : shall be 1 |
| - #size-cells : shall be 0 |
| |
| Optional properties : |
| |
| - clock-frequency : Desired RSB bus clock frequency in Hz. Maximum is 20MHz. |
| If not set this defaults to 3MHz. |
| |
| Child nodes: |
| |
| An RSB controller node can contain zero or more child nodes representing |
| slave devices on the bus. Child 'reg' properties should contain the slave |
| device's hardware address. The hardware address is hardwired in the device, |
| which can normally be found in the datasheet. |
| |
| Example: |
| |
| rsb@01f03400 { |
| compatible = "allwinner,sun8i-a23-rsb"; |
| reg = <0x01f03400 0x400>; |
| interrupts = <0 39 4>; |
| clocks = <&apb0_gates 3>; |
| clock-frequency = <3000000>; |
| resets = <&apb0_rst 3>; |
| #address-cells = <1>; |
| #size-cells = <0>; |
| |
| pmic@3e3 { |
| compatible = "..."; |
| reg = <0x3e3>; |
| |
| /* ... */ |
| }; |
| }; |
