projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| bb336ba0 BB |
1 | |
| 2 | * Allwinner P2WI (Push/Pull 2 Wire Interface) controller | |
| 3 | ||
| 4 | Required properties : | |
| 5 | ||
| 6 | - reg : Offset and length of the register set for the device. | |
| 7 | - compatible : Should one of the following: | |
| 8 | - "allwinner,sun6i-a31-p2wi" | |
| 9 | - interrupts : The interrupt line connected to the P2WI peripheral. | |
| 10 | - clocks : The gate clk connected to the P2WI peripheral. | |
| 11 | - resets : The reset line connected to the P2WI peripheral. | |
| 12 | ||
| 13 | Optional properties : | |
| 14 | ||
| 15 | - clock-frequency : Desired P2WI bus clock frequency in Hz. If not set the | |
| 16 | default frequency is 100kHz | |
| 17 | ||
| 18 | A P2WI may contain one child node encoding a P2WI slave device. | |
| 19 | ||
| 20 | Slave device properties: | |
| 21 | Required properties: | |
| 22 | - reg : the I2C slave address used during the initialization | |
| 23 | process to switch from I2C to P2WI mode | |
| 24 | ||
| 25 | Example: | |
| 26 | ||
| 27 | p2wi@01f03400 { | |
| 28 | compatible = "allwinner,sun6i-a31-p2wi"; | |
| 29 | reg = <0x01f03400 0x400>; | |
| 30 | interrupts = <0 39 4>; | |
| 31 | clocks = <&apb0_gates 3>; | |
| 32 | clock-frequency = <6000000>; | |
| 33 | resets = <&apb0_rst 3>; | |
| 34 | ||
| 35 | axp221: pmic@68 { | |
| 36 | compatible = "x-powers,axp221"; | |
| 37 | reg = <0x68>; | |
| 38 | ||
| 39 | /* ... */ | |
| 40 | }; | |
| 41 | }; |