| An i2c gate is useful to e.g. reduce the digital noise for RF tuners connected | |
| to the i2c bus. Gates are similar to arbitrators in that you need to perform | |
| some kind of operation to access the i2c bus past the arbitrator/gate, but | |
| there are no competing masters to consider for gates and therefore there is | |
| no arbitration happening for gates. | |
| Common i2c gate properties. | |
| - i2c-gate child node | |
| Required properties for the i2c-gate child node: | |
| - #address-cells = <1>; | |
| - #size-cells = <0>; | |
| Optional properties for i2c-gate child node: | |
| - Child nodes conforming to i2c bus binding | |
| Example : | |
| /* | |
| An Invensense mpu9150 at address 0x68 featuring an on-chip Asahi | |
| Kasei ak8975 compass behind a gate. | |
| */ | |
| mpu9150@68 { | |
| compatible = "invensense,mpu9150"; | |
| reg = <0x68>; | |
| interrupt-parent = <&gpio1>; | |
| interrupts = <18 1>; | |
| i2c-gate { | |
| #address-cells = <1>; | |
| #size-cells = <0>; | |
| ax8975@c { | |
| compatible = "ak,ak8975"; | |
| reg = <0x0c>; | |
| }; | |
| }; | |
| }; |