| 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>; |
| }; |
| }; |
| }; |
