diff options
| author | Clark Wang <xiaoning.wang@nxp.com> | 2019-02-18 16:55:09 +0800 |
|---|---|---|
| committer | Clark Wang <xiaoning.wang@nxp.com> | 2019-02-21 18:38:12 +0800 |
| commit | 9feeac93a7d91ce67537a8a6c67e624eb7986a01 (patch) | |
| tree | 56b978a81ca44195d47a22e8c69edd0c0338e524 /Documentation | |
| parent | 2f84f4701ced8fad33a0a9947ec5a7bb5a9c2c1f (diff) | |
MLK-20940-1 i2c: busses: Add virtual i2c driver based on rpmsg
Add virtual i2c driver to send SRTM i2c messages to M4.
Each virtual I2C bus has a specal bus id, which is abstracted by M4.
Each SRTM message include a bus id for the bus which the device is on.
Virtual i2c rpmsg bus will bind rpbus nodes with compatible string
"fsl,i2c-rpbus". And "rpmsg-i2c-channel" will probe only one rpmsg
channel for all rpbuses.
This virtual i2c driver depends on CONFIG_I2C and CONFIG_RPMSG.
Signed-off-by: Clark Wang <xiaoning.wang@nxp.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/i2c/i2c-rpmsg-imx.txt | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/i2c/i2c-rpmsg-imx.txt b/Documentation/devicetree/bindings/i2c/i2c-rpmsg-imx.txt new file mode 100644 index 000000000000..fce660d0f179 --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/i2c-rpmsg-imx.txt @@ -0,0 +1,29 @@ +* Freescale Virtual I2C RPMSG bus driver for i.MX + +Required properties: +- compatible : + - "fsl,i2c-rpbus" for I2C bus over RPMSG compatible on i.MX8QXP/QM soc +The i2c-rpbus node should define its bus id (which is the node communicating +with M4) in alias. + +Examples: + +aliases { + ... + i2c1 = &i2c_rpbus_1; + ... +}; + +&i2c_rpbus_1 { + compatible = "fsl,i2c-rpbus"; + #address-cells = <1>; + #size-cells = <0>; + status = "okay"; + + devs_in_this_i2c_bus__for_example: pca6416@20 { + compatible = "ti,tca6416"; + reg = <0x20>; + gpio-controller; + #gpio-cells = <2>; + }; +}; |