lkml.org 
[lkml]   [2018]   [Oct]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 2/7] dt-bindings: mfd: ds90ux9xx: add description of TI DS90Ux9xx I2C bridge
    Date
    From: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>

    TI DS90Ux9xx de-/serializers are capable to route I2C messages to
    I2C slave devices connected to a remote de-/serializer in a pair,
    the change adds description of device tree bindings of the subcontroller
    to configure and enable this functionality.

    Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
    ---
    .../bindings/mfd/ti,ds90ux9xx-i2c-bridge.txt | 61 +++++++++++++++++++
    1 file changed, 61 insertions(+)
    create mode 100644 Documentation/devicetree/bindings/mfd/ti,ds90ux9xx-i2c-bridge.txt

    diff --git a/Documentation/devicetree/bindings/mfd/ti,ds90ux9xx-i2c-bridge.txt b/Documentation/devicetree/bindings/mfd/ti,ds90ux9xx-i2c-bridge.txt
    new file mode 100644
    index 000000000000..4169e382073a
    --- /dev/null
    +++ b/Documentation/devicetree/bindings/mfd/ti,ds90ux9xx-i2c-bridge.txt
    @@ -0,0 +1,61 @@
    +TI DS90Ux9xx de-/serializer I2C bridge subcontroller
    +
    +Required properties:
    +- compatible: Must contain a generic "ti,ds90ux9xx-i2c-bridge" value and
    + may contain one more specific value from the list:
    + "ti,ds90ux925-i2c-bridge",
    + "ti,ds90ux926-i2c-bridge",
    + "ti,ds90ux927-i2c-bridge",
    + "ti,ds90ux928-i2c-bridge",
    + "ti,ds90ux940-i2c-bridge".
    +
    +Required properties of a de-/serializer device connected to a local I2C bus:
    +- ti,i2c-bridges: List of phandles to remote de-/serializer devices with
    + two arguments: id of a local de-/serializer FPD link and an assigned
    + I2C address of a remote de-/serializer to be accessed on a local
    + I2C bus.
    +
    +Optional properties of a de-/serializer device connected to a local I2C bus:
    +- ti,i2c-bridge-maps: List of 3-cell values:
    + - the first argument is id of a local de-/serializer FPD link,
    + - the second argument is an I2C address of a device connected to
    + a remote de-/serializer IC,
    + - the third argument is an I2C address of the remote I2C device
    + for access on a local I2C bus.
    +- ti,i2c-bridge-auto-ack: Enables AUTO ACK mode.
    +- ti,i2c-bridge-pass-all: Enables PASS ALL mode, remote I2C slave devices
    + are accessible on a local (host) I2C bus without I2C address
    + remappings.
    +
    +Remote de-/serializer device may contain a list of device nodes, each
    +one represents an I2C device connected to that remote de-/serializer IC.
    +
    +Example (remote device is a deserializer with Atmel MXT touchscreen):
    +
    +serializer: serializer@c {
    + compatible = "ti,ds90ub927q", "ti,ds90ux9xx";
    + reg = <0xc>;
    +
    + i2c-bridge {
    + compatible = "ti,ds90ux927-i2c-bridge",
    + "ti,ds90ux9xx-i2c-bridge";
    + ti,i2c-bridges = <&deserializer 0 0x3b>;
    + ti,i2c-bridge-maps = <0 0x4b 0x64>;
    + };
    +};
    +
    +deserializer: deserializer {
    + compatible = "ti,ds90ub928q", "ti,ds90ux9xx";
    +
    + i2c-bridge {
    + compatible = "ti,ds90ux928-i2c-bridge",
    + "ti,ds90ux9xx-i2c-bridge";
    + #address-cells = <1>;
    + #size-cells = <0>;
    +
    + touchscreen@4b {
    + compatible = "atmel,maxtouch";
    + reg = <0x4b>;
    + };
    + };
    +};
    --
    2.17.1
    \
     
     \ /
      Last update: 2018-10-08 23:13    [W:3.814 / U:0.532 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site