Commit d0672fa4 authored by Dipen Patel's avatar Dipen Patel
Browse files

dt-bindings: timestamp: Add Tegra234 support 



Added timestamp provider support for the Tegra234 in devicetree
bindings. From Tegra234 SoC onwards, the nvidia,gpio-controller
property is required. This is needed as the tegra always-on (AON) GPIO
HTE/GTE provider depends on the AON GPIO controller where it needs to
do namespace conversion between GPIO line number (belonging to AON
GPIO controller instance) and the GTE slice bits.

Signed-off-by: default avatarDipen Patel <dipenp@nvidia.com>
Reviewed-by: default avatarKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
parent fdd1e348

Documentation/devicetree/bindings/timestamp/nvidia,tegra194-hte.yaml

+56 −4
Original line number Diff line number Diff line
@@ -4,7 +4,7 @@ 
$id: http://devicetree.org/schemas/timestamp/nvidia,tegra194-hte.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#



title: Tegra194 on chip generic hardware timestamping engine (HTE)

title: Tegra on chip generic hardware timestamping engine (HTE) provider



maintainers:

  - Dipen Patel <dipenp@nvidia.com>
@@ -23,6 +23,8 @@ properties: 
    enum:

      - nvidia,tegra194-gte-aon

      - nvidia,tegra194-gte-lic

      - nvidia,tegra234-gte-aon

      - nvidia,tegra234-gte-lic



  reg:

    maxItems: 1
@@ -43,9 +45,14 @@ properties: 
    description:

      HTE lines are arranged in 32 bit slice where each bit represents different

      line/signal that it can enable/configure for the timestamp. It is u32

      property and depends on the HTE instance in the chip. The value 3 is for

      GPIO GTE and 11 for IRQ GTE.

    enum: [3, 11]

      property and the value depends on the HTE instance in the chip.

    enum: [3, 11, 17]



  nvidia,gpio-controller:

    $ref: /schemas/types.yaml#/definitions/phandle

    description:

      The phandle to AON gpio controller instance. This is required to handle

      namespace conversion between GPIO and GTE.



  '#timestamp-cells':

    description:
@@ -62,6 +69,51 @@ required: 
  - nvidia,slices

  - "#timestamp-cells"



allOf:

  - if:

      properties:

        compatible:

          contains:

            enum:

              - nvidia,tegra194-gte-aon

              - nvidia,tegra234-gte-aon

    then:

      properties:

        nvidia,slices:

          const: 3



  - if:

      properties:

        compatible:

          contains:

            enum:

              - nvidia,tegra194-gte-lic

    then:

      properties:

        nvidia,slices:

          const: 11



  - if:

      properties:

        compatible:

          contains:

            enum:

              - nvidia,tegra234-gte-lic

    then:

      properties:

        nvidia,slices:

          const: 17



  - if:

      properties:

        compatible:

          contains:

            enum:

              - nvidia,tegra234-gte-aon

    then:

      required:

        - nvidia,gpio-controller



additionalProperties: false



examples: