24.03.2021 01:48, Rob Herring пишет:
> On Sun, Mar 14, 2021 at 07:48:07PM +0300, Dmitry Osipenko wrote:
>> All NVIDIA Tegra SoCs have a core power domain where majority of hardware
>> blocks reside. Add binding for the core power domain.
>>
>> Signed-off-by: Dmitry Osipenko <dig...@gmail.com>
>> ---
>> .../power/nvidia,tegra20-core-domain.yaml | 51 +++++++++++++++++++
>> 1 file changed, 51 insertions(+)
>> create mode 100644
>> Documentation/devicetree/bindings/power/nvidia,tegra20-core-domain.yaml
>>
>> diff --git
>> a/Documentation/devicetree/bindings/power/nvidia,tegra20-core-domain.yaml
>> b/Documentation/devicetree/bindings/power/nvidia,tegra20-core-domain.yaml
>> new file mode 100644
>> index 000000000000..4692489d780a
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/power/nvidia,tegra20-core-domain.yaml
>> @@ -0,0 +1,51 @@
>> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/power/nvidia,tegra20-core-domain.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: NVIDIA Tegra Core Power Domain
>> +
>> +maintainers:
>> + - Dmitry Osipenko <dig...@gmail.com>
>> + - Jon Hunter <jonath...@nvidia.com>
>> + - Thierry Reding <thierry.red...@gmail.com>
>> +
>> +allOf:
>> + - $ref: power-domain.yaml#
>> +
>> +properties:
>> + compatible:
>> + enum:
>> + - nvidia,tegra20-core-domain
>> + - nvidia,tegra30-core-domain
>> +
>> + operating-points-v2:
>> + description:
>> + Should contain level, voltages and opp-supported-hw property.
>> + The supported-hw is a bitfield indicating SoC speedo or process
>> + ID mask.
>> +
>> + "#power-domain-cells":
>> + const: 0
>> +
>> + power-supply:
>> + description:
>> + Phandle to voltage regulator connected to the SoC Core power rail.
>> +
>> +required:
>> + - compatible
>> + - operating-points-v2
>> + - "#power-domain-cells"
>> + - power-supply
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> + - |
>> + power-domain {
>> + compatible = "nvidia,tegra20-core-domain";
>> + operating-points-v2 = <&opp_table>;
>> + power-supply = <®ulator>;
>> + #power-domain-cells = <0>;
>
> AFAICT, there's no way to access this 'hardware'?
correct