Commit 84def5ab authored by Samuel Holland's avatar Samuel Holland Committed by Jernej Skrabec
Browse files

dt-bindings: power: Add Allwinner D1 PPU 



The Allwinner D1 family of SoCs contain a PPU power domain controller
separate from the PRCM. It can power down the video engine and DSP, and
it contains special logic for hardware-assisted CPU idle. Other recent
Allwinner SoCs (e.g. TV303) have a PPU with a different set of domains.

Reviewed-by: default avatarKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: default avatarSamuel Holland <samuel@sholland.org>
Link: https://lore.kernel.org/r/20230126063419.15971-2-samuel@sholland.org


Signed-off-by: default avatarJernej Skrabec <jernej.skrabec@gmail.com>
parent 73b7d7f2

Documentation/devicetree/bindings/power/allwinner,sun20i-d1-ppu.yaml

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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

%YAML 1.2

---

$id: http://devicetree.org/schemas/power/allwinner,sun20i-d1-ppu.yaml#

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



title: Allwinner SoCs PPU power domain controller



maintainers:

  - Samuel Holland <samuel@sholland.org>



description:

  D1 and related SoCs contain a power domain controller for the CPUs, GPU, and

  video-related hardware.



properties:

  compatible:

    enum:

      - allwinner,sun20i-d1-ppu



  reg:

    maxItems: 1



  clocks:

    description: Bus Clock

    maxItems: 1



  resets:

    maxItems: 1



  '#power-domain-cells':

    const: 1



required:

  - compatible

  - reg

  - clocks

  - resets

  - '#power-domain-cells'



additionalProperties: false



examples:

  - |

    #include <dt-bindings/clock/sun20i-d1-r-ccu.h>

    #include <dt-bindings/reset/sun20i-d1-r-ccu.h>



    ppu: power-controller@7001000 {

        compatible = "allwinner,sun20i-d1-ppu";

        reg = <0x7001000 0x1000>;

        clocks = <&r_ccu CLK_BUS_R_PPU>;

        resets = <&r_ccu RST_BUS_R_PPU>;

        #power-domain-cells = <1>;

    };

include/dt-bindings/power/allwinner,sun20i-d1-ppu.h

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/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */



#ifndef _DT_BINDINGS_POWER_SUN20I_D1_PPU_H_

#define _DT_BINDINGS_POWER_SUN20I_D1_PPU_H_



#define PD_CPU			0

#define PD_VE			1

#define PD_DSP			2



#endif /* _DT_BINDINGS_POWER_SUN20I_D1_PPU_H_ */