Commit 6a22a5db authored by Heiner Kallweit's avatar Heiner Kallweit Committed by Alexandre Belloni
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dt-bindings: rtc: Convert Amlogic Meson vrtc controller binding 



Convert Amlogic Meson vrtc controller binding to yaml.

Signed-off-by: default avatarHeiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/d820d54b-d082-589a-621f-2795d885696a@gmail.com


Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@bootlin.com>
parent e5c59423

Documentation/devicetree/bindings/rtc/amlogic,meson-vrtc.yaml

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/rtc/amlogic,meson-vrtc.yaml#

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



title: Amlogic Virtual RTC (VRTC)



maintainers:

  - Neil Armstrong <neil.armstrong@linaro.org>



description: |

  This is a Linux interface to an RTC managed by firmware, hence it's

  virtual from a Linux perspective.  The interface is 1 register where

  an alarm time (in seconds) is to be written.

  The alarm register is a simple scratch register shared between the

  application processors (AP) and the secure co-processor (SCP.)  When

  the AP suspends, the SCP will use the value of this register to

  program an always-on timer before going sleep. When the timer expires,

  the SCP will wake up and will then wake the AP.



allOf:

  - $ref: rtc.yaml#



properties:

  compatible:

    enum:

      - amlogic,meson-vrtc



  reg:

    maxItems: 1



required:

  - compatible

  - reg



additionalProperties: false



examples:

  - |

    rtc@a8 {

      compatible = "amlogic,meson-vrtc";

      reg = <0x000a8 0x4>;

    };

Documentation/devicetree/bindings/rtc/rtc-meson-vrtc.txt

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* Amlogic Virtual RTC (VRTC)



This is a Linux interface to an RTC managed by firmware, hence it's

virtual from a Linux perspective.  The interface is 1 register where

an alarm time (in seconds) is to be written.



Required properties:

- compatible: should be "amlogic,meson-vrtc"

- reg: physical address for the alarm register



The alarm register is a simple scratch register shared between the

application processors (AP) and the secure co-processor (SCP.)  When

the AP suspends, the SCP will use the value of this register to

program an always-on timer before going sleep. When the timer expires,

the SCP will wake up and will then wake the AP.



Example:



	vrtc: rtc@0a8 {

		compatible = "amlogic,meson-vrtc";

		reg = <0x0 0x000a8 0x0 0x4>;

	};