linux-kernel - Re: [PATCH v3 2/4] dt-bindings: clk: Add Baikal-T1 CCU Dividers binding

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Date:   Fri, 29 May 2020 11:55:23 -0600
From:   Rob Herring <robh@...nel.org>
To:     Serge Semin <Sergey.Semin@...kalelectronics.ru>
Cc:     linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Stephen Boyd <sboyd@...nel.org>, Arnd Bergmann <arnd@...db.de>,
        linux-mips@...r.kernel.org,
        Michael Turquette <mturquette@...libre.com>,
        Rob Herring <robh+dt@...nel.org>,
        Serge Semin <fancer.lancer@...il.com>
Subject: Re: [PATCH v3 2/4] dt-bindings: clk: Add Baikal-T1 CCU Dividers
 binding

On Wed, 27 May 2020 01:20:54 +0300, Serge Semin wrote:
> After being gained by the CCU PLLs the signals must be transformed to
> be suitable for the clock-consumers. This is done by a set of dividers
> embedded into the CCU. A first block of dividers is used to create
> reference clocks for AXI-bus of high-speed peripheral IP-cores of the
> chip. The second block dividers alter the PLLs output signals to be then
> consumed by SoC peripheral devices. Both block DT nodes are ordinary
> clock-providers with standard set of properties supported. But in addition
> to that each clock provider can be used to reset the corresponding clock
> domain. This makes the AXI-bus and System Devices CCU DT nodes to be also
> reset-providers.
> 
> Signed-off-by: Serge Semin <Sergey.Semin@...kalelectronics.ru>
> Cc: Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>
> Cc: Arnd Bergmann <arnd@...db.de>
> Cc: linux-mips@...r.kernel.org
> 
> ---
> 
> Changelog v2:
> - Rearrange the SoBs.
> - Combine AXI-bus and System Devices CCU bindings into a single file.
> - Discard comments in the bindings file header.
> - Add dual GPL/BSD license.
> - Add spaces around the ASCII-graphics in the binding description.
> - Remove reference to Documentation/devicetree/bindings/clock/clock-bindings.txt
>   file.
> - Discard redundant object check against "/schemas/clock/clock.yaml#" schema.
> - Discard redundant descriptions of "#clock-cells" and "#reset-cells"
>   properties.
> - Discard "reg" property since the CCU dividers DT nodes are supposed be
>   children of the syscon-compatible system controller node.
> - Remove "clock-output-names" property support.
> - Replace "additionalProperties: false" with "unevaluatedProperties: false".
> - Lowercase the nodes name in the examples.
> - Use "clock-controller" node name suffix in the examples.
> - Remove unnecessary comments in the clocks and resets dt-binding header
>   files.
> - Discard label definitions in the examples.
> 
> Changelog v3:
> - Get the reg property back even though the driver is using the parental
>   syscon regmap.
> - The DT schema will live separately from the system controller, but the
>   corresponding sub-node of the later DT schema will $ref this one.
> ---
>  .../bindings/clock/baikal,bt1-ccu-div.yaml    | 188 ++++++++++++++++++
>  include/dt-bindings/clock/bt1-ccu.h           |  32 +++
>  include/dt-bindings/reset/bt1-ccu.h           |  25 +++
>  3 files changed, 245 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/clock/baikal,bt1-ccu-div.yaml
>  create mode 100644 include/dt-bindings/reset/bt1-ccu.h
> 

Reviewed-by: Rob Herring <robh@...nel.org>