[PATCH 02/10] dt-bindings: clock: Add Amlogic A9 PLL clock controller

[Krzysztof Kozlowski]

On 22/05/2026 08:20, Jian Hu wrote:
> Hi Krzysztof,
> 
> Thanks for your review.
> 
> On 5/15/2026 4:09 PM, Krzysztof Kozlowski wrote:
>> [ EXTERNAL EMAIL ]
>>
>> On Mon, May 11, 2026 at 08:47:24PM +0800, Jian Hu wrote:
>>> Add the PLL clock controller dt-bindings for the Amlogic A9 SoC family.
>>>
>>> Signed-off-by: Jian Hu <jian.hu at amlogic.com>
>>> ---
>>>   .../bindings/clock/amlogic,a9-pll-clkc.yaml        | 110 +++++++++++++++++++++
>>>   include/dt-bindings/clock/amlogic,a9-pll-clkc.h    |  55 +++++++++++
>>>   2 files changed, 165 insertions(+)
>>>
>>> diff --git a/Documentation/devicetree/bindings/clock/amlogic,a9-pll-clkc.yaml b/Documentation/devicetree/bindings/clock/amlogic,a9-pll-clkc.yaml
>>> new file mode 100644
>>> index 000000000000..4ee6013ba1a1
>>> --- /dev/null
>>> +++ b/Documentation/devicetree/bindings/clock/amlogic,a9-pll-clkc.yaml
>>> @@ -0,0 +1,110 @@
>>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>>> +# Copyright (C) 2026 Amlogic, Inc. All rights reserved
>>> +%YAML 1.2
>>> +---
>>> +$id: http://devicetree.org/schemas/clock/amlogic,a9-pll-clkc.yaml#
>>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>>> +
>>> +title: Amlogic A9 Series PLL Clock Controller
>>> +
>>> +maintainers:
>>> +  - Neil Armstrong <neil.armstrong at linaro.org>
>>> +  - Jerome Brunet <jbrunet at baylibre.com>
>>> +  - Jian Hu <jian.hu at amlogic.com>
>>> +  - Xianwei Zhao <xianwei.zhao at amlogic.com>
>>> +
>>> +properties:
>>> +  compatible:
>>> +    enum:
>>> +      - amlogic,a9-gp0-pll
>>> +      - amlogic,a9-hifi0-pll
>>> +      - amlogic,a9-hifi1-pll
>>> +      - amlogic,a9-mclk0-pll
>>> +      - amlogic,a9-mclk1-pll
>>> +
>>> +  reg:
>>> +    maxItems: 1
>>> +
>>> +  '#clock-cells':
>>> +    const: 1
>>> +
>>> +  clocks:
>>> +    items:
>>> +      - description: pll input oscillator gate
>>> +      - description: fixed input clock source for mclk_sel_0
>>> +      - description: u3p2pll input clock source for mclk_sel_0 (optional)
>> Second clock is also optional. Drop "(optional)" comment, just
>> confusing.
> 
> 
> GP0 has only one parent clock, while MCLK has three.
> 
> The second and third parent entries of GP0 are vacant,
> 
> so they need to be marked optional.
> 
> I will add the optional property for the second clock in the next revision.

How? Read the previous feedback...

Best regards,
Krzysztof