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Subject: Re: [PATCH 1/3] dt-bindings: phy: amlogic,meson-axg-mipi-pcie-analog:
 remove reg attribute
To:     Rob Herring <robh@kernel.org>
Cc:     kishon@ti.com, repk@triplefau.lt, devicetree@vger.kernel.org,
        linux-amlogic@lists.infradead.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
References: <20200907073402.26674-1-narmstrong@baylibre.com>
 <20200907073402.26674-2-narmstrong@baylibre.com>
 <20200908195003.GB790974@bogus>
From:   Neil Armstrong <narmstrong@baylibre.com>
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Organization: Baylibre
Message-ID: <cdff79f6-d0b1-6ab2-b0e7-1a342d6743c5@baylibre.com>
Date:   Wed, 9 Sep 2020 09:31:35 +0200
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Hi,

On 08/09/2020 21:50, Rob Herring wrote:
> On Mon, Sep 07, 2020 at 09:34:00AM +0200, Neil Armstrong wrote:
>> The Amlogic AXG MIPI + PCIe Analog PHY should be a subnode of the hhi mfd
>> node like the axg-clkc node.
>>
>> Thus the reg attribute is not needed.
> 
> If the phy registers have an address then it should remain even if Linux 
> happens to not care. The exception is if the registers are all 
> interleaved with other stuff.

This is not really a question about linux using it or not.

The PHY registers happens to be at the beginning of a large zone containing
interleaved system registers (mainly clocks, power management, PHY control..).

The goal is to model it the same way as the other "features" of this zone,
like Documentation/devicetree/bindings/clock/amlogic,gxbb-clkc.txt
and Documentation/devicetree/bindings/power/amlogic,meson-ee-pwrc.yaml
and have a coherent bindings scheme.

Neil

> 
>>
>> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
>> ---
>>  .../bindings/phy/amlogic,meson-axg-mipi-pcie-analog.yaml      | 4 ----
>>  1 file changed, 4 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/phy/amlogic,meson-axg-mipi-pcie-analog.yaml b/Documentation/devicetree/bindings/phy/amlogic,meson-axg-mipi-pcie-analog.yaml
>> index 18c1ec5e19ad..a9040aa387cf 100644
>> --- a/Documentation/devicetree/bindings/phy/amlogic,meson-axg-mipi-pcie-analog.yaml
>> +++ b/Documentation/devicetree/bindings/phy/amlogic,meson-axg-mipi-pcie-analog.yaml
>> @@ -13,15 +13,11 @@ properties:
>>    compatible:
>>      const: amlogic,axg-mipi-pcie-analog-phy
>>  
>> -  reg:
>> -    maxItems: 1
>> -
>>    "#phy-cells":
>>      const: 1
>>  
>>  required:
>>    - compatible
>> -  - reg
>>    - "#phy-cells"
>>  
>>  additionalProperties: false
>> -- 
>> 2.22.0
>>