Message-ID: <7b269c9f-803e-69d6-9416-1620e1726e7e@kernel.org>
Date:   Thu, 9 Mar 2023 07:15:36 +0100
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101
 Thunderbird/102.8.0
Subject: Re: [PATCH V2 6/6] arm64: tegra: Add GTE nodes
Content-Language: en-US
To:     Dipen Patel <dipenp@nvidia.com>, thierry.reding@gmail.com,
        jonathanh@nvidia.com, linux-kernel@vger.kernel.org,
        linux-tegra@vger.kernel.org, linux-gpio@vger.kernel.org,
        linus.walleij@linaro.org, devicetree@vger.kernel.org,
        linux-doc@vger.kernel.org, robh+dt@kernel.org,
        timestamp@lists.linux.dev
References: <20230214115553.10416-1-dipenp@nvidia.com>
 <20230214115553.10416-7-dipenp@nvidia.com>
 <16e3ddb4-219e-70a8-8644-c62973f84d31@kernel.org>
 <ef58cd61-f90d-f242-9923-e9544d1aa963@nvidia.com>
From:   Krzysztof Kozlowski <krzk@kernel.org>
In-Reply-To: <ef58cd61-f90d-f242-9923-e9544d1aa963@nvidia.com>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Precedence: bulk

On 08/03/2023 21:13, Dipen Patel wrote:
> On 2/16/23 6:18 AM, Krzysztof Kozlowski wrote:
>> On 14/02/2023 12:55, Dipen Patel wrote:
>>> Add GTE nodes for the tegra234. Also modify AON GTE nodes for the
>>> tegra194 to remove nvidia,slice property and add nvidia,gpio-controller
>>> propertyto specify AON GPIO controller node so that GTE driver can
>>> do namespace conversion between GPIO lines provided by the gpiolib
>>> framework and hardware timestamping engine subsystem.
>>>
>>> Signed-off-by: Dipen Patel <dipenp@nvidia.com>
>>> ---
>>>  arch/arm64/boot/dts/nvidia/tegra194.dtsi |  3 +--
>>>  arch/arm64/boot/dts/nvidia/tegra234.dtsi | 19 +++++++++++++++++++
>>>  2 files changed, 20 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/arch/arm64/boot/dts/nvidia/tegra194.dtsi b/arch/arm64/boot/dts/nvidia/tegra194.dtsi
>>> index 4afcbd60e144..4c92850b1ec4 100644
>>> --- a/arch/arm64/boot/dts/nvidia/tegra194.dtsi
>>> +++ b/arch/arm64/boot/dts/nvidia/tegra194.dtsi
>>> @@ -1363,7 +1363,6 @@
>>>  			reg = <0x3aa0000 0x10000>;
>>>  			interrupts = <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>;
>>>  			nvidia,int-threshold = <1>;
>>> -			nvidia,slices = <11>;
>>>  			#timestamp-cells = <1>;
>>>  			status = "okay";
>>>  		};
>>> @@ -1586,7 +1585,7 @@
>>>  			reg = <0xc1e0000 0x10000>;
>>>  			interrupts = <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>;
>>>  			nvidia,int-threshold = <1>;
>>> -			nvidia,slices = <3>;
>>> +			nvidia,gpio-controller = <&gpio_aon>;
>>>  			#timestamp-cells = <1>;
>>>  			status = "okay";
>>>  		};
>>> diff --git a/arch/arm64/boot/dts/nvidia/tegra234.dtsi b/arch/arm64/boot/dts/nvidia/tegra234.dtsi
>>> index eaf05ee9acd1..4a87490c5fd4 100644
>>> --- a/arch/arm64/boot/dts/nvidia/tegra234.dtsi
>>> +++ b/arch/arm64/boot/dts/nvidia/tegra234.dtsi
>>> @@ -1086,6 +1086,15 @@
>>>  			clock-names = "fuse";
>>>  		};
>>>  
>>> +		hte_lic: hardware-timestamp@3aa0000 {
>>> +			compatible = "nvidia,tegra234-gte-lic";
>>> +			reg = <0x3aa0000 0x10000>;
>>> +			interrupts = <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>;
>>> +			nvidia,int-threshold = <1>;
>>> +			#timestamp-cells = <1>;
>>> +			status = "okay";
>>
>> Why do you need status? It's okay by default.
> what's harm of having to explicitly mentioned? 

Because useless code is not helping any review. We do not add other
useless properties, or shall we add them?

>I can see status = okay in this dtsi file
> for other nodes as well and was just following that.

So if you see a bug somewhere, you also duplicate it in your code?


Best regards,
Krzysztof