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Thu, 25 Jan 2024 02:32:23 -0800 (PST) Received: from [192.168.1.20] ([178.197.215.66]) by smtp.gmail.com with ESMTPSA id vw16-20020a170907a71000b00a2fc36776a7sm891684ejc.19.2024.01.25.02.32.22 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 25 Jan 2024 02:32:23 -0800 (PST) Message-ID: Date: Thu, 25 Jan 2024 11:32:21 +0100 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 1/2] dt-bindings: usb: mt6360-tcpc: Drop interrupt-names Content-Language: en-US To: AngeloGioacchino Del Regno , Conor Dooley , robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org Cc: chunfeng.yun@mediatek.com, gregkh@linuxfoundation.org, conor+dt@kernel.org, matthias.bgg@gmail.com, linux@roeck-us.net, heikki.krogerus@linux.intel.com, cy_huang@richtek.com, linux-usb@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20240119094105.98312-1-angelogioacchino.delregno@collabora.com> <20240119-eldest-discharge-e2d3812be0a9@spud> <12b7b339-498b-45c1-bc5e-05e07660aefa@collabora.com> <20240123-procurer-jumbo-ebbec485505d@spud> <4fdbc3d8-3d44-4c2c-aae6-daa0b431e1c9@collabora.com> From: Krzysztof Kozlowski Autocrypt: addr=krzysztof.kozlowski@linaro.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 24/01/2024 09:48, AngeloGioacchino Del Regno wrote: > Il 23/01/24 18:14, Conor Dooley ha scritto: >> On Mon, Jan 22, 2024 at 11:32:30AM +0100, AngeloGioacchino Del Regno wrote: >>> Il 19/01/24 17:32, Conor Dooley ha scritto: >>>> On Fri, Jan 19, 2024 at 10:41:04AM +0100, AngeloGioacchino Del Regno wrote: >>>>> This IP has only one interrupt, hence interrupt-names is not necessary >>>>> to have. >>>>> Since there is no user yet, simply remove interrupt-names. >>>> >>>> I'm a bit confused chief. Patch 2 in this series removes a user of this >>>> property from a driver, so can you explain how this statement is true? >>>> >>>> Maybe I need to drink a few cans of Monster and revisit this patchset? >>>> >>> >>> What I mean with "there is no user" is that there's no device tree with any >>> mt6360-tcpc node upstream yet, so there is no meaningful ABI breakage. >>> Different story would be if there was a device tree using this already, in >>> which case, you can make a required property optional but not remove it. >> >> Not every devicetree lives within the kernel.. If the driver is using >> it, I'm not inclined to agree that it should be removed. > > I get the point, but as far as I remember, it's not the first time that this > kind of change is upstreamed. > > I'm fine with keeping things as they are but, since my intention is to actually > introduce an actual user of this binding upstream, and that actually depends on > if this change is accepted or not (as I have to know whether I can omit adding > the interrupt-names property or not).... > > ....may I ask for more feedback/opinions from Rob and/or Krzk? Driver is the user and this is an old binding (released!), thus there can be out-of-kernel users already. Minor cleanup is not really a reason to affect ABI. You could deprecate it, though. Driver change is fine. Best regards, Krzysztof