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([2a01:e0a:982:cbb0:f692:a800:4794:385]) by smtp.gmail.com with ESMTPSA id r19-20020a05600c285300b003f605566610sm17944436wmb.13.2023.06.22.01.13.44 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 22 Jun 2023 01:13:44 -0700 (PDT) Message-ID: <2fe41e89-9a26-e7ba-6ef6-2c9262bda43d@linaro.org> Date: Thu, 22 Jun 2023 10:13:43 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.12.0 From: Neil Armstrong Subject: Re: [PATCH v3 2/3] dt-bindings: serial: amlogic,meson-uart: Add compatible string for T7 Content-Language: en-US To: tanure@linux.com, Conor Dooley Cc: Krzysztof Kozlowski , Conor Dooley , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jerome Brunet , Kevin Hilman , Nick , Artem , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-amlogic@lists.infradead.org, linux-arm-kernel@lists.infradead.org References: <20230621133215.109254-1-tanure@linux.com> <20230621133215.109254-3-tanure@linux.com> 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([2a01:e0a:982:cbb0:f692:a800:4794:385]) by smtp.gmail.com with ESMTPSA id r19-20020a05600c285300b003f605566610sm17944436wmb.13.2023.06.22.01.13.44 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 22 Jun 2023 01:13:44 -0700 (PDT) Message-ID: <2fe41e89-9a26-e7ba-6ef6-2c9262bda43d@linaro.org> Date: Thu, 22 Jun 2023 10:13:43 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.12.0 From: Neil Armstrong Reply-To: neil.armstrong@linaro.org Subject: Re: [PATCH v3 2/3] dt-bindings: serial: amlogic,meson-uart: Add compatible string for T7 Content-Language: en-US To: tanure@linux.com, Conor Dooley Cc: Krzysztof Kozlowski , Conor Dooley , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jerome Brunet , Kevin Hilman , Nick , Artem , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-amlogic@lists.infradead.org, linux-arm-kernel@lists.infradead.org References: <20230621133215.109254-1-tanure@linux.com> <20230621133215.109254-3-tanure@linux.com> <20f25e98-d02e-f914-c4e7-72bb9ddb1ae5@linaro.org> <20230621-uncaring-impeding-15cfbe8e0e7c@spud> <20230622-hardhat-elitism-26f0d0df204f@wendy> Organization: Linaro Developer Services In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On 22/06/2023 09:36, Lucas Tanure wrote: > On Thu, Jun 22, 2023 at 8:12 AM Conor Dooley wrote: >> >> On Thu, Jun 22, 2023 at 07:43:31AM +0100, Lucas Tanure wrote: >>> On Thu, Jun 22, 2023 at 7:05 AM Krzysztof Kozlowski >>> wrote: >>>> On 22/06/2023 07:32, Lucas Tanure wrote: >>>>> On Wed, Jun 21, 2023 at 7:12 PM Conor Dooley wrote: >>>>>> On Wed, Jun 21, 2023 at 03:53:04PM +0200, Krzysztof Kozlowski wrote: >>>>>>> On 21/06/2023 15:32, Lucas Tanure wrote: >>>>>>>> Amlogic T7 SoCs uses the same UART controller as S4 SoCs and G12A. >>>>>>>> There is no need for an extra compatible line in the driver, but >>>>>>>> add T7 compatible line for documentation. >>>>>>>> >>>>>>>> Signed-off-by: Lucas Tanure >>>>>>>> --- >>>>>>>> .../devicetree/bindings/serial/amlogic,meson-uart.yaml | 2 ++ >>>>>>>> 1 file changed, 2 insertions(+) >>>>>>>> >>>>>>>> diff --git a/Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml b/Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml >>>>>>>> index 01ec45b3b406..860ab58d87b0 100644 >>>>>>>> --- a/Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml >>>>>>>> +++ b/Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml >>>>>>>> @@ -33,6 +33,7 @@ properties: >>>>>>>> - amlogic,meson8b-uart >>>>>>>> - amlogic,meson-gx-uart >>>>>>>> - amlogic,meson-s4-uart >>>>>>>> + - amlogic,meson-t7-uart >>>>>>>> - const: amlogic,meson-ao-uart >>>>>>>> - description: Always-on power domain UART controller on G12A SoCs >>>>>>>> items: >>>>>>>> @@ -46,6 +47,7 @@ properties: >>>>>>>> - amlogic,meson8b-uart >>>>>>>> - amlogic,meson-gx-uart >>>>>>>> - amlogic,meson-s4-uart >>>>>>>> + - amlogic,meson-t7-uart >>>>>>> >>>>>>> It does not look like you tested the DTS against bindings. Please run >>>>>>> `make dtbs_check` (see >>>>>>> Documentation/devicetree/bindings/writing-schema.rst or >>>>>>> https://www.linaro.org/blog/tips-and-tricks-for-validating-devicetree-sources-with-the-devicetree-schema/ >>>>>>> for instructions). >>>>>> >>>>>> Check back on the previous version, I should've posted an untested >>>>>> version of what you need to add. >>>>> I saw that, but adding a S4 doesn't make sense to me. And you didn't >>>>> show the entire change, so I can't understand what you want there. >>>> >>>> For sure you need something which does not trigger errors. If you claim >>>> adding S4 as fallback does not make sense, then why did you use it? >>>> Sending a code which is clearly incorrect does not make sense. >>>> >>> Sorry, I think we are talking about different things. It does not make >>> sense to me to add an S4 line in the documentation when it is already >>> there. So I could not understand or make sense of the patch Conor sent >>> in reply to my V2. >> >> That is just how it works. You need to spell out exactly which >> combinations are permitted. The current entry for s4 says that s4 is >> only permitted in isolation. >> Since you are adding "amlogic,meson-t7-uart", "amlogic,meson-s4-uart" >> you need to explicitly allow that combination. You'll notice if you look >> at the file that the gx uart appears more than once. >> >> Given the g12a was the most recently added compatible, it might make >> sense to follow the pattern that it had set, given the thing your >> original patch copied the match data from was the g12a. That change to >> the dt-binding would look like: >> diff --git a/Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml b/Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml >> index 01ec45b3b406..eae11e87b88a 100644 >> --- a/Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml >> +++ b/Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml >> @@ -50,6 +50,13 @@ properties: >> items: >> - const: amlogic,meson-g12a-uart >> - const: amlogic,meson-gx-uart >> + - description: >> + Everything-Else power domain UART controller on G12A compatible SoCs >> + items: >> + - enum: >> + - amlogic,meson-t7-uart >> + - const: amlogic,meson-g12a-uart >> + - const: amlogic,meson-gx-uart >> >> reg: >> maxItems: 1 >> >> /I/ don't really care whether you do that, or do the s4 version of it, >> but following the most recent pattern might make more sense. When I >> suggested s4, it was because I only looked at the driver patch rather >> than the code itself. >> >>> Krzysztof, I will check again with dtbs_check and re-send. >> >> Cheers, >> Conor. > I am struggling to understand this. Everything I try fails the check. I just applied Conor's change on top of v6.4-rc1 and ran: make dt_binding_check DT_SCHEMA_FILES=Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml and the check was successful. Neil