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Tue, 17 Oct 2023 22:58:15 -0700 (PDT) Message-ID: <6c8a3ed2-879c-4423-b6e7-80f8b127a1c1@linaro.org> Date: Wed, 18 Oct 2023 07:58:13 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/4] dt-bindings: pinctrl: Document nuvoton ma35d1 pin control To: Jacky Huang , linus.walleij@linaro.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, p.zabel@pengutronix.de, j.neuschaefer@gmx.net Cc: linux-arm-kernel@lists.infradead.org, linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, schung@nuvoton.com, Jacky Huang References: <20231011090510.114476-1-ychuang570808@gmail.com> <20231011090510.114476-3-ychuang570808@gmail.com> <7800b2d6-33c4-4c4f-8d0c-c11ff0e47535@linaro.org> <17a80031-98bf-48bf-8cea-c0ca4400f142@gmail.com> <254837e5-a0fa-4796-8928-277db4b98bf1@linaro.org> <8e983479-709f-4ec8-85e2-c46a5256a2ec@gmail.com> Content-Language: en-US From: Krzysztof Kozlowski Autocrypt: addr=krzysztof.kozlowski@linaro.org; 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charset=UTF-8 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-0.8 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on pete.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (pete.vger.email [0.0.0.0]); Tue, 17 Oct 2023 22:58:36 -0700 (PDT) On 18/10/2023 05:26, Jacky Huang wrote: > Dear Krzysztof, > > Thank you for the review. > > > On 2023/10/17 上午 03:52, Krzysztof Kozlowski wrote: >> On 16/10/2023 06:32, Jacky Huang wrote: >>>>> + '#size-cells': >>>>> + const: 1 >>>>> + >>>>> + nuvoton,sys: >>>>> + description: >>>>> + phandle to the syscon node >>>> sys is quite generic. Description explains nothing except duplicating >>>> known information. Drop duplicated info and instead explain to what this >>>> phandle points and how it is going to be used. >> Read comments carefully. > > > I will update the description of 'nuvoton,sys'. What is the full name of destination block? > >> >>>> >>>>> + $ref: /schemas/types.yaml#/definitions/phandle-array >>>>> + items: >>>>> + maxItems: 1 >>>> So just phandle, not phandle-array, unless it is defined like this in >>>> some other binding. >>> I would like to update this as: >>> >>>   nuvoton,sys: >> Nothing improved. > > Here just fix  the 'phandle-array' to 'phandle' and remove 'maxItems'. > >>>     $ref: /schemas/types.yaml#/definitions/phandle >>>     description: >>>       Help pinctrl driver to access system registers by means of regmap. >> Driver is not relevant here. Say which part of syscon are necessary for >> pinctrl operation. >> > > I will update description as: > >   nuvoton,sys: >     $ref: /schemas/types.yaml#/definitions/phandle >     description: >       The pin function control registers are located in the system >       control register space. This phandle provides pinctrl the >       ability to access the pin function control registers through >       the use of regmap. regmap is unrelated to the bindings. > >>>>> + maximum: 7 >>>>> + >>>>> + input-enable: true >>>>> + >>>>> + input-schmitt-enable: true >>>>> + >>>>> + power-source: >>>>> + description: >>>>> + I/O voltage in millivolt. >>>>> + enum: [ 1800, 3300 ] >>>> Missing units in property name. power-source also does not really >>>> describe the property. >>> >>> The output voltage level of GPIO can be configured as 1.8V or 3.3V, >>> but I cannot find any suitable output properties in 'pincfg-node.yaml.' >> There is actually power-source, but treated as actual choice of power >> supplies. >> >>> I noticed that 'xlnx,zynq-pinctrl.yaml' and 'xlnx,zynq-pinctrl.yaml' use >>> 'power source' to specify the output voltage.  Should I follow their >>> approach or define a vendor-specific one? >> Maybe Rob or Linus have here some recommendation, but I would suggest to >> go either with rtd1319d-pinctrl.yaml approach or add a generic property >> to pincfg-node expressed in real units like "io-microvolt". > > OK, I will update it as: > >       power-source: >         description: | >           Valid arguments are described as below: >           0: power supply of 1.8V >           1: power supply of 3.3V >         enum: [0, 1] > > >> Rob, Linus, any ideas for generic property replacing register-specific >> power-source? I proposed io-microvolt Best regards, Krzysztof