linux-kernel - Re: [PATCH v4 1/5] dt-bindings: misc: Add mikrobus-connector

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Date: Tue, 19 Mar 2024 07:03:19 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Ayush Singh <ayushdevel1325@...il.com>,
 open list <linux-kernel@...r.kernel.org>
Cc: jkridner@...gleboard.org, robertcnelson@...gleboard.org,
 lorforlinux@...gleboard.org, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>, Nishanth Menon <nm@...com>,
 Vignesh Raghavendra <vigneshr@...com>, Tero Kristo <kristo@...nel.org>,
 Derek Kiernan <derek.kiernan@....com>, Dragan Cvetic
 <dragan.cvetic@....com>, Arnd Bergmann <arnd@...db.de>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 Vaishnav M A <vaishnav.a@...com>, Mark Brown <broonie@...nel.org>,
 Johan Hovold <johan@...nel.org>, Alex Elder <elder@...nel.org>,
 "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
 <devicetree@...r.kernel.org>,
 "moderated list:ARM/TEXAS INSTRUMENTS K3 ARCHITECTURE"
 <linux-arm-kernel@...ts.infradead.org>,
 "open list:SPI SUBSYSTEM" <linux-spi@...r.kernel.org>,
 "moderated list:GREYBUS SUBSYSTEM" <greybus-dev@...ts.linaro.org>,
 Vaishnav M A <vaishnav@...gleboard.org>
Subject: Re: [PATCH v4 1/5] dt-bindings: misc: Add mikrobus-connector

On 17/03/2024 20:37, Ayush Singh wrote:
> Add DT bindings for mikroBUS interface. MikroBUS is an open standard
> developed by MikroElektronika for connecting add-on boards to
> microcontrollers or microprocessors.
> 

..

> +title: mikroBUS add-on board socket
> +
> +maintainers:
> +  - Ayush Singh <ayushdevel1325@...il.com>
> +
> +properties:
> +  compatible:
> +    const: mikrobus-connector
> +
> +  pinctrl-0: true
> +  pinctrl-1: true
> +  pinctrl-2: true
> +  pinctrl-3: true
> +  pinctrl-4: true
> +  pinctrl-5: true
> +  pinctrl-6: true
> +  pinctrl-7: true
> +  pinctrl-8: true
> +
> +  pinctrl-names:
> +    items:
> +      - const: default
> +      - const: pwm_default
> +      - const: pwm_gpio
> +      - const: uart_default
> +      - const: uart_gpio
> +      - const: i2c_default
> +      - const: i2c_gpio
> +      - const: spi_default
> +      - const: spi_gpio
> +
> +  mikrobus-gpios:
> +    minItems: 11
> +    maxItems: 12

I don't see any of the issues resolved which I raised at v3. I think
Russell pointed that you do not have EEPROM and that some pins are
optional. You do not allow that.

Plus I don't see him being Cced but he had quite detailed look and
comments at your patchset, so *you are supposed to Cc* him.

I also do not see Rob's comments fully addressed.

Do not send next versions before resolving previous discusssion.

> +
> +  i2c-adapter:
> +    description: i2c adapter attached to the mikrobus socket.
> +    $ref: /schemas/types.yaml#/definitions/phandle
> +
> +  spi-controller:
> +    description: spi bus number of the spi-master attached to the mikrobus socket.
> +    $ref: /schemas/types.yaml#/definitions/phandle
> +
> +  uart:
> +    description: uart port attached to the mikrobus socket
> +    $ref: /schemas/types.yaml#/definitions/phandle
> +
> +  pwms:
> +    description: the pwm-controller corresponding to the mikroBUS PWM pin.
> +    maxItems: 1
> +
> +  spi-cs:
> +    description: spi chip-select numbers corresponding to the chip-selects on the mikrobus socket.
> +    $ref: /schemas/types.yaml#/definitions/uint32-array
> +    items:
> +      - description: chip select corresponding to CS pin
> +      - description: chip select corresponding to RST pin
> +
> +required:
> +  - compatible
> +  - pinctrl-0
> +  - pinctrl-1
> +  - pinctrl-2
> +  - pinctrl-3
> +  - pinctrl-4
> +  - pinctrl-5
> +  - pinctrl-6
> +  - pinctrl-7
> +  - pinctrl-8
> +  - i2c-adapter
> +  - spi-controller
> +  - spi-cs
> +  - uart
> +  - pwms
> +  - mikrobus-gpios
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/gpio/gpio.h>
> +
> +    mikrobus {
> +      compatible = "mikrobus-connector";
> +      pinctrl-names = "default", "pwm_default", "pwm_gpio","uart_default", "uart_gpio", "i2c_default",

Please properly wrap your code according to Linux and DTS coding style
documents.


Best regards,
Krzysztof