linux-kernel - Re: [PATCH 1/6] dt-bindings: pinctrl: Add support for BCM2712 pin controller

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Date: Sun, 14 Apr 2024 08:09:38 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Andrea della Porta <andrea.porta@...e.com>,
 Ulf Hansson <ulf.hansson@...aro.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>,
 Florian Fainelli <florian.fainelli@...adcom.com>,
 Broadcom internal kernel review list
 <bcm-kernel-feedback-list@...adcom.com>,
 Linus Walleij <linus.walleij@...aro.org>,
 Adrian Hunter <adrian.hunter@...el.com>, Kamal Dasu
 <kamal.dasu@...adcom.com>, Al Cooper <alcooperx@...il.com>,
 linux-mmc@...r.kernel.org, devicetree@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
 linux-gpio@...r.kernel.org, Jonathan Bell <jonathan@...pberrypi.com>,
 Phil Elwell <phil@...pberrypi.com>
Subject: Re: [PATCH 1/6] dt-bindings: pinctrl: Add support for BCM2712 pin
 controller

On 14/04/2024 00:14, Andrea della Porta wrote:
> Signed-off-by: Andrea della Porta <andrea.porta@...e.com>

Missing commit msg. We can't take empty commits. You have entire commit
msg to describe the hardware, why not doing this?


Plus, this wasn't even tested...

> ---
>  .../pinctrl/brcm,bcm2712-pinctrl.yaml         | 99 +++++++++++++++++++
>  1 file changed, 99 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/pinctrl/brcm,bcm2712-pinctrl.yaml
> 
> diff --git a/Documentation/devicetree/bindings/pinctrl/brcm,bcm2712-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/brcm,bcm2712-pinctrl.yaml
> new file mode 100644
> index 000000000000..2908dfe99f3e
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pinctrl/brcm,bcm2712-pinctrl.yaml
> @@ -0,0 +1,99 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/pinctrl/brcm,bcm2712-pinctrl.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Broadcom BCM2712 pin controller
> +
> +maintainers:
> +  - Andrea della Porta <andrea.porta@...e.com>
> +
> +description:
> +  Bindings for Broadcom's BCM2712 memory-mapped pin controller.

Drop "Bindings for" and describe hardware. Bindings do not have to tell
they are bindings, it's obvious. They cannot be anything else.

> +
> +properties:
> +  compatible:
> +    enum:
> +      - brcm,bcm2712-pinctrl
> +      - brcm,bcm2712-aon-pinctrl
> +      - brcm,bcm2712c0-pinctrl
> +      - brcm,bcm2712c0-aon-pinctrl
> +      - brcm,bcm2712d0-pinctrl
> +      - brcm,bcm2712d0-aon-pinctrl
> +
> +  reg:
> +    items:
> +      - description: pin control registers
> +
> +allOf:
> +  - $ref: pinctrl.yaml#
> +
> +required:
> +  - compatible
> +  - reg
> +
> +additionalProperties:
> +  anyOf:
> +    - type: object  
> +      allOf:
> +        - $ref: pincfg-node.yaml#
> +        - $ref: pinmux-node.yaml#
> +
> +      properties:
> +        function: 
> +          enum: [ gpio, alt1, alt2, alt3, alt4, alt5, alt6, alt7, alt8,
> +                 aon_cpu_standbyb, aon_fp_4sec_resetb, aon_gpclk, aon_pwm,
> +                 arm_jtag, aud_fs_clk0, avs_pmu_bsc, bsc_m0, bsc_m1, bsc_m2,
> +                 bsc_m3, clk_observe, ctl_hdmi_5v, enet0, enet0_mii,
> +                 enet0_rgmii, ext_sc_clk, fl0, fl1, gpclk0, gpclk1, gpclk2,
> +                 hdmi_tx0_auto_i2c, hdmi_tx0_bsc, hdmi_tx1_auto_i2c,
> +                 hdmi_tx1_bsc, i2s_in, i2s_out, ir_in, mtsif, mtsif_alt,
> +                 mtsif_alt1, pdm, pkt, pm_led_out, sc0, sd0, sd2, sd_card_a,
> +                 sd_card_b, sd_card_c, sd_card_d, sd_card_e, sd_card_f,
> +                 sd_card_g, spdif_out, spi_m, spi_s, sr_edm_sense, te0, te1,
> +                 tsio, uart0, uart1, uart2, usb_pwr, usb_vbus, uui, vc_i2c0,
> +                 vc_i2c3, vc_i2c4, vc_i2c5, vc_i2csl, vc_pcm, vc_pwm0,
> +                 vc_pwm1, vc_spi0, vc_spi3, vc_spi4, vc_spi5, vc_uart0,
> +                 vc_uart2, vc_uart3, vc_uart4 ]
> +
> +        pins:
> +          items:
> +            pattern: "^((aon_)?s?gpio[0-6]?[0-9])|(emmc_(clk|cmd|dat[0-7]|ds))$"
> +
> +        bias-disable: true
> +        bias-pull-down: true
> +        bias-pull-up: true
> +      additionalProperties: false
> +
> +    - type: object
> +      additionalProperties:
> +        $ref: "#/additionalProperties/anyOf/0"
> +
> +examples:
> +  - |
> +    pinctrl: pinctrl@...04100 {
> +      compatible = "brcm,bcm2712-pinctrl";
> +        reg = <0x7d504100 0x30>;
> +
> +        uarta_24_pins: uarta_24_pins {

Underscores are not allowed. Please observe the rules of DTS coding
style (see docs).

> +          pin_rts {
> +            function = "uart0";
> +            pins = "gpio24";
> +            bias-disable;
> +        };
> +
> +        pin_cts {
> +            function = "uart0";
> +            pins = "gpio25";
> +            bias-pull-up;
> +        };
> +      };
> +
> +      spi10_gpio2: spi10_gpio2 {
> +        function = "vc_spi0";
> +        pins = "gpio2", "gpio3", "gpio4";

Messed indentation. Keep 4 space.

> +        bias-disable;
> +      };
> +    };
> +...

Best regards,
Krzysztof