linux-kernel - Re: [RFC PATCH 3/7] dt-bindings: bus: add STM32MP15 ETZPC firewall bus bindings

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Message-ID: <879325d2-4b2d-bc1d-310c-ece4c449ad8f@kernel.org>
Date:   Thu, 22 Dec 2022 11:26:05 +0100
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Gatien Chevallier <gatien.chevallier@...s.st.com>,
        alexandre.torgue@...s.st.com, robh+dt@...nel.org,
        Oleksii_Moisieiev@...m.com, linus.walleij@...aro.org,
        gregkh@...uxfoundation.org
Cc:     linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        loic.pallardy@...com, devicetree@...r.kernel.org,
        mark.rutland@....com, arnd@...db.de
Subject: Re: [RFC PATCH 3/7] dt-bindings: bus: add STM32MP15 ETZPC firewall
 bus bindings

On 21/12/2022 18:30, Gatien Chevallier wrote:
> Adds the list of peripherals IDs under firewall bus on STM32MP15.
> 
> Signed-off-by: Gatien Chevallier <gatien.chevallier@...s.st.com>
> ---
>  include/dt-bindings/bus/stm32mp15_sys_bus.h | 98 +++++++++++++++++++++
>  1 file changed, 98 insertions(+)
>  create mode 100644 include/dt-bindings/bus/stm32mp15_sys_bus.h
> 
> diff --git a/include/dt-bindings/bus/stm32mp15_sys_bus.h b/include/dt-bindings/bus/stm32mp15_sys_bus.h
> new file mode 100644
> index 000000000000..97eacc7b5f16
> --- /dev/null
> +++ b/include/dt-bindings/bus/stm32mp15_sys_bus.h

That's wrong in multiple ways:
1. No underscores
2. Missing vendor prefix
3. Name not matching compatible.

> @@ -0,0 +1,98 @@
> +/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
> +/*
> + * Copyright (C) STMicroelectronics 2022 - All Rights Reserved
> + */
> +#ifndef _DT_BINDINGS_BUS_STM32MP15_SYS_BUS_H
> +#define _DT_BINDINGS_BUS_STM32MP15_SYS_BUS_H
> +
> +/* ETZPC IDs */
> +#define STM32MP1_ETZPC_STGENC_ID	0
> +#define STM32MP1_ETZPC_BKPSRAM_ID	1
> +#define STM32MP1_ETZPC_IWDG1_ID		2
> +#define STM32MP1_ETZPC_USART1_ID	3
> +#define STM32MP1_ETZPC_SPI6_ID		4
> +#define STM32MP1_ETZPC_I2C4_ID		5
> +/* ID 6 reserved */

Reserved why? These are IDs so they start from 0 and go by 0. Don't
hard-code some register offsets.

Best regards,
Krzysztof