linux-kernel - Re: [PATCH v5 4/5] clk: stm32: introduce clocks for STM32MP257 platform

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Message-ID: <ec1912eab8bead59f520c48b6d73a084fd07732d.camel@pengutronix.de>
Date:   Wed, 06 Dec 2023 15:20:20 +0100
From:   Philipp Zabel <p.zabel@...gutronix.de>
To:     gabriel.fernandez@...s.st.com,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>
Cc:     linux-clk@...r.kernel.org, devicetree@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 4/5] clk: stm32: introduce clocks for STM32MP257
 platform

Hi Gabriel,

On Mi, 2023-12-06 at 15:00 +0100, gabriel.fernandez@...s.st.com wrote:
> From: Gabriel Fernandez <gabriel.fernandez@...s.st.com>
> 
> This driver is intended for the STM32MP25 clock family and utilizes
> the stm32-core API, similar to the stm32mp13 clock driver.
> 
> Signed-off-by: Gabriel Fernandez <gabriel.fernandez@...s.st.com>
> ---
[...]
> diff --git a/drivers/clk/stm32/stm32mp25_rcc.h b/drivers/clk/stm32/stm32mp25_rcc.h
> new file mode 100644
> index 000000000000..b1aca78a0b22
> --- /dev/null
> +++ b/drivers/clk/stm32/stm32mp25_rcc.h
> @@ -0,0 +1,4977 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +/*
> + * Copyright (C) STMicroelectronics 2023 - All Rights Reserved
> + * Author: Gabriel Fernandez <gabriel.fernandez@...s.st.com> for STMicroelectronics.
> + */
> +
> +#ifndef STM32MP25_RCC_H
> +#define STM32MP25_RCC_H
> +
> +#define RCC_SECCFGR0				0x0
[...]

What is the purpose of all the unused #defines?

I initially wanted to point out that the _SHIFT #defines are redundant
because the same information is already contained in the corresponding
_MASK #defines, but it seems like neither of the register field
definitions are used anywhere. It appears only some of the *CFGR
register offset #defines are actually used.

regards
Philipp