linux-kernel - Re: [PATCH v5 8/9] reset: amlogic: split the device core and platform probe

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Message-ID: <8cb81058c8f45e378675e078e296336a2cf74308.camel@pengutronix.de>
Date: Thu, 12 Sep 2024 10:12:14 +0200
From: Philipp Zabel <p.zabel@...gutronix.de>
To: Jerome Brunet <jbrunet@...libre.com>, Stephen Boyd <sboyd@...nel.org>, 
 Neil Armstrong <neil.armstrong@...aro.org>, Kevin Hilman
 <khilman@...libre.com>, Martin Blumenstingl
 <martin.blumenstingl@...glemail.com>, Jiucheng Xu <jiucheng.xu@...ogic.com>
Cc: linux-arm-kernel@...ts.infradead.org, linux-amlogic@...ts.infradead.org,
  linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 8/9] reset: amlogic: split the device core and
 platform probe

On Di, 2024-09-10 at 18:32 +0200, Jerome Brunet wrote:
> To prepare the addition of the auxiliary device support, split
> out the device coomon functions from the probe of the platform device.
> 
> The device core function will be common to both the platform and auxiliary
> driver.
> 
> Signed-off-by: Jerome Brunet <jbrunet@...libre.com>
> ---
>  drivers/reset/amlogic/Kconfig              |   7 +-
>  drivers/reset/amlogic/Makefile             |   1 +
>  drivers/reset/amlogic/reset-meson-common.c | 121 ++++++++++++++++++++++++++++
>  drivers/reset/amlogic/reset-meson.c        | 122 ++++-------------------------
>  drivers/reset/amlogic/reset-meson.h        |  24 ++++++
>  5 files changed, 167 insertions(+), 108 deletions(-)
> 
> diff --git a/drivers/reset/amlogic/Kconfig b/drivers/reset/amlogic/Kconfig
> index 532e6a4f7865..1d77987088f4 100644
> --- a/drivers/reset/amlogic/Kconfig
> +++ b/drivers/reset/amlogic/Kconfig
> @@ -1,10 +1,15 @@
> +config RESET_MESON_COMMON
> +	tristate
> +	select REGMAP
> +
>  config RESET_MESON
>  	tristate "Meson Reset Driver"
>  	depends on ARCH_MESON || COMPILE_TEST
>  	default ARCH_MESON
>  	select REGMAP_MMIO
> +	select RESET_MESON_COMMON
>  	help
> -	  This enables the reset driver for Amlogic Meson SoCs.
> +	  This enables the reset driver for Amlogic SoCs.
>  
>  config RESET_MESON_AUDIO_ARB
>  	tristate "Meson Audio Memory Arbiter Reset Driver"
> diff --git a/drivers/reset/amlogic/Makefile b/drivers/reset/amlogic/Makefile
> index 55509fc78513..74aaa2fb5e13 100644
> --- a/drivers/reset/amlogic/Makefile
> +++ b/drivers/reset/amlogic/Makefile
> @@ -1,2 +1,3 @@
>  obj-$(CONFIG_RESET_MESON) += reset-meson.o
> +obj-$(CONFIG_RESET_MESON_COMMON) += reset-meson-common.o
>  obj-$(CONFIG_RESET_MESON_AUDIO_ARB) += reset-meson-audio-arb.o
> diff --git a/drivers/reset/amlogic/reset-meson-common.c b/drivers/reset/amlogic/reset-meson-common.c
> new file mode 100644
> index 000000000000..d57544801ae9
> --- /dev/null
> +++ b/drivers/reset/amlogic/reset-meson-common.c
> @@ -0,0 +1,121 @@
> +// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
> +/*
> + * Amlogic Meson Reset core functions
> + *
> + * Copyright (c) 2016-2024 BayLibre, SAS.
> + * Authors: Neil Armstrong <narmstrong@...libre.com>
> + *          Jerome Brunet <jbrunet@...libre.com>
> + */
> +
> +#include <linux/device.h>
> +#include <linux/module.h>
> +#include <linux/regmap.h>
> +#include <linux/reset-controller.h>
> +
> +#include "reset-meson.h"
> +
> +struct meson_reset {
> +	const struct meson_reset_param *param;
> +	struct reset_controller_dev rcdev;
> +	struct regmap *map;
> +};
> +
> +static void meson_reset_offset_and_bit(struct meson_reset *data,
> +				       unsigned long id,
> +				       unsigned int *offset,
> +				       unsigned int *bit)
> +{
> +	unsigned int stride = regmap_get_reg_stride(data->map);
> +
> +	*offset = (id / (stride * BITS_PER_BYTE)) * stride;
> +	*bit = id % (stride * BITS_PER_BYTE);
> +}
> +
> +static int meson_reset_reset(struct reset_controller_dev *rcdev,
> +			     unsigned long id)

checkpatch --strict complains about the alignment here.
I'll fix this up when applying, no need to resend.

regards
Philipp