linux-kernel - Re: [PATCH v3 6/8] reset: imx8mp-audiomix: Extend the driver usage

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Message-ID: <aQJD/I+fPNobYBAW@lizhi-Precision-Tower-5810>
Date: Wed, 29 Oct 2025 12:42:36 -0400
From: Frank Li <Frank.li@....com>
To: Laurentiu Mihalcea <laurentiumihalcea111@...il.com>
Cc: Abel Vesa <abelvesa@...nel.org>, Peng Fan <peng.fan@....com>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
	Fabio Estevam <festevam@...il.com>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Daniel Baluta <daniel.baluta@....com>,
	Shengjiu Wang <shengjiu.wang@....com>, linux-clk@...r.kernel.org,
	imx@...ts.linux.dev, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Pengutronix Kernel Team <kernel@...gutronix.de>
Subject: Re: [PATCH v3 6/8] reset: imx8mp-audiomix: Extend the driver usage

On Wed, Oct 29, 2025 at 06:52:27AM -0700, Laurentiu Mihalcea wrote:
> From: Laurentiu Mihalcea <laurentiu.mihalcea@....com>
>
> Replace the previous approach, in which a single reset map is used, by a
> per-driver approach, in which each auxiliary device driver holds a
> reference to a certain reset map.

Needn't "Replace the previous approach".

Replace single reset map with per-device reset map to allow the driver to
be reused for other NXP block.

>
> This change is needed to allow the driver to be reused for other NXP block
> control IPs such as i.MX8ULP's SIM LPAV.

avoid use words "this change[patch]"

Frank
>
> Reviewed-by: Daniel Baluta <daniel.baluta@....com>
> Signed-off-by: Laurentiu Mihalcea <laurentiu.mihalcea@....com>
> ---
>  drivers/reset/reset-imx8mp-audiomix.c | 18 ++++++++++++++++--
>  1 file changed, 16 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/reset/reset-imx8mp-audiomix.c b/drivers/reset/reset-imx8mp-audiomix.c
> index 3f6d11270918..5ee5a32c6950 100644
> --- a/drivers/reset/reset-imx8mp-audiomix.c
> +++ b/drivers/reset/reset-imx8mp-audiomix.c
> @@ -23,7 +23,12 @@ struct imx8mp_reset_map {
>  	bool active_low;
>  };
>
> -static const struct imx8mp_reset_map reset_map[] = {
> +struct imx8mp_reset_info {
> +	const struct imx8mp_reset_map *map;
> +	int num_lines;
> +};
> +
> +static const struct imx8mp_reset_map imx8mp_reset_map[] = {
>  	[IMX8MP_AUDIOMIX_EARC_RESET] = {
>  		.offset	= IMX8MP_AUDIOMIX_EARC_RESET_OFFSET,
>  		.mask = BIT(0),
> @@ -41,10 +46,16 @@ static const struct imx8mp_reset_map reset_map[] = {
>  	},
>  };
>
> +static const struct imx8mp_reset_info imx8mp_reset_info = {
> +	.map = imx8mp_reset_map,
> +	.num_lines = ARRAY_SIZE(imx8mp_reset_map),
> +};
> +
>  struct imx8mp_audiomix_reset {
>  	struct reset_controller_dev rcdev;
>  	void __iomem *base;
>  	struct regmap *regmap;
> +	const struct imx8mp_reset_info *rinfo;
>  };
>
>  static struct imx8mp_audiomix_reset *to_imx8mp_audiomix_reset(struct reset_controller_dev *rcdev)
> @@ -56,6 +67,7 @@ static int imx8mp_audiomix_update(struct reset_controller_dev *rcdev,
>  				  unsigned long id, bool assert)
>  {
>  	struct imx8mp_audiomix_reset *priv = to_imx8mp_audiomix_reset(rcdev);
> +	const struct imx8mp_reset_map *reset_map = priv->rinfo->map;
>  	unsigned int mask, offset, active_low, shift, val;
>
>  	mask = reset_map[id].mask;
> @@ -140,7 +152,8 @@ static int imx8mp_audiomix_reset_probe(struct auxiliary_device *adev,
>  		return -ENOMEM;
>
>  	priv->rcdev.owner     = THIS_MODULE;
> -	priv->rcdev.nr_resets = ARRAY_SIZE(reset_map);
> +	priv->rinfo           = (void *)id->driver_data;
> +	priv->rcdev.nr_resets = priv->rinfo->num_lines;
>  	priv->rcdev.ops       = &imx8mp_audiomix_reset_ops;
>  	priv->rcdev.of_node   = dev->parent->of_node;
>  	priv->rcdev.dev	      = dev;
> @@ -164,6 +177,7 @@ static int imx8mp_audiomix_reset_probe(struct auxiliary_device *adev,
>  static const struct auxiliary_device_id imx8mp_audiomix_reset_ids[] = {
>  	{
>  		.name = "clk_imx8mp_audiomix.reset",
> +		.driver_data = (kernel_ulong_t)&imx8mp_reset_info,
>  	},
>  	{ }
>  };
> --
> 2.43.0
>