linux-kernel - Re: [PATCH v2 2/3] reset: add driver for imx8ulp SIM reset controller

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Message-ID: <e3f4190b-f641-4df7-8b86-98a8be40a852@kernel.org>
Date: Mon, 10 Jun 2024 11:07:05 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Laurentiu Mihalcea <laurentiumihalcea111@...il.com>,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
 Philipp Zabel <p.zabel@...gutronix.de>, Liu Ying <victor.liu@....com>,
 Sascha Hauer <s.hauer@...gutronix.de>
Cc: laurentiu.mihalcea@....com, devicetree@...r.kernel.org,
 imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/3] reset: add driver for imx8ulp SIM reset controller

On 09/06/2024 14:59, Laurentiu Mihalcea wrote:
> From: Laurentiu Mihalcea <laurentiu.mihalcea@....com>
> 
> Certain components can be reset via the SIM module.
> Add reset controller driver for the SIM module to
> allow drivers for said components to control the
> reset signal(s).
> 
> Signed-off-by: Liu Ying <victor.liu@....com>
> Signed-off-by: Laurentiu Mihalcea <laurentiu.mihalcea@....com>
> ---
>  drivers/reset/Kconfig                         |   7 ++
>  drivers/reset/Makefile                        |   1 +
>  drivers/reset/reset-imx8ulp-sim.c             | 103 ++++++++++++++++++
>  include/dt-bindings/reset/imx8ulp-sim-reset.h |  16 +++

That's a binding, not driver. Keep it *always* with binding.

>  4 files changed, 127 insertions(+)
>  create mode 100644 drivers/reset/reset-imx8ulp-sim.c
>  create mode 100644 include/dt-bindings/reset/imx8ulp-sim-reset.h
> 


> +static int imx8ulp_sim_reset_probe(struct platform_device *pdev)
> +{
> +	struct device *dev = &pdev->dev;
> +	struct imx8ulp_sim_reset *simr;
> +	int ret;
> +
> +	simr = devm_kzalloc(dev, sizeof(*simr), GFP_KERNEL);
> +	if (!simr)
> +		return -ENOMEM;
> +
> +	simr->regmap = syscon_node_to_regmap(dev->of_node);
> +	if (IS_ERR(simr->regmap)) {
> +		ret = PTR_ERR(simr->regmap);
> +		dev_err(dev, "failed to get regmap: %d\n", ret);
> +		return ret;

syntax is return dev_err_probe()

> +	}


> +
> +MODULE_AUTHOR("Liu Ying <victor.liu@....com>");
> +MODULE_DESCRIPTION("NXP i.MX8ULP System Integration Module Reset driver");
> +MODULE_LICENSE("GPL");
> diff --git a/include/dt-bindings/reset/imx8ulp-sim-reset.h b/include/dt-bindings/reset/imx8ulp-sim-reset.h
> new file mode 100644
> index 000000000000..9f8fb8680a5e
> --- /dev/null
> +++ b/include/dt-bindings/reset/imx8ulp-sim-reset.h
> @@ -0,0 +1,16 @@
> +/* SPDX-License-Identifier: GPL-2.0-only OR BSD-3-Clause */
> +
> +/*
> + * Copyright 2024 NXP
> + */
> +
> +#ifndef DT_BINDINGS_RESET_IMX8ULP_SIM_H
> +#define DT_BINDINGS_RESET_IMX8ULP_SIM_H
> +
> +#define IMX8ULP_SIM_RESET_MIPI_DSI_RST_DPI_N    0
> +#define IMX8ULP_SIM_RESET_MIPI_DSI_RST_ESC_N    1
> +#define IMX8ULP_SIM_RESET_MIPI_DSI_RST_BYTE_N   2
> +
> +#define IMX8ULP_SIM_RESET_NUM                   3

Drop, not suitable for bindings.

> +
> +#endif /* DT_BINDINGS_RESET_IMX8ULP_SIM_H */

Best regards,
Krzysztof