linux-kernel - Re: [PATCH V2 1/3] reset: imx7: Support module build

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Date:   Mon, 20 Jul 2020 11:22:22 +0200
From:   Philipp Zabel <p.zabel@...gutronix.de>
To:     Anson Huang <Anson.Huang@....com>, catalin.marinas@....com,
        will@...nel.org, lorenzo.pieralisi@....com, robh@...nel.org,
        bhelgaas@...gle.com, shawnguo@...nel.org, s.hauer@...gutronix.de,
        kernel@...gutronix.de, festevam@...il.com,
        bjorn.andersson@...aro.org, leoyang.li@....com, vkoul@...nel.org,
        geert+renesas@...der.be, olof@...om.net, treding@...dia.com,
        gustavo.pimentel@...opsys.com, amurray@...goodpenguin.co.uk,
        vidyas@...dia.com, xiaowei.bao@....com, jonnyc@...zon.com,
        hayashi.kunihiko@...ionext.com, eswara.kota@...ux.intel.com,
        krzk@...nel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org
Cc:     Linux-imx@....com
Subject: Re: [PATCH V2 1/3] reset: imx7: Support module build

On Mon, 2020-06-29 at 23:05 +0800, Anson Huang wrote:
> Add module device table, author, description and license to support
> module build, and CONFIG_RESET_IMX7 is changed to default 'y' ONLY
> for i.MX7D, other platforms need to select it in defconfig.
> 
> Signed-off-by: Anson Huang <Anson.Huang@....com>
> ---
> Changes since V1:
> 	- make it default 'y' for SOC_IMX7D;
> 	- add module author, description;
> 	- use device_initcall instead of builtin_platform_driver() to support
> 	  module unload.
> ---
>  drivers/reset/Kconfig      |  5 +++--
>  drivers/reset/reset-imx7.c | 14 ++++++++++++--
>  2 files changed, 15 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig
> index d9efbfd..19f9773 100644
> --- a/drivers/reset/Kconfig
> +++ b/drivers/reset/Kconfig
> @@ -65,9 +65,10 @@ config RESET_HSDK
>  	  This enables the reset controller driver for HSDK board.
>  
>  config RESET_IMX7
> -	bool "i.MX7/8 Reset Driver" if COMPILE_TEST
> +	tristate "i.MX7/8 Reset Driver"
>  	depends on HAS_IOMEM
> -	default SOC_IMX7D || (ARM64 && ARCH_MXC)
> +	depends on SOC_IMX7D || (ARM64 && ARCH_MXC) || COMPILE_TEST
> +	default y if SOC_IMX7D
>  	select MFD_SYSCON
>  	help
>  	  This enables the reset controller driver for i.MX7 SoCs.
> diff --git a/drivers/reset/reset-imx7.c b/drivers/reset/reset-imx7.c
> index d170fe6..c710f789 100644
> --- a/drivers/reset/reset-imx7.c
> +++ b/drivers/reset/reset-imx7.c
> @@ -8,7 +8,7 @@
>   */
>  
>  #include <linux/mfd/syscon.h>
> -#include <linux/mod_devicetable.h>
> +#include <linux/module.h>
>  #include <linux/of_device.h>
>  #include <linux/platform_device.h>
>  #include <linux/reset-controller.h>
> @@ -386,6 +386,7 @@ static const struct of_device_id imx7_reset_dt_ids[] = {
>  	{ .compatible = "fsl,imx8mp-src", .data = &variant_imx8mp },
>  	{ /* sentinel */ },
>  };
> +MODULE_DEVICE_TABLE(of, imx7_reset_dt_ids);
>  
>  static struct platform_driver imx7_reset_driver = {
>  	.probe	= imx7_reset_probe,
> @@ -394,4 +395,13 @@ static struct platform_driver imx7_reset_driver = {
>  		.of_match_table	= imx7_reset_dt_ids,
>  	},
>  };
> -builtin_platform_driver(imx7_reset_driver);
> +
> +static int __init imx7_reset_init(void)
> +{
> +	return platform_driver_register(&imx7_reset_driver);
> +}
> +device_initcall(imx7_reset_init);

Shouldn't this use module_platform_driver instead?

regards
Philipp