linux-kernel - Re: [PATCH 4/4] i2c: digicolor: Fix module autoload

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Message-ID: <20161019050528.ahtibbag7n6gksic@tarshish>
Date:   Wed, 19 Oct 2016 08:05:28 +0300
From:   Baruch Siach <baruch@...s.co.il>
To:     Javier Martinez Canillas <javier@....samsung.com>
Cc:     linux-kernel@...r.kernel.org, Wolfram Sang <wsa@...-dreams.de>,
        linux-arm-kernel@...ts.infradead.org, linux-i2c@...r.kernel.org
Subject: Re: [PATCH 4/4] i2c: digicolor: Fix module autoload

Hi Javier Martinez Canillas,

On Tue, Oct 18, 2016 at 06:01:48PM -0300, Javier Martinez Canillas wrote:
> If the driver is built as a module, autoload won't work because the module
> alias information is not filled. So user-space can't match the registered
> device with the corresponding module.
> 
> Export the module alias information using the MODULE_DEVICE_TABLE() macro.
> 
> Before this patch:
> 
> $ modinfo drivers/i2c/busses/i2c-digicolor.ko | grep alias
> $
> 
> After this patch:
> 
> $ modinfo drivers/i2c/busses/i2c-digicolor.ko | grep alias
> alias:          of:N*T*Ccnxt,cx92755-i2cC*
> alias:          of:N*T*Ccnxt,cx92755-i2c
> 
> Signed-off-by: Javier Martinez Canillas <javier@....samsung.com>

Acked-by: Baruch Siach <baruch@...s.co.il>

Thanks,
baruch

>  drivers/i2c/busses/i2c-digicolor.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/i2c/busses/i2c-digicolor.c b/drivers/i2c/busses/i2c-digicolor.c
> index 9604024e0eb0..49f2084f7bb5 100644
> --- a/drivers/i2c/busses/i2c-digicolor.c
> +++ b/drivers/i2c/busses/i2c-digicolor.c
> @@ -368,6 +368,7 @@ static const struct of_device_id dc_i2c_match[] = {
>  	{ .compatible = "cnxt,cx92755-i2c" },
>  	{ },
>  };
> +MODULE_DEVICE_TABLE(of, dc_i2c_match);
>  
>  static struct platform_driver dc_i2c_driver = {
>  	.probe   = dc_i2c_probe,

-- 
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