linux-kernel - Re: [PATCH v2 1/3] of: Move simple-framebuffer device handling from simplefb to of

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Date:   Tue, 7 Dec 2021 10:02:40 +0100
From:   Thomas Zimmermann <tzimmermann@...e.de>
To:     Hector Martin <marcan@...can.st>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Hans de Goede <hdegoede@...hat.com>
Cc:     Alyssa Rosenzweig <alyssa@...enzweig.io>,
        Javier Martinez Canillas <javier@...hile0.org>,
        Pekka Paalanen <ppaalanen@...il.com>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/3] of: Move simple-framebuffer device handling from
 simplefb to of

Hi

Am 07.12.21 um 08:29 schrieb Hector Martin:
> This code is required for both simplefb and simpledrm, so let's move it
> into the OF core instead of having it as an ad-hoc initcall in the
> drivers.
> 
> Signed-off-by: Hector Martin <marcan@...can.st>

Acked-by: Thomas Zimmermann <tzimmermann@...e.de>

This looks much better than before. Thank you.

> ---
>   drivers/of/platform.c          |  5 +++++
>   drivers/video/fbdev/simplefb.c | 21 +--------------------
>   2 files changed, 6 insertions(+), 20 deletions(-)
> 
> diff --git a/drivers/of/platform.c b/drivers/of/platform.c
> index b3faf89744aa..e097f40b03c0 100644
> --- a/drivers/of/platform.c
> +++ b/drivers/of/platform.c
> @@ -540,6 +540,11 @@ static int __init of_platform_default_populate_init(void)
>   		of_node_put(node);
>   	}
>   
> +	for_each_child_of_node(of_chosen, node) {
> +		if (of_device_is_compatible(node, "simple-framebuffer"))
> +			of_platform_device_create(node, NULL, NULL);
> +	}
> +
>   	/* Populate everything else. */
>   	of_platform_default_populate(NULL, NULL, NULL);
>   
> diff --git a/drivers/video/fbdev/simplefb.c b/drivers/video/fbdev/simplefb.c
> index b63074fd892e..57541887188b 100644
> --- a/drivers/video/fbdev/simplefb.c
> +++ b/drivers/video/fbdev/simplefb.c
> @@ -541,26 +541,7 @@ static struct platform_driver simplefb_driver = {
>   	.remove = simplefb_remove,
>   };
>   
> -static int __init simplefb_init(void)
> -{
> -	int ret;
> -	struct device_node *np;
> -
> -	ret = platform_driver_register(&simplefb_driver);
> -	if (ret)
> -		return ret;
> -
> -	if (IS_ENABLED(CONFIG_OF_ADDRESS) && of_chosen) {
> -		for_each_child_of_node(of_chosen, np) {
> -			if (of_device_is_compatible(np, "simple-framebuffer"))
> -				of_platform_device_create(np, NULL, NULL);
> -		}
> -	}
> -
> -	return 0;
> -}
> -
> -fs_initcall(simplefb_init);
> +module_platform_driver(simplefb_driver);
>   
>   MODULE_AUTHOR("Stephen Warren <swarren@...dotorg.org>");
>   MODULE_DESCRIPTION("Simple framebuffer driver");
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Ivo Totev

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