linux-kernel - Re: [PATCH 4/4] Input: RMI4 - introduce rmi_module

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Date:	Tue, 27 Nov 2012 15:46:08 -0800
From:	Christopher Heiny <cheiny@...aptics.com>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
CC:	Linus Walleij <linus.walleij@...ricsson.com>,
	Linux Input <linux-input@...r.kernel.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Allie Xiong <axiong@...aptics.com>,
	Vivian Ly <vly@...aptics.com>,
	Daniel Rosenberg <daniel.rosenberg@...aptics.com>,
	Alexandra Chin <alexandra.chin@...synaptics.com>,
	Joerie de Gram <j.de.gram@...il.com>,
	Wolfram Sang <w.sang@...gutronix.de>,
	Mathieu Poirier <mathieu.poirier@...aro.org>
Subject: Re: [PATCH 4/4] Input: RMI4 - introduce rmi_module_driver() macro

On 11/27/2012 01:21 AM, Dmitry Torokhov wrote:
> This also allows us to cut down on the boilerplate code in the function
> handler modules.

I like this idea a lot.  We'll adopt it.

				Thanks!
					Chris

>
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
> ---
>   drivers/input/rmi4/rmi_f11.c | 13 +------------
>   include/linux/rmi.h          | 14 ++++++++++++++
>   2 files changed, 15 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/input/rmi4/rmi_f11.c b/drivers/input/rmi4/rmi_f11.c
> index dbb6060..8457ab4 100644
> --- a/drivers/input/rmi4/rmi_f11.c
> +++ b/drivers/input/rmi4/rmi_f11.c
> @@ -2756,18 +2756,7 @@ static struct rmi_function_handler rmi_f11_handler = {
>   #endif  /* defined(CONFIG_HAS_EARLYSUSPEND) */
>   };
>
> -static int __init rmi_f11_module_init(void)
> -{
> -	return rmi_register_function_handler(&rmi_f11_handler);
> -}
> -
> -static void __exit rmi_f11_module_exit(void)
> -{
> -	rmi_unregister_function_handler(&rmi_f11_handler);
> -}
> -
> -module_init(rmi_f11_module_init);
> -module_exit(rmi_f11_module_exit);
> +module_rmi_driver(rmi_f11_handler);
>
>   MODULE_AUTHOR("Christopher Heiny <cheiny@...aptics.com");
>   MODULE_DESCRIPTION("RMI F11 module");
> diff --git a/include/linux/rmi.h b/include/linux/rmi.h
> index 8a74066..daca41b 100644
> --- a/include/linux/rmi.h
> +++ b/include/linux/rmi.h
> @@ -600,4 +600,18 @@ int rmi_register_phys_device(struct rmi_phys_device *phys);
>   void rmi_unregister_phys_device(struct rmi_phys_device *phys);
>   int rmi_for_each_dev(void *data, int (*func)(struct device *dev, void *data));
>
> +/**
> + * module_serio_driver() - Helper macro for registering a serio driver
> + * @__serio_driver: serio_driver struct
> + *
> + * Helper macro for serio drivers which do not do anything special in
> + * module init/exit. This eliminates a lot of boilerplate. Each module
> + * may only use this macro once, and calling it replaces module_init()
> + * and module_exit().
> + */
> +#define module_rmi_driver(__rmi_driver)			\
> +	module_driver(__rmi_driver,			\
> +		      rmi_register_function_handler,	\
> +		      rmi_unregister_function_handler)
> +
>   #endif
>


-- 

Christopher Heiny
Senior Staff Firmware Engineer
Synaptics Incorporated
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