linux-kernel - Re: [PATCH 2/5] I2C: Add helper macro for i2c

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Message-ID: <CACxGe6toOFjOdP7-oZ4O2J=g2U+Y+aWOUzHDoCaX6goAs6zKsQ@mail.gmail.com>
Date:	Wed, 16 Nov 2011 10:12:20 -0700
From:	Grant Likely <grant.likely@...retlab.ca>
To:	Lars-Peter Clausen <lars@...afoo.de>
Cc:	Greg Kroah-Hartman <gregkh@...e.de>,
	Jean Delvare <khali@...ux-fr.org>,
	Jonathan Cameron <jic23@...nel.org>,
	Michael Hennerich <Michael.Hennerich@...log.com>,
	linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-i2c@...r.kernel.org, spi-devel-general@...ts.sourceforge.net
Subject: Re: [PATCH 2/5] I2C: Add helper macro for i2c_driver boilerplate

On Wed, Nov 16, 2011 at 2:13 AM, Lars-Peter Clausen <lars@...afoo.de> wrote:
> This patch introduces the module_i2c_driver macro which is a convenience macro
> for I2C driver modules similar to module_platform_driver. It is intended to be
> used by drivers which init/exit section does nothing but register/unregister
> the I2C driver. By using this macro it is possible to eliminate a few lines of
> boilerplate code per I2C driver.
>
> Signed-off-by: Lars-Peter Clausen <lars@...afoo.de>

Acked-by: Grant Likely <grant.likely@...retlab.ca>

> ---
>  include/linux/i2c.h |   13 +++++++++++++
>  1 files changed, 13 insertions(+), 0 deletions(-)
>
> diff --git a/include/linux/i2c.h b/include/linux/i2c.h
> index a81bf6d..7e92854 100644
> --- a/include/linux/i2c.h
> +++ b/include/linux/i2c.h
> @@ -485,6 +485,19 @@ static inline int i2c_adapter_id(struct i2c_adapter *adap)
>  {
>        return adap->nr;
>  }
> +
> +/**
> + * module_i2c_driver() - Helper macro for registering a I2C driver
> + * @__i2c_driver: i2c_driver struct
> + *
> + * Helper macro for I2C 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_i2c_driver(__i2c_driver) \
> +       module_driver(__i2c_driver, i2c_add_driver, \
> +                       i2c_del_driver)
> +
>  #endif /* I2C */
>  #endif /* __KERNEL__ */
>
> --
> 1.7.7.1
>
>
>



-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.
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