linux-kernel - Re: [PATCH 3/5] SPI: Add helper macro for spi

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Date:	Wed, 16 Nov 2011 10:12:54 -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 3/5] SPI: Add helper macro for spi_driver boilerplate

On Wed, Nov 16, 2011 at 2:13 AM, Lars-Peter Clausen <lars@...afoo.de> wrote:
> This patch introduces the module_spi_driver macro which is a convenience macro
> for SPI 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 SPI driver. By using this macro it is possible to eliminate a few lines of
> boilerplate code per SPI driver.
>
> Signed-off-by: Lars-Peter Clausen <lars@...afoo.de>

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

> ---
>  include/linux/spi/spi.h |   11 +++++++++++
>  1 files changed, 11 insertions(+), 0 deletions(-)
>
> diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
> index bb4f5fb..176fce9 100644
> --- a/include/linux/spi/spi.h
> +++ b/include/linux/spi/spi.h
> @@ -200,6 +200,17 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv)
>                driver_unregister(&sdrv->driver);
>  }
>
> +/**
> + * module_spi_driver() - Helper macro for registering a SPI driver
> + * @__spi_driver: spi_driver struct
> + *
> + * Helper macro for SPI 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_spi_driver(__spi_driver) \
> +       module_driver(__spi_driver, spi_register_driver, \
> +                       spi_unregister_driver)
>
>  /**
>  * struct spi_master - interface to SPI master controller
> --
> 1.7.7.1
>
>
>



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