Messages in this thread Patch in this message | | | From | "Enrico Weigelt, metux IT consult" <> | Subject | [PATCH 1/3] include: linux: spi: more helpers for declaring spi drivers | Date | Mon, 17 Jun 2019 20:40:38 +0200 |
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From: Enrico Weigelt <info@metux.net>
Add more helper macros for trivial driver init cases, similar to the already existing module_spi_driver()+friends - now for those which are initialized at other stages (eg. by subsys_initcall()).
This helps to further reduce driver init boilerplate.
Signed-off-by: Enrico Weigelt <info@metux.net> --- include/linux/spi/spi.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index 053abd2..f55ba34 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -296,6 +296,23 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv) module_driver(__spi_driver, spi_register_driver, \ spi_unregister_driver) +/* subsys_spi_driver() - Helper macro for drivers that don't 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 subsys_initcall() and module_exit() + */ +#define subsys_spi_driver(__spi_driver) \ +static int __init __spi_driver##_init(void) \ +{ \ + return spi_register_driver(&(__spi_driver)); \ +} \ +subsys_initcall(__spi_driver##_init); \ +static void __exit __spi_driver##_exit(void) \ +{ \ + spi_unregister_driver(&(__spi_driver)); \ +} \ +module_exit(__spi_driver##_exit); + /** * struct spi_controller - interface to SPI master or slave controller * @dev: device interface to this driver -- 1.9.1
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