From mboxrd@z Thu Jan 1 00:00:00 1970 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 Message-ID: <1560796840-18207-1-git-send-email-info@metux.net> Cc: linus.walleij@linaro.org, bgolaszewski@baylibre.com, broonie@kernel.org, linux-gpio@vger.kernel.org, linux-spi@vger.kernel.org To: linux-kernel@vger.kernel.org Return-path: Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-spi.vger.kernel.org From: Enrico Weigelt 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 --- 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