> source code:
>
> MODULE_ALIAS("platform:sm501");
>
> static const struct of_device_id of_sm501_match_tbl[] = {
> { .compatible = "smi,sm501", },
> { /* end */ }
> };
> MODULE_DEVICE_TABLE(of, of_sm501_match_tbl);
>
> location: http://lxr.free-electrons.com/source/drivers/mfd/sm501.c#L1711
>
> Since there is the MODULE_DEVICE_TABLE(), why the author additionally
adds the MODULE_ALIAS()?
> What exactly is this MODULE_ALIAS() used for?Short answer: to re-enable auto loading of the module, Please refer subject line here: https://lab.nexedi.cn/kirr/linux/commit/4f46d6e7e5ffbce0ee1d1a80767fdf45e56cc863 Long answer: https://kerneltweaks.wordpress.com/2014/03/30/platform-device-and-platform-driver-linux/ References: Review the section kmod vs kerneld: http://lpic2.unix.nl/ch02s03.html What is MODULE_ALIAS: http://stackoverflow.com/questions/22778879/what-is-module-alias-in-linux-device-driver-code Review Alias section: https://wiki.debian.org/Modules#Automatic_loading_of_modules Review Identifying Device Driver Modules: http://free-electrons.com/doc/udev.pdf Useful to know: 1 - https://frankpzh.wordpress.com/2011/04/16/kmod-udev-and-modprobe/ 2 - https://www.quora.com/What-is-the-difference-between-platform-device-drivers-and-normal-device-drivers 3 - http://www.atmel.com/Images/doc32098.pdf Where it all began: http://www.linuxjournal.com/node/5604/print Hope this helps. Thanks - Aruna
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