On Tue, 30 Apr 2024 09:25:43 +0200, Baojun Xu wrote: > > Main source code for tas2781 hda driver for SPI. > > Signed-off-by: Baojun Xu <baojun.xu@xxxxxx> That's far little description than wished. You can copy the contents of your cover letter to here, for example, for more detailed information. Second, and most: this patch breaks again the build. You added the code calling functions that aren't defined yet (appearing in the patch 3). Also, some functions seem defined but not really used, e.g. tasdevice_spi_calbin_remove(), and some are not needed to be global functions. thanks, Takashi