On Mon, Dec 23, 2019 at 02:10:12AM +0000, jeff_chang(張世佳) wrote:

> --> When I check other driver at sound/soc/codecs/ folder, I just follow what others do.
> It seems in .h --> /* SPDX-Liencese-Identifier: GPL-2.0 */
>    In .c --> // SPDK-Liencese-Identifier: GPL-2.0

> Is it correct?

Yes, headers use C style comments and source files use C++ style.