Re: [PATCH 1/1] clk: imx: scu: fix build break when compiled as modules

[Shawn Guo <shawnguo@kernel.org>]

On Fri, Oct 30, 2020 at 11:37:33PM +0800, Dong Aisheng wrote:
> After commit e0d0d4d86c76 ("clk: imx8qxp: Support building i.MX8QXP clock
> driver as module"), clk-scu.c and clk-imx8qxp.c are complied in one module,
> thus there can be only one module_init() in those two files.
> Commit 77d8f3068c63 ("clk: imx: scu: add two cells binding support")
> introduced another module_init() in clk_scu.c which caused the errors
> below.
> 
> To fix the issue, we can remove the unnecessary builtin_platform_driver
> from clk_scu.c and directly register the driver in imx_clk_scu_init().
> 
>   CC [M]  drivers/clk/imx/clk-scu.o
> In file included from ../include/linux/of_device.h:6,
>                  from ../include/linux/of_platform.h:12,
>                  from ../drivers/clk/imx/clk-scu.c:11:
> ../drivers/clk/imx/clk-scu.c: In function ‘imx_clk_scu_init’:
> ../drivers/clk/imx/clk-scu.c:176:35: error: ‘imx_clk_scu_driver’ undeclared (first use in this function); did you mean ‘imx_clk_scu_init’?
>   176 |  return platform_driver_register(&imx_clk_scu_driver);
>       |                                   ^~~~~~~~~~~~~~~~~~
> ../include/linux/platform_device.h:218:29: note: in definition of macro ‘platform_driver_register’
>   218 |  __platform_driver_register(drv, THIS_MODULE)
>       |                             ^~~
> ../drivers/clk/imx/clk-scu.c:176:35: note: each undeclared identifier is reported only once for each function it appears in
>   176 |  return platform_driver_register(&imx_clk_scu_driver);
>       |                                   ^~~~~~~~~~~~~~~~~~
> ../include/linux/platform_device.h:218:29: note: in definition of macro ‘platform_driver_register’
>   218 |  __platform_driver_register(drv, THIS_MODULE)
>       |                             ^~~
> ../drivers/clk/imx/clk-scu.c:177:1: error: control reaches end of non-void function [-Werror=return-type]
>   177 | }
>       | ^
> At top level:
> ../drivers/clk/imx/clk-scu.c:470:31: warning: ‘imx_clk_scu_driver’ defined but not used [-Wunused-variable]
>   470 | static struct platform_driver imx_clk_scu_driver = {
> 
> Reported-by: kernel test robot <lkp@intel.com>
> Fixes: 77d8f3068c63 ("clk: imx: scu: add two cells binding support")
> Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>

Applied, thanks.