Hi Yixun,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on clk/clk-next]
[also build test ERROR on next-20181224]
[cannot apply to v4.20]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Jianxin-Pan/clk-meson-add-a-sub-EMMC-clock-controller-support/20181222-060947
base:   https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git clk-next
config: i386-randconfig-x079-12301332 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

>> ERROR: "clk_regmap_mux_ops" [drivers/clk/meson/mmc-clkc.ko] undefined!

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