Without this select we get linker errors when linking
clk-mt6795-apmixedsys

arm-linux-gnueabi-ld: drivers/clk/mediatek/clk-mt6795-apmixedsys.o: in function `clk_mt6795_apmixed_remove':
clk-mt6795-apmixedsys.c:(.text+0x34): undefined reference to `mtk_clk_unregister_pllfhs'
arm-linux-gnueabi-ld: drivers/clk/mediatek/clk-mt6795-apmixedsys.o: in function `clk_mt6795_apmixed_probe':
clk-mt6795-apmixedsys.c:(.text+0x98): undefined reference to `fhctl_parse_dt'
arm-linux-gnueabi-ld: clk-mt6795-apmixedsys.c:(.text+0xb8): undefined reference to `mtk_clk_register_pllfhs'
arm-linux-gnueabi-ld: clk-mt6795-apmixedsys.c:(.text+0x1c4): undefined reference to `mtk_clk_unregister_pllfhs'

Fixes: f222a1baec5f ("clk: mediatek: mt6795: Add support for frequency hopping through FHCTL")
Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Cc: Chen-Yu Tsai <wenst@chromium.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
---
 drivers/clk/mediatek/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/clk/mediatek/Kconfig b/drivers/clk/mediatek/Kconfig
index 7a12aefb1d0b..c707c6fe45a3 100644
--- a/drivers/clk/mediatek/Kconfig
+++ b/drivers/clk/mediatek/Kconfig
@@ -270,6 +270,7 @@ config COMMON_CLK_MT6795
 	tristate "Clock driver for MediaTek MT6795"
 	depends on ARCH_MEDIATEK || COMPILE_TEST
 	select COMMON_CLK_MEDIATEK
+	select COMMON_CLK_MEDIATEK_FHCTL
 	default ARCH_MEDIATEK
 	help
 	  This driver supports MediaTek MT6795 basic clocks and clocks
-- 
https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git/
https://git.kernel.org/pub/scm/linux/kernel/git/sboyd/spmi.git

Quoting Stephen Boyd (2023-03-16 16:11:18)
> Without this select we get linker errors when linking
> clk-mt6795-apmixedsys
> 
> arm-linux-gnueabi-ld: drivers/clk/mediatek/clk-mt6795-apmixedsys.o: in function `clk_mt6795_apmixed_remove':
> clk-mt6795-apmixedsys.c:(.text+0x34): undefined reference to `mtk_clk_unregister_pllfhs'
> arm-linux-gnueabi-ld: drivers/clk/mediatek/clk-mt6795-apmixedsys.o: in function `clk_mt6795_apmixed_probe':
> clk-mt6795-apmixedsys.c:(.text+0x98): undefined reference to `fhctl_parse_dt'
> arm-linux-gnueabi-ld: clk-mt6795-apmixedsys.c:(.text+0xb8): undefined reference to `mtk_clk_register_pllfhs'
> arm-linux-gnueabi-ld: clk-mt6795-apmixedsys.c:(.text+0x1c4): undefined reference to `mtk_clk_unregister_pllfhs'
> 
> Fixes: f222a1baec5f ("clk: mediatek: mt6795: Add support for frequency hopping through FHCTL")
> Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> Cc: Chen-Yu Tsai <wenst@chromium.org>
> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
> ---

Applied to clk-next