phy: phy-rockchip-samsung-hdptx: Select CONFIG_RATIONAL

Ensure CONFIG_RATIONAL is selected in order to fix the following link
error with some kernel configurations:

drivers/phy/rockchip/phy-rockchip-samsung-hdptx.o: in function `rk_hdptx_ropll_tmds_cmn_config':
phy-rockchip-samsung-hdptx.c:(.text+0x950): undefined reference to `rational_best_approximation'

Fixes: 553be2830c5f ("phy: rockchip: Add Samsung HDMI/eDP Combo PHY driver")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202404090540.2l1TEkDF-lkp@intel.com/
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/r/20240408222926.32708-1-cristian.ciocaltea@collabora.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/phy/rockchip/Kconfig b/drivers/phy/rockchip/Kconfig
index a34f67bb7e61ad7b23cfc2d510054bb4348b8a36..b60a4b60451e5c1cda026c1565e87e5c5c7f86fe 100644 (file)
--- a/drivers/phy/rockchip/Kconfig
+++ b/drivers/phy/rockchip/Kconfig
@@ -87,6 +87,7 @@ config PHY_ROCKCHIP_SAMSUNG_HDPTX
        tristate "Rockchip Samsung HDMI/eDP Combo PHY driver"
        depends on (ARCH_ROCKCHIP || COMPILE_TEST) && OF
        select GENERIC_PHY
+       select RATIONAL
        help
          Enable this to support the Rockchip HDMI/eDP Combo PHY
          with Samsung IP block.