[frank-w-bpi-r2-4.14:pr/207 2/2] drivers/phy/mediatek/phy-mtk-xfi-tphy.c:75:6: warning: no previous prototype for function 'mtk_xfi_tphy_valid_ctle'

tree:   https://github.com/frank-w/BPI-R2-4.14 pr/207
head:   a433dbf4c7c757ae352428dbd961d1034aa6856d
commit: dc5255ff11eef125710c5e5403a961b3219eb641 [2/2] phy: mtk-xfi: add mtk_xfi_tphy_valid_ctle for use in usxgmii driver
config: powerpc64-randconfig-002-20260802 (https://download.01.org/0day-ci/archive/20260802/[email protected]/config)
compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project bacfe2950f8218268fcc0a8765644ea0c15f0360)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260802/[email protected]/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <[email protected]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/

All warnings (new ones prefixed by >>):

>> drivers/phy/mediatek/phy-mtk-xfi-tphy.c:75:6: warning: no previous prototype for function 'mtk_xfi_tphy_valid_ctle' [-Wmissing-prototypes]
      75 | bool mtk_xfi_tphy_valid_ctle(struct phy *phy)
         |      ^
   drivers/phy/mediatek/phy-mtk-xfi-tphy.c:75:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
      75 | bool mtk_xfi_tphy_valid_ctle(struct phy *phy)
         | ^
         | static 
   1 warning generated.


vim +/mtk_xfi_tphy_valid_ctle +75 drivers/phy/mediatek/phy-mtk-xfi-tphy.c

    74	
  > 75	bool mtk_xfi_tphy_valid_ctle(struct phy *phy)
    76	{
    77		struct mtk_xfi_tphy *xfi_tphy = phy_get_drvdata(phy);
    78		unsigned int val, ctle;
    79	
    80		writel(0x00000404, xfi_tphy->base + 0x00);
    81		writel(0x00d600d5, xfi_tphy->base + 0x10);
    82	
    83		val = readl(xfi_tphy->base + 0xd0);
    84	
    85		ctle = FIELD_GET(GENMASK(12, 8), val);
    86		if (ctle > 10)
    87		       return false;
    88	
    89		return true;
    90	}
    91	

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