[PATCH] phy: qualcomm: m31-eusb2: Add runtime pm ops

[kernel test robot]

Hi Prashanth,

kernel test robot noticed the following build warnings:

[auto build test WARNING on linus/master]
[also build test WARNING on v6.18-rc3 next-20251027]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Prashanth-K/phy-qualcomm-m31-eusb2-Add-runtime-pm-ops/20251027-142647
base:   linus/master
patch link:    https://lore.kernel.org/r/20251027062458.1411096-1-prashanth.k%40oss.qualcomm.com
patch subject: [PATCH] phy: qualcomm: m31-eusb2: Add runtime pm ops
config: sh-randconfig-002-20251028 (https://download.01.org/0day-ci/archive/20251028/202510280637.c18uAF98-lkp@intel.com/config)
compiler: sh4-linux-gcc (GCC) 13.4.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251028/202510280637.c18uAF98-lkp@intel.com/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 <lkp at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202510280637.c18uAF98-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/phy/qualcomm/phy-qcom-m31-eusb2.c:253:12: warning: 'm31eusb2_phy_runtime_resume' defined but not used [-Wunused-function]
     253 | static int m31eusb2_phy_runtime_resume(struct device *dev)
         |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/phy/qualcomm/phy-qcom-m31-eusb2.c:243:12: warning: 'm31eusb2_phy_runtime_suspend' defined but not used [-Wunused-function]
     243 | static int m31eusb2_phy_runtime_suspend(struct device *dev)
         |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/m31eusb2_phy_runtime_resume +253 drivers/phy/qualcomm/phy-qcom-m31-eusb2.c

   242	
 > 243	static int m31eusb2_phy_runtime_suspend(struct device *dev)
   244	{
   245		struct m31eusb2_phy *phy = dev_get_drvdata(dev);
   246	
   247		dev_dbg(dev, "Suspending M31 eUSB2 Phy\n");
   248		clk_disable_unprepare(phy->clk);
   249	
   250		return 0;
   251	}
   252	
 > 253	static int m31eusb2_phy_runtime_resume(struct device *dev)
   254	{
   255		struct m31eusb2_phy *phy = dev_get_drvdata(dev);
   256		int ret = 0;
   257	
   258		dev_dbg(dev, "Resuming M31 eUSB2 Phy\n");
   259		ret = clk_prepare_enable(phy->clk);
   260		if (ret)
   261			dev_err(dev, "failed to enable ref clock, %d\n", ret);
   262	
   263		return ret;
   264	}
   265	

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