Hi,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on net/master]

url:    https://github.com/0day-ci/linux/commits/min-li-xe-renesas-com/ptp-ptp_idt82p33-update-to-support-adjphase/20200808-000545
base:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git 8912fd6a61d7474ea9b43be93f136034d28868d5
config: i386-randconfig-s001-20200807 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.2-118-ge1578773-dirty
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=i386 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   ld: drivers/ptp/ptp_idt82p33.o: in function `idt82p33_adjwritephase':
>> drivers/ptp/ptp_idt82p33.c:695: undefined reference to `__divdi3'

vim +695 drivers/ptp/ptp_idt82p33.c

   676	
   677	static int idt82p33_adjwritephase(struct ptp_clock_info *ptp, s32 offsetNs)
   678	{
   679		struct idt82p33_channel *channel =
   680			container_of(ptp, struct idt82p33_channel, caps);
   681		struct idt82p33 *idt82p33 = channel->idt82p33;
   682		s64 offsetInFs;
   683		s64 offsetRegVal;
   684		u8 val[4] = {0};
   685		int err;
   686	
   687		offsetInFs = (s64)(-offsetNs) * 1000000;
   688	
   689		if (offsetInFs > WRITE_PHASE_OFFSET_LIMIT)
   690			offsetInFs = WRITE_PHASE_OFFSET_LIMIT;
   691		else if (offsetInFs < -WRITE_PHASE_OFFSET_LIMIT)
   692			offsetInFs = -WRITE_PHASE_OFFSET_LIMIT;
   693	
   694		/* Convert from phaseOffsetInFs to register value */
 > 695		offsetRegVal = ((offsetInFs * 1000) / IDT_T0DPLL_PHASE_RESOL);
   696	
   697		val[0] = offsetRegVal & 0xFF;
   698		val[1] = (offsetRegVal >> 8) & 0xFF;
   699		val[2] = (offsetRegVal >> 16) & 0xFF;
   700		val[3] = (offsetRegVal >> 24) & 0x1F;
   701		val[3] |= PH_OFFSET_EN;
   702	
   703		mutex_lock(&idt82p33->reg_lock);
   704	
   705		err = idt82p33_dpll_set_mode(channel, PLL_MODE_WPH);
   706		if (err) {
   707			dev_err(&idt82p33->client->dev,
   708				"Failed at line %d in func %s!\n",
   709				__LINE__,
   710				__func__);
   711			goto out;
   712		}
   713	
   714		err = idt82p33_write(idt82p33, channel->dpll_phase_cnfg, val,
   715				     sizeof(val));
   716	
   717	out:
   718		mutex_unlock(&idt82p33->reg_lock);
   719		return err;
   720	}
   721	

---
0-DAY CI Kernel Test Service, Intel Corporation
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