Hi Vivek, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on robh/for-next] [also build test WARNING on linus/master v6.1-rc1 next-20221021] [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/Vivek-Yadav/dt-bindings-Document-the-SYSREG-specific-compatibles-found-on-FSD-SoC/20221021-204010 base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next patch link: https://lore.kernel.org/r/20221021095833.62406-7-vivek.2311%40samsung.com patch subject: [PATCH 6/7] can: m_can: Add ECC functionality for message RAM config: m68k-allyesconfig compiler: m68k-linux-gcc (GCC) 12.1.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/intel-lab-lkp/linux/commit/05f01ceda6f70e1942c5530e04637da412b914da git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Vivek-Yadav/dt-bindings-Document-the-SYSREG-specific-compatibles-found-on-FSD-SoC/20221021-204010 git checkout 05f01ceda6f70e1942c5530e04637da412b914da # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=m68k SHELL=/bin/bash drivers/net/can/m_can/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot All warnings (new ones prefixed by >>): >> drivers/net/can/m_can/m_can.c:1538:5: warning: no previous prototype for 'm_can_config_mram_ecc_check' [-Wmissing-prototypes] 1538 | int m_can_config_mram_ecc_check(struct m_can_classdev *cdev, int enable, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/m_can_config_mram_ecc_check +1538 drivers/net/can/m_can/m_can.c 1537 > 1538 int m_can_config_mram_ecc_check(struct m_can_classdev *cdev, int enable, 1539 struct device_node *np) 1540 { 1541 int val = 0; 1542 int offset = 0, ret = 0; 1543 int delay_count = MRAM_INIT_TIMEOUT; 1544 struct m_can_mraminit *mraminit = &cdev->mraminit_sys; 1545 1546 mraminit->syscon = syscon_regmap_lookup_by_phandle(np, 1547 "mram-ecc-cfg"); 1548 if (IS_ERR(mraminit->syscon)) { 1549 /* can fail with -EPROBE_DEFER */ 1550 ret = PTR_ERR(mraminit->syscon); 1551 return ret; 1552 } 1553 1554 if (of_property_read_u32_index(np, "mram-ecc-cfg", 1, 1555 &mraminit->reg)) { 1556 dev_err(cdev->dev, "couldn't get the mraminit reg. offset!\n"); 1557 return -ENODEV; 1558 } 1559 1560 val = ((MRAM_ECC_ENABLE_MASK | MRAM_CFG_VALID_MASK | 1561 MRAM_INIT_ENABLE_MASK) << offset); 1562 regmap_clear_bits(mraminit->syscon, mraminit->reg, val); 1563 1564 if (enable) { 1565 val = (MRAM_ECC_ENABLE_MASK | MRAM_INIT_ENABLE_MASK) << offset; 1566 regmap_set_bits(mraminit->syscon, mraminit->reg, val); 1567 } 1568 1569 /* after enable or disable valid flag need to be set*/ 1570 val = (MRAM_CFG_VALID_MASK << offset); 1571 regmap_set_bits(mraminit->syscon, mraminit->reg, val); 1572 1573 if (enable) { 1574 do { 1575 regmap_read(mraminit->syscon, mraminit->reg, &val); 1576 1577 if (val & (MRAM_INIT_DONE_MASK << offset)) 1578 return 0; 1579 1580 udelay(1); 1581 } while (delay_count--); 1582 1583 return -ENODEV; 1584 } 1585 1586 return 0; 1587 } 1588 -- 0-DAY CI Kernel Test Service https://01.org/lkp