Hi Jingbao, kernel test robot noticed the following build errors: [auto build test ERROR on abelloni/rtc-next] [also build test ERROR on robh/for-next linus/master v6.7-rc5 next-20231215] [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/Jingbao-Qiu/dt-bindings-rtc-sophgo-add-RTC-support-for-Sophgo-CV1800-series-SoC/20231217-191123 base: https://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux.git rtc-next patch link: https://lore.kernel.org/r/20231217110952.78784-3-qiujingbao.dlmu%40gmail.com patch subject: [PATCH v2 2/3] rtc: sophgo: add rtc support for Sophgo CV1800 SoC config: sparc-allmodconfig (https://download.01.org/0day-ci/archive/20231218/202312180655.uM6zOZlv-lkp@xxxxxxxxx/config) compiler: sparc64-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231218/202312180655.uM6zOZlv-lkp@xxxxxxxxx/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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202312180655.uM6zOZlv-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): drivers/rtc/rtc-cv1800.c: In function 'cv1800_rtc_alarm_irq_enable': >> drivers/rtc/rtc-cv1800.c:89:17: error: implicit declaration of function 'writel' [-Werror=implicit-function-declaration] 89 | writel(REG_ENABLE_FUN, info->base_data + ALARM_ENABLE); | ^~~~~~ drivers/rtc/rtc-cv1800.c: In function 'cv1800_rtc_set_alarm': >> drivers/rtc/rtc-cv1800.c:113:9: error: implicit declaration of function 'readl' [-Werror=implicit-function-declaration] 113 | readl(info->base_data + SEC_CNTR_VAL); | ^~~~~ cc1: some warnings being treated as errors vim +/writel +89 drivers/rtc/rtc-cv1800.c 83 84 static int cv1800_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) 85 { 86 struct cv1800_priv *info = dev_get_drvdata(dev); 87 88 if (enabled) > 89 writel(REG_ENABLE_FUN, info->base_data + ALARM_ENABLE); 90 else 91 writel(REG_DISABLE_FUN, info->base_data + ALARM_ENABLE); 92 93 return 0; 94 } 95 96 static int cv1800_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) 97 { 98 struct cv1800_priv *info = dev_get_drvdata(dev); 99 unsigned long alarm_time; 100 101 alarm_time = rtc_tm_to_time64(&alrm->time); 102 103 if (alarm_time > SEC_MAX_VAL) 104 return -EINVAL; 105 106 writel(REG_DISABLE_FUN, info->base_data + ALARM_ENABLE); 107 108 udelay(DEALY_TIME_PREPARE); 109 110 writel(alarm_time, info->base_data + ALARM_TIME); 111 writel(REG_ENABLE_FUN, info->base_data + ALARM_ENABLE); 112 > 113 readl(info->base_data + SEC_CNTR_VAL); 114 115 return 0; 116 } 117 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki