Hi Jingbao, kernel test robot noticed the following build warnings: [auto build test WARNING on 7afc0e7f681e6efd6b826f003fc14c17b5093643] url: https://github.com/intel-lab-lkp/linux/commits/Jingbao-Qiu/dt-bindings-pwm-sophgo-add-pwm-for-Sophgo-CV1800-series-SoC/20240207-141135 base: 7afc0e7f681e6efd6b826f003fc14c17b5093643 patch link: https://lore.kernel.org/r/20240207060913.672554-1-qiujingbao.dlmu%40gmail.com patch subject: [PATCH v1 2/2] pwm: sophgo: add pwm support for Sophgo CV1800 SoC config: hexagon-allyesconfig (https://download.01.org/0day-ci/archive/20240208/202402081005.iOYVJ6KI-lkp@xxxxxxxxx/config) compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project 7dd790db8b77c4a833c06632e903dc4f13877a64) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240208/202402081005.iOYVJ6KI-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/202402081005.iOYVJ6KI-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from drivers/pwm/pwm-cv1800.c:14: In file included from include/linux/regmap.h:20: In file included from include/linux/iopoll.h:14: In file included from include/linux/io.h:13: In file included from arch/hexagon/include/asm/io.h:337: include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 547 | val = __raw_readb(PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 560 | val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr)); | ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu' 37 | #define __le16_to_cpu(x) ((__force __u16)(__le16)(x)) | ^ In file included from drivers/pwm/pwm-cv1800.c:14: In file included from include/linux/regmap.h:20: In file included from include/linux/iopoll.h:14: In file included from include/linux/io.h:13: In file included from arch/hexagon/include/asm/io.h:337: include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 573 | val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); | ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu' 35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x)) | ^ In file included from drivers/pwm/pwm-cv1800.c:14: In file included from include/linux/regmap.h:20: In file included from include/linux/iopoll.h:14: In file included from include/linux/io.h:13: In file included from arch/hexagon/include/asm/io.h:337: include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 584 | __raw_writeb(value, PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 594 | __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 604 | __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); | ~~~~~~~~~~ ^ >> drivers/pwm/pwm-cv1800.c:131:3: warning: comparison of distinct pointer types ('typeof ((tem)) *' (aka 'unsigned int *') and 'uint64_t *' (aka 'unsigned long long *')) [-Wcompare-distinct-pointer-types] 131 | do_div(tem, rate); | ^~~~~~~~~~~~~~~~~ include/asm-generic/div64.h:222:28: note: expanded from macro 'do_div' 222 | (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \ | ~~~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~ drivers/pwm/pwm-cv1800.c:131:3: error: incompatible pointer types passing 'u32 *' (aka 'unsigned int *') to parameter of type 'uint64_t *' (aka 'unsigned long long *') [-Werror,-Wincompatible-pointer-types] 131 | do_div(tem, rate); | ^~~~~~~~~~~~~~~~~ include/asm-generic/div64.h:238:22: note: expanded from macro 'do_div' 238 | __rem = __div64_32(&(n), __base); \ | ^~~~ include/asm-generic/div64.h:213:38: note: passing argument to parameter 'dividend' here 213 | extern uint32_t __div64_32(uint64_t *dividend, uint32_t divisor); | ^ drivers/pwm/pwm-cv1800.c:135:3: warning: comparison of distinct pointer types ('typeof ((tem)) *' (aka 'unsigned int *') and 'uint64_t *' (aka 'unsigned long long *')) [-Wcompare-distinct-pointer-types] 135 | do_div(tem, hlperiod_val); | ^~~~~~~~~~~~~~~~~~~~~~~~~ include/asm-generic/div64.h:222:28: note: expanded from macro 'do_div' 222 | (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \ | ~~~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~ drivers/pwm/pwm-cv1800.c:135:3: error: incompatible pointer types passing 'u32 *' (aka 'unsigned int *') to parameter of type 'uint64_t *' (aka 'unsigned long long *') [-Werror,-Wincompatible-pointer-types] 135 | do_div(tem, hlperiod_val); | ^~~~~~~~~~~~~~~~~~~~~~~~~ include/asm-generic/div64.h:238:22: note: expanded from macro 'do_div' 238 | __rem = __div64_32(&(n), __base); \ | ^~~~ include/asm-generic/div64.h:213:38: note: passing argument to parameter 'dividend' here 213 | extern uint32_t __div64_32(uint64_t *dividend, uint32_t divisor); | ^ >> drivers/pwm/pwm-cv1800.c:131:3: warning: shift count >= width of type [-Wshift-count-overflow] 131 | do_div(tem, rate); | ^~~~~~~~~~~~~~~~~ include/asm-generic/div64.h:234:25: note: expanded from macro 'do_div' 234 | } else if (likely(((n) >> 32) == 0)) { \ | ^ ~~ include/linux/compiler.h:76:40: note: expanded from macro 'likely' 76 | # define likely(x) __builtin_expect(!!(x), 1) | ^ drivers/pwm/pwm-cv1800.c:135:3: warning: shift count >= width of type [-Wshift-count-overflow] 135 | do_div(tem, hlperiod_val); | ^~~~~~~~~~~~~~~~~~~~~~~~~ include/asm-generic/div64.h:234:25: note: expanded from macro 'do_div' 234 | } else if (likely(((n) >> 32) == 0)) { \ | ^ ~~ include/linux/compiler.h:76:40: note: expanded from macro 'likely' 76 | # define likely(x) __builtin_expect(!!(x), 1) | ^ 10 warnings and 2 errors generated. vim +131 drivers/pwm/pwm-cv1800.c 113 114 static int cv1800_pwm_get_state(struct pwm_chip *chip, struct pwm_device *pwm, 115 struct pwm_state *state) 116 { 117 struct cv1800_pwm *priv = to_cv1800_pwm_dev(chip); 118 u32 period_val, hlperiod_val, tem; 119 u64 rate; 120 u64 period_ns = 0; 121 u64 duty_ns = 0; 122 u32 enable = 0; 123 124 regmap_read(priv->map, PERIOD(pwm->hwpwm), &period_val); 125 regmap_read(priv->map, HLPERIOD(pwm->hwpwm), &hlperiod_val); 126 127 if (period_val != PERIOD_RESET || hlperiod_val != HLPERIOD_RESET) { 128 rate = (u64)clk_get_rate(priv->clk); 129 130 tem = NSEC_PER_SEC * period_val; > 131 do_div(tem, rate); 132 period_ns = tem; 133 134 tem = period_val * period_ns; 135 do_div(tem, hlperiod_val); 136 duty_ns = tem; 137 138 regmap_read(priv->map, PWMSTART, &enable); 139 enable >>= pwm->hwpwm; 140 } 141 142 state->period = period_ns; 143 state->duty_cycle = duty_ns; 144 state->enabled = enable; 145 146 return 0; 147 } 148 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
