Hi Michael, I love your patch! Perhaps something to improve: [auto build test WARNING on ljones-mfd/for-mfd-next] [also build test WARNING on shawnguo/for-next v5.8-rc5] [cannot apply to gpio/for-next hwmon/hwmon-next next-20200716] [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] url: https://github.com/0day-ci/linux/commits/Michael-Walle/Add-support-for-Kontron-sl28cpld/20200707-020034 base: https://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git for-mfd-next config: x86_64-allyesconfig (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project ed6b578040a85977026c93bf4188f996148f3218) 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 # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/gpio/gpio-sl28cpld.c:121:29: warning: implicit conversion from 'unsigned long' to 'unsigned int' changes value from 18446744073709551615 to 4294967295 [-Wconstant-conversion] config.reg_dir_out_base = GPIO_REGMAP_ADDR(base + GPIO_REG_DIR); ~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/gpio/regmap.h:12:44: note: expanded from macro 'GPIO_REGMAP_ADDR' #define GPIO_REGMAP_ADDR(addr) ((addr) ? : GPIO_REGMAP_ADDR_ZERO) ^~~~~~~~~~~~~~~~~~~~~ include/linux/gpio/regmap.h:11:32: note: expanded from macro 'GPIO_REGMAP_ADDR_ZERO' #define GPIO_REGMAP_ADDR_ZERO ((unsigned long)(-1)) ^~~~~~~~~~~~~~~~~~~ 1 warning generated. vim +121 drivers/gpio/gpio-sl28cpld.c 88 89 static int sl28cpld_gpio_probe(struct platform_device *pdev) 90 { 91 struct gpio_regmap_config config = {0}; 92 enum sl28cpld_gpio_type type; 93 struct regmap *regmap; 94 u32 base; 95 int ret; 96 97 if (!pdev->dev.parent) 98 return -ENODEV; 99 100 type = (uintptr_t)device_get_match_data(&pdev->dev); 101 if (!type) 102 return -ENODEV; 103 104 ret = device_property_read_u32(&pdev->dev, "reg", &base); 105 if (ret) 106 return -EINVAL; 107 108 regmap = dev_get_regmap(pdev->dev.parent, NULL); 109 if (!regmap) 110 return -ENODEV; 111 112 config.regmap = regmap; 113 config.parent = &pdev->dev; 114 config.ngpio = 8; 115 116 switch (type) { 117 case SL28CPLD_GPIO: 118 config.reg_dat_base = base + GPIO_REG_IN; 119 config.reg_set_base = base + GPIO_REG_OUT; 120 /* reg_dir_out_base might be zero */ > 121 config.reg_dir_out_base = GPIO_REGMAP_ADDR(base + GPIO_REG_DIR); 122 123 /* This type supports interrupts */ 124 ret = sl28cpld_gpio_irq_init(pdev, base, &config); 125 if (ret) 126 return ret; 127 break; 128 case SL28CPLD_GPO: 129 config.reg_set_base = base + GPO_REG_OUT; 130 break; 131 case SL28CPLD_GPI: 132 config.reg_dat_base = base + GPI_REG_IN; 133 break; 134 default: 135 dev_err(&pdev->dev, "unknown type %d\n", type); 136 return -ENODEV; 137 } 138 139 return PTR_ERR_OR_ZERO(devm_gpio_regmap_register(&pdev->dev, &config)); 140 } 141 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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