Re: [PATCH v2 2/4] docs: hwmon: (ltc2945): change type of val to ULL in ltc2945_val_to_reg()

[kernel test robot <lkp@intel.com>]

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Hi Alexandru,

I love your patch! Yet something to improve:

[auto build test ERROR on hwmon/hwmon-next]
[also build test ERROR on v5.10-rc3 next-20201112]
[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/Alexandru-Ardelean/hwmon-ltc2945-add-support-for-sense-resistor/20201111-171129
base:   https://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging.git hwmon-next
config: powerpc64-randconfig-r005-20201111 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 874b0a0b9db93f5d3350ffe6b5efda2d908415d0)
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 powerpc64 cross compiling tool for clang build
        # apt-get install binutils-powerpc64-linux-gnu
        # https://github.com/0day-ci/linux/commit/4e0e9315df2733ae5efe6095c5ab9b7675d07fb0
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Alexandru-Ardelean/hwmon-ltc2945-add-support-for-sense-resistor/20201111-171129
        git checkout 4e0e9315df2733ae5efe6095c5ab9b7675d07fb0
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64 

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 >>):

>> drivers/hwmon/ltc2945.c:256:26: error: incompatible pointer types passing 'unsigned long long *' to parameter of type 'unsigned long *' [-Werror,-Wincompatible-pointer-types]
           ret = kstrtoul(buf, 10, &val);
                                   ^~~~
   include/linux/kernel.h:351:90: note: passing argument to parameter 'res' here
   static inline int __must_check kstrtoul(const char *s, unsigned int base, unsigned long *res)
                                                                                            ^
   1 error generated.

vim +256 drivers/hwmon/ltc2945.c

6700ce035f8301 Guenter Roeck      2014-01-11  241  
5614e26d84a99a Guenter Roeck      2018-12-06  242  static ssize_t ltc2945_value_store(struct device *dev,
6700ce035f8301 Guenter Roeck      2014-01-11  243  				   struct device_attribute *da,
6700ce035f8301 Guenter Roeck      2014-01-11  244  				   const char *buf, size_t count)
6700ce035f8301 Guenter Roeck      2014-01-11  245  {
6700ce035f8301 Guenter Roeck      2014-01-11  246  	struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
c159257a60302f Alexandru Ardelean 2020-11-11  247  	struct ltc2945_state *st = dev_get_drvdata(dev);
c159257a60302f Alexandru Ardelean 2020-11-11  248  	struct regmap *regmap = st->regmap;
6700ce035f8301 Guenter Roeck      2014-01-11  249  	u8 reg = attr->index;
4e0e9315df2733 Alexandru Ardelean 2020-11-11  250  	unsigned long long val;
6700ce035f8301 Guenter Roeck      2014-01-11  251  	u8 regbuf[3];
6700ce035f8301 Guenter Roeck      2014-01-11  252  	int num_regs;
6700ce035f8301 Guenter Roeck      2014-01-11  253  	int regval;
6700ce035f8301 Guenter Roeck      2014-01-11  254  	int ret;
6700ce035f8301 Guenter Roeck      2014-01-11  255  
6700ce035f8301 Guenter Roeck      2014-01-11 @256  	ret = kstrtoul(buf, 10, &val);
6700ce035f8301 Guenter Roeck      2014-01-11  257  	if (ret)
6700ce035f8301 Guenter Roeck      2014-01-11  258  		return ret;
6700ce035f8301 Guenter Roeck      2014-01-11  259  
6700ce035f8301 Guenter Roeck      2014-01-11  260  	/* convert to register value, then clamp and write result */
6700ce035f8301 Guenter Roeck      2014-01-11  261  	regval = ltc2945_val_to_reg(dev, reg, val);
6700ce035f8301 Guenter Roeck      2014-01-11  262  	if (is_power_reg(reg)) {
6700ce035f8301 Guenter Roeck      2014-01-11  263  		regval = clamp_val(regval, 0, 0xffffff);
6700ce035f8301 Guenter Roeck      2014-01-11  264  		regbuf[0] = regval >> 16;
6700ce035f8301 Guenter Roeck      2014-01-11  265  		regbuf[1] = (regval >> 8) & 0xff;
6700ce035f8301 Guenter Roeck      2014-01-11  266  		regbuf[2] = regval;
6700ce035f8301 Guenter Roeck      2014-01-11  267  		num_regs = 3;
6700ce035f8301 Guenter Roeck      2014-01-11  268  	} else {
6700ce035f8301 Guenter Roeck      2014-01-11  269  		regval = clamp_val(regval, 0, 0xfff) << 4;
6700ce035f8301 Guenter Roeck      2014-01-11  270  		regbuf[0] = regval >> 8;
6700ce035f8301 Guenter Roeck      2014-01-11  271  		regbuf[1] = regval & 0xff;
6700ce035f8301 Guenter Roeck      2014-01-11  272  		num_regs = 2;
6700ce035f8301 Guenter Roeck      2014-01-11  273  	}
6700ce035f8301 Guenter Roeck      2014-01-11  274  	ret = regmap_bulk_write(regmap, reg, regbuf, num_regs);
6700ce035f8301 Guenter Roeck      2014-01-11  275  	return ret < 0 ? ret : count;
6700ce035f8301 Guenter Roeck      2014-01-11  276  }
6700ce035f8301 Guenter Roeck      2014-01-11  277  

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