Re: [PATCH v2 2/2] hwmon: ltc4282: add support for the LTC4282 chip

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

Hi Nuno,

kernel test robot noticed the following build warnings:

[auto build test WARNING on groeck-staging/hwmon-next]
[also build test WARNING on linus/master v6.7-rc5]
[cannot apply to next-20231214]
[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/Nuno-Sa-via-B4-Relay/hwmon-ltc4282-add-support-for-the-LTC4282-chip/20231124-231842
base:   https://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging.git hwmon-next
patch link:    https://lore.kernel.org/r/20231124-ltc4282-support-v2-2-952bf926f83c%40analog.com
patch subject: [PATCH v2 2/2] hwmon: ltc4282: add support for the LTC4282 chip
config: nios2-randconfig-r111-20231127 (https://download.01.org/0day-ci/archive/20231215/202312150021.gTKleTo4-lkp@intel.com/config)
compiler: nios2-linux-gcc (GCC) 13.2.0
reproduce: (https://download.01.org/0day-ci/archive/20231215/202312150021.gTKleTo4-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202312150021.gTKleTo4-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/hwmon/ltc4282.c:347:6: sparse: sparse: symbol 'ltc4282_round_rate' was not declared. Should it be static?
>> drivers/hwmon/ltc4282.c:356:15: sparse: sparse: symbol 'ltc4282_recalc_rate' was not declared. Should it be static?
>> drivers/hwmon/ltc4282.c:967:34: sparse: sparse: dubious: x & !y
   drivers/hwmon/ltc4282.c:1057:34: sparse: sparse: dubious: x & !y
   drivers/hwmon/ltc4282.c: note: in included file (through include/uapi/linux/swab.h, include/linux/swab.h, include/uapi/linux/byteorder/little_endian.h, ...):
   arch/nios2/include/uapi/asm/swab.h:25:24: sparse: sparse: too many arguments for function __builtin_custom_ini
   arch/nios2/include/uapi/asm/swab.h:25:24: sparse: sparse: too many arguments for function __builtin_custom_ini
   arch/nios2/include/uapi/asm/swab.h:31:24: sparse: sparse: too many arguments for function __builtin_custom_ini
   arch/nios2/include/uapi/asm/swab.h:31:24: sparse: sparse: too many arguments for function __builtin_custom_ini
   arch/nios2/include/uapi/asm/swab.h:25:24: sparse: sparse: too many arguments for function __builtin_custom_ini
   arch/nios2/include/uapi/asm/swab.h:25:24: sparse: sparse: too many arguments for function __builtin_custom_ini

vim +/ltc4282_round_rate +347 drivers/hwmon/ltc4282.c

   346	
 > 347	long ltc4282_round_rate(struct clk_hw *hw, unsigned long rate,
   348				unsigned long *parent_rate)
   349	{
   350		int idx = find_closest(rate, ltc4282_out_rates,
   351				       ARRAY_SIZE(ltc4282_out_rates));
   352	
   353		return ltc4282_out_rates[idx];
   354	}
   355	
 > 356	unsigned long ltc4282_recalc_rate(struct clk_hw *hw, unsigned long parent)
   357	{
   358		struct ltc4282_state *st = container_of(hw, struct ltc4282_state,
   359							clk_hw);
   360		u32 clkdiv;
   361		int ret;
   362	
   363		ret = regmap_read(st->map, LTC4282_CLK_DIV, &clkdiv);
   364		if (ret)
   365			return 0;
   366	
   367		clkdiv = FIELD_GET(LTC4282_CLKOUT_MASK, clkdiv);
   368		if (!clkdiv)
   369			return 0;
   370		if (clkdiv == LTC4282_CLKOUT_INT)
   371			return LTC4282_CLKOUT_SYSTEM;
   372	
   373		return LTC4282_CLKOUT_CNV;
   374	}
   375	

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