Re: [PATCH v4 4/7] nvmem: add support for device and sysfs-based cell lookups

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

Hi Oleksij,

kernel test robot noticed the following build warnings:

[auto build test WARNING on sre-power-supply/for-next]
[also build test WARNING on broonie-regulator/for-next rafael-pm/thermal linus/master v6.14-rc5 next-20250307]
[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/Oleksij-Rempel/power-Extend-power_on_reason-h-for-upcoming-PSCRR-framework/20250306-174233
base:   https://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply.git for-next
patch link:    https://lore.kernel.org/r/20250306093900.2199442-5-o.rempel%40pengutronix.de
patch subject: [PATCH v4 4/7] nvmem: add support for device and sysfs-based cell lookups
config: hexagon-randconfig-002-20250308 (https://download.01.org/0day-ci/archive/20250309/202503090029.GNYIypVB-lkp@intel.com/config)
compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project e15545cad8297ec7555f26e5ae74a9f0511203e7)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250309/202503090029.GNYIypVB-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/202503090029.GNYIypVB-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/rtc/rtc-pm8xxx.c:10:
>> include/linux/nvmem-consumer.h:115:20: warning: no previous prototype for function 'nvmem_cell_get_by_sysfs_name' [-Wmissing-prototypes]
     115 | struct nvmem_cell *nvmem_cell_get_by_sysfs_name(struct nvmem_device *nvmem,
         |                    ^
   include/linux/nvmem-consumer.h:115:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     115 | struct nvmem_cell *nvmem_cell_get_by_sysfs_name(struct nvmem_device *nvmem,
         | ^
         | static 
>> include/linux/nvmem-consumer.h:197:22: warning: no previous prototype for function 'nvmem_device_get_by_name' [-Wmissing-prototypes]
     197 | struct nvmem_device *nvmem_device_get_by_name(const char *name)
         |                      ^
   include/linux/nvmem-consumer.h:197:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     197 | struct nvmem_device *nvmem_device_get_by_name(const char *name)
         | ^
         | static 
   2 warnings generated.


vim +/nvmem_cell_get_by_sysfs_name +115 include/linux/nvmem-consumer.h

   114	
 > 115	struct nvmem_cell *nvmem_cell_get_by_sysfs_name(struct nvmem_device *nvmem,
   116							const char *cell_name)
   117	{
   118		return ERR_PTR(-EOPNOTSUPP);
   119	}
   120	
   121	static inline void devm_nvmem_cell_put(struct device *dev,
   122					       struct nvmem_cell *cell)
   123	{
   124	
   125	}
   126	static inline void nvmem_cell_put(struct nvmem_cell *cell)
   127	{
   128	}
   129	
   130	static inline void *nvmem_cell_read(struct nvmem_cell *cell, size_t *len)
   131	{
   132		return ERR_PTR(-EOPNOTSUPP);
   133	}
   134	
   135	static inline int nvmem_cell_write(struct nvmem_cell *cell,
   136					   void *buf, size_t len)
   137	{
   138		return -EOPNOTSUPP;
   139	}
   140	
   141	static inline int nvmem_cell_get_size(struct nvmem_cell *cell, size_t *bytes,
   142					      size_t *bits)
   143	{
   144		return -EOPNOTSUPP;
   145	}
   146	
   147	static inline int nvmem_cell_read_u8(struct device *dev,
   148					     const char *cell_id, u8 *val)
   149	{
   150		return -EOPNOTSUPP;
   151	}
   152	
   153	static inline int nvmem_cell_read_u16(struct device *dev,
   154					      const char *cell_id, u16 *val)
   155	{
   156		return -EOPNOTSUPP;
   157	}
   158	
   159	static inline int nvmem_cell_read_u32(struct device *dev,
   160					      const char *cell_id, u32 *val)
   161	{
   162		return -EOPNOTSUPP;
   163	}
   164	
   165	static inline int nvmem_cell_read_u64(struct device *dev,
   166					      const char *cell_id, u64 *val)
   167	{
   168		return -EOPNOTSUPP;
   169	}
   170	
   171	static inline int nvmem_cell_read_variable_le_u32(struct device *dev,
   172							 const char *cell_id,
   173							 u32 *val)
   174	{
   175		return -EOPNOTSUPP;
   176	}
   177	
   178	static inline int nvmem_cell_read_variable_le_u64(struct device *dev,
   179							  const char *cell_id,
   180							  u64 *val)
   181	{
   182		return -EOPNOTSUPP;
   183	}
   184	
   185	static inline struct nvmem_device *nvmem_device_get(struct device *dev,
   186							    const char *name)
   187	{
   188		return ERR_PTR(-EOPNOTSUPP);
   189	}
   190	
   191	static inline struct nvmem_device *devm_nvmem_device_get(struct device *dev,
   192								 const char *name)
   193	{
   194		return ERR_PTR(-EOPNOTSUPP);
   195	}
   196	
 > 197	struct nvmem_device *nvmem_device_get_by_name(const char *name)
   198	{
   199		return ERR_PTR(-EOPNOTSUPP);
   200	}
   201	

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