Re: [PATCH 3/8] soc: renesas: rzn1-sysc: Export function to set dmamux

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

Hi Miquel,

I love your patch! Perhaps something to improve:

[auto build test WARNING on geert-renesas-devel/next]
[also build test WARNING on geert-renesas-drivers/renesas-clk robh/for-next linus/master v5.17-rc4 next-20220217]
[cannot apply to vkoul-dmaengine/next]
[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/Miquel-Raynal/RZN1-DMA-support/20220220-182519
base:   https://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-devel.git next
config: arm-randconfig-r022-20220220 (https://download.01.org/0day-ci/archive/20220221/202202210355.JzDJ9Lyz-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project d271fc04d5b97b12e6b797c6067d3c96a8d7470e)
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 arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        # https://github.com/0day-ci/linux/commit/ed9b880ea7f2b23b42feeed7a6ed898cd09ae2f1
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Miquel-Raynal/RZN1-DMA-support/20220220-182519
        git checkout ed9b880ea7f2b23b42feeed7a6ed898cd09ae2f1
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash drivers/clk/renesas/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/clk/renesas/r9a06g032-clocks.c:320:5: warning: no previous prototype for function 'r9a06g032_syscon_set_dmamux' [-Wmissing-prototypes]
   int r9a06g032_syscon_set_dmamux(u32 mask, u32 val)
       ^
   drivers/clk/renesas/r9a06g032-clocks.c:320:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int r9a06g032_syscon_set_dmamux(u32 mask, u32 val)
   ^
   static 
   1 warning generated.


vim +/r9a06g032_syscon_set_dmamux +320 drivers/clk/renesas/r9a06g032-clocks.c

   317	
   318	/* Exported helper to access the DMAMUX register */
   319	static struct r9a06g032_priv *syscon_priv;
 > 320	int r9a06g032_syscon_set_dmamux(u32 mask, u32 val)
   321	{
   322		u32 dmamux;
   323	
   324		if (!syscon_priv)
   325			return -EPROBE_DEFER;
   326	
   327		spin_lock(&syscon_priv->lock);
   328	
   329		dmamux = readl(syscon_priv->reg + R9A06G032_SYSCON_DMAMUX);
   330		dmamux &= ~mask;
   331		dmamux |= val & mask;
   332		writel(dmamux, syscon_priv->reg + R9A06G032_SYSCON_DMAMUX);
   333	
   334		spin_unlock(&syscon_priv->lock);
   335	
   336		return 0;
   337	}
   338	

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