linux-kernel - Re: [PATCH 6/7] rtc: m41t93: Add square wave clock provider support

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Message-ID: <202509041224.AOsBArcW-lkp@intel.com>
Date: Thu, 4 Sep 2025 12:42:21 +0800
From: kernel test robot <lkp@...el.com>
To: Akhilesh Patil <akhilesh@...iitb.ac.in>, alexandre.belloni@...tlin.com,
	krzk+dt@...nel.org, robh@...nel.org, conor+dt@...nel.org
Cc: oe-kbuild-all@...ts.linux.dev, skhan@...uxfoundation.org,
	linux-rtc@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, akhileshpatilvnit@...il.com
Subject: Re: [PATCH 6/7] rtc: m41t93: Add square wave clock provider support

Hi Akhilesh,

kernel test robot noticed the following build warnings:

[auto build test WARNING on abelloni/rtc-next]
[also build test WARNING on linus/master v6.17-rc4 next-20250903]
[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/Akhilesh-Patil/rtc-m41t93-add-device-tree-support/20250903-223155
base:   https://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux.git rtc-next
patch link:    https://lore.kernel.org/r/c53cdf7c2af95160e05cb4db343bb172a88ae7c9.1756908788.git.akhilesh%40ee.iitb.ac.in
patch subject: [PATCH 6/7] rtc: m41t93: Add square wave clock provider support
config: x86_64-buildonly-randconfig-001-20250904 (https://download.01.org/0day-ci/archive/20250904/202509041224.AOsBArcW-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.4.0-5) 12.4.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250904/202509041224.AOsBArcW-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202509041224.AOsBArcW-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/rtc/rtc-m41t93.c: In function 'm41t93_clk_sqw_unprepare':
>> drivers/rtc/rtc-m41t93.c:364:45: warning: conversion from 'long unsigned int' to 'unsigned int' changes value from '18446744073709551551' to '4294967231' [-Woverflow]
     364 |                            M41T93_BIT_SQWE, ~M41T93_BIT_SQWE);


vim +364 drivers/rtc/rtc-m41t93.c

   358	
   359	static void m41t93_clk_sqw_unprepare(struct clk_hw *hw)
   360	{
   361		struct m41t93_data *m41t93 = clk_sqw_to_m41t93_data(hw);
   362	
   363		regmap_update_bits(m41t93->regmap, M41T93_REG_AL1_MONTH,
 > 364				   M41T93_BIT_SQWE, ~M41T93_BIT_SQWE);
   365	}
   366	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki