linux-kernel - Re: [PATCH v4 03/27] gcc-sdm845: Add general purpose clock ops

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Message-ID: <202409141429.Wv6WJPEQ-lkp@intel.com>
Date: Sat, 14 Sep 2024 14:56:27 +0800
From: kernel test robot <lkp@...el.com>
To: Dzmitry Sankouski <dsankouski@...il.com>,
	Sebastian Reichel <sre@...nel.org>,
	Bjorn Andersson <andersson@...nel.org>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	Jessica Zhang <quic_jesszhan@...cinc.com>,
	Sam Ravnborg <sam@...nborg.org>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Lee Jones <lee@...nel.org>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Pavel Machek <pavel@....cz>, Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Uwe Kleine-König <ukleinek@...nel.org>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	Simona Vetter <simona@...ll.ch>,
	cros-qcom-dts-watchers@...omium.org,
	Konrad Dybcio <konradybcio@...nel.org>
Cc: oe-kbuild-all@...ts.linux.dev, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	linux-clk@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH v4 03/27] gcc-sdm845: Add general purpose clock ops

Hi Dzmitry,

kernel test robot noticed the following build errors:

[auto build test ERROR on 5acd9952f95fb4b7da6d09a3be39195a80845eb6]

url:    https://github.com/intel-lab-lkp/linux/commits/Dzmitry-Sankouski/power-supply-add-undervoltage-health-status-property/20240913-231027
base:   5acd9952f95fb4b7da6d09a3be39195a80845eb6
patch link:    https://lore.kernel.org/r/20240913-starqltechn_integration_upstream-v4-3-2d2efd5c5877%40gmail.com
patch subject: [PATCH v4 03/27] gcc-sdm845: Add general purpose clock ops
config: arm-randconfig-001-20240914 (https://download.01.org/0day-ci/archive/20240914/202409141429.Wv6WJPEQ-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 14.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240914/202409141429.Wv6WJPEQ-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/202409141429.Wv6WJPEQ-lkp@intel.com/

All errors (new ones prefixed by >>):

   arm-linux-gnueabi-ld: drivers/clk/qcom/clk-rcg2.o: in function `clk_rcg2_calc_mnd':
>> drivers/clk/qcom/clk-rcg2.c:437:(.text.clk_rcg2_calc_mnd+0x26): undefined reference to `__aeabi_uldivmod'
>> arm-linux-gnueabi-ld: drivers/clk/qcom/clk-rcg2.c:438:(.text.clk_rcg2_calc_mnd+0x38): undefined reference to `__aeabi_uldivmod'


vim +437 drivers/clk/qcom/clk-rcg2.c

   427	
   428	static void clk_rcg2_calc_mnd(u64 parent_rate, u64 rate, struct freq_tbl *f,
   429				unsigned int mnd_max, unsigned int hid_max)
   430	{
   431		int i = 2, count = 0;
   432		unsigned int pre_div_pure = 1;
   433		unsigned long rates_gcd, scaled_parent_rate;
   434		u16 m, n = 1, n_candidate = 1, n_max;
   435	
   436		rates_gcd = gcd(parent_rate, rate);
 > 437		m = rate / rates_gcd;
 > 438		scaled_parent_rate = parent_rate / rates_gcd;
   439		while (scaled_parent_rate > (mnd_max + m) * hid_max) {
   440			// we're exceeding divisor's range, trying lower scale.
   441			if (m > 1) {
   442				m--;
   443				scaled_parent_rate = mult_frac(scaled_parent_rate, m, (m + 1));
   444			} else {
   445				f->n = mnd_max + m;
   446				f->pre_div = hid_max;
   447				f->m = m;
   448			}
   449		}
   450	
   451		n_max = m + mnd_max;
   452	
   453		while (scaled_parent_rate > 1) {
   454			while (scaled_parent_rate % i == 0) {
   455				n_candidate *= i;
   456				if (n_candidate < n_max)
   457					n = n_candidate;
   458				else if (pre_div_pure * i < hid_max)
   459					pre_div_pure *= i;
   460				else
   461					clk_rcg2_split_div(i, &pre_div_pure, &n, hid_max);
   462	
   463				scaled_parent_rate /= i;
   464			}
   465			i++;
   466			count++;
   467		}
   468	
   469		f->m = m;
   470		f->n = n;
   471		f->pre_div = pre_div_pure > 1 ? pre_div_pure : 0;
   472	}
   473	

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