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SubjectRe: [PATCH linux v2 2/2] drivers: hwmon: hwmon driver for ASPEED AST2400/2500 PWM and Fan tach controller
Hi Jaghathiswari,

[auto build test WARNING on hwmon/hwmon-next]
[also build test WARNING on v4.10-rc5 next-20170125]
[cannot apply to linux/master]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Jaghathiswari-Rankappagounder-Natarajan/Documentation-dt-bindings-Document-bindings-for-ASPEED-AST2400-AST2500-PWM-and-Fan-tach-controller-device-driver/20170127-174933
base: https://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging.git hwmon-next
config: openrisc-allyesconfig (attached as .config)
compiler: or32-linux-gcc (GCC) 4.5.1-or32-1.0rc1
reproduce:
wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=openrisc

All warnings (new ones prefixed by >>):

drivers/hwmon/aspeed-pwm-tacho.c: In function 'aspeed_get_fan_tach_ch_rpm':
>> drivers/hwmon/aspeed-pwm-tacho.c:492:16: warning: unused variable 'rpm'

vim +/rpm +492 drivers/hwmon/aspeed-pwm-tacho.c

476 div_l = priv->type_pwm_clock_division_l[type];
477 if (div_l == 0)
478 div_l = 1;
479 else
480 div_l = div_l * 2;
481
482 tacho_unit = priv->type_fan_tach_unit[type];
483 tacho_div = priv->type_fan_tach_clock_division[type];
484
485 tacho_div = 0x4 << (tacho_div * 2);
486 return clk / (clk_unit * div_h * div_l * tacho_div * tacho_unit);
487 }
488
489 static u32 aspeed_get_fan_tach_ch_rpm(struct aspeed_pwm_tacho_data *priv,
490 u8 fan_tach_ch)
491 {
> 492 u32 raw_data, rpm, tach_div, clk_source, timeout = 0, sec, val;
493 u8 fan_tach_ch_source, type;
494
495 regmap_write(priv->regmap, ASPEED_PTCR_TRIGGER, 0);
496 regmap_write(priv->regmap, ASPEED_PTCR_TRIGGER, 0x1 << fan_tach_ch);
497
498 fan_tach_ch_source = priv->fan_tach_ch_source[fan_tach_ch];
499 type = priv->pwm_port_type[fan_tach_ch_source];
500

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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