linux-kernel - Re: [PATCH-vs-togreg 1/2] iio: ina2xx-adc: update the CALIB. register when RShunt changes

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Message-ID: <201603112357.O4WbSsuq%fengguang.wu@intel.com>
Date:	Sat, 12 Mar 2016 00:01:34 +0800
From:	kbuild test robot <lkp@...el.com>
To:	Marc Titinger <mtitinger@...libre.com>
Cc:	kbuild-all@...org, jic23@...nel.org, knaack.h@....de,
	lars@...afoo.de, pmeerw@...erw.net, afd@...com,
	linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH-vs-togreg 1/2] iio: ina2xx-adc: update the CALIB.
 register when RShunt changes

Hi Marc,

[auto build test WARNING on iio/togreg]
[also build test WARNING on next-20160311]
[cannot apply to v4.5-rc7]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url:    https://github.com/0day-ci/linux/commits/Marc-Titinger/iio-ina2xx-adc-update-the-CALIB-register-when-RShunt-changes/20160311-225616
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg
config: i386-randconfig-s1-201610 (attached as .config)
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All warnings (new ones prefixed by >>):

   drivers/iio/adc/ina2xx-adc.c: In function 'ina2xx_init':
>> drivers/iio/adc/ina2xx-adc.c:629:6: warning: unused variable 'regval' [-Wunused-variable]
     u16 regval;
         ^

vim +/regval +629 drivers/iio/adc/ina2xx-adc.c

c43a102e Marc Titinger   2015-12-07  613  	.attrs = ina2xx_attributes,
c43a102e Marc Titinger   2015-12-07  614  };
c43a102e Marc Titinger   2015-12-07  615  
c43a102e Marc Titinger   2015-12-07  616  static const struct iio_info ina2xx_info = {
c43a102e Marc Titinger   2015-12-07  617  	.driver_module = THIS_MODULE,
7906dd52 Andrew F. Davis 2016-02-24  618  	.attrs = &ina2xx_attribute_group,
7906dd52 Andrew F. Davis 2016-02-24  619  	.read_raw = ina2xx_read_raw,
7906dd52 Andrew F. Davis 2016-02-24  620  	.write_raw = ina2xx_write_raw,
7906dd52 Andrew F. Davis 2016-02-24  621  	.debugfs_reg_access = ina2xx_debug_reg,
c43a102e Marc Titinger   2015-12-07  622  };
c43a102e Marc Titinger   2015-12-07  623  
76011646 Marc Titinger   2016-03-11  624  
76011646 Marc Titinger   2016-03-11  625  
c43a102e Marc Titinger   2015-12-07  626  /* Initialize the configuration and calibration registers. */
c43a102e Marc Titinger   2015-12-07  627  static int ina2xx_init(struct ina2xx_chip_info *chip, unsigned int config)
c43a102e Marc Titinger   2015-12-07  628  {
c43a102e Marc Titinger   2015-12-07 @629  	u16 regval;
7906dd52 Andrew F. Davis 2016-02-24  630  	int ret;
c43a102e Marc Titinger   2015-12-07  631  
7906dd52 Andrew F. Davis 2016-02-24  632  	ret = regmap_write(chip->regmap, INA2XX_CONFIG, config);
7906dd52 Andrew F. Davis 2016-02-24  633  	if (ret)
c43a102e Marc Titinger   2015-12-07  634  		return ret;
7906dd52 Andrew F. Davis 2016-02-24  635  
76011646 Marc Titinger   2016-03-11  636  	return ina2xx_set_calibration(chip);
c43a102e Marc Titinger   2015-12-07  637  }

:::::: The code at line 629 was first introduced by commit
:::::: c43a102e67db99c8bfe6e8a9280cec13ff53b789 iio: ina2xx: add support for TI INA2xx Power Monitors

:::::: TO: Marc Titinger <mtitinger@...libre.com>
:::::: CC: Jonathan Cameron <jic23@...nel.org>

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