linux-kernel - Re: [RESEND PATCH v27 11/15] leds: lp55xx: Add multicolor framework support to lp55xx

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Date:   Wed, 17 Jun 2020 23:41:44 +0200
From:   Jacek Anaszewski <jacek.anaszewski@...il.com>
To:     Dan Murphy <dmurphy@...com>, kernel test robot <lkp@...el.com>,
        pavel@....cz, robh@...nel.org
Cc:     kbuild-all@...ts.01.org, devicetree@...r.kernel.org,
        linux-leds@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RESEND PATCH v27 11/15] leds: lp55xx: Add multicolor framework
 support to lp55xx

Dan,

On 6/17/20 9:22 PM, Dan Murphy wrote:
> Pavel/Jacek
> 
> On 6/17/20 11:28 AM, kernel test robot wrote:
>> Hi Dan,
>>
>> I love your patch! Yet something to improve:
>>
>> [auto build test ERROR on pavel-linux-leds/for-next]
>> [cannot apply to j.anaszewski-leds/for-next]
>> [if your patch is applied to the wrong git tree, please drop us a note 
>> to help
>> improve the system. BTW, we also suggest to use '--base' option to 
>> specify the
>> base tree in git format-patch, please see 
>> https://stackoverflow.com/a/37406982]
>>
>> url:    
>> https://github.com/0day-ci/linux/commits/Dan-Murphy/Multicolor-Framework-v27/20200616-042217 
>>
>> base:   
>> git://git.kernel.org/pub/scm/linux/kernel/git/pavel/linux-leds.git 
>> for-next
>> config: ia64-randconfig-r015-20200617 (attached as .config)
>> compiler: ia64-linux-gcc (GCC) 9.3.0
>> 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
>>          # save the attached .config to linux build tree
>>          COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 
>> make.cross ARCH=ia64
>>
>> If you fix the issue, kindly add following tag as appropriate
>> Reported-by: kernel test robot <lkp@...el.com>
>>
>> All errors (new ones prefixed by >>, old ones prefixed by <<):
>>
>> ia64-linux-ld: drivers/leds/leds-lp55xx-common.o: in function 
>> `lp55xx_set_mc_brightness':
>>>> drivers/leds/leds-lp55xx-common.c:146: undefined reference to 
>>>> `led_mc_calc_color_components'
>> ia64-linux-ld: drivers/leds/leds-lp55xx-common.o: in function 
>> `devm_led_classdev_multicolor_register':
>>>> include/linux/led-class-multicolor.h:74: undefined reference to 
>>>> `devm_led_classdev_multicolor_register_ext'
>> vim +146 drivers/leds/leds-lp55xx-common.c
>>
>>     138
>>     139    static int lp55xx_set_mc_brightness(struct led_classdev *cdev,
>>     140                        enum led_brightness brightness)
>>     141    {
>>     142        struct led_classdev_mc *mc_dev = lcdev_to_mccdev(cdev);
>>     143        struct lp55xx_led *led = mcled_cdev_to_led(mc_dev);
>>     144        struct lp55xx_device_config *cfg = led->chip->cfg;
>>     145
>>   > 146        led_mc_calc_color_components(&led->mc_cdev, brightness);
>>     147        return cfg->multicolor_brightness_fn(led);
>>     148
> 
> Well this was a mess to figure out.
> 
> The only fix I can figure out here is to remove the
> 
>      depends on LEDS_CLASS_MULTI_COLOR || !LEDS_CLASS_MULTI_COLOR
> 
> from each child device and add
> 
>      select LEDS_CLASS_MULTI_COLOR
> 
> to the LP55XX_COMMON
> 
> This way the Multi color framework will inherit the symbol that was set 
> by the COMMON flag which is inherited by majority from the child flags.

Did you try this?

--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -398,6 +398,7 @@ config LEDS_LP50XX
  config LEDS_LP55XX_COMMON
         tristate "Common Driver for TI/National 
LP5521/5523/55231/5562/8501"
         depends on LEDS_LP5521 || LEDS_LP5523 || LEDS_LP5562 || LEDS_LP8501
+       depends on LEDS_CLASS_MULTI_COLOR || !LEDS_CLASS_MULTI_COLOR
         depends on OF
         select FW_LOADER
         select FW_LOADER_USER_HELPER


-- 
Best regards,
Jacek Anaszewski