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 17:33:14 -0500
From:   Dan Murphy <dmurphy@...com>
To:     Jacek Anaszewski <jacek.anaszewski@...il.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

Jacek

On 6/17/20 4:41 PM, Jacek Anaszewski wrote:
> 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
>
>
Yes I did

That gave unmet dependencies.

WARNING: unmet direct dependencies detected for LEDS_LP55XX_COMMON
   Depends on [m]: NEW_LEDS [=y] && (LEDS_LP5521 [=n] || LEDS_LP5523 
[=m] || LEDS_LP5562 [=y] || LEDS_LP8501 [=y]) && (LEDS_CLASS_MULTI_COLOR 
[=m] || !LEDS_CLASS_MULTI_COLOR [=m]) && OF [=y]
   Selected by [y]:
   - LEDS_LP5562 [=y] && NEW_LEDS [=y] && LEDS_CLASS [=y] && I2C [=y]
   - LEDS_LP8501 [=y] && NEW_LEDS [=y] && LEDS_CLASS [=y] && I2C [=y]
   Selected by [m]:
   - LEDS_LP5523 [=m] && NEW_LEDS [=y] && LEDS_CLASS [=y] && I2C [=y] && 
(LEDS_CLASS_MULTI_COLOR [=m] || !LEDS_CLASS_MULTI_COLOR [=m])