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Date:   Thu, 14 Feb 2019 06:08:10 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Bartosz Golaszewski <brgl@...ev.pl>
Cc:     kbuild-all@...org, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Jacek Anaszewski <jacek.anaszewski@...il.com>,
        Pavel Machek <pavel@....cz>, Lee Jones <lee.jones@...aro.org>,
        Sebastian Reichel <sre@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
        devicetree@...r.kernel.org, linux-input@...r.kernel.org,
        linux-leds@...r.kernel.org, linux-pm@...r.kernel.org,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: Re: [PATCH v3 09/11] leds: max77650: add LEDs support

Hi Bartosz,

I love your patch! Yet something to improve:

[auto build test ERROR on ljones-mfd/for-mfd-next]
[also build test ERROR on v5.0-rc4 next-20190212]
[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/Bartosz-Golaszewski/mfd-add-support-for-max77650-PMIC/20190203-031133
base:   https://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git for-mfd-next
config: x86_64-randconfig-s5-02140238 (attached as .config)
compiler: gcc-8 (Debian 8.2.0-20) 8.2.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   ld: drivers/leds/leds-max77650.o: in function `max77650_led_probe':
>> drivers/leds/leds-max77650.c:119: undefined reference to `devm_of_led_classdev_register'

vim +119 drivers/leds/leds-max77650.c

    62	
    63	static int max77650_led_probe(struct platform_device *pdev)
    64	{
    65		struct device_node *of_node, *child;
    66		struct max77650_led *leds, *led;
    67		struct device *parent;
    68		struct device *dev;
    69		struct regmap *map;
    70		const char *label;
    71		int rv, num_leds;
    72		u32 reg;
    73	
    74		dev = &pdev->dev;
    75		parent = dev->parent;
    76		of_node = dev->of_node;
    77	
    78		if (!of_node)
    79			return -ENODEV;
    80	
    81		leds = devm_kcalloc(dev, sizeof(*leds),
    82				    MAX77650_LED_NUM_LEDS, GFP_KERNEL);
    83		if (!leds)
    84			return -ENOMEM;
    85	
    86		map = dev_get_regmap(dev->parent, NULL);
    87		if (!map)
    88			return -ENODEV;
    89	
    90		num_leds = of_get_child_count(of_node);
    91		if (!num_leds || num_leds > MAX77650_LED_NUM_LEDS)
    92			return -ENODEV;
    93	
    94		for_each_child_of_node(of_node, child) {
    95			rv = of_property_read_u32(child, "reg", &reg);
    96			if (rv || reg >= MAX77650_LED_NUM_LEDS)
    97				return -EINVAL;
    98	
    99			led = &leds[reg];
   100			led->map = map;
   101			led->regA = MAX77650_LED_A_BASE + reg;
   102			led->regB = MAX77650_LED_B_BASE + reg;
   103			led->cdev.brightness_set_blocking = max77650_led_brightness_set;
   104			led->cdev.max_brightness = MAX77650_LED_MAX_BRIGHTNESS;
   105	
   106			label = of_get_property(child, "label", NULL);
   107			if (!label) {
   108				led->cdev.name = "max77650::";
   109			} else {
   110				led->cdev.name = devm_kasprintf(dev, GFP_KERNEL,
   111								"max77650:%s", label);
   112				if (!led->cdev.name)
   113					return -ENOMEM;
   114			}
   115	
   116			of_property_read_string(child, "linux,default-trigger",
   117						&led->cdev.default_trigger);
   118	
 > 119			rv = devm_of_led_classdev_register(dev, child, &led->cdev);
   120			if (rv)
   121				return rv;
   122	
   123			rv = regmap_write(map, led->regA, MAX77650_LED_A_DEFAULT);
   124			if (rv)
   125				return rv;
   126	
   127			rv = regmap_write(map, led->regB, MAX77650_LED_B_DEFAULT);
   128			if (rv)
   129				return rv;
   130		}
   131	
   132		return regmap_write(map,
   133				    MAX77650_REG_CNFG_LED_TOP,
   134				    MAX77650_LED_TOP_DEFAULT);
   135	}
   136	

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