Re: [PATCH 1/2] gpio: fxl6408: Add optional reset gpio control

[kernel test robot <lkp@intel.com>]

Hi Jisheng,

kernel test robot noticed the following build errors:

[auto build test ERROR on brgl/gpio/for-next]
[also build test ERROR on linus/master v6.18-rc4 next-20251031]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Jisheng-Zhang/gpio-fxl6408-Add-optional-reset-gpio-control/20251102-182544
base:   https://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux.git gpio/for-next
patch link:    https://lore.kernel.org/r/20251102100515.9506-2-jszhang%40kernel.org
patch subject: [PATCH 1/2] gpio: fxl6408: Add optional reset gpio control
config: arm-randconfig-001-20251103 (https://download.01.org/0day-ci/archive/20251103/202511030655.OCHXbHnE-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project d2625a438020ad35330cda29c3def102c1687b1b)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251103/202511030655.OCHXbHnE-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202511030655.OCHXbHnE-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/gpio/gpio-fxl6408.c:118:15: error: call to undeclared function 'devm_gpiod_get_optional'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     118 |         reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
         |                      ^
   drivers/gpio/gpio-fxl6408.c:118:15: note: did you mean 'devm_regulator_get_optional'?
   include/linux/regulator/consumer.h:163:32: note: 'devm_regulator_get_optional' declared here
     163 | struct regulator *__must_check devm_regulator_get_optional(struct device *dev,
         |                                ^
>> drivers/gpio/gpio-fxl6408.c:118:53: error: use of undeclared identifier 'GPIOD_OUT_LOW'
     118 |         reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
         |                                                            ^~~~~~~~~~~~~
   2 errors generated.


vim +/devm_gpiod_get_optional +118 drivers/gpio/gpio-fxl6408.c

   103	
   104	static int fxl6408_probe(struct i2c_client *client)
   105	{
   106		struct device *dev = &client->dev;
   107		struct gpio_desc *reset_gpio;
   108		int ret;
   109		struct gpio_regmap_config gpio_config = {
   110			.parent = dev,
   111			.ngpio = FXL6408_NGPIO,
   112			.reg_dat_base = GPIO_REGMAP_ADDR(FXL6408_REG_INPUT_STATUS),
   113			.reg_set_base = GPIO_REGMAP_ADDR(FXL6408_REG_OUTPUT),
   114			.reg_dir_out_base = GPIO_REGMAP_ADDR(FXL6408_REG_IO_DIR),
   115			.ngpio_per_reg = FXL6408_NGPIO,
   116		};
   117	
 > 118		reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
   119		if (IS_ERR(reset_gpio))
   120			return dev_err_probe(dev, PTR_ERR(reset_gpio), "Failed to get reset gpio\n");
   121	
   122		gpio_config.regmap = devm_regmap_init_i2c(client, &regmap);
   123		if (IS_ERR(gpio_config.regmap))
   124			return dev_err_probe(dev, PTR_ERR(gpio_config.regmap),
   125					     "failed to allocate register map\n");
   126	
   127		ret = fxl6408_identify(dev, gpio_config.regmap);
   128		if (ret)
   129			return ret;
   130	
   131		/* Disable High-Z of outputs, so that our OUTPUT updates actually take effect. */
   132		ret = regmap_write(gpio_config.regmap, FXL6408_REG_OUTPUT_HIGH_Z, 0);
   133		if (ret)
   134			return dev_err_probe(dev, ret, "failed to write 'output high Z' register\n");
   135	
   136		return PTR_ERR_OR_ZERO(devm_gpio_regmap_register(dev, &gpio_config));
   137	}
   138	

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