[brgl:gpio/for-next 45/49] drivers/gpio/gpio-nomadik.c:403:27: warning: unused variable 'desc'

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux.git gpio/for-next
head:   3be2d43534aab7291b59c4e66526f911854aa3a7
commit: ddeb66d2cb10f03a43d97a0ff2c3869d1951c87d [45/49] gpio: nomadik: don't print out global GPIO numbers in debugfs callbacks
config: i386-buildonly-randconfig-001-20250903 (https://download.01.org/0day-ci/archive/20250903/202509032125.nXBcPuaf-lkp@intel.com/config)
compiler: gcc-13 (Debian 13.3.0-16) 13.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250903/202509032125.nXBcPuaf-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/202509032125.nXBcPuaf-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/gpio/gpio-nomadik.c: In function 'nmk_gpio_dbg_show_one':
>> drivers/gpio/gpio-nomadik.c:403:27: warning: unused variable 'desc' [-Wunused-variable]
     403 |         struct gpio_desc *desc;
         |                           ^~~~


vim +/desc +403 drivers/gpio/gpio-nomadik.c

   398	
   399	void nmk_gpio_dbg_show_one(struct seq_file *s, struct pinctrl_dev *pctldev,
   400				   struct gpio_chip *chip, unsigned int offset)
   401	{
   402		struct nmk_gpio_chip *nmk_chip = gpiochip_get_data(chip);
 > 403		struct gpio_desc *desc;
   404		int mode;
   405		bool is_out;
   406		bool data_out;
   407		bool pull;
   408		static const char * const modes[] = {
   409			[NMK_GPIO_ALT_GPIO]	= "gpio",
   410			[NMK_GPIO_ALT_A]	= "altA",
   411			[NMK_GPIO_ALT_B]	= "altB",
   412			[NMK_GPIO_ALT_C]	= "altC",
   413			[NMK_GPIO_ALT_C + 1]	= "altC1",
   414			[NMK_GPIO_ALT_C + 2]	= "altC2",
   415			[NMK_GPIO_ALT_C + 3]	= "altC3",
   416			[NMK_GPIO_ALT_C + 4]	= "altC4",
   417		};
   418	
   419		char *label = gpiochip_dup_line_label(chip, offset);
   420		if (IS_ERR(label))
   421			return;
   422	
   423		clk_enable(nmk_chip->clk);
   424		is_out = !!(readl(nmk_chip->addr + NMK_GPIO_DIR) & BIT(offset));
   425		pull = !(readl(nmk_chip->addr + NMK_GPIO_PDIS) & BIT(offset));
   426		data_out = !!(readl(nmk_chip->addr + NMK_GPIO_DAT) & BIT(offset));
   427		mode = nmk_gpio_get_mode(nmk_chip, offset);
   428	#ifdef CONFIG_PINCTRL_NOMADIK
   429		if (mode == NMK_GPIO_ALT_C && pctldev) {
   430			desc = gpio_device_get_desc(chip->gpiodev, offset);
   431			mode = nmk_prcm_gpiocr_get_mode(pctldev, desc_to_gpio(desc));
   432		}
   433	#endif
   434	
   435		if (is_out) {
   436			seq_printf(s, " gpio-%-3d (%-20.20s) out %s           %s",
   437				   offset, label ?: "(none)", str_hi_lo(data_out),
   438				   (mode < 0) ? "unknown" : modes[mode]);
   439		} else {
   440			int irq = chip->to_irq(chip, offset);
   441			const int pullidx = pull ? 1 : 0;
   442			int val;
   443			static const char * const pulls[] = {
   444				"none        ",
   445				"pull enabled",
   446			};
   447	
   448			seq_printf(s, " gpio-%-3d (%-20.20s) in  %s %s",
   449				   offset, label ?: "(none)", pulls[pullidx],
   450				   (mode < 0) ? "unknown" : modes[mode]);
   451	
   452			val = nmk_gpio_get_input(chip, offset);
   453			seq_printf(s, " VAL %d", val);
   454	
   455			/*
   456			 * This races with request_irq(), set_irq_type(),
   457			 * and set_irq_wake() ... but those are "rare".
   458			 */
   459			if (irq > 0 && irq_has_action(irq)) {
   460				char *trigger;
   461				bool wake;
   462	
   463				if (nmk_chip->edge_rising & BIT(offset))
   464					trigger = "edge-rising";
   465				else if (nmk_chip->edge_falling & BIT(offset))
   466					trigger = "edge-falling";
   467				else
   468					trigger = "edge-undefined";
   469	
   470				wake = !!(nmk_chip->real_wake & BIT(offset));
   471	
   472				seq_printf(s, " irq-%d %s%s",
   473					   irq, trigger, wake ? " wakeup" : "");
   474			}
   475		}
   476		clk_disable(nmk_chip->clk);
   477	}
   478	

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