Re: [PATCH] i2c: hisi: Add I2C bus recovery support

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

Hi Bowen,

kernel test robot noticed the following build errors:

[auto build test ERROR on andi-shyti/i2c/i2c-host]
[also build test ERROR on linus/master v7.2 next-20260824]
[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/Bowen-Yu/i2c-hisi-Add-I2C-bus-recovery-support/20260825-113125
base:   https://git.kernel.org/pub/scm/linux/kernel/git/andi.shyti/linux.git i2c/i2c-host
patch link:    https://lore.kernel.org/r/20260825033125.1893253-1-yubowen8%40huawei.com
patch subject: [PATCH] i2c: hisi: Add I2C bus recovery support
config: arm-randconfig-003-20260826 (https://download.01.org/0day-ci/archive/20260826/202608260816.YagBXzlX-lkp@intel.com/config)
compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project 771bdfdab2d66a4eb85b8ea7673cfa30152718b1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260826/202608260816.YagBXzlX-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/202608260816.YagBXzlX-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/i2c/busses/i2c-hisi.c:236:27: error: call to undeclared function 'acpi_has_method'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     236 |         if (ctlr->acpi_handle && acpi_has_method(ctlr->acpi_handle, "_RST")) {
         |                                  ^
   drivers/i2c/busses/i2c-hisi.c:236:27: note: did you mean 'acpi_has_watchdog'?
   include/linux/acpi.h:1528:20: note: 'acpi_has_watchdog' declared here
    1528 | static inline bool acpi_has_watchdog(void) { return false; }
         |                    ^
   1 error generated.


vim +/acpi_has_method +236 drivers/i2c/busses/i2c-hisi.c

   221	
   222	static void hisi_i2c_unprepare_recovery(struct i2c_adapter *adap)
   223	{
   224		struct hisi_i2c_controller *ctlr = i2c_get_adapdata(adap);
   225		u32 reg;
   226	
   227		reg = readl(ctlr->sctrl_addr);
   228		reg &= ~(HISI_I2C_CTRL_SCL_CFG_EN | HISI_I2C_CTRL_DAT_CFG_EN);
   229		writel(reg, ctlr->sctrl_addr);
   230	
   231		/*
   232		 * Invokes the specific ACPI method "_RST" for trigger a soft
   233		 * reset of I2C controller in order to help on I2C controller recover from
   234		 * the abnormal state after bus recovery process.
   235		 */
 > 236		if (ctlr->acpi_handle && acpi_has_method(ctlr->acpi_handle, "_RST")) {
   237			acpi_status status;
   238	
   239			status = acpi_evaluate_object(ctlr->acpi_handle, "_RST", NULL, NULL);
   240			if (ACPI_FAILURE(status))
   241				dev_err(ctlr->dev, "_RST method failed: %s\n",
   242					acpi_format_exception(status));
   243		}
   244	
   245		hisi_i2c_configure_bus(ctlr);
   246	}
   247	

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