[PATCH] i3c: ast2600: Generate T-bits to terminate IBI storm

[kernel test robot]

Hi Billy,

kernel test robot noticed the following build errors:

[auto build test ERROR on linus/master]
[also build test ERROR on v6.16-rc1 next-20250611]
[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/Billy-Tsai/i3c-ast2600-Generate-T-bits-to-terminate-IBI-storm/20250611-120300
base:   linus/master
patch link:    https://lore.kernel.org/r/20250611040203.487734-1-billy_tsai%40aspeedtech.com
patch subject: [PATCH] i3c: ast2600: Generate T-bits to terminate IBI storm
config: powerpc64-randconfig-r072-20250612 (https://download.01.org/0day-ci/archive/20250612/202506120357.1kFiVfmV-lkp@intel.com/config)
compiler: powerpc64-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250612/202506120357.1kFiVfmV-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 at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202506120357.1kFiVfmV-lkp@intel.com/

All error/warnings (new ones prefixed by >>):

   drivers/i3c/master/ast2600-i3c-master.c: In function 'ast2600_i3c_fsm_exit_serv_ibi':
>> drivers/i3c/master/ast2600-i3c-master.c:146:10: error: implicit declaration of function 'FIELD_GET' [-Werror=implicit-function-declaration]
     state = FIELD_GET(CM_TFR_STS, readl(dw->regs + PRESENT_STATE));
             ^~~~~~~~~
   In file included from include/linux/device.h:15,
                    from include/linux/platform_device.h:13,
                    from drivers/i3c/master/ast2600-i3c-master.c:11:
   drivers/i3c/master/ast2600-i3c-master.c: In function 'ast2600_i3c_gen_tbits_in':
>> drivers/i3c/master/ast2600-i3c-master.c:174:4: warning: format '%lx' expects argument of type 'long unsigned int', but argument 3 has type 'int' [-Wformat=]
       "Failed to exit the I3C fsm from %lx(MASTER_SERV_IBI): %d",
       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/dev_printk.h:110:16: note: in definition of macro 'dev_printk_index_wrap'
      _p_func(dev, fmt, ##__VA_ARGS__);   \
                   ^~~
   include/linux/dev_printk.h:154:49: note: in expansion of macro 'dev_fmt'
     dev_printk_index_wrap(_dev_err, KERN_ERR, dev, dev_fmt(fmt), ##__VA_ARGS__)
                                                    ^~~~~~~
   drivers/i3c/master/ast2600-i3c-master.c:173:3: note: in expansion of macro 'dev_err'
      dev_err(&dw->base.dev,
      ^~~~~~~
   cc1: some warnings being treated as errors


vim +/FIELD_GET +146 drivers/i3c/master/ast2600-i3c-master.c

   136	
   137	static bool ast2600_i3c_fsm_exit_serv_ibi(struct dw_i3c_master *dw)
   138	{
   139		u32 state;
   140	
   141		/*
   142		 * Clear the IBI queue to enable the hardware to generate SCL and
   143		 * begin detecting the T-bit low to stop reading IBI data.
   144		 */
   145		readl(dw->regs + IBI_QUEUE_STATUS);
 > 146		state = FIELD_GET(CM_TFR_STS, readl(dw->regs + PRESENT_STATE));
   147		if (state == CM_TFR_STS_MASTER_SERV_IBI)
   148			return false;
   149	
   150		return true;
   151	}
   152	
   153	static void ast2600_i3c_gen_tbits_in(struct dw_i3c_master *dw)
   154	{
   155		struct ast2600_i3c *i3c = to_ast2600_i3c(dw);
   156		bool is_idle;
   157		int ret;
   158	
   159		regmap_write_bits(i3c->global_regs, AST2600_I3CG_REG1(i3c->global_idx),
   160				  AST2600_I3CG_REG1_SDA_IN_SW_MODE_VAL,
   161				  AST2600_I3CG_REG1_SDA_IN_SW_MODE_VAL);
   162		regmap_write_bits(i3c->global_regs, AST2600_I3CG_REG1(i3c->global_idx),
   163				  AST2600_I3CG_REG1_SDA_IN_SW_MODE_EN,
   164				  AST2600_I3CG_REG1_SDA_IN_SW_MODE_EN);
   165	
   166		regmap_write_bits(i3c->global_regs, AST2600_I3CG_REG1(i3c->global_idx),
   167				  AST2600_I3CG_REG1_SDA_IN_SW_MODE_VAL, 0);
   168		ret = readx_poll_timeout_atomic(ast2600_i3c_fsm_exit_serv_ibi, dw,
   169						is_idle, is_idle, 0, 2000000);
   170		regmap_write_bits(i3c->global_regs, AST2600_I3CG_REG1(i3c->global_idx),
   171				  AST2600_I3CG_REG1_SDA_IN_SW_MODE_EN, 0);
   172		if (ret)
   173			dev_err(&dw->base.dev,
 > 174				"Failed to exit the I3C fsm from %lx(MASTER_SERV_IBI): %d",
   175				FIELD_GET(CM_TFR_STS, readl(dw->regs + PRESENT_STATE)),
   176				ret);
   177	}
   178	

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