[PATCH] net: stmmac: dwmac-imx: pause the TXC clock in fixed-link

[kernel test robot]

Hi Shenwei,

kernel test robot noticed the following build warnings:

[auto build test WARNING on shawnguo/for-next]
[also build test WARNING on net-next/main net/main linus/master v6.5-rc3 next-20230725]
[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/Shenwei-Wang/net-stmmac-dwmac-imx-pause-the-TXC-clock-in-fixed-link/20230726-035218
base:   https://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux.git for-next
patch link:    https://lore.kernel.org/r/20230725194931.1989102-1-shenwei.wang%40nxp.com
patch subject: [PATCH] net: stmmac: dwmac-imx: pause the TXC clock in fixed-link
config: alpha-allyesconfig (https://download.01.org/0day-ci/archive/20230726/202307260736.EE13gy3b-lkp@intel.com/config)
compiler: alpha-linux-gcc (GCC) 12.3.0
reproduce: (https://download.01.org/0day-ci/archive/20230726/202307260736.EE13gy3b-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/202307260736.EE13gy3b-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c: In function 'imx_dwmac_fix_speed_mx93':
>> drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c:240:38: warning: variable 'plat_dat' set but not used [-Wunused-but-set-variable]
     240 |         struct plat_stmmacenet_data *plat_dat;
         |                                      ^~~~~~~~


vim +/plat_dat +240 drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c

   237	
   238	static void imx_dwmac_fix_speed_mx93(void *priv, unsigned int speed)
   239	{
 > 240		struct plat_stmmacenet_data *plat_dat;
   241		struct imx_priv_data *dwmac = priv;
   242		int val, ctrl, old_ctrl;
   243	
   244		imx_dwmac_fix_speed(priv, speed);
   245	
   246		old_ctrl = readl(dwmac->base_addr + MAC_CTRL_REG);
   247		plat_dat = dwmac->plat_dat;
   248		ctrl = old_ctrl & ~CTRL_SPEED_MASK;
   249	
   250		/* by default ctrl will be SPEED_1000 */
   251		if (speed == SPEED_100)
   252			ctrl |= RMII_RESET_SPEED;
   253		if (speed == SPEED_10)
   254			ctrl |= TEN_BASET_RESET_SPEED;
   255	
   256		if (imx_dwmac_is_fixed_link(dwmac)) {
   257			writel(ctrl, dwmac->base_addr + MAC_CTRL_REG);
   258	
   259			/* Ensure the settings for CTRL are applied */
   260			wmb();
   261	
   262			val = MX93_GPR_ENET_QOS_INTF_SEL_RGMII;
   263			regmap_update_bits(dwmac->intf_regmap, dwmac->intf_reg_off,
   264					   MX93_GPR_ENET_QOS_INTF_MODE_MASK, val);
   265			usleep_range(50, 100);
   266			val = MX93_GPR_ENET_QOS_INTF_SEL_RGMII | MX93_GPR_ENET_QOS_CLK_GEN_EN;
   267			regmap_update_bits(dwmac->intf_regmap, dwmac->intf_reg_off,
   268					   MX93_GPR_ENET_QOS_INTF_MODE_MASK, val);
   269	
   270			writel(old_ctrl, dwmac->base_addr + MAC_CTRL_REG);
   271		}
   272	}
   273	

-- 
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