[PATCH v1 01/17] pinctrl: equilibrium: Convert to use struct pingroup

[kernel test robot]

Hi Andy,

kernel test robot noticed the following build warnings:

[auto build test WARNING on linusw-pinctrl/devel]
[also build test WARNING on linusw-pinctrl/for-next geert-renesas-drivers/renesas-pinctrl pinctrl-samsung/for-next linus/master v6.7-rc2 next-20231122]
[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/Andy-Shevchenko/pinctrl-equilibrium-Convert-to-use-struct-pingroup/20231123-005932
base:   https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl.git devel
patch link:    https://lore.kernel.org/r/20231122164040.2262742-2-andriy.shevchenko%40linux.intel.com
patch subject: [PATCH v1 01/17] pinctrl: equilibrium: Convert to use struct pingroup
config: i386-randconfig-001-20231123 (https://download.01.org/0day-ci/archive/20231123/202311230820.MGDyVHJW-lkp@intel.com/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231123/202311230820.MGDyVHJW-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/202311230820.MGDyVHJW-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/pinctrl/pinctrl-equilibrium.c: In function 'eqbr_build_groups':
   drivers/pinctrl/pinctrl-equilibrium.c:750:17: error: assignment of read-only location '*(grp->pins + (sizetype)((unsigned int)j * 4))'
     750 |    grp->pins[j] = pin_id;
         |                 ^
   drivers/pinctrl/pinctrl-equilibrium.c:761:23: error: 'struct pingroup' has no member named 'num_pins'; did you mean 'npins'?
     761 |       grp->pins, grp->num_pins,
         |                       ^~~~~~~~
         |                       npins
>> drivers/pinctrl/pinctrl-equilibrium.c:761:10: warning: passing argument 3 of 'pinctrl_generic_add_group' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
     761 |       grp->pins, grp->num_pins,
         |       ~~~^~~~~~
   In file included from drivers/pinctrl/pinctrl-equilibrium.c:16:
   drivers/pinctrl/core.h:225:15: note: expected 'int *' but argument is of type 'const unsigned int *'
     225 |          int *gpins, int ngpins, void *data);
         |          ~~~~~^~~~~


vim +761 drivers/pinctrl/pinctrl-equilibrium.c

   702	
   703	static int eqbr_build_groups(struct eqbr_pinctrl_drv_data *drvdata)
   704	{
   705		struct device *dev = drvdata->dev;
   706		struct device_node *node = dev->of_node;
   707		unsigned int *pinmux, pin_id, pinmux_id;
   708		struct pingroup group, *grp = &group;
   709		struct device_node *np;
   710		struct property *prop;
   711		int j, err;
   712	
   713		for_each_child_of_node(node, np) {
   714			prop = of_find_property(np, "groups", NULL);
   715			if (!prop)
   716				continue;
   717	
   718			grp->npins = of_property_count_u32_elems(np, "pins");
   719			if (grp->npins < 0) {
   720				dev_err(dev, "No pins in the group: %s\n", prop->name);
   721				of_node_put(np);
   722				return -EINVAL;
   723			}
   724			grp->name = prop->value;
   725			grp->pins = devm_kcalloc(dev, grp->npins, sizeof(*grp->pins), GFP_KERNEL);
   726			if (!grp->pins) {
   727				of_node_put(np);
   728				return -ENOMEM;
   729			}
   730	
   731			pinmux = devm_kcalloc(dev, grp->npins, sizeof(*pinmux), GFP_KERNEL);
   732			if (!pinmux) {
   733				of_node_put(np);
   734				return -ENOMEM;
   735			}
   736	
   737			for (j = 0; j < grp->npins; j++) {
   738				if (of_property_read_u32_index(np, "pins", j, &pin_id)) {
   739					dev_err(dev, "Group %s: Read intel pins id failed\n",
   740						grp->name);
   741					of_node_put(np);
   742					return -EINVAL;
   743				}
   744				if (pin_id >= drvdata->pctl_desc.npins) {
   745					dev_err(dev, "Group %s: Invalid pin ID, idx: %d, pin %u\n",
   746						grp->name, j, pin_id);
   747					of_node_put(np);
   748					return -EINVAL;
   749				}
   750				grp->pins[j] = pin_id;
   751				if (of_property_read_u32_index(np, "pinmux", j, &pinmux_id)) {
   752					dev_err(dev, "Group %s: Read intel pinmux id failed\n",
   753						grp->name);
   754					of_node_put(np);
   755					return -EINVAL;
   756				}
   757				pinmux[j] = pinmux_id;
   758			}
   759	
   760			err = pinctrl_generic_add_group(drvdata->pctl_dev, grp->name,
 > 761							grp->pins, grp->num_pins,
   762							pinmux);
   763			if (err < 0) {
   764				dev_err(dev, "Failed to register group %s\n", grp->name);
   765				of_node_put(np);
   766				return err;
   767			}
   768			memset(&group, 0, sizeof(group));
   769			pinmux = NULL;
   770		}
   771	
   772		return 0;
   773	}
   774	

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