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Date:   Wed, 14 Oct 2020 22:16:16 +0800
From:   kernel test robot <lkp@...el.com>
To:     Shihlun Lin <shihlun.lin@...antech.com.tw>,
        Lee Jones <lee.jones@...aro.org>, linux-kernel@...r.kernel.org,
        Campion Kang <campion.kang@...antech.com.tw>,
        AceLan Kao <chia-lin.kao@...onical.com>
Cc:     kbuild-all@...ts.01.org
Subject: Re: [PATCH 1/3] mfd: ahc1ec0: Add support for Advantech embedded
 controller

Hi Shihlun,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on linux/master v5.9]
[cannot apply to lee-mfd/for-mfd-next next-20201013]
[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]

url:    https://github.com/0day-ci/linux/commits/Shihlun-Lin/mfd-ahc1ec0-Add-support-for-Advantech-embedded-controller/20201014-164627
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git b5fc7a89e58bcc059a3d5e4db79c481fb437de59
config: riscv-allyesconfig (attached as .config)
compiler: riscv64-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/f939b81446bccbb73682a795ea5422386d6b15bb
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Shihlun-Lin/mfd-ahc1ec0-Add-support-for-Advantech-embedded-controller/20201014-164627
        git checkout f939b81446bccbb73682a795ea5422386d6b15bb
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=riscv 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

   drivers/mfd/ahc1ec0.c:71:5: warning: no previous prototype for 'wait_ibf' [-Wmissing-prototypes]
      71 | int wait_ibf(void)
         |     ^~~~~~~~
   drivers/mfd/ahc1ec0.c:86:5: warning: no previous prototype for 'wait_obf' [-Wmissing-prototypes]
      86 | int wait_obf(void)
         |     ^~~~~~~~
   drivers/mfd/ahc1ec0.c:101:5: warning: no previous prototype for 'read_hw_ram' [-Wmissing-prototypes]
     101 | int read_hw_ram(uchar addr, uchar *data)
         |     ^~~~~~~~~~~
   drivers/mfd/ahc1ec0.c:182:5: warning: no previous prototype for 'wait_smbus_protocol_finish' [-Wmissing-prototypes]
     182 | int wait_smbus_protocol_finish(void)
         |     ^~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/mfd/ahc1ec0.c:203:5: warning: no previous prototype for 'adv_get_dynamic_tab' [-Wmissing-prototypes]
     203 | int adv_get_dynamic_tab(struct adv_ec_platform_data *pdata)
         |     ^~~~~~~~~~~~~~~~~~~
   drivers/mfd/ahc1ec0.c:409:5: warning: no previous prototype for 'write_acpi_value' [-Wmissing-prototypes]
     409 | int write_acpi_value(uchar addr, uchar value)
         |     ^~~~~~~~~~~~~~~~
   drivers/mfd/ahc1ec0.c:442:5: warning: no previous prototype for 'read_gpio_status' [-Wmissing-prototypes]
     442 | int read_gpio_status(uchar PinNumber, uchar *pvalue)
         |     ^~~~~~~~~~~~~~~~
   drivers/mfd/ahc1ec0.c:493:5: warning: no previous prototype for 'write_gpio_status' [-Wmissing-prototypes]
     493 | int write_gpio_status(uchar PinNumber, uchar value)
         |     ^~~~~~~~~~~~~~~~~
   drivers/mfd/ahc1ec0.c:538:5: warning: no previous prototype for 'read_gpio_dir' [-Wmissing-prototypes]
     538 | int read_gpio_dir(uchar PinNumber, uchar *pvalue)
         |     ^~~~~~~~~~~~~
   drivers/mfd/ahc1ec0.c:585:5: warning: no previous prototype for 'write_gpio_dir' [-Wmissing-prototypes]
     585 | int write_gpio_dir(uchar PinNumber, uchar value)
         |     ^~~~~~~~~~~~~~
   drivers/mfd/ahc1ec0.c:631:5: warning: no previous prototype for 'write_hw_extend_ram' [-Wmissing-prototypes]
     631 | int write_hw_extend_ram(uchar addr, uchar data)
         |     ^~~~~~~~~~~~~~~~~~~
   drivers/mfd/ahc1ec0.c:866:5: warning: no previous prototype for 'smbus_write_byte' [-Wmissing-prototypes]
     866 | int smbus_write_byte(struct EC_SMBUS_WRITE_BYTE *ptr_ec_smbus_write_byte)
         |     ^~~~~~~~~~~~~~~~
   drivers/mfd/ahc1ec0.c:946:5: warning: no previous prototype for 'read_onekey_status' [-Wmissing-prototypes]
     946 | int read_onekey_status(uchar addr, uchar *pdata)
         |     ^~~~~~~~~~~~~~~~~~
   drivers/mfd/ahc1ec0.c:990:5: warning: no previous prototype for 'write_onekey_status' [-Wmissing-prototypes]
     990 | int write_onekey_status(uchar addr)
         |     ^~~~~~~~~~~~~~~~~~~
   drivers/mfd/ahc1ec0.c:1024:5: warning: no previous prototype for 'ec_oem_get_status' [-Wmissing-prototypes]
    1024 | int ec_oem_get_status(uchar addr, uchar *pdata)
         |     ^~~~~~~~~~~~~~~~~
   drivers/mfd/ahc1ec0.c:1076:5: warning: no previous prototype for 'ec_oem_set_status' [-Wmissing-prototypes]
    1076 | int ec_oem_set_status(uchar addr, uchar pdata)
         |     ^~~~~~~~~~~~~~~~~
   drivers/mfd/ahc1ec0.c: In function 'adv_ec_get_productname':
   drivers/mfd/ahc1ec0.c:1167:13: error: implicit declaration of function 'ioremap_cache'; did you mean 'ioremap_uc'? [-Werror=implicit-function-declaration]
    1167 |     (char *)ioremap_cache(((unsigned int *)&uc_ptaddr[index+0x18])[0],
         |             ^~~~~~~~~~~~~
         |             ioremap_uc
>> drivers/mfd/ahc1ec0.c:1167:5: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
    1167 |     (char *)ioremap_cache(((unsigned int *)&uc_ptaddr[index+0x18])[0],
         |     ^
   At top level:
   drivers/mfd/ahc1ec0.c:1244:30: warning: 'adv_ec_util_cells' defined but not used [-Wunused-const-variable=]
    1244 | static const struct mfd_cell adv_ec_util_cells[] = {
         |                              ^~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +1167 drivers/mfd/ahc1ec0.c

  1124	
  1125	static int adv_ec_get_productname(char *product)
  1126	{
  1127		static unsigned char *uc_ptaddr;
  1128		static unsigned char *uc_epsaddr;
  1129		int index = 0, eps_table;
  1130		int i = 0;
  1131		int length = 0;
  1132		int type0_str = 0;
  1133		int type1_str = 0;
  1134		int is_advantech = 0;
  1135	
  1136		uc_ptaddr = ioremap(AMI_UEFI_ADVANTECH_BOARD_NAME_ADDRESS,
  1137				AMI_UEFI_ADVANTECH_BOARD_NAME_LENGTH);
  1138		if (!uc_ptaddr) {
  1139			pr_err("Error: ioremap_nocache()");
  1140			return -ENXIO;
  1141		}
  1142	
  1143		/* Try to Read the product name from UEFI BIOS(DMI) EPS table */
  1144		for (index = 0; index < AMI_UEFI_ADVANTECH_BOARD_NAME_LENGTH; index++) {
  1145			if (uc_ptaddr[index] == '_'
  1146					&& uc_ptaddr[index+0x1] == 'S'
  1147					&& uc_ptaddr[index+0x2] == 'M'
  1148					&& uc_ptaddr[index+0x3] == '_'
  1149					&& uc_ptaddr[index+0x10] == '_'
  1150					&& uc_ptaddr[index+0x11] == 'D'
  1151					&& uc_ptaddr[index+0x12] == 'M'
  1152					&& uc_ptaddr[index+0x13] == 'I'
  1153					&& uc_ptaddr[index+0x14] == '_'
  1154					) {
  1155				eps_table = 1;
  1156				break;
  1157			}
  1158		}
  1159	
  1160		/* If EPS table exist, read type1(system information) */
  1161		if (eps_table) {
  1162			uc_epsaddr =
  1163				(char *)ioremap(((unsigned int *)&uc_ptaddr[index+0x18])[0],
  1164				((unsigned short *)&uc_ptaddr[index+0x16])[0]);
  1165			if (!uc_epsaddr) {
  1166				uc_epsaddr =
> 1167					(char *)ioremap_cache(((unsigned int *)&uc_ptaddr[index+0x18])[0],
  1168					((unsigned short *)&uc_ptaddr[index+0x16])[0]);
  1169				if (!uc_epsaddr) {
  1170					pr_err("Error: both ioremap() and ioremap_cache() exec failed!");
  1171					return -ENXIO;
  1172				}
  1173			}
  1174	
  1175			type0_str = (int)uc_epsaddr[1];
  1176			for (i = type0_str; i < (type0_str+512); i++) {
  1177				if (uc_epsaddr[i] == 0 && uc_epsaddr[i+1] == 0 && uc_epsaddr[i+2] == 1) {
  1178					type1_str = i + uc_epsaddr[i+3];
  1179					break;
  1180				}
  1181			}
  1182			for (i = type1_str; i < (type1_str+512); i++) {
  1183				if (!strncmp(&uc_epsaddr[i], "Advantech", 9))
  1184					is_advantech = 1;
  1185	
  1186				if (uc_epsaddr[i] == 0) {
  1187					i++;
  1188					type1_str = i;
  1189					break;
  1190				}
  1191			}
  1192			length = 2;
  1193			while ((uc_epsaddr[type1_str + length] != 0)
  1194					&& (length < AMI_UEFI_ADVANTECH_BOARD_NAME_LENGTH)) {
  1195				length += 1;
  1196			}
  1197			memmove(product, &uc_epsaddr[type1_str], length);
  1198			iounmap((void *)uc_epsaddr);
  1199			if (is_advantech) {
  1200				iounmap((void *)uc_ptaddr);
  1201				return 0;
  1202			}
  1203		}
  1204	
  1205		/* It is an old BIOS, read from 0x000F0000 */
  1206		for (index = 0; index < (AMI_UEFI_ADVANTECH_BOARD_NAME_LENGTH - 3); index++) {
  1207			if (!strncmp(&uc_ptaddr[index], "TPC", 3)
  1208					|| !strncmp(&uc_ptaddr[index], "UNO", 3)
  1209					|| !strncmp(&uc_ptaddr[index], "ITA", 3)
  1210					|| !strncmp(&uc_ptaddr[index], "MIO", 3)
  1211					|| !strncmp(&uc_ptaddr[index], "ECU", 3)
  1212					|| !strncmp(&uc_ptaddr[index], "APAX", 4))
  1213				break;
  1214		}
  1215	
  1216		if (index == (AMI_UEFI_ADVANTECH_BOARD_NAME_LENGTH - 3)) {
  1217			pr_err("%s: Can't find the product name, line: %d", __func__, __LINE__);
  1218			product[0] = '\0';
  1219			iounmap((void *)uc_ptaddr);
  1220			return -ENODATA;
  1221		}
  1222	
  1223		/* Use char "Space" (ASCII code: 32) to check the end of the Product Name. */
  1224		for (i = 0; (uc_ptaddr[index+i] != 32) && (i < 31); i++)
  1225			product[i] = uc_ptaddr[index+i];
  1226	
  1227		product[i] = '\0';
  1228		pr_info("%s: BIOS Product Name = %s, line: %d", __func__, product, __LINE__);
  1229	
  1230		iounmap((void *)uc_ptaddr);
  1231	
  1232		return 0;
  1233	}
  1234	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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