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From: kernel test robot <lkp@intel.com>
To: kbuild-all@lists.01.org
Subject: [intel-lts:5.10/preempt-rt 10992/20574] drivers/media/i2c/ti960-des.c:129:5: warning: no previous prototype for function 'bus_switch'
Date: Sat, 08 Jan 2022 19:24:17 +0800	[thread overview]
Message-ID: <202201081941.IFSgqzSk-lkp@intel.com> (raw)

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Hi Ng,

FYI, the error/warning still remains.

tree:   https://github.com/intel/linux-intel-lts.git 5.10/preempt-rt
head:   c7241f7c2813b8e7f1831cd1dd178132c58caeb5
commit: bd8c7120c481ebe8e2e40e6b9308d689f8adfff7 [10992/20574] media: ti960: remove crlmodule dependency
config: powerpc64-allyesconfig (https://download.01.org/0day-ci/archive/20220108/202201081941.IFSgqzSk-lkp(a)intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project f3a344d2125fa37e59bae1b0874442c650a19607)
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
        # install powerpc64 cross compiling tool for clang build
        # apt-get install binutils-powerpc64-linux-gnu
        # https://github.com/intel/linux-intel-lts/commit/bd8c7120c481ebe8e2e40e6b9308d689f8adfff7
        git remote add intel-lts https://github.com/intel/linux-intel-lts.git
        git fetch --no-tags intel-lts 5.10/preempt-rt
        git checkout bd8c7120c481ebe8e2e40e6b9308d689f8adfff7
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash drivers/media/i2c/

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

All warnings (new ones prefixed by >>):

   In file included from drivers/media/i2c/ti960-des.c:4:
   In file included from include/linux/device.h:15:
   In file included from include/linux/dev_printk.h:16:
   In file included from include/linux/ratelimit.h:6:
   In file included from include/linux/sched.h:12:
   In file included from arch/powerpc/include/asm/current.h:13:
   In file included from arch/powerpc/include/asm/paca.h:17:
   In file included from arch/powerpc/include/asm/lppaca.h:46:
   In file included from arch/powerpc/include/asm/mmu.h:144:
   In file included from include/linux/bug.h:5:
   In file included from arch/powerpc/include/asm/bug.h:109:
   In file included from include/asm-generic/bug.h:20:
   In file included from include/linux/kernel.h:12:
   In file included from include/linux/bitops.h:29:
   In file included from arch/powerpc/include/asm/bitops.h:62:
   arch/powerpc/include/asm/barrier.h:49:9: warning: '__lwsync' macro redefined [-Wmacro-redefined]
   #define __lwsync()      __asm__ __volatile__ (stringify_in_c(LWSYNC) : : :"memory")
           ^
   <built-in>:311:9: note: previous definition is here
   #define __lwsync __builtin_ppc_lwsync
           ^
>> drivers/media/i2c/ti960-des.c:129:5: warning: no previous prototype for function 'bus_switch' [-Wmissing-prototypes]
   int bus_switch(struct ti960 *va)
       ^
   drivers/media/i2c/ti960-des.c:129:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int bus_switch(struct ti960 *va)
   ^
   static 
>> drivers/media/i2c/ti960-des.c:249:6: warning: logical not is only applied to the left hand side of this bitwise operator [-Wlogical-not-parentheses]
           if (!reg_val & TI960_FSIN_ENABLE) {
               ^        ~
   drivers/media/i2c/ti960-des.c:249:6: note: add parentheses after the '!' to evaluate the bitwise operator first
           if (!reg_val & TI960_FSIN_ENABLE) {
               ^
                (                          )
   drivers/media/i2c/ti960-des.c:249:6: note: add parentheses around left hand side expression to silence this warning
           if (!reg_val & TI960_FSIN_ENABLE) {
               ^
               (       )
   drivers/media/i2c/ti960-des.c:1240:15: warning: unused variable 'reset_gpio' [-Wunused-variable]
           unsigned int reset_gpio = va->pdata->reset_gpio;
                        ^
   4 warnings generated.


vim +/bus_switch +129 drivers/media/i2c/ti960-des.c

1aafb1e0df5527 Ng Khai Wen 2021-07-01  128  
d2753af810c799 Ng Khai Wen 2021-07-01 @129  int bus_switch(struct ti960 *va)
d2753af810c799 Ng Khai Wen 2021-07-01  130  {
d2753af810c799 Ng Khai Wen 2021-07-01  131  	int ret;
d2753af810c799 Ng Khai Wen 2021-07-01  132  	int retry, timeout = 10;
d2753af810c799 Ng Khai Wen 2021-07-01  133  	struct i2c_client *client = v4l2_get_subdevdata(&va->sd);
d2753af810c799 Ng Khai Wen 2021-07-01  134  
d2753af810c799 Ng Khai Wen 2021-07-01  135  	dev_dbg(&client->dev, "bus switch");
d2753af810c799 Ng Khai Wen 2021-07-01  136  	client->addr = 0x70;
d2753af810c799 Ng Khai Wen 2021-07-01  137  	for (retry = 0; retry < timeout; retry++) {
d2753af810c799 Ng Khai Wen 2021-07-01  138  		ret = i2c_smbus_write_byte(client, 0x01);
d2753af810c799 Ng Khai Wen 2021-07-01  139  		if (ret < 0)
d2753af810c799 Ng Khai Wen 2021-07-01  140  			usleep_range(5000, 6000);
d2753af810c799 Ng Khai Wen 2021-07-01  141  		else
d2753af810c799 Ng Khai Wen 2021-07-01  142  			break;
d2753af810c799 Ng Khai Wen 2021-07-01  143  	}
d2753af810c799 Ng Khai Wen 2021-07-01  144  
d2753af810c799 Ng Khai Wen 2021-07-01  145  	client->addr = TI960_I2C_ADDRESS;
d2753af810c799 Ng Khai Wen 2021-07-01  146  	if (retry >= timeout) {
d2753af810c799 Ng Khai Wen 2021-07-01  147  		dev_err(&client->dev, "bus switch failed");
d2753af810c799 Ng Khai Wen 2021-07-01  148  		return -EREMOTEIO;
d2753af810c799 Ng Khai Wen 2021-07-01  149  	}
d2753af810c799 Ng Khai Wen 2021-07-01  150  
d2753af810c799 Ng Khai Wen 2021-07-01  151  	return 0;
d2753af810c799 Ng Khai Wen 2021-07-01  152  }
d2753af810c799 Ng Khai Wen 2021-07-01  153  
1aafb1e0df5527 Ng Khai Wen 2021-07-01  154  static int ti960_reg_read(struct ti960 *va, unsigned char reg, unsigned int *val)
1aafb1e0df5527 Ng Khai Wen 2021-07-01  155  {
1aafb1e0df5527 Ng Khai Wen 2021-07-01  156  	int ret, retry, timeout = 10;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  157  
1aafb1e0df5527 Ng Khai Wen 2021-07-01  158  	for (retry = 0; retry < timeout; retry++) {
1aafb1e0df5527 Ng Khai Wen 2021-07-01  159  		ret = regmap_read(va->regmap8, reg, val);
1aafb1e0df5527 Ng Khai Wen 2021-07-01  160  		if (ret < 0) {
1aafb1e0df5527 Ng Khai Wen 2021-07-01  161  			dev_err(va->sd.dev, "960 reg read ret=%x", ret);
1aafb1e0df5527 Ng Khai Wen 2021-07-01  162  			usleep_range(5000, 6000);
1aafb1e0df5527 Ng Khai Wen 2021-07-01  163  		} else {
1aafb1e0df5527 Ng Khai Wen 2021-07-01  164  			break;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  165  		}
1aafb1e0df5527 Ng Khai Wen 2021-07-01  166  	}
1aafb1e0df5527 Ng Khai Wen 2021-07-01  167  
1aafb1e0df5527 Ng Khai Wen 2021-07-01  168  	if (retry >= timeout) {
1aafb1e0df5527 Ng Khai Wen 2021-07-01  169  		dev_err(va->sd.dev,
1aafb1e0df5527 Ng Khai Wen 2021-07-01  170  			"%s:devid read failed: reg=%2x, ret=%d\n",
1aafb1e0df5527 Ng Khai Wen 2021-07-01  171  			__func__, reg, ret);
1aafb1e0df5527 Ng Khai Wen 2021-07-01  172  		return -EREMOTEIO;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  173  	}
1aafb1e0df5527 Ng Khai Wen 2021-07-01  174  
1aafb1e0df5527 Ng Khai Wen 2021-07-01  175  	return 0;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  176  }
1aafb1e0df5527 Ng Khai Wen 2021-07-01  177  
1aafb1e0df5527 Ng Khai Wen 2021-07-01  178  static int ti960_reg_set_bit(struct ti960 *va, unsigned char reg,
1aafb1e0df5527 Ng Khai Wen 2021-07-01  179  	unsigned char bit, unsigned char val)
1aafb1e0df5527 Ng Khai Wen 2021-07-01  180  {
1aafb1e0df5527 Ng Khai Wen 2021-07-01  181  	int ret;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  182  	unsigned int reg_val;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  183  
1aafb1e0df5527 Ng Khai Wen 2021-07-01  184  	ret = regmap_read(va->regmap8, reg, &reg_val);
1aafb1e0df5527 Ng Khai Wen 2021-07-01  185  	if (ret)
1aafb1e0df5527 Ng Khai Wen 2021-07-01  186  		return ret;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  187  	if (val)
1aafb1e0df5527 Ng Khai Wen 2021-07-01  188  		reg_val |= 1 << bit;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  189  	else
1aafb1e0df5527 Ng Khai Wen 2021-07-01  190  		reg_val &= ~(1 << bit);
1aafb1e0df5527 Ng Khai Wen 2021-07-01  191  
1aafb1e0df5527 Ng Khai Wen 2021-07-01  192  	return regmap_write(va->regmap8, reg, reg_val);
1aafb1e0df5527 Ng Khai Wen 2021-07-01  193  }
1aafb1e0df5527 Ng Khai Wen 2021-07-01  194  
1aafb1e0df5527 Ng Khai Wen 2021-07-01  195  static int ti960_map_phy_i2c_addr(struct ti960 *va, unsigned short rx_port,
1aafb1e0df5527 Ng Khai Wen 2021-07-01  196  			      unsigned short addr)
1aafb1e0df5527 Ng Khai Wen 2021-07-01  197  {
1aafb1e0df5527 Ng Khai Wen 2021-07-01  198  	int rval;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  199  
1aafb1e0df5527 Ng Khai Wen 2021-07-01  200  	rval = regmap_write(va->regmap8, TI960_RX_PORT_SEL,
1aafb1e0df5527 Ng Khai Wen 2021-07-01  201  		(rx_port << 4) + (1 << rx_port));
1aafb1e0df5527 Ng Khai Wen 2021-07-01  202  	if (rval)
1aafb1e0df5527 Ng Khai Wen 2021-07-01  203  		return rval;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  204  
1aafb1e0df5527 Ng Khai Wen 2021-07-01  205  	return regmap_write(va->regmap8, TI960_SLAVE_ID0, addr);
1aafb1e0df5527 Ng Khai Wen 2021-07-01  206  }
1aafb1e0df5527 Ng Khai Wen 2021-07-01  207  
1aafb1e0df5527 Ng Khai Wen 2021-07-01  208  static int ti960_map_alias_i2c_addr(struct ti960 *va, unsigned short rx_port,
1aafb1e0df5527 Ng Khai Wen 2021-07-01  209  			      unsigned short addr)
1aafb1e0df5527 Ng Khai Wen 2021-07-01  210  {
1aafb1e0df5527 Ng Khai Wen 2021-07-01  211  	int rval;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  212  
1aafb1e0df5527 Ng Khai Wen 2021-07-01  213  	rval = regmap_write(va->regmap8, TI960_RX_PORT_SEL,
1aafb1e0df5527 Ng Khai Wen 2021-07-01  214  		(rx_port << 4) + (1 << rx_port));
1aafb1e0df5527 Ng Khai Wen 2021-07-01  215  	if (rval)
1aafb1e0df5527 Ng Khai Wen 2021-07-01  216  		return rval;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  217  
1aafb1e0df5527 Ng Khai Wen 2021-07-01  218  	return regmap_write(va->regmap8, TI960_SLAVE_ALIAS_ID0, addr);
1aafb1e0df5527 Ng Khai Wen 2021-07-01  219  }
1aafb1e0df5527 Ng Khai Wen 2021-07-01  220  
1aafb1e0df5527 Ng Khai Wen 2021-07-01  221  static int ti960_map_ser_alias_addr(struct ti960 *va, unsigned short rx_port,
1aafb1e0df5527 Ng Khai Wen 2021-07-01  222  			      unsigned short ser_alias)
1aafb1e0df5527 Ng Khai Wen 2021-07-01  223  {
1aafb1e0df5527 Ng Khai Wen 2021-07-01  224  	int rval;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  225  
1aafb1e0df5527 Ng Khai Wen 2021-07-01  226  	dev_dbg(va->sd.dev, "%s port %d, ser_alias %x\n", __func__, rx_port, ser_alias);
1aafb1e0df5527 Ng Khai Wen 2021-07-01  227  	rval = regmap_write(va->regmap8, TI960_RX_PORT_SEL,
1aafb1e0df5527 Ng Khai Wen 2021-07-01  228  		(rx_port << 4) + (1 << rx_port));
1aafb1e0df5527 Ng Khai Wen 2021-07-01  229  	if (rval)
1aafb1e0df5527 Ng Khai Wen 2021-07-01  230  		return rval;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  231  
1aafb1e0df5527 Ng Khai Wen 2021-07-01  232  	return regmap_write(va->regmap8, TI960_SER_ALIAS_ID, ser_alias);
1aafb1e0df5527 Ng Khai Wen 2021-07-01  233  }
1aafb1e0df5527 Ng Khai Wen 2021-07-01  234  
1aafb1e0df5527 Ng Khai Wen 2021-07-01  235  static int ti960_fsin_gpio_init(struct ti960 *va, unsigned short rx_port,
1aafb1e0df5527 Ng Khai Wen 2021-07-01  236  		unsigned short ser_alias, unsigned short fsin_gpio)
1aafb1e0df5527 Ng Khai Wen 2021-07-01  237  {
1aafb1e0df5527 Ng Khai Wen 2021-07-01  238  	unsigned char gpio_data;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  239  	int rval;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  240  	int reg_val;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  241  
1aafb1e0df5527 Ng Khai Wen 2021-07-01  242  	dev_dbg(va->sd.dev, "%s\n", __func__);
1aafb1e0df5527 Ng Khai Wen 2021-07-01  243  	rval = regmap_read(va->regmap8, TI960_FS_CTL, &reg_val);
1aafb1e0df5527 Ng Khai Wen 2021-07-01  244  	if (rval) {
1aafb1e0df5527 Ng Khai Wen 2021-07-01  245  		dev_dbg(va->sd.dev, "Failed to read gpio status.\n");
1aafb1e0df5527 Ng Khai Wen 2021-07-01  246  		return rval;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  247  	}
1aafb1e0df5527 Ng Khai Wen 2021-07-01  248  
1aafb1e0df5527 Ng Khai Wen 2021-07-01 @249  	if (!reg_val & TI960_FSIN_ENABLE) {
1aafb1e0df5527 Ng Khai Wen 2021-07-01  250  		dev_dbg(va->sd.dev, "FSIN not enabled, skip config FSIN GPIO.\n");
1aafb1e0df5527 Ng Khai Wen 2021-07-01  251  		return 0;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  252  	}
1aafb1e0df5527 Ng Khai Wen 2021-07-01  253  
1aafb1e0df5527 Ng Khai Wen 2021-07-01  254  	rval = regmap_write(va->regmap8, TI960_RX_PORT_SEL,
1aafb1e0df5527 Ng Khai Wen 2021-07-01  255  		(rx_port << 4) + (1 << rx_port));
1aafb1e0df5527 Ng Khai Wen 2021-07-01  256  	if (rval)
1aafb1e0df5527 Ng Khai Wen 2021-07-01  257  		return rval;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  258  
1aafb1e0df5527 Ng Khai Wen 2021-07-01  259  	switch (fsin_gpio) {
1aafb1e0df5527 Ng Khai Wen 2021-07-01  260  	case 0:
1aafb1e0df5527 Ng Khai Wen 2021-07-01  261  	case 1:
1aafb1e0df5527 Ng Khai Wen 2021-07-01  262  		rval = regmap_read(va->regmap8, TI960_BC_GPIO_CTL0, &reg_val);
1aafb1e0df5527 Ng Khai Wen 2021-07-01  263  		if (rval) {
1aafb1e0df5527 Ng Khai Wen 2021-07-01  264  			dev_dbg(va->sd.dev, "Failed to read gpio status.\n");
1aafb1e0df5527 Ng Khai Wen 2021-07-01  265  			return rval;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  266  		}
1aafb1e0df5527 Ng Khai Wen 2021-07-01  267  
1aafb1e0df5527 Ng Khai Wen 2021-07-01  268  		if (fsin_gpio == 0) {
1aafb1e0df5527 Ng Khai Wen 2021-07-01  269  			reg_val &= ~TI960_GPIO0_MASK;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  270  			reg_val |= TI960_GPIO0_FSIN;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  271  		} else {
1aafb1e0df5527 Ng Khai Wen 2021-07-01  272  			reg_val &= ~TI960_GPIO1_MASK;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  273  			reg_val |= TI960_GPIO1_FSIN;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  274  		}
1aafb1e0df5527 Ng Khai Wen 2021-07-01  275  
1aafb1e0df5527 Ng Khai Wen 2021-07-01  276  		rval = regmap_write(va->regmap8, TI960_BC_GPIO_CTL0, reg_val);
1aafb1e0df5527 Ng Khai Wen 2021-07-01  277  		if (rval)
1aafb1e0df5527 Ng Khai Wen 2021-07-01  278  			dev_dbg(va->sd.dev, "Failed to set gpio.\n");
1aafb1e0df5527 Ng Khai Wen 2021-07-01  279  		break;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  280  	case 2:
1aafb1e0df5527 Ng Khai Wen 2021-07-01  281  	case 3:
1aafb1e0df5527 Ng Khai Wen 2021-07-01  282  		rval = regmap_read(va->regmap8, TI960_BC_GPIO_CTL1, &reg_val);
1aafb1e0df5527 Ng Khai Wen 2021-07-01  283  		if (rval) {
1aafb1e0df5527 Ng Khai Wen 2021-07-01  284  			dev_dbg(va->sd.dev, "Failed to read gpio status.\n");
1aafb1e0df5527 Ng Khai Wen 2021-07-01  285  			return rval;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  286  		}
1aafb1e0df5527 Ng Khai Wen 2021-07-01  287  
1aafb1e0df5527 Ng Khai Wen 2021-07-01  288  		if (fsin_gpio == 2) {
1aafb1e0df5527 Ng Khai Wen 2021-07-01  289  			reg_val &= ~TI960_GPIO2_MASK;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  290  			reg_val |= TI960_GPIO2_FSIN;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  291  		} else {
1aafb1e0df5527 Ng Khai Wen 2021-07-01  292  			reg_val &= ~TI960_GPIO3_MASK;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  293  			reg_val |= TI960_GPIO3_FSIN;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  294  		}
1aafb1e0df5527 Ng Khai Wen 2021-07-01  295  
1aafb1e0df5527 Ng Khai Wen 2021-07-01  296  		rval = regmap_write(va->regmap8, TI960_BC_GPIO_CTL1, reg_val);
1aafb1e0df5527 Ng Khai Wen 2021-07-01  297  		if (rval)
1aafb1e0df5527 Ng Khai Wen 2021-07-01  298  			dev_dbg(va->sd.dev, "Failed to set gpio.\n");
1aafb1e0df5527 Ng Khai Wen 2021-07-01  299  		break;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  300  	}
1aafb1e0df5527 Ng Khai Wen 2021-07-01  301  
1aafb1e0df5527 Ng Khai Wen 2021-07-01  302  	/* enable output and remote control */
1aafb1e0df5527 Ng Khai Wen 2021-07-01  303  	ti953_reg_write(&va->sd, rx_port, ser_alias, TI953_GPIO_INPUT_CTRL, TI953_GPIO_OUT_EN);
1aafb1e0df5527 Ng Khai Wen 2021-07-01  304  	rval = ti953_reg_read(&va->sd, rx_port, ser_alias, TI953_LOCAL_GPIO_DATA,
1aafb1e0df5527 Ng Khai Wen 2021-07-01  305  			&gpio_data);
1aafb1e0df5527 Ng Khai Wen 2021-07-01  306  	if (rval)
1aafb1e0df5527 Ng Khai Wen 2021-07-01  307  		return rval;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  308  	ti953_reg_write(&va->sd, rx_port, ser_alias, TI953_LOCAL_GPIO_DATA,
1aafb1e0df5527 Ng Khai Wen 2021-07-01  309  			gpio_data | TI953_GPIO0_RMTEN << fsin_gpio);
1aafb1e0df5527 Ng Khai Wen 2021-07-01  310  
1aafb1e0df5527 Ng Khai Wen 2021-07-01  311  	return rval;
1aafb1e0df5527 Ng Khai Wen 2021-07-01  312  }
1aafb1e0df5527 Ng Khai Wen 2021-07-01  313  

:::::: The code@line 129 was first introduced by commit
:::::: d2753af810c79927ae6a70fd532a0b19d9816dc5 media: intel-ipu6: add ti960 driver

:::::: TO: Ng Khai Wen <khai.wen.ng@intel.com>
:::::: CC: Pan, Kris <kris.pan@intel.com>

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

                 reply	other threads:[~2022-01-08 11:24 UTC|newest]

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