Re: [PATCH 2/3] hwmon: ltc2992: Add support for GPIOs.

From: kernel test robot
Date: Fri Oct 30 2020 - 04:16:24 EST


Hi,

I love your patch! Perhaps something to improve:

[auto build test WARNING on hwmon/hwmon-next]
[also build test WARNING on linus/master linux/master v5.10-rc1 next-20201029]
[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/alexandru-tachici-analog-com/hwmon-ltc2992-Add-support/20201029-174720
base: https://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging.git hwmon-next
config: x86_64-randconfig-r023-20201030 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 772aaa602383cf82795572ebcd86b0e660f3579f)
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 x86_64 cross compiling tool for clang build
# apt-get install binutils-x86-64-linux-gnu
# https://github.com/0day-ci/linux/commit/f74af3cc59b7d9de6545502e7d01df6e01f96773
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review alexandru-tachici-analog-com/hwmon-ltc2992-Add-support/20201029-174720
git checkout f74af3cc59b7d9de6545502e7d01df6e01f96773
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64

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

All warnings (new ones prefixed by >>):

>> drivers/hwmon/ltc2992.c:276:6: warning: no previous prototype for function 'ltc2992_gpio_set_multiple' [-Wmissing-prototypes]
void ltc2992_gpio_set_multiple(struct gpio_chip *chip, unsigned long *mask, unsigned long *bits)
^
drivers/hwmon/ltc2992.c:276:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void ltc2992_gpio_set_multiple(struct gpio_chip *chip, unsigned long *mask, unsigned long *bits)
^
static
1 warning generated.

vim +/ltc2992_gpio_set_multiple +276 drivers/hwmon/ltc2992.c

275
> 276 void ltc2992_gpio_set_multiple(struct gpio_chip *chip, unsigned long *mask, unsigned long *bits)
277 {
278 struct ltc2992_state *st = gpiochip_get_data(chip);
279 unsigned long gpio_ctrl_io = 0;
280 unsigned long gpio_ctrl = 0;
281 unsigned int gpio_nr;
282
283 for_each_set_bit(gpio_nr, mask, LTC2992_GPIO_NR) {
284 if (gpio_nr < 3)
285 assign_bit(ltc2992_gpio_addr_map[gpio_nr].ctrl_bit, &gpio_ctrl_io, true);
286
287 if (gpio_nr == 3)
288 assign_bit(ltc2992_gpio_addr_map[gpio_nr].ctrl_bit, &gpio_ctrl, true);
289 }
290
291 mutex_lock(&st->gpio_mutex);
292 ltc2992_write_reg(st, LTC2992_GPIO_IO_CTRL, 1, gpio_ctrl_io);
293 ltc2992_write_reg(st, LTC2992_GPIO_CTRL, 1, gpio_ctrl);
294 mutex_unlock(&st->gpio_mutex);
295 }
296

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

Attachment: .config.gz
Description: application/gzip