[tobetter:odroid-6.1.y 20/91] drivers/pwm/pwm-gpio.c:60:22: warning: no previous prototype for function 'gpio_pwm_timer'

[kernel test robot <lkp@intel.com>]

tree:   https://github.com/tobetter/linux odroid-6.1.y
head:   4abe38fb1d55e2c5f10582404c5ff88505060b73
commit: 459931baf254b27d2ec9a732b41bf2bff9e1c1d2 [20/91] ODROID-COMMON: pwm: gpio: Add a generic gpio based PWM driver
config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20240121/202401210628.5lKKsZ7A-lkp@intel.com/config)
compiler: clang version 18.0.0git (https://github.com/llvm/llvm-project d92ce344bf641e6bb025b41b3f1a77dd25e2b3e9)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240121/202401210628.5lKKsZ7A-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202401210628.5lKKsZ7A-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/pwm/pwm-gpio.c:60:22: warning: no previous prototype for function 'gpio_pwm_timer' [-Wmissing-prototypes]
      60 | enum hrtimer_restart gpio_pwm_timer(struct hrtimer *timer)
         |                      ^
   drivers/pwm/pwm-gpio.c:60:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
      60 | enum hrtimer_restart gpio_pwm_timer(struct hrtimer *timer)
         | ^
         | static 
   drivers/pwm/pwm-gpio.c:138:3: error: field designator 'config' does not refer to any field in type 'const struct pwm_ops'
     138 |         .config = gpio_pwm_config,
         |         ~^~~~~~~~~~~~~~~~~~~~~~~~
   drivers/pwm/pwm-gpio.c:139:3: error: field designator 'set_polarity' does not refer to any field in type 'const struct pwm_ops'
     139 |         .set_polarity = gpio_pwm_set_polarity,
         |         ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/pwm/pwm-gpio.c:140:3: error: field designator 'enable' does not refer to any field in type 'const struct pwm_ops'
     140 |         .enable = gpio_pwm_enable,
         |         ~^~~~~~~~~~~~~~~~~~~~~~~~
   drivers/pwm/pwm-gpio.c:141:3: error: field designator 'disable' does not refer to any field in type 'const struct pwm_ops'
     141 |         .disable = gpio_pwm_disable,
         |         ~^~~~~~~~~~~~~~~~~~~~~~~~~~
   1 warning and 4 errors generated.


vim +/gpio_pwm_timer +60 drivers/pwm/pwm-gpio.c

    59	
  > 60	enum hrtimer_restart gpio_pwm_timer(struct hrtimer *timer)
    61	{
    62		struct gpio_pwm_data *gpio_data = container_of(timer,
    63							      struct gpio_pwm_data,
    64							      timer);
    65		if (!gpio_data->run) {
    66			gpio_pwm_off(gpio_data);
    67			gpio_data->pin_on = false;
    68			return HRTIMER_NORESTART;
    69		}
    70	
    71		if (!gpio_data->pin_on) {
    72			hrtimer_forward_now(&gpio_data->timer,
    73					    ns_to_ktime(gpio_data->on_time));
    74			gpio_pwm_on(gpio_data);
    75			gpio_data->pin_on = true;
    76		} else {
    77			hrtimer_forward_now(&gpio_data->timer,
    78					    ns_to_ktime(gpio_data->off_time));
    79			gpio_pwm_off(gpio_data);
    80			gpio_data->pin_on = false;
    81		}
    82	
    83		return HRTIMER_RESTART;
    84	}
    85	

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