Re: drivers/hwmon/ltq-cputemp.c:23:2: error: call to undeclared function 'ltq_cgu_w32'; ISO C99 and later do not support implicit function declarations

[Florian Eckert]

> > vim +/ltq_cgu_w32 +23 drivers/hwmon/ltq-cputemp.c
> >
> > 7074d0a9275860 Florian Eckert 2017-09-01  20
> > 7074d0a9275860 Florian Eckert 2017-09-01  21  static void 
> > ltq_cputemp_enable(void)
> > 7074d0a9275860 Florian Eckert 2017-09-01  22  {
> > 7074d0a9275860 Florian Eckert 2017-09-01 @23  
> > 	ltq_cgu_w32(ltq_cgu_r32(CGU_GPHY1_CR) | CGU_TEMP_PD, CGU_GPHY1_CR);
> > 7074d0a9275860 Florian Eckert 2017-09-01  24  }
> > 7074d0a9275860 Florian Eckert 2017-09-01  25
> >
> > :::::: The code at line 23 was first introduced by commit
> > :::::: 7074d0a92758603369655ef5d4f49e6caaae0b4e hwmon: (ltq-cputemp) 
> > add cpu temp sensor driver
> >
> > :::::: TO: Florian Eckert <fe@xxxxxxxxxx>
> > :::::: CC: Guenter Roeck <linux@xxxxxxxxxxxx>
>
> This driver builds fine if I change it from SOC_FALCON to SOC_XWAY.
> Maybe its Kconfig entry should be stronger?
>
> config SENSORS_LTQ_CPUTEMP
> 	bool "Lantiq cpu temperature sensor driver"
> -	depends on LANTIQ
> +	depends on SOC_XWAY

Fine with me. I think it's better to narrow it down.
Because this macro is only available for the SOC_TYPE_XWAY [1]

[1] 
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h?h=v5.17.6#n10

Best regards
-- Florian