linux-kernel - RE: [PATCH resend2] s3c24xx: cpufreq: Fix compilation error when CONFIG_CPU_FREQ_S3C24XX

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Date:	Tue, 06 Dec 2011 20:31:15 +0900
From:	Kukjin Kim <kgene.kim@...sung.com>
To:	'Denis Kuzmenko' <linux@...onet.org.ua>,
	'Russell King' <linux@....linux.org.uk>,
	'Ben Dooks' <ben-linux@...ff.org>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-samsung-soc@...r.kernel.org
Subject: RE: [PATCH resend2] s3c24xx: cpufreq: Fix compilation error when
 CONFIG_CPU_FREQ_S3C24XX_DEBUGFS selected.

Denis Kuzmenko wrote:
> 
> Fix compilation error when CONFIG_CPU_FREQ_S3C24XX_DEBUGFS selected.
> 
> Signed-off-by: Denis Kuzmenko <linux@...onet.org.ua>
> ---
> 
> Patch is against 3.2-rc3.
> CONFIG_S3C2410_IOTIMING wasn't present in Kconfig but was referenced by
> Makefile. Because of this the file s3c2410-iotiming.c was not ever
> compiled

Well, there is 'S3C2410_IOTIMING' at arch/arm/plat-s3c24xx/Kconfig and it
had dependency of 'CONFIG_CPU_FREQ_S3C24XX'...

Thanks.

Best regards,
Kgene.
--
Kukjin Kim <kgene.kim@...sung.com>, Senior Engineer,
SW Solution Development Team, Samsung Electronics Co., Ltd.

> and enabling CONFIG_CPU_FREQ_S3C24XX_DEBUGFS option caused undefined
> reference to function s3c2410_iotiming_debugfs defined in that file.
> 
> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> index 44789ef..81d7025 100644
> --- a/arch/arm/Kconfig
> +++ b/arch/arm/Kconfig
> @@ -2104,9 +2104,31 @@ config CPU_FREQ_S3C24XX_DEBUG
>  	help
>  	  Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
>  +config S3C2410_IOTIMING
> +	bool "CPUfreq iotiming for Samsung S3C2410 series CPUs"
> +	depends on ARCH_S3C2410 && CPU_FREQ && CPU_FREQ_S3C24XX &&
> EXPERIMENTAL
> +	help
> +	  This enables the CPUfreq driver for the Samsung S3C24XX to change
> +	  IO timing according to the CPU frequency.
> +
> +	  For details, take a look at <file:Documentation/cpu-freq>.
> +
> +	  If in doubt, say Y.
> +
> +config S3C2412_IOTIMING
> +	bool "CPUfreq iotiming for Samsung S3C2412 series CPUs"
> +	depends on ARCH_S3C2412 && CPU_FREQ && CPU_FREQ_S3C24XX &&
> EXPERIMENTAL
> +	help
> +	  This enables the CPUfreq driver for the Samsung S3C2412 to change
> +	  IO timing according to the CPU frequency.
> +
> +	  For details, take a look at <file:Documentation/cpu-freq>.
> +
> +	  If in doubt, say Y.
> +
>  config CPU_FREQ_S3C24XX_IODEBUG
>  	bool "Debug CPUfreq Samsung driver IO timing"
> -	depends on CPU_FREQ_S3C24XX
> +	depends on CPU_FREQ_S3C24XX && (S3C2410_IOTIMING ||
> S3C2412_IOTIMING)
>  	help
>  	  Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
>  diff --git a/arch/arm/plat-samsung/include/plat/cpu-freq-core.h
> b/arch/arm/plat-samsung/include/plat/cpu-freq-core.h
> index dac4760..c465252 100644
> --- a/arch/arm/plat-samsung/include/plat/cpu-freq-core.h
> +++ b/arch/arm/plat-samsung/include/plat/cpu-freq-core.h
> @@ -202,13 +202,23 @@ extern int s3c_plltab_register(struct
> cpufreq_frequency_table *plls,
>  extern struct s3c_cpufreq_config *s3c_cpufreq_getconfig(void);
>  extern struct s3c_iotimings *s3c_cpufreq_getiotimings(void);
>  -extern void s3c2410_iotiming_debugfs(struct seq_file *seq,
> -				     struct s3c_cpufreq_config *cfg,
> -				     union s3c_iobank *iob);
> -
> -extern void s3c2412_iotiming_debugfs(struct seq_file *seq,
> -				     struct s3c_cpufreq_config *cfg,
> -				     union s3c_iobank *iob);
> +#ifdef CONFIG_CPU_FREQ_S3C24XX_DEBUGFS
> +	#ifdef CONFIG_S3C2410_IOTIMING
> +	extern void s3c2410_iotiming_debugfs(struct seq_file *seq,
> +					     struct s3c_cpufreq_config *cfg,
> +					     union s3c_iobank *iob);
> +	#else
> +	#define s3c2410_iotiming_debugfs	NULL
> +	#endif
> +
> +	#ifdef CONFIG_S3C2412_IOTIMING
> +	extern void s3c2412_iotiming_debugfs(struct seq_file *seq,
> +					     struct s3c_cpufreq_config *cfg,
> +					     union s3c_iobank *iob);
> +	#else
> +	#define s3c2412_iotiming_debugfs	NULL
> +	#endif
> +#endif
>   #ifdef CONFIG_CPU_FREQ_S3C24XX_DEBUGFS
>  #define s3c_cpufreq_debugfs_call(x) x
> @@ -241,10 +251,7 @@ extern void s3c2410_iotiming_set(struct
> s3c_cpufreq_config *cfg,
>  #endif /* CONFIG_S3C2410_IOTIMING */
>   /* S3C2412 compatible routines */
> -
> -extern int s3c2412_iotiming_get(struct s3c_cpufreq_config *cfg,
> -				struct s3c_iotimings *timings);
> -
> +#ifdef CONFIG_S3C2412_IOTIMING
>  extern int s3c2412_iotiming_get(struct s3c_cpufreq_config *cfg,
>  				struct s3c_iotimings *timings);
>  @@ -253,6 +260,11 @@ extern int s3c2412_iotiming_calc(struct
> s3c_cpufreq_config *cfg,
>   extern void s3c2412_iotiming_set(struct s3c_cpufreq_config *cfg,
>  				 struct s3c_iotimings *iot);
> +#else
> +#define s3c2412_iotiming_calc NULL
> +#define s3c2412_iotiming_get NULL
> +#define s3c2412_iotiming_set NULL
> +#endif
>   #ifdef CONFIG_CPU_FREQ_S3C24XX_DEBUG
>  #define s3c_freq_dbg(x...) printk(KERN_INFO x)

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