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Commit 140780ab authored by Ben Dooks's avatar Ben Dooks Committed by Ben Dooks
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ARM: S3C24XX: CPUFREQ: S3C2412/S3C2443 IO timing support 



Add IO bank timing support for S3C2412/S3C2443.

Signed-off-by: default avatarBen Dooks <ben@simtec.co.uk>
Signed-off-by: default avatarBen Dooks <ben-linux@fluff.org>
parent 25400036

arch/arm/mach-s3c2412/Kconfig

+3 −0
Original line number Diff line number Diff line
@@ -32,9 +32,12 @@ config S3C2412_PM 
	help

	  Internal config node to apply S3C2412 power management



# Note, the S3C2412 IOtiming support is in plat-s3c24xx



config S3C2412_CPUFREQ

	bool

	depends on CPU_FREQ_S3C24XX && CPU_S3C2412

	select S3C2412_IOTIMING

	default y

	help

	  CPU Frequency scaling support for S3C2412 and S3C2413 SoC CPUs.

arch/arm/mach-s3c2412/cpu-freq.c

+4 −0
Original line number Diff line number Diff line
@@ -185,6 +185,10 @@ static struct s3c_cpufreq_info s3c2412_cpufreq_info = { 
	.set_divs	= s3c2412_cpufreq_setdivs,

	.calc_divs	= s3c2412_cpufreq_calcdivs,



	.calc_iotiming	= s3c2412_iotiming_calc,

	.set_iotiming	= s3c2412_iotiming_set,

	.get_iotiming	= s3c2412_iotiming_get,



	.resume_clocks	= s3c2412_setup_clocks,

};

arch/arm/plat-s3c24xx/Kconfig

+9 −0
Original line number Diff line number Diff line
@@ -157,6 +157,15 @@ config S3C2410_CPUFREQ_UTILS 
	  Internal node to select timing code that is common to the s3c2410

	  and s3c2440/s3c244 cpu frequency support.



# cpu frequency support common to s3c2412, s3c2413 and s3c2442



config S3C2412_IOTIMING

	bool

	depends on CPU_FREQ_S3C24XX && (CPU_S3C2412 || CPU_S3C2443)

	help

	  Intel node to select io timing code that is common to the s3c2412

	  and the s3c2443.



config MACH_SMDK

	bool

	help

arch/arm/plat-s3c24xx/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -40,6 +40,7 @@ obj-$(CONFIG_S3C2410_CLOCK) += s3c2410-clock.o 
obj-$(CONFIG_S3C2410_DMA)	+= dma.o

obj-$(CONFIG_S3C24XX_ADC)	+= adc.o

obj-$(CONFIG_S3C2410_IOTIMING)	+= s3c2410-iotiming.o

obj-$(CONFIG_S3C2412_IOTIMING)	+= s3c2412-iotiming.o

obj-$(CONFIG_S3C2410_CPUFREQ_UTILS) += s3c2410-cpufreq-utils.o



# device specific setup and/or initialisation

arch/arm/plat-s3c24xx/include/plat/cpu-freq-core.h

+51 −1
Original line number Diff line number Diff line
@@ -42,8 +42,44 @@ struct s3c2410_iobank_timing { 
	unsigned char	nwait_en;	/* nWait enabled for bank. */

};



/**

 * struct s3c2412_iobank_timing - io timings for PL092 (S3C2412) style IO

 * @idcy: The idle cycle time between transactions.

 * @wstrd: nCS release to end of read cycle.

 * @wstwr: nCS release to end of write cycle.

 * @wstoen: nCS assertion to nOE assertion time.

 * @wstwen: nCS assertion to nWE assertion time.

 * @wstbrd: Burst ready delay.

 * @smbidcyr: Register cache for smbidcyr value.

 * @smbwstrd: Register cache for smbwstrd value.

 * @smbwstwr: Register cache for smbwstwr value.

 * @smbwstoen: Register cache for smbwstoen value.

 * @smbwstwen: Register cache for smbwstwen value.

 * @smbwstbrd: Register cache for smbwstbrd value.

 *

 * Timing information for a IO bank on an S3C2412 or similar system which

 * uses a PL093 block.

 */

struct s3c2412_iobank_timing {

	unsigned int	idcy;

	unsigned int	wstrd;

	unsigned int	wstwr;

	unsigned int	wstoen;

	unsigned int	wstwen;

	unsigned int	wstbrd;



	/* register cache */

	unsigned char	smbidcyr;

	unsigned char	smbwstrd;

	unsigned char	smbwstwr;

	unsigned char	smbwstoen;

	unsigned char	smbwstwen;

	unsigned char	smbwstbrd;

};



union s3c_iobank {

	struct s3c2410_iobank_timing	*io_2410;

	struct s3c2412_iobank_timing	*io_2412;

};



/**
@@ -174,6 +210,20 @@ extern void s3c2410_iotiming_set(struct s3c_cpufreq_config *cfg, 


extern void s3c2410_set_fvco(struct s3c_cpufreq_config *cfg);



/* S3C2412 compatible routines */



extern int s3c2412_iotiming_get(struct s3c_cpufreq_config *cfg,

				struct s3c_iotimings *timings);



extern int s3c2412_iotiming_get(struct s3c_cpufreq_config *cfg,

				struct s3c_iotimings *timings);



extern int s3c2412_iotiming_calc(struct s3c_cpufreq_config *cfg,

				 struct s3c_iotimings *iot);



extern void s3c2412_iotiming_set(struct s3c_cpufreq_config *cfg,

				 struct s3c_iotimings *iot);



#ifdef CONFIG_CPU_FREQ_S3C24XX_DEBUG

#define s3c_freq_dbg(x...) printk(KERN_INFO x)

#else