[PATCH v2.6.34-rc2] s3c: Fix GPIOs bank H and J not being preserved during suspend on S3C24XX

[Ben Dooks]

On Tue, May 04, 2010 at 09:34:01AM +0200, christian pellegrin wrote:
> On Tue, May 4, 2010 at 9:01 AM, Ben Dooks <ben-linux at fluff.org> wrote:
> 
> >
> > could you send the gpio fix with the above change as a seperate patch
> > please?
> >
> 
> Yes, no problem, I'll just wait for the "up-comming s3c2410_gpio
> fallout" patches so I can test everything with the new functions.
> 
> BTW there is a nastiness in mixing old-style s3c24xx gpios and gpiolib
> ones for the J port found in the s3c2440. For the former you have to
> use S3C241?_GPJ* macros in regs-gpioj.h, for the later S3C2410_GPJ().
> The reason of this is the "hole" in GPIO registers address which
> breaks S3C2410_GPIO_BASE. So I'm looking forward for your
> reorganization of s3c24xx gpio to see if a patch is needed for this.
> Right now I'm using:

Yes, one of the reasons for these changes is to remove the gpio->regaddr
mappings we've been keeping around for a while. Given the new gpiolib code
it makes sense to base all the platform specific calls off the same numbering
scheme and even use the same data structures.

I'll post a series from the following, possibly later today.

http://git.fluff.org/gitweb?p=bjdooks/linux.git;a=shortlog;h=refs/heads/for-2635/s3c24xx-gpio
 
> diff --git a/arch/arm/mach-s3c2410/include/mach/regs-gpio.h
> b/arch/arm/mach-s3c2410/include/mach/regs-gpio.h
> index ebc85c6..a2eab90 100644
> --- a/arch/arm/mach-s3c2410/include/mach/regs-gpio.h
> +++ b/arch/arm/mach-s3c2410/include/mach/regs-gpio.h
> @@ -37,7 +37,16 @@
>                                   S3C2400_BASEC2H(pin)+S3C24XX_VA_GPIO)
> 
> 
> -#define S3C2410_GPIO_BASE(pin)   ((((pin) & ~31) >> 1) + S3C24XX_VA_GPIO)
> +#if !defined(__ASSEMBLER__) && defined(S3C24XX_VA_GPIO)
> +static inline void *S3C2410_GPIO_BASE(unsigned int pin)
> +{
> +	unsigned int off = (pin & ~31) >> 1;
> +
> +	if ((pin & ~31) == S3C2410_GPIO_J_START)
> +		off += 0x50;
> +	return S3C24XX_VA_GPIO + off;
> +}
> +#endif
>  #define S3C2410_GPIO_OFFSET(pin) ((pin) & 31)
> 
> so if I use, by mistake, S3C2410_GPJ() in s3c2410_gpio_cfgpin I don't
> shoot myself in the foot. If I understand you intentions S3C241?_GPJ*
> will go away after the mentioned patch series. Anyway I wait for your
> reorganization of s3c gpios to resubmit these patches if needed.
> 
> Thanks,
> 
> -- 
> Christian Pellegrin, see http://www.evolware.org/chri/
> "Real Programmers don't play tennis, or any other sport which requires
> you to change clothes. Mountain climbing is OK, and Real Programmers
> wear their climbing boots to work in case a mountain should suddenly
> spring up in the middle of the computer room."
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-- 
-- 
Ben

Q:      What's a light-year?
A:      One-third less calories than a regular year.