[RFC] S3C24xx: Enable only the clocks of used units

Juergen Beisert jbe at pengutronix.de
Tue Oct 19 02:55:18 EDT 2010


Jean-Christophe PLAGNIOL-VILLARD wrote:
> > -	mov r1, #0xFFFFFFF0
> > +	/*
> > +	 * Disable the clocks for most devices on this chip.
> > +	 * They will be enabled again on demand
> > +	 */
> > +#ifdef CONFIG_S3C24XX_NAND_BOOT
> > +	ldr r1, =0x6010 /* (CLK_RTC | CLK_GPIO | CLK_NAND) */
> > +#else
> > +	mov r1, #0x6000 /* (CLK_RTC | CLK_GPIO) */
>
> how about use the macro and define a macro to avoid the ifdef

I tried with macros, but the assembler failed. Can't remember why. But I tried 
again a few minutes ago .... and now it works (????).

Do you mean something like this instead?

[...]
#ifdef CONFIG_S3C24XX_NAND_BOOT
# define FORCED_CLOCKS (CLK_RTC | CLK_GPIO | CLK_NAND)
#else
# define FORCED_CLOCKS (CLK_RTC | CLK_GPIO)
#endif

	/*
	 * Disable the clocks for most devices on this chip.
	 * They will be enabled again on demand
	 */
	ldr r1, =FORCED_CLOCKS
[...]

jbe

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