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[POWERPC] cpm2: Add cpm2_set_pin(). 

This provides a generic way for board code to set up CPM pins, rather
than directly poking magic values into registers.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Scott Wood 2007-07-16 13:32:24 -05:00 committed by Kumar Gala
parent 2652d4ec4a
commit 7f21f52940
2 changed files with 42 additions and 0 deletions
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33
arch/powerpc/sysdev/cpm2_common.c
View File

@ -422,3 +422,36 @@ void *cpm_dpram_addr(unsigned long offset)
return (void *)(im_dprambase + offset);
}
EXPORT_SYMBOL(cpm_dpram_addr);
struct cpm2_ioports {
u32 dir, par, sor, odr, dat;
u32 res[3];
};
void cpm2_set_pin(int port, int pin, int flags)
{
struct cpm2_ioports __iomem *iop =
(struct cpm2_ioports __iomem *)&cpm2_immr->im_ioport;
pin = 1 << (31 - pin);
if (flags & CPM_PIN_OUTPUT)
setbits32(&iop[port].dir, pin);
else
clrbits32(&iop[port].dir, pin);
if (!(flags & CPM_PIN_GPIO))
setbits32(&iop[port].par, pin);
else
clrbits32(&iop[port].par, pin);
if (flags & CPM_PIN_SECONDARY)
setbits32(&iop[port].sor, pin);
else
clrbits32(&iop[port].sor, pin);
if (flags & CPM_PIN_OPENDRAIN)
setbits32(&iop[port].odr, pin);
else
clrbits32(&iop[port].odr, pin);
}

9
include/asm-powerpc/cpm2.h
View File

@ -1247,5 +1247,14 @@ enum cpm_clk {
extern int cpm2_clk_setup(enum cpm_clk_target target, int clock, int mode);
extern int cpm2_smc_clk_setup(enum cpm_clk_target target, int clock);
#define CPM_PIN_INPUT 0
#define CPM_PIN_OUTPUT 1
#define CPM_PIN_PRIMARY 0
#define CPM_PIN_SECONDARY 2
#define CPM_PIN_GPIO 4
#define CPM_PIN_OPENDRAIN 8
void cpm2_set_pin(int port, int pin, int flags);
#endif /* __CPM2__ */
#endif /* __KERNEL__ */