On Tue, 28 Aug 2007 15:19:24 -0500
Scott Wood wrote:
> This provides a generic way for board code to set up CPM pins, rather
> than directly poking magic values into registers.
>
Please provide more info either here or somewhere in Documentation/, or inside
the code at least.
We're adding new utility function here, and need to describe in a nutshell now
the thing works.
This is completely self-explanatory for limited amount of people, I mean.
> Signed-off-by: Scott Wood <[EMAIL PROTECTED]>
> ---
> arch/powerpc/sysdev/cpm2_common.c | 33
> +++++++++++++++++++++++++++++++++ include/asm-powerpc/cpm2.h
> | 9 +++++++++ 2 files changed, 42 insertions(+), 0 deletions(-)
>
> diff --git a/arch/powerpc/sysdev/cpm2_common.c
> b/arch/powerpc/sysdev/cpm2_common.c index 549da4b..b8460c0 100644
> --- a/arch/powerpc/sysdev/cpm2_common.c
> +++ b/arch/powerpc/sysdev/cpm2_common.c
> @@ -418,3 +418,36 @@ void *cpm_dpram_addr(unsigned long offset)
> return (void __force *)(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);
> +}
> diff --git a/include/asm-powerpc/cpm2.h b/include/asm-powerpc/cpm2.h
> index 41a45db..d7b57ac 100644
> --- a/include/asm-powerpc/cpm2.h
> +++ b/include/asm-powerpc/cpm2.h
> @@ -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__ */
--
Sincerely, Vitaly
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