Subject: [PATCH v3 3/7] OMAP2+: use control module mfd driver in omap_type

From: [email-masked] (Tony Lindgren)
Date: Wed, 27 Jun 2012 23:32:36 -0700

Hi,

* Konstantin Baydarov <[email-masked]> [120627 11:09]:
> OMAP system control module can be probed early, then
> omap_type is safe to use its APIs.
> 
> TODO: add support for other omap versions
> 
> Signed-off-by: Konstantin Baydarov <[email-masked]>
> ---
>  arch/arm/mach-omap2/id.c |    9 +++++----
>  1 files changed, 5 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c
> index 00486a8..1b0cec8 100644
> --- a/arch/arm/mach-omap2/id.c
> +++ b/arch/arm/mach-omap2/id.c
> @@ -18,6 +18,7 @@
>  #include <linux/kernel.h>
>  #include <linux/init.h>
>  #include <linux/io.h>
> +#include <linux/mfd/omap_control.h>
>  
>  #include <asm/cputype.h>
>  
> @@ -43,13 +44,13 @@ int omap_type(void)
>  	u32 val = 0;
>  
>  	if (cpu_is_omap24xx()) {
> -		val = omap_ctrl_readl(OMAP24XX_CONTROL_STATUS);
> +		val = omap_control_status_read(OMAP24XX_CONTROL_STATUS);
>  	} else if (cpu_is_am33xx()) {
> -		val = omap_ctrl_readl(AM33XX_CONTROL_STATUS);
> +		val = omap_control_status_read(AM33XX_CONTROL_STATUS);
>  	} else if (cpu_is_omap34xx()) {
> -		val = omap_ctrl_readl(OMAP343X_CONTROL_STATUS);
> +		val = omap_control_status_read(OMAP343X_CONTROL_STATUS);
>  	} else if (cpu_is_omap44xx()) {
> -		val = omap_ctrl_readl(OMAP4_CTRL_MODULE_CORE_STATUS);
> +		val = omap_control_status_read(OMAP4_CTRL_MODULE_CORE_STATUS);
>  	} else {
>  		pr_err("Cannot detect omap type!\n");
>  		goto out;

I think you should keep the CONTROL_STATUS defines private to the
SCM core driver, there should be no need to pass it here. Just
make it int omap_control_status_read(void).

Of course that means that the SCM core is initialized to some extent
to know where to find the CONTROL_STATUS register. That should
probably be done as part of the set_globals calls done in init_early
in mach-omap2/io.c file.

Regards,

Tony