[PATCHv9 2/8] ARM: OMAP4: PM: add errata support

[khilman@deeprootsystems.com (Kevin Hilman)]

Tero Kristo <t-kristo@ti.com> writes:

> Added similar PM errata flag support as omap3 has. This should be used
> in similar manner, set the flags during init time, and check the flag
> values during runtime.
>
> Signed-off-by: Tero Kristo <t-kristo@ti.com>

These allow basic suspend/resume to work on 4460/Panda-ES, so I'm going
to queue these up as fixes.

However, since they're not technically regressions, it may be too late
to get them in for v3.7, but they'll be in for v3.8 for sure.

Kevin


> ---
>  arch/arm/mach-omap2/pm.h     |    7 +++++++
>  arch/arm/mach-omap2/pm44xx.c |    1 +
>  2 files changed, 8 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h
> index 707e9cb..f26f2d7 100644
> --- a/arch/arm/mach-omap2/pm.h
> +++ b/arch/arm/mach-omap2/pm.h
> @@ -100,6 +100,13 @@ extern void enable_omap3630_toggle_l2_on_restore(void);
>  static inline void enable_omap3630_toggle_l2_on_restore(void) { }
>  #endif		/* defined(CONFIG_PM) && defined(CONFIG_ARCH_OMAP3) */
>  
> +#if defined(CONFIG_ARCH_OMAP4)
> +extern u16 pm44xx_errata;
> +#define IS_PM44XX_ERRATUM(id)		(pm44xx_errata & (id))
> +#else
> +#define IS_PM44XX_ERRATUM(id)		0
> +#endif
> +
>  #ifdef CONFIG_POWER_AVS_OMAP
>  extern int omap_devinit_smartreflex(void);
>  extern void omap_enable_smartreflex_on_init(void);
> diff --git a/arch/arm/mach-omap2/pm44xx.c b/arch/arm/mach-omap2/pm44xx.c
> index ba06300..07e7ef2 100644
> --- a/arch/arm/mach-omap2/pm44xx.c
> +++ b/arch/arm/mach-omap2/pm44xx.c
> @@ -33,6 +33,7 @@ struct power_state {
>  };
>  
>  static LIST_HEAD(pwrst_list);
> +u16 pm44xx_errata;
>  
>  #ifdef CONFIG_SUSPEND
>  static int omap4_pm_suspend(void)