Nishant,
On Tue, Nov 30, 2010 at 01:49, Nishanth Menon <[email protected]> wrote:
> From: Peter 'p2' De Schrijver <[email protected]>
>
> This disables L2 cache before invalidating it and reenables it afterwards.
> This is be done according to ARM documentation. Currently this is identified
> as being needed on OMAP3630 as the disable/enable is done from "public side"
> while, on OMAP3430, this is done in the "secure side".
>
> [[email protected]: ported to 2.6.37-rc2, added hooks to enable the logic only on
> 3630]
> Signed-off-by: Nishanth Menon <[email protected]>
> Signed-off-by: Eduardo Valentin <[email protected]>
> Signed-off-by: Peter 'p2' De Schrijver <[email protected]>
> ---
> v2: rebased out to this series independent of HS bugfixes
> v1: http://marc.info/?l=linux-omap&m=129013171125204&w=2
>
> arch/arm/mach-omap2/pm.h | 6 ++++++
> arch/arm/mach-omap2/pm34xx.c | 3 +++
> arch/arm/mach-omap2/sleep34xx.S | 30 ++++++++++++++++++++++++++++++
> 3 files changed, 39 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h
> index 0d75bfd..aff39d0 100644
> --- a/arch/arm/mach-omap2/pm.h
> +++ b/arch/arm/mach-omap2/pm.h
> @@ -85,4 +85,10 @@ extern unsigned int save_secure_ram_context_sz;
> extern unsigned int omap24xx_cpu_suspend_sz;
> extern unsigned int omap34xx_cpu_suspend_sz;
>
> +#if defined(CONFIG_PM)
> +extern void enable_omap3630_toggle_l2_on_restore(void);
> +#else
> +static inline void enable_omap3630_toggle_l2_on_restore(void) { }
> +#endif
> +
> #endif
> diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
> index bd426cc..e0ade5f 100644
> --- a/arch/arm/mach-omap2/pm34xx.c
> +++ b/arch/arm/mach-omap2/pm34xx.c
> @@ -988,6 +988,9 @@ static void pm_errata_configure(void)
> if (cpu_is_omap34xx()) {
> if (cpu_is_omap3630())
> pm34xx_errata |= RTA_ERRATUM_i608;
> + /* Enable the l2 cache toggling in sleep logic */
> + if (cpu_is_omap3630())
> + enable_omap3630_toggle_l2_on_restore();
This can simply be like this:
...
...
- if (cpu_is_omap3630())
+ if (cpu_is_omap3630()) {
pm34xx_errata |= RTA_ERRATUM_i608;
+ /* Enable the l2 cache toggling in sleep logic */
+ enable_omap3630_toggle_l2_on_restore();
+ }
...
...
> }
> }
>
--
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