Subject: [RFC/NOT FOR MERGING] HACK: add global/private timers for A9

From: [email-masked] (Felipe Balbi)
Date: Wed, 3 Jun 2015 22:45:56 -0500

Hi,

On Wed, Jun 03, 2015 at 03:26:20PM -0700, Tony Lindgren wrote:
> * Felipe Balbi <[email-masked]> [150603 13:36]:
> > --- a/arch/arm/mach-omap2/timer.c
> > +++ b/arch/arm/mach-omap2/timer.c
> > @@ -655,20 +655,18 @@ static OMAP_SYS_32K_TIMER_INIT(4, 1, "timer_32k_ck", "ti,timer-alwon",
> >  static DEFINE_TWD_LOCAL_TIMER(twd_local_timer, OMAP44XX_LOCAL_TWD_BASE, 29);
> >  void __init omap4_local_timer_init(void)
> >  {
> > +	int err;
> > +
> >  	omap4_sync32k_timer_init();
> >  	/* Local timers are not supprted on OMAP4430 ES1.0 */
> > -	if (omap_rev() != OMAP4430_REV_ES1_0) {
> > -		int err;
> > -
> > -		if (of_have_populated_dt()) {
> > -			clocksource_of_init();
> > -			return;
> > -		}
> > -
> > -		err = twd_local_timer_register(&twd_local_timer);
> > -		if (err)
> > -			pr_err("twd_local_timer_register failed %d\n", err);
> > +	if (of_have_populated_dt()) {
> > +		clocksource_of_init();
> > +		return;
> >  	}
> > +
> > +	err = twd_local_timer_register(&twd_local_timer);
> > +	if (err)
> > +		pr_err("twd_local_timer_register failed %d\n", err);
> >  }
> >  #else
> >  void __init omap4_local_timer_init(void)
> 
> Looks like can get rid of even more code here, see the patch below.
> 
> Regards,
> 
> Tony
> 
> 8< ------------------------
> From: Tony Lindgren <[email-masked]>
> Date: Wed, 3 Jun 2015 14:40:40 -0700
> Subject: [PATCH] ARM: OMAP2+: Clean up omap4_local_timer_init
> 
> Inspired by a patch from Felipe Balbi <[email-masked]>, we can
> now get rid of most the code in omap4_local_timer_init.
> 
> Omap4 is now device tree only.. And we have not properly supported
> omap4 ES1.0 revision for a really long time AFAIK.
> 
> Let's just remove all that code to simplify things. This assumes
> we have arm,cortex-a9-twd-timer entry in the omap4.dtsi file, which
> we do.
> 
> Signed-off-by: Tony Lindgren <[email-masked]>

very true

Reviewed-by: Felipe Balbi <[email-masked]>

> --- a/arch/arm/mach-omap2/timer.c
> +++ b/arch/arm/mach-omap2/timer.c
> @@ -649,23 +649,10 @@ static OMAP_SYS_32K_TIMER_INIT(4, 1, "timer_32k_ck", "ti,timer-alwon",
>  
>  #ifdef CONFIG_ARCH_OMAP4
>  #ifdef CONFIG_HAVE_ARM_TWD
> -static DEFINE_TWD_LOCAL_TIMER(twd_local_timer, OMAP44XX_LOCAL_TWD_BASE, 29);
>  void __init omap4_local_timer_init(void)
>  {
>  	omap4_sync32k_timer_init();
> -	/* Local timers are not supprted on OMAP4430 ES1.0 */
> -	if (omap_rev() != OMAP4430_REV_ES1_0) {
> -		int err;
> -
> -		if (of_have_populated_dt()) {
> -			clocksource_of_init();
> -			return;
> -		}
> -
> -		err = twd_local_timer_register(&twd_local_timer);
> -		if (err)
> -			pr_err("twd_local_timer_register failed %d\n", err);
> -	}
> +	clocksource_of_init();
>  }
>  #else
>  void __init omap4_local_timer_init(void)

-- 
balbi
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