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

Felipe Balbi
2015-06-04T03:45:56Z

Hi,

On Wed, Jun 03, 2015 at 03:26:20PM -0700, Tony Lindgren wrote:
> * Felipe Balbi <balbi@ti.com> [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 <tony@atomide.com>
> 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 <balbi@ti.com>, 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 <tony@atomide.com>

very true

Reviewed-by: Felipe Balbi <balbi@ti.com>

> --- 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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