[PATCH] arm: ls1021a: setup hrtimer based tick broadcast

[PATCH] arm: ls1021a: setup hrtimer based tick broadcast

[Jingchang Lu]

This adds setup of hrtimer based tick broadcast to utilize
the hrtimer in SMP without other broadcast tick devices.

Signed-off-by: Jingchang Lu <jingchang.lu@freescale.com>
---
 arch/arm/mach-imx/mach-ls1021a.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm/mach-imx/mach-ls1021a.c b/arch/arm/mach-imx/mach-ls1021a.c
index b89c858..4d074cf 100644
--- a/arch/arm/mach-imx/mach-ls1021a.c
+++ b/arch/arm/mach-imx/mach-ls1021a.c
@@ -7,6 +7,10 @@
  * (at your option) any later version.
  */
 
+#include <linux/clockchips.h>
+#include <linux/clk-provider.h>
+#include <linux/clocksource.h>
+
 #include <asm/mach/arch.h>
 
 #include "common.h"
@@ -16,7 +20,15 @@ static const char * const ls1021a_dt_compat[] __initconst = {
 	NULL,
 };
 
+static void __init ls1021a_init_time(void)
+{
+	of_clk_init(NULL);
+	clocksource_of_init();
+	tick_setup_hrtimer_broadcast();
+}
+
 DT_MACHINE_START(LS1021A, "Freescale LS1021A")
 	.smp		= smp_ops(ls1021a_smp_ops),
+	.init_time	= ls1021a_init_time,
 	.dt_compat	= ls1021a_dt_compat,
 MACHINE_END
-- 
1.8.0

[PATCH] arm: ls1021a: setup hrtimer based tick broadcast

[Mark Rutland]

Hi,

On Fri, Dec 05, 2014 at 09:07:29AM +0000, Jingchang Lu wrote:
> This adds setup of hrtimer based tick broadcast to utilize
> the hrtimer in SMP without other broadcast tick devices.
> 
> Signed-off-by: Jingchang Lu <jingchang.lu@freescale.com>

This shouldn't live in board code.

Similarly to what happens with the generic dummy timer on all arches
that select it (and the broadcast hrtimer on all arches that use it so
far), we should just unconditionally register the broadcast hrtimer.

A real broadcast-capable clock event device will take preference if
present, so we don't need to add board-specific code to only register
this in certain conditions.

Mark.

> ---
>  arch/arm/mach-imx/mach-ls1021a.c | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/arch/arm/mach-imx/mach-ls1021a.c b/arch/arm/mach-imx/mach-ls1021a.c
> index b89c858..4d074cf 100644
> --- a/arch/arm/mach-imx/mach-ls1021a.c
> +++ b/arch/arm/mach-imx/mach-ls1021a.c
> @@ -7,6 +7,10 @@
>   * (at your option) any later version.
>   */
>  
> +#include <linux/clockchips.h>
> +#include <linux/clk-provider.h>
> +#include <linux/clocksource.h>
> +
>  #include <asm/mach/arch.h>
>  
>  #include "common.h"
> @@ -16,7 +20,15 @@ static const char * const ls1021a_dt_compat[] __initconst = {
>  	NULL,
>  };
>  
> +static void __init ls1021a_init_time(void)
> +{
> +	of_clk_init(NULL);
> +	clocksource_of_init();
> +	tick_setup_hrtimer_broadcast();
> +}
> +
>  DT_MACHINE_START(LS1021A, "Freescale LS1021A")
>  	.smp		= smp_ops(ls1021a_smp_ops),
> +	.init_time	= ls1021a_init_time,
>  	.dt_compat	= ls1021a_dt_compat,
>  MACHINE_END
> -- 
> 1.8.0
> 
> 
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel at lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
> 

[PATCH] arm: ls1021a: setup hrtimer based tick broadcast

[Preeti U Murthy]

On 12/05/2014 03:57 PM, Mark Rutland wrote:
> Hi,
> 
> On Fri, Dec 05, 2014 at 09:07:29AM +0000, Jingchang Lu wrote:
>> This adds setup of hrtimer based tick broadcast to utilize
>> the hrtimer in SMP without other broadcast tick devices.
>>
>> Signed-off-by: Jingchang Lu <jingchang.lu@freescale.com>
> 
> This shouldn't live in board code.
> 
> Similarly to what happens with the generic dummy timer on all arches
> that select it (and the broadcast hrtimer on all arches that use it so
> far), we should just unconditionally register the broadcast hrtimer.
> 
> A real broadcast-capable clock event device will take preference if
> present, so we don't need to add board-specific code to only register
> this in certain conditions.

Hmm.. this makes sense to me. Let me send out a patch to do this.

Regards
Preeti U Murthy
> 
> Mark.
> 
>> ---
>>  arch/arm/mach-imx/mach-ls1021a.c | 12 ++++++++++++
>>  1 file changed, 12 insertions(+)
>>
>> diff --git a/arch/arm/mach-imx/mach-ls1021a.c b/arch/arm/mach-imx/mach-ls1021a.c
>> index b89c858..4d074cf 100644
>> --- a/arch/arm/mach-imx/mach-ls1021a.c
>> +++ b/arch/arm/mach-imx/mach-ls1021a.c
>> @@ -7,6 +7,10 @@
>>   * (at your option) any later version.
>>   */
>>  
>> +#include <linux/clockchips.h>
>> +#include <linux/clk-provider.h>
>> +#include <linux/clocksource.h>
>> +
>>  #include <asm/mach/arch.h>
>>  
>>  #include "common.h"
>> @@ -16,7 +20,15 @@ static const char * const ls1021a_dt_compat[] __initconst = {
>>  	NULL,
>>  };
>>  
>> +static void __init ls1021a_init_time(void)
>> +{
>> +	of_clk_init(NULL);
>> +	clocksource_of_init();
>> +	tick_setup_hrtimer_broadcast();
>> +}
>> +
>>  DT_MACHINE_START(LS1021A, "Freescale LS1021A")
>>  	.smp		= smp_ops(ls1021a_smp_ops),
>> +	.init_time	= ls1021a_init_time,
>>  	.dt_compat	= ls1021a_dt_compat,
>>  MACHINE_END
>> -- 
>> 1.8.0
>>
>>
>> _______________________________________________
>> linux-arm-kernel mailing list
>> linux-arm-kernel at lists.infradead.org
>> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>>
>